main (8a17c3d19) vs feat/Migrate-Decoder-And-Tests-to-NNX (4f008c550)| Metric | main 8a17c3d19 | feat/Migrate-Decoder-And-Tests-to-NNX 4f008c550 | Diff (feat/Migrate-Decoder-And-Tests-to-NNX − main) |
|---|---|---|---|
| Parameters | 1.105 billion | 1.105 billion | — |
| Final loss | 6.1670 | 6.1670 | 0 |
| TFLOP/s | 85.783 | 85.963 | +0.18 |
| Tok/s | 12930.1 | 12957.3 | +27.16 |
| Avg s/step | 1.679 | 2.700 | +1.021 |
| Memory % | 1.44 | 1.44 | 0 |
| JAX | 0.9.2 | 0.8.1 | — |
Diff = branch value − main value. Green = branch improved. Red = branch regressed.
XPK Start: Wed Apr 22 07:26:18 UTC 2026 PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used. `rope_parameters`'s factor field must be a float >= 1, got 40 `rope_parameters`'s beta_fast field must be a float, got 32 `rope_parameters`'s beta_slow field must be a float, got 1 DeepseekV32Config got `key=rope_scaling` in kwargs but hasn't set it as attribute. For RoPE standardization you need to set `self.rope_parameters` in model's config. 2026-04-22 07:26:43.851759: E external/local_xla/xla/stream_executor/cuda/cuda_platform.cc:51] failed call to cuInit: INTERNAL: CUDA error: Failed call to cuInit: UNKNOWN ERROR (303) I0422 07:26:44.063495 135333372073792 max_utils.py:273] Attempting to initialize the jax distributed system... I0422 07:26:53.104436 135333372073792 distributed.py:149] Starting JAX distributed service on [::]:8482 I0422 07:26:53.106833 135333372073792 distributed.py:172] Connecting to JAX distributed service on mt-05-fp8-68gsk-slice-job-0-0.mt-05-fp8-68gsk:8482 I0422 07:26:55.272066 135333372073792 max_utils.py:284] Jax distributed system initialized! I0422 07:27:01.547978 135333372073792 max_utils.py:800] System Information: Jax Version: 0.9.2 I0422 07:27:01.548087 135333372073792 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0422 07:27:01.548127 135333372073792 max_utils.py:802] System Information: Jax Backend: PJRT C API TFRT TPU v6 lite Built on Mar 4 2026 11:32:08 (1772652728) cl/878335365 I0422 07:27:01.548163 135333372073792 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0422 07:27:02.240637 135333372073792 maxtext_utils.py:1604] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0422 07:27:02.240922 135333372073792 checkpointing.py:677] Setting up checkpoint logger... I0422 07:27:02.240976 135333372073792 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True I0422 07:27:02.241021 135333372073792 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0422 07:27:02.241388 135333372073792 base_pytree_checkpoint_handler.py:441] Created BasePyTreeCheckpointHandler: use_ocdbt=True, use_zarr3=True, pytree_metadata_options=PyTreeMetadataOptions(support_rich_types=False), array_metadata_store=<orbax.checkpoint._src.metadata.array_metadata_store.Store object at 0x7b1509d50620>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0422 07:27:05.239210 135333372073792 checkpointing.py:265] Enabling policy for fixed interval checkpointing. I0422 07:27:05.239479 135333372073792 checkpoint_manager.py:708] [process=6][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7b003437aa50>}, handler_registry=None I0422 07:27:05.239731 135333372073792 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7b003437aa50>` for item "items" and save args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>` to `_handler_registry`. I0422 07:27:05.239784 135333372073792 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7b0108284f80>` for item "metrics" and save args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>` to `_handler_registry`. I0422 07:27:05.239820 135333372073792 composite_checkpoint_handler.py:505] Initialized registry DefaultCheckpointHandlerRegistry({('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeSaveArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7b003437aa50>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7b003437aa50>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7b0108284f80>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7b0108284f80>}). I0422 07:27:05.240174 135333372073792 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0422 07:27:05.240271 135333372073792 async_checkpointer.py:192] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7b000858d6c0> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0422 07:27:06.368745 135333372073792 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260422_071422/linen_xpk_main_20260422_071422_05_fp8/checkpoints I0422 07:27:07.222933 135333372073792 checkpoint_manager.py:929] [process=6][thread=MainThread] CheckpointManager created, primary_host=0, CheckpointManagerOptions=CheckpointManagerOptions(save_interval_steps=1, max_to_keep=None, keep_time_interval=None, keep_period=None, should_keep_fn=None, best_fn=None, best_mode='max', keep_checkpoints_without_metrics=True, step_prefix=None, step_format_fixed_length=None, step_name_format=None, create=True, cleanup_tmp_directories=False, save_on_steps=frozenset(), single_host_load_and_broadcast=False, todelete_subdir=None, todelete_full_path=None, enable_background_delete=False, read_only=False, enable_async_checkpointing=True, async_options=None, multiprocessing_options=MultiprocessingOptions(primary_host=0, active_processes=None, barrier_sync_key_prefix=None), should_save_fn=None, file_options=FileOptions(path_permission_mode=None), save_root_metadata=True, temporary_path_class=None, save_decision_policy=FixedIntervalPolicy(interval=10), preservation_policy=LatestN(n=None), prevent_write_metrics=False, enable_should_save_is_saving_in_progress_check=True, enable_per_process_directory_creation=False, lightweight_initialize=False), root_directory=gs://lance-maxtext/linen_ckpt_xpk_main_20260422_071422/linen_xpk_main_20260422_071422_05_fp8/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7b0108283050> I0422 07:27:07.223107 135333372073792 checkpointing.py:301] Checkpoint manager created! I0422 07:27:08.304450 135333372073792 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0422 07:27:08.304571 135333372073792 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0422 07:27:08.697253 135333372073792 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0422 07:27:08.697368 135333372073792 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0422 07:27:08.713508 135333372073792 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0422 07:27:08.713570 135333372073792 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0422 07:27:08.765725 135333372073792 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0422 07:27:08.765810 135333372073792 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0422 07:27:08.782114 135333372073792 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0422 07:27:08.782179 135333372073792 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0422 07:27:08.798487 135333372073792 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0422 07:27:08.798551 135333372073792 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0422 07:27:08.823938 135333372073792 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0422 07:27:08.824009 135333372073792 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0422 07:27:08.875435 135333372073792 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0422 07:27:08.875514 135333372073792 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0422 07:27:09.312471 135333372073792 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint I0422 07:27:09.312587 135333372073792 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0422 07:27:11.251715 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0422 07:27:11.251842 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: P() Physical: () I0422 07:27:11.251891 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0422 07:27:11.251931 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: P() Physical: () I0422 07:27:11.251965 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0422 07:27:11.251998 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: P() Physical: () I0422 07:27:11.252030 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0422 07:27:11.252062 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: P() Physical: () I0422 07:27:11.252092 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0422 07:27:11.252130 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: P() Physical: () I0422 07:27:11.252161 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0422 07:27:11.252191 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: P() Physical: () I0422 07:27:11.252223 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0422 07:27:11.252254 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: P() Physical: () I0422 07:27:11.252303 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0422 07:27:11.252342 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: P() Physical: () I0422 07:27:11.252376 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0422 07:27:11.252406 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: P() Physical: () I0422 07:27:11.252435 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0422 07:27:11.252463 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: P() Physical: () I0422 07:27:11.252491 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0422 07:27:11.252518 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: P() Physical: () I0422 07:27:11.252545 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0422 07:27:11.252573 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: P() Physical: () I0422 07:27:11.252602 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0422 07:27:11.252629 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: P() Physical: () I0422 07:27:11.252656 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0422 07:27:11.252703 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: P() Physical: () I0422 07:27:11.252734 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0422 07:27:11.252761 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: P() Physical: () I0422 07:27:11.252788 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0422 07:27:11.252816 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: P() Physical: () I0422 07:27:11.252843 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0422 07:27:11.252869 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: P() Physical: () I0422 07:27:11.252896 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0422 07:27:11.252922 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: P() Physical: () I0422 07:27:11.252948 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0422 07:27:11.252974 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: P() Physical: () I0422 07:27:11.253001 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0422 07:27:11.253028 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: P() Physical: () I0422 07:27:11.253055 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0422 07:27:11.253083 135333372073792 maxtext_utils.py:1707] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: P() Physical: () I0422 07:27:11.253140 135333372073792 maxtext_utils.py:1707] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0422 07:27:11.253196 135333372073792 maxtext_utils.py:1707] params/params/decoder/layers/mlp/wi_0/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0422 07:27:11.253235 135333372073792 maxtext_utils.py:1707] params/params/decoder/layers/mlp/wi_1/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0422 07:27:11.253293 135333372073792 maxtext_utils.py:1707] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: P('mlp', 'layers', 'embed') Physical: (None, None, 'fsdp') I0422 07:27:11.253343 135333372073792 maxtext_utils.py:1707] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0422 07:27:11.253378 135333372073792 maxtext_utils.py:1707] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0422 07:27:11.253426 135333372073792 maxtext_utils.py:1707] params/params/decoder/layers/self_attention/key/kernel Shape: float32[2048,16,16,128] Logical: P('embed', 'layers', 'kv_heads', 'kv_head_dim') Physical: ('fsdp', None, None, None) I0422 07:27:11.253473 135333372073792 maxtext_utils.py:1707] params/params/decoder/layers/self_attention/out/kernel Shape: float32[16,16,128,2048] Logical: P('heads', 'layers', 'kv', 'embed') Physical: (None, None, None, 'fsdp') I0422 07:27:11.253508 135333372073792 maxtext_utils.py:1707] params/params/decoder/layers/self_attention/query/kernel Shape: float32[2048,16,16,128] Logical: P('embed', 'layers', 'q_heads', 'kv') Physical: ('fsdp', None, None, None) I0422 07:27:11.253541 135333372073792 maxtext_utils.py:1707] params/params/decoder/layers/self_attention/value/kernel Shape: float32[2048,16,16,128] Logical: P('embed', 'layers', 'kv_heads', 'kv_head_dim') Physical: ('fsdp', None, None, None) I0422 07:27:11.253585 135333372073792 maxtext_utils.py:1707] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0422 07:27:11.253628 135333372073792 maxtext_utils.py:1707] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0422 07:27:12.892688 135333372073792 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0422 07:27:12.892782 135333372073792 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0422 07:27:12.908140 135333372073792 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0422 07:27:12.908202 135333372073792 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0422 07:27:26.961371 135333372073792 max_utils.py:791] Total memory size: 1.5 GB, Output size: 0.4 GB, Temp size: 1.1 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB. I0422 07:27:26.962322 135333372073792 metric_logger.py:301] number parameters: 1.105 billion I0422 07:27:42.335369 135333372073792 checkpointing.py:772] Waiting for step 0 to finish before checkpoint... I0422 07:27:42.502927 135333372073792 checkpointing.py:776] Waited 0.16753888130187988 seconds for step 0 to finish before starting checkpointing. I0422 07:27:42.505397 135333372073792 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0422 07:27:42.507488 135333372073792 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 0 I0422 07:27:42.508924 135333372073792 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260422_071422/linen_xpk_main_20260422_071422_05_fp8/checkpoints/0. I0422 07:27:43.268095 135333372073792 signaling_client.py:364] Using JaxDistributedSignalingClient I0422 07:27:43.269100 135333372073792 jax_array_handlers.py:360] Scheduling D2H of 81 prioritized jax.Array. I0422 07:27:43.269168 135333372073792 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0422 07:27:43.695445 135333372073792 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.427470s I0422 07:27:43.695613 135333372073792 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 3.538 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.4360814094543457 s) (per-host) I0422 07:27:43.695667 135333372073792 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.436145s (batch_requests_ready=0.003845s, total_serialization_initiated=0.432228s, others=0.000071s) I0422 07:27:43.695761 135333372073792 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.440322s (all_items=0.000018s, per_item={'items': '0.00001764'}, temp_paths=0.440304) I0422 07:27:43.696556 135333372073792 event_tracking.py:125] [process=6] [async] Finished blocking save in 1.19 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260422_071422/linen_xpk_main_20260422_071422_05_fp8/checkpoints/0. I0422 07:27:43.696902 135204415121152 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-22 07:47:43.696863 I0422 07:27:43.698942 135333372073792 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0422 07:27:43.699244 135204386715392 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0422 07:27:43.699424 135333372073792 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260422_071422/linen_xpk_main_20260422_071422_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776842862.50538, 'wait_for_prev_duration_secs': 6.0558319091796875e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776842862.5075285, 'checkpointer_blocking_duration_secs': 1.18953537940979, 'get_old_steps_start_time': 1776842863.6970887, 'get_old_steps_duration_secs': 3.218650817871094e-05, 'checkpoint_manager_blocking_start_time': 1776842862.5035858, 'checkpoint_manager_blocking_duration_secs': 1.1957981586456299} I0422 07:27:43.699532 135333372073792 checkpointing.py:408] Started an asynchronous checkpoint save for step 0 I0422 07:27:43.699585 135333372073792 max_utils.py:750] Memstats: After params initialized: I0422 07:27:43.699634 135333372073792 max_utils.py:756] Using (GB) 0.45 / 31.25 (1.440000%) on TPU_24(process=6,(0,6,0,0)) I0422 07:27:43.699670 135333372073792 max_utils.py:756] Using (GB) 0.45 / 31.25 (1.440000%) on TPU_25(process=6,(1,6,0,0)) I0422 07:27:43.699698 135333372073792 max_utils.py:756] Using (GB) 0.45 / 31.25 (1.440000%) on TPU_28(process=6,(0,7,0,0)) I0422 07:27:43.699724 135333372073792 max_utils.py:756] Using (GB) 0.45 / 31.25 (1.440000%) on TPU_29(process=6,(1,7,0,0)) I0422 07:27:44.018577 135333372073792 metric_logger.py:196] completed step: 0, seconds: 15.373, TFLOP/s/device: 0.884, Tokens/s/device: 133.221, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52776.805 I0422 07:27:44.212087 135333372073792 metric_logger.py:196] completed step: 1, seconds: 1.681, TFLOP/s/device: 8.082, Tokens/s/device: 1218.225, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52761.840 I0422 07:27:44.645320 135333372073792 metric_logger.py:196] completed step: 2, seconds: 0.036, TFLOP/s/device: 377.263, Tokens/s/device: 56865.195, total_weights: 65536, loss: 10.816, lm_loss: 10.816, perplexity: 49832.398 I0422 07:27:44.803481 135333372073792 metric_logger.py:196] completed step: 3, seconds: 0.433, TFLOP/s/device: 31.349, Tokens/s/device: 4725.329, total_weights: 65536, loss: 10.431, lm_loss: 10.431, perplexity: 33901.820 I0422 07:27:45.121147 135333372073792 metric_logger.py:196] completed step: 4, seconds: 0.164, TFLOP/s/device: 82.728, Tokens/s/device: 12469.633, total_weights: 65536, loss: 9.992, lm_loss: 9.992, perplexity: 21847.639 I0422 07:27:45.127038 135333372073792 metric_logger.py:196] completed step: 5, seconds: 0.158, TFLOP/s/device: 85.994, Tokens/s/device: 12962.025, total_weights: 65536, loss: 9.549, lm_loss: 9.549, perplexity: 14035.006 I0422 07:27:46.602230 2798 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0422 07:27:50.053838 135204395108096 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 81 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260422_071422/linen_xpk_main_20260422_071422_05_fp8/checkpoints/0/items/array_metadatas/process_6 I0422 07:28:03.224945 135204415121152 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 79.125 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 19.965373039245605 s) (per-host) I0422 07:28:03.225085 135204415121152 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 19.528069s. I0422 07:28:09.831923 135333372073792 metric_logger.py:196] completed step: 6, seconds: 0.318, TFLOP/s/device: 42.771, Tokens/s/device: 6446.982, total_weights: 65536, loss: 9.111, lm_loss: 9.111, perplexity: 9058.688 I0422 07:28:09.990351 135333372073792 metric_logger.py:196] completed step: 7, seconds: 24.548, TFLOP/s/device: 0.553, Tokens/s/device: 83.429, total_weights: 65536, loss: 8.685, lm_loss: 8.685, perplexity: 5914.720 I0422 07:28:10.148869 135333372073792 metric_logger.py:196] completed step: 8, seconds: 0.163, TFLOP/s/device: 83.153, Tokens/s/device: 12533.660, total_weights: 65536, loss: 8.281, lm_loss: 8.281, perplexity: 3950.010 I0422 07:28:10.155040 135333372073792 checkpointing.py:772] Waiting for step 10 to finish before checkpoint... I0422 07:28:10.465562 135333372073792 checkpointing.py:776] Waited 0.310497522354126 seconds for step 10 to finish before starting checkpointing. I0422 07:28:10.468173 135333372073792 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0422 07:28:11.938017 135204415121152 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 28.240983s. I0422 07:28:11.938325 135204386715392 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0422 07:28:11.938446 135204386715392 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0422 07:28:11.938498 135204386715392 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0422 07:28:11.940122 135204386715392 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0422 07:28:11.940251 135333372073792 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0. W0422 07:28:11.940355 135333372073792 checkpoint_manager.py:1452] Waiting for previous save to complete took 1.472185 seconds. If this number is high, consider checkpointing less frequently. I0422 07:28:11.942583 135333372073792 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 10 I0422 07:28:11.944607 135333372073792 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260422_071422/linen_xpk_main_20260422_071422_05_fp8/checkpoints/10. I0422 07:28:12.643826 135333372073792 jax_array_handlers.py:360] Scheduling D2H of 81 prioritized jax.Array. I0422 07:28:12.643918 135333372073792 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0422 07:28:12.704690 135333372073792 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.061921s I0422 07:28:12.704854 135333372073792 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 22.579 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.06832718849182129 s) (per-host) I0422 07:28:12.704901 135333372073792 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.068384s (batch_requests_ready=0.003321s, total_serialization_initiated=0.064999s, others=0.000064s) I0422 07:28:12.704998 135333372073792 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.072731s (all_items=0.000015s, per_item={'items': '0.00001526'}, temp_paths=0.072716) I0422 07:28:12.705651 135333372073792 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.76 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260422_071422/linen_xpk_main_20260422_071422_05_fp8/checkpoints/10. I0422 07:28:12.706000 135204386715392 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-22 07:48:12.705962 I0422 07:28:12.708037 135333372073792 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize I0422 07:28:12.708356 135201200006912 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0422 07:28:12.708498 135333372073792 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260422_071422/linen_xpk_main_20260422_071422_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776842890.4681423, 'wait_for_prev_duration_secs': 1.4721853733062744, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776842891.942622, 'checkpointer_blocking_duration_secs': 0.7635326385498047, 'get_old_steps_start_time': 1776842892.706178, 'get_old_steps_duration_secs': 3.1948089599609375e-05, 'checkpoint_manager_blocking_start_time': 1776842890.4664054, 'checkpoint_manager_blocking_duration_secs': 2.242058277130127} I0422 07:28:12.708675 135333372073792 checkpointing.py:408] Started an asynchronous checkpoint save for step 10 I0422 07:28:12.709346 135333372073792 metric_logger.py:196] completed step: 9, seconds: 0.158, TFLOP/s/device: 85.854, Tokens/s/device: 12940.894, total_weights: 65536, loss: 7.908, lm_loss: 7.908, perplexity: 2720.116 I0422 07:28:12.716763 135333372073792 metric_logger.py:196] completed step: 10, seconds: 0.160, TFLOP/s/device: 85.161, Tokens/s/device: 12836.423, total_weights: 65536, loss: 7.568, lm_loss: 7.568, perplexity: 1936.198 I0422 07:28:12.874706 135333372073792 metric_logger.py:196] completed step: 11, seconds: 2.559, TFLOP/s/device: 5.309, Tokens/s/device: 800.195, total_weights: 65536, loss: 7.288, lm_loss: 7.288, perplexity: 1463.272 I0422 07:28:13.440210 135333372073792 metric_logger.py:196] completed step: 12, seconds: 0.007, TFLOP/s/device: 2063.972, Tokens/s/device: 311104.360, total_weights: 65536, loss: 7.032, lm_loss: 7.032, perplexity: 1132.061 I0422 07:28:13.598575 135333372073792 metric_logger.py:196] completed step: 13, seconds: 0.561, TFLOP/s/device: 24.216, Tokens/s/device: 3650.084, total_weights: 65536, loss: 6.815, lm_loss: 6.815, perplexity: 911.031 I0422 07:28:13.756779 135333372073792 metric_logger.py:196] completed step: 14, seconds: 0.163, TFLOP/s/device: 83.238, Tokens/s/device: 12546.559, total_weights: 65536, loss: 6.635, lm_loss: 6.635, perplexity: 761.080 I0422 07:28:13.915349 135333372073792 metric_logger.py:196] completed step: 15, seconds: 0.158, TFLOP/s/device: 85.813, Tokens/s/device: 12934.682, total_weights: 65536, loss: 6.492, lm_loss: 6.492, perplexity: 659.915 I0422 07:28:14.073688 135333372073792 metric_logger.py:196] completed step: 16, seconds: 0.158, TFLOP/s/device: 85.888, Tokens/s/device: 12945.966, total_weights: 65536, loss: 6.380, lm_loss: 6.380, perplexity: 589.948 I0422 07:28:14.231964 135333372073792 metric_logger.py:196] completed step: 17, seconds: 0.159, TFLOP/s/device: 85.670, Tokens/s/device: 12913.070, total_weights: 65536, loss: 6.293, lm_loss: 6.293, perplexity: 540.941 I0422 07:28:14.390337 135333372073792 metric_logger.py:196] completed step: 18, seconds: 0.158, TFLOP/s/device: 85.869, Tokens/s/device: 12943.102, total_weights: 65536, loss: 6.223, lm_loss: 6.223, perplexity: 504.108 I0422 07:28:14.547967 135333372073792 checkpointing.py:772] Waiting for step 19 to finish before checkpoint... I0422 07:28:14.548979 135333372073792 checkpointing.py:776] Waited 0.0010323524475097656 seconds for step 19 to finish before starting checkpointing. I0422 07:28:14.551079 135333372073792 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0422 07:28:18.239221 135201174828800 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 81 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260422_071422/linen_xpk_main_20260422_071422_05_fp8/checkpoints/10/items/array_metadatas/process_6 I0422 07:28:54.934067 135204386715392 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 37.349 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.2974808216095 s) (per-host) I0422 07:28:54.934198 135204386715392 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.228076s. I0422 07:29:02.679600 135204386715392 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 49.973461s. I0422 07:29:02.679893 135201200006912 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0422 07:29:02.680017 135201200006912 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0422 07:29:02.680068 135201200006912 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts... I0422 07:29:02.681487 135201200006912 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts. I0422 07:29:02.681666 135333372073792 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=10][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=10. W0422 07:29:02.681789 135333372073792 checkpoint_manager.py:1452] Waiting for previous save to complete took 48.130715 seconds. If this number is high, consider checkpointing less frequently. I0422 07:29:02.684276 135333372073792 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 19 I0422 07:29:02.686276 135333372073792 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260422_071422/linen_xpk_main_20260422_071422_05_fp8/checkpoints/19. I0422 07:29:03.430472 135333372073792 jax_array_handlers.py:360] Scheduling D2H of 81 prioritized jax.Array. I0422 07:29:03.430567 135333372073792 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0422 07:29:03.490147 135333372073792 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.060668s I0422 07:29:03.490324 135333372073792 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 22.946 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.06723475456237793 s) (per-host) I0422 07:29:03.490372 135333372073792 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.067294s (batch_requests_ready=0.003303s, total_serialization_initiated=0.063927s, others=0.000064s) I0422 07:29:03.490470 135333372073792 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.071550s (all_items=0.000012s, per_item={'items': '0.00001168'}, temp_paths=0.071539) I0422 07:29:03.491123 135333372073792 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.81 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260422_071422/linen_xpk_main_20260422_071422_05_fp8/checkpoints/19. I0422 07:29:03.491473 135201200006912 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-22 07:49:03.491433 I0422 07:29:03.493467 135333372073792 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize I0422 07:29:03.493692 135201174828800 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0422 07:29:03.493792 135333372073792 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260422_071422/linen_xpk_main_20260422_071422_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776842894.5510504, 'wait_for_prev_duration_secs': 48.13071537017822, 'time_between_consecutive_saves_sec': 2.610888957977295, 'checkpointer_blocking_start_time': 1776842942.6843297, 'checkpointer_blocking_duration_secs': 0.8072867393493652, 'get_old_steps_start_time': 1776842943.4916358, 'get_old_steps_duration_secs': 2.6226043701171875e-05, 'checkpoint_manager_blocking_start_time': 1776842894.5492687, 'checkpoint_manager_blocking_duration_secs': 48.94449162483215} I0422 07:29:03.493960 135333372073792 checkpointing.py:408] Started an asynchronous checkpoint save for step 19 I0422 07:29:03.494005 135333372073792 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0422 07:29:08.636494 135201703307008 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 81 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260422_071422/linen_xpk_main_20260422_071422_05_fp8/checkpoints/19/items/array_metadatas/process_6 I0422 07:29:45.772080 135201200006912 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 37.303 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.348944425582886 s) (per-host) I0422 07:29:45.772202 135201200006912 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.280615s. I0422 07:29:52.540896 135201200006912 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 49.049291s. I0422 07:29:52.541145 135201174828800 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0422 07:29:52.541203 135201174828800 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0422 07:29:52.541252 135201174828800 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts... I0422 07:29:52.542946 135201174828800 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts. I0422 07:29:52.543098 135333372073792 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=19][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=19. I0422 07:29:52.543248 135333372073792 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0422 07:29:52.544183 135333372073792 metric_logger.py:196] completed step: 19, seconds: 0.158, TFLOP/s/device: 85.783, Tokens/s/device: 12930.109, total_weights: 65536, loss: 6.167, lm_loss: 6.167, perplexity: 476.947 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Wed Apr 22 07:30:03 UTC 2026 EXIT_CODE=0
4f008c550
· feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741
· full log
XPK Start: Wed Apr 22 19:17:53 UTC 2026 2026-04-22 19:17:57.523911: E external/local_xla/xla/stream_executor/cuda/cuda_fft.cc:467] Unable to register cuFFT factory: Attempting to register factory for plugin cuFFT when one has already been registered WARNING: All log messages before absl::InitializeLog() is called are written to STDERR E0000 00:00:1776885477.537274 10 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered E0000 00:00:1776885477.541015 10 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered W0000 00:00:1776885477.552608 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776885477.552625 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776885477.552628 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776885477.552630 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. 2026-04-22 19:18:16.724557: E external/local_xla/xla/stream_executor/cuda/cuda_platform.cc:51] failed call to cuInit: INTERNAL: CUDA error: Failed call to cuInit: UNKNOWN ERROR (303) I0422 19:18:17.251245 139074349336384 max_utils.py:273] Attempting to initialize the jax distributed system... INFO:2026-04-22 19:18:26,291:jax._src.distributed:140: Starting JAX distributed service on [::]:8482 I0422 19:18:26.291758 139074349336384 distributed.py:140] Starting JAX distributed service on [::]:8482 INFO:2026-04-22 19:18:26,297:jax._src.distributed:157: Connecting to JAX distributed service on mt-05-fp8-55ds1-slice-job-0-0.mt-05-fp8-55ds1:8482 I0422 19:18:26.297470 139074349336384 distributed.py:157] Connecting to JAX distributed service on mt-05-fp8-55ds1-slice-job-0-0.mt-05-fp8-55ds1:8482 I0422 19:18:27.607131 139074349336384 max_utils.py:284] Jax distributed system initialized! I0422 19:18:34.396921 139074349336384 max_utils.py:800] System Information: Jax Version: 0.8.1 I0422 19:18:34.397028 139074349336384 max_utils.py:801] System Information: Jaxlib Version: 0.8.1 I0422 19:18:34.397069 139074349336384 max_utils.py:802] System Information: Jax Backend: PJRT C API TFRT TPU v6 lite Built on Nov 12 2025 14:16:36 (1762985796) cl/831091709 I0422 19:18:34.397121 139074349336384 train_utils.py:347] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0422 19:18:35.013904 139074349336384 maxtext_utils.py:1517] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0422 19:18:35.014227 139074349336384 checkpointing.py:677] Setting up checkpoint logger... I0422 19:18:35.014288 139074349336384 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True I0422 19:18:35.014334 139074349336384 pytree_checkpoint_handler.py:589] save_device_host_concurrent_bytes=None I0422 19:18:35.014694 139074349336384 base_pytree_checkpoint_handler.py:415] Created BasePyTreeCheckpointHandler: use_ocdbt=True, use_zarr3=True, pytree_metadata_options=PyTreeMetadataOptions(support_rich_types=False), array_metadata_store=<orbax.checkpoint._src.metadata.array_metadata_store.Store object at 0x7e7c493ac890>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0422 19:18:37.897572 139074349336384 checkpointing.py:265] Enabling policy for fixed interval checkpointing. I0422 19:18:37.897817 139074349336384 checkpoint_manager.py:709] [process=6][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e69d32d7920>}, handler_registry=None I0422 19:18:37.898050 139074349336384 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e69d32d7920>` for item "items" and save args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>` to `_handler_registry`. I0422 19:18:37.898113 139074349336384 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e69d28677d0>` for item "metrics" and save args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>` to `_handler_registry`. I0422 19:18:37.898149 139074349336384 composite_checkpoint_handler.py:505] Initialized registry DefaultCheckpointHandlerRegistry({('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeSaveArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e69d32d7920>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e69d32d7920>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e69d28677d0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e69d28677d0>}). I0422 19:18:37.898648 139074349336384 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.33 I0422 19:18:37.898727 139074349336384 async_checkpointer.py:177] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7e68300ce840> timeout: 600 secs and primary_host=0 for async checkpoint writes I0422 19:18:39.049420 139074349336384 checkpoint_manager.py:1818] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741_05_fp8/checkpoints I0422 19:18:39.489746 139074349336384 checkpoint_manager.py:929] [process=6][thread=MainThread] CheckpointManager created, primary_host=0, CheckpointManagerOptions=CheckpointManagerOptions(save_interval_steps=1, max_to_keep=None, keep_time_interval=None, keep_period=None, should_keep_fn=None, best_fn=None, best_mode='max', keep_checkpoints_without_metrics=True, step_prefix=None, step_format_fixed_length=None, step_name_format=None, create=True, cleanup_tmp_directories=False, save_on_steps=frozenset(), single_host_load_and_broadcast=False, todelete_subdir=None, todelete_full_path=None, enable_background_delete=False, read_only=False, enable_async_checkpointing=True, async_options=None, multiprocessing_options=MultiprocessingOptions(primary_host=0, active_processes=None, barrier_sync_key_prefix=None), should_save_fn=None, file_options=FileOptions(path_permission_mode=None), save_root_metadata=True, temporary_path_class=None, save_decision_policy=FixedIntervalPolicy(interval=10), preservation_policy=LatestN(n=None), prevent_write_metrics=False, enable_should_save_is_saving_in_progress_check=True, enable_per_process_directory_creation=False, lightweight_initialize=False), root_directory=gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741_05_fp8/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7e69d2864fe0> I0422 19:18:39.489919 139074349336384 checkpointing.py:301] Checkpoint manager created! I0422 19:18:40.595680 139074349336384 nnx_wrappers.py:442] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0422 19:18:40.595788 139074349336384 nnx_wrappers.py:442] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0422 19:18:40.968004 139074349336384 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0422 19:18:40.968111 139074349336384 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0422 19:18:40.983792 139074349336384 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0422 19:18:40.983853 139074349336384 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0422 19:18:41.043221 139074349336384 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0422 19:18:41.043307 139074349336384 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0422 19:18:41.059239 139074349336384 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0422 19:18:41.059301 139074349336384 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0422 19:18:41.075078 139074349336384 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0422 19:18:41.075155 139074349336384 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0422 19:18:41.099895 139074349336384 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0422 19:18:41.099967 139074349336384 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0422 19:18:41.159776 139074349336384 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0422 19:18:41.159865 139074349336384 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0422 19:18:41.628984 139074349336384 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint I0422 19:18:41.629125 139074349336384 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0422 19:18:43.674982 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0422 19:18:43.675126 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0422 19:18:43.675182 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0422 19:18:43.675222 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0422 19:18:43.675255 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0422 19:18:43.675292 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0422 19:18:43.675323 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0422 19:18:43.675353 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0422 19:18:43.675381 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0422 19:18:43.675408 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0422 19:18:43.675436 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0422 19:18:43.675464 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0422 19:18:43.675491 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0422 19:18:43.675522 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0422 19:18:43.675551 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0422 19:18:43.675579 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0422 19:18:43.675606 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0422 19:18:43.675633 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0422 19:18:43.675660 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0422 19:18:43.675687 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0422 19:18:43.675713 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0422 19:18:43.675738 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0422 19:18:43.675763 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0422 19:18:43.675788 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0422 19:18:43.675814 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0422 19:18:43.675838 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0422 19:18:43.675863 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0422 19:18:43.675888 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0422 19:18:43.675912 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0422 19:18:43.675937 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0422 19:18:43.675962 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0422 19:18:43.675987 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0422 19:18:43.676011 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0422 19:18:43.676035 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0422 19:18:43.676059 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0422 19:18:43.676084 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0422 19:18:43.676141 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0422 19:18:43.676174 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0422 19:18:43.676201 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0422 19:18:43.676226 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0422 19:18:43.676251 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0422 19:18:43.676280 139074349336384 maxtext_utils.py:1620] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0422 19:18:43.676330 139074349336384 maxtext_utils.py:1620] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: PartitionSpec('norm',) Physical: (None,) I0422 19:18:43.676380 139074349336384 maxtext_utils.py:1620] params/params/decoder/layers/mlp/wi_0/kernel Shape: float32[2048,16,7168] Logical: PartitionSpec('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0422 19:18:43.676414 139074349336384 maxtext_utils.py:1620] params/params/decoder/layers/mlp/wi_1/kernel Shape: float32[2048,16,7168] Logical: PartitionSpec('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0422 19:18:43.676456 139074349336384 maxtext_utils.py:1620] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: PartitionSpec('mlp', 'layers', 'embed') Physical: (None, None, 'fsdp') I0422 19:18:43.676497 139074349336384 maxtext_utils.py:1620] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: PartitionSpec('norm', 'layers') Physical: (None, None) I0422 19:18:43.676529 139074349336384 maxtext_utils.py:1620] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: PartitionSpec('norm', 'layers') Physical: (None, None) I0422 19:18:43.676573 139074349336384 maxtext_utils.py:1620] params/params/decoder/layers/self_attention/key/kernel Shape: float32[2048,16,16,128] Logical: PartitionSpec('embed', 'layers', 'kv_heads', 'kv_head_dim') Physical: ('fsdp', None, None, None) I0422 19:18:43.676618 139074349336384 maxtext_utils.py:1620] params/params/decoder/layers/self_attention/out/kernel Shape: float32[16,16,128,2048] Logical: PartitionSpec('heads', 'layers', 'kv', 'embed') Physical: (None, None, None, 'fsdp') I0422 19:18:43.676652 139074349336384 maxtext_utils.py:1620] params/params/decoder/layers/self_attention/query/kernel Shape: float32[2048,16,16,128] Logical: PartitionSpec('embed', 'layers', 'q_heads', 'kv') Physical: ('fsdp', None, None, None) I0422 19:18:43.676684 139074349336384 maxtext_utils.py:1620] params/params/decoder/layers/self_attention/value/kernel Shape: float32[2048,16,16,128] Logical: PartitionSpec('embed', 'layers', 'kv_heads', 'kv_head_dim') Physical: ('fsdp', None, None, None) I0422 19:18:43.676732 139074349336384 maxtext_utils.py:1620] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: PartitionSpec('embed', 'vocab') Physical: ('fsdp', None) I0422 19:18:43.676777 139074349336384 maxtext_utils.py:1620] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: PartitionSpec('vocab', 'embed') Physical: (None, 'fsdp') I0422 19:18:45.447896 139074349336384 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0422 19:18:45.447989 139074349336384 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0422 19:18:45.463066 139074349336384 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0422 19:18:45.463139 139074349336384 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0422 19:18:58.654033 139074349336384 max_utils.py:791] Total memory size: 1.5 GB, Output size: 0.4 GB, Temp size: 1.1 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB. I0422 19:18:58.655008 139074349336384 metric_logger.py:289] number parameters: 1.105 billion I0422 19:19:13.608346 139074349336384 checkpointing.py:772] Waiting for step 0 to finish before checkpoint... I0422 19:19:13.782468 139074349336384 checkpointing.py:776] Waited 0.1741018295288086 seconds for step 0 to finish before starting checkpointing. I0422 19:19:13.785269 139074349336384 checkpoint_manager.py:2013] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0422 19:19:13.787064 139074349336384 checkpoint_manager.py:1518] [process=6] Saving checkpoint at step 0 I0422 19:19:13.790017 139074349336384 async_checkpointer.py:452] [process=6] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741_05_fp8/checkpoints/0. I0422 19:19:14.819473 139074349336384 signaling_client.py:364] Using JaxDistributedSignalingClient I0422 19:19:14.820548 139074349336384 jax_array_handlers.py:358] Scheduling D2H of 81 prioritized jax.Array. I0422 19:19:14.820613 139074349336384 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0422 19:19:15.185628 139074349336384 base_pytree_checkpoint_handler.py:153] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.366280s I0422 19:19:15.185801 139074349336384 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/blocking_gbytes_per_sec: 1.447 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 1.0662360191345215 s) (per-host) I0422 19:19:15.185855 139074349336384 base_pytree_checkpoint_handler.py:737] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 1.066299s (batch_requests_ready=0.694691s, total_serialization_initiated=0.371536s, others=0.000072s) I0422 19:19:15.185961 139074349336384 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.070343s (all_items=0.000020s, per_item={'items': '0.00001979'}, temp_paths=1.070323) I0422 19:19:15.186901 138954263226112 async_checkpointer.py:79] [process=6][thread=async_save] Background save thread started. I0422 19:19:15.187071 139074349336384 async_checkpointer.py:561] Finished blocking save. Time taken: 1.399916s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741_05_fp8/checkpoints/0. I0422 19:19:15.189061 139074349336384 checkpoint_manager.py:1566] [process=6][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0422 19:19:15.189356 138947787204352 async_checkpointer.py:265] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0422 19:19:15.189511 139074349336384 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776885553.7852376, 'wait_for_prev_duration_secs': 0.00012183189392089844, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776885553.7871232, 'checkpointer_blocking_duration_secs': 1.40006685256958, 'get_old_steps_start_time': 1776885555.1872108, 'get_old_steps_duration_secs': 2.6941299438476562e-05, 'checkpoint_manager_blocking_start_time': 1776885553.7832584, 'checkpoint_manager_blocking_duration_secs': 1.4062132835388184} I0422 19:19:15.189626 139074349336384 checkpointing.py:408] Started an asynchronous checkpoint save for step 0 I0422 19:19:15.189678 139074349336384 max_utils.py:750] Memstats: After params initialized: I0422 19:19:15.189728 139074349336384 max_utils.py:756] Using (GB) 0.45 / 31.25 (1.440000%) on TPU_24(process=6,(0,6,0,0)) I0422 19:19:15.189763 139074349336384 max_utils.py:756] Using (GB) 0.45 / 31.25 (1.440000%) on TPU_25(process=6,(1,6,0,0)) I0422 19:19:15.189792 139074349336384 max_utils.py:756] Using (GB) 0.45 / 31.25 (1.440000%) on TPU_28(process=6,(0,7,0,0)) I0422 19:19:15.189818 139074349336384 max_utils.py:756] Using (GB) 0.45 / 31.25 (1.440000%) on TPU_29(process=6,(1,7,0,0)) I0422 19:19:15.465280 139074349336384 metric_logger.py:185] completed step: 0, seconds: 14.953, TFLOP/s/device: 0.909, Tokens/s/device: 136.960, total_weights: 65536, loss: 10.874 I0422 19:19:15.637415 139074349336384 metric_logger.py:185] completed step: 1, seconds: 1.855, TFLOP/s/device: 7.325, Tokens/s/device: 1104.111, total_weights: 65536, loss: 10.874 I0422 19:19:16.074402 139074349336384 metric_logger.py:185] completed step: 2, seconds: 0.015, TFLOP/s/device: 929.479, Tokens/s/device: 140101.245, total_weights: 65536, loss: 10.816 I0422 19:19:16.232827 139074349336384 metric_logger.py:185] completed step: 3, seconds: 0.438, TFLOP/s/device: 31.048, Tokens/s/device: 4679.945, total_weights: 65536, loss: 10.431 I0422 19:19:16.550007 139074349336384 metric_logger.py:185] completed step: 4, seconds: 0.164, TFLOP/s/device: 82.778, Tokens/s/device: 12477.154, total_weights: 65536, loss: 9.992 I0422 19:19:16.556432 139074349336384 metric_logger.py:185] completed step: 5, seconds: 0.158, TFLOP/s/device: 85.936, Tokens/s/device: 12953.171, total_weights: 65536, loss: 9.549 I0422 19:19:36.655489 139074349336384 metric_logger.py:185] completed step: 6, seconds: 0.318, TFLOP/s/device: 42.779, Tokens/s/device: 6448.058, total_weights: 65536, loss: 9.111 I0422 19:19:36.813849 139074349336384 metric_logger.py:185] completed step: 7, seconds: 19.942, TFLOP/s/device: 0.681, Tokens/s/device: 102.697, total_weights: 65536, loss: 8.685 I0422 19:19:36.971922 139074349336384 metric_logger.py:185] completed step: 8, seconds: 0.163, TFLOP/s/device: 83.353, Tokens/s/device: 12563.801, total_weights: 65536, loss: 8.281 I0422 19:19:36.976939 139074349336384 checkpointing.py:772] Waiting for step 10 to finish before checkpoint... I0422 19:19:37.288321 139074349336384 checkpointing.py:776] Waited 0.31134581565856934 seconds for step 10 to finish before starting checkpointing. I0422 19:19:37.291078 139074349336384 checkpoint_manager.py:2024] [process=6][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0422 19:19:38.154925 2715 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0422 19:19:40.966204 138954271618816 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 81 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741_05_fp8/checkpoints/0/items/array_metadatas/process_6 I0422 19:19:54.666162 138954263226112 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/gbytes_per_sec: 38.962 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 40.5465362071991 s) (per-host) I0422 19:19:54.666282 138954263226112 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 39.479272s. I0422 19:20:02.306082 138954263226112 async_checkpointer.py:144] [process=6][thread=async_save] Background save thread done. Time taken: 47.119056s. I0422 19:20:02.306390 138947787204352 async_checkpointer.py:273] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0422 19:20:02.306520 138947787204352 async_checkpointer.py:283] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0422 19:20:02.306571 138947787204352 checkpoint_manager.py:2133] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0422 19:20:02.308447 138947787204352 checkpoint_manager.py:2142] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0422 19:20:02.308644 139074349336384 checkpoint_manager.py:2036] [process=6][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0. W0422 19:20:02.308777 139074349336384 checkpoint_manager.py:1458] Waiting for previous save to complete took 25.017704 seconds. If this number is high, consider checkpointing less frequently. I0422 19:20:02.310679 139074349336384 checkpoint_manager.py:1518] [process=6] Saving checkpoint at step 10 I0422 19:20:02.314284 139074349336384 async_checkpointer.py:452] [process=6] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741_05_fp8/checkpoints/10. I0422 19:20:03.598273 139074349336384 jax_array_handlers.py:358] Scheduling D2H of 81 prioritized jax.Array. I0422 19:20:03.598370 139074349336384 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0422 19:20:03.654314 139074349336384 base_pytree_checkpoint_handler.py:153] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.057253s I0422 19:20:03.654478 139074349336384 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.492 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.6191508769989014 s) (per-host) I0422 19:20:03.654535 139074349336384 base_pytree_checkpoint_handler.py:737] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.619216s (batch_requests_ready=0.558415s, total_serialization_initiated=0.060726s, others=0.000075s) I0422 19:20:03.654637 139074349336384 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.623409s (all_items=0.000015s, per_item={'items': '0.00001526'}, temp_paths=0.623393) I0422 19:20:03.655555 138946699691776 async_checkpointer.py:79] [process=6][thread=async_save] Background save thread started. I0422 19:20:03.655714 139074349336384 async_checkpointer.py:561] Finished blocking save. Time taken: 1.344964s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741_05_fp8/checkpoints/10. I0422 19:20:03.786870 139074349336384 checkpoint_manager.py:1566] [process=6][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize I0422 19:20:03.787259 138947787204352 async_checkpointer.py:265] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0422 19:20:03.787434 139074349336384 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776885577.2910511, 'wait_for_prev_duration_secs': 25.017703533172607, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776885602.310718, 'checkpointer_blocking_duration_secs': 1.3451042175292969, 'get_old_steps_start_time': 1776885603.655841, 'get_old_steps_duration_secs': 2.574920654296875e-05, 'checkpoint_manager_blocking_start_time': 1776885577.2892582, 'checkpoint_manager_blocking_duration_secs': 26.498137712478638} I0422 19:20:03.787548 139074349336384 checkpointing.py:408] Started an asynchronous checkpoint save for step 10 I0422 19:20:03.788021 139074349336384 metric_logger.py:185] completed step: 9, seconds: 0.159, TFLOP/s/device: 85.695, Tokens/s/device: 12916.898, total_weights: 65536, loss: 7.908 I0422 19:20:03.795117 139074349336384 metric_logger.py:185] completed step: 10, seconds: 0.158, TFLOP/s/device: 86.148, Tokens/s/device: 12985.119, total_weights: 65536, loss: 7.568 I0422 19:20:03.953045 139074349336384 metric_logger.py:185] completed step: 11, seconds: 26.816, TFLOP/s/device: 0.507, Tokens/s/device: 76.372, total_weights: 65536, loss: 7.288 I0422 19:20:04.111073 139074349336384 metric_logger.py:185] completed step: 12, seconds: 0.006, TFLOP/s/device: 2313.097, Tokens/s/device: 348655.090, total_weights: 65536, loss: 7.032 I0422 19:20:04.269458 139074349336384 metric_logger.py:185] completed step: 13, seconds: 0.159, TFLOP/s/device: 85.358, Tokens/s/device: 12866.100, total_weights: 65536, loss: 6.815 I0422 19:20:04.427425 139074349336384 metric_logger.py:185] completed step: 14, seconds: 0.158, TFLOP/s/device: 85.925, Tokens/s/device: 12951.615, total_weights: 65536, loss: 6.635 I0422 19:20:04.585612 139074349336384 metric_logger.py:185] completed step: 15, seconds: 0.158, TFLOP/s/device: 85.923, Tokens/s/device: 12951.287, total_weights: 65536, loss: 6.492 I0422 19:20:04.743882 139074349336384 metric_logger.py:185] completed step: 16, seconds: 0.158, TFLOP/s/device: 85.892, Tokens/s/device: 12946.620, total_weights: 65536, loss: 6.380 I0422 19:20:04.901820 139074349336384 metric_logger.py:185] completed step: 17, seconds: 0.158, TFLOP/s/device: 85.968, Tokens/s/device: 12958.007, total_weights: 65536, loss: 6.293 I0422 19:20:05.060044 139074349336384 metric_logger.py:185] completed step: 18, seconds: 0.158, TFLOP/s/device: 85.909, Tokens/s/device: 12949.158, total_weights: 65536, loss: 6.223 I0422 19:20:05.217931 139074349336384 checkpointing.py:772] Waiting for step 19 to finish before checkpoint... I0422 19:20:05.218982 139074349336384 checkpointing.py:776] Waited 0.0010700225830078125 seconds for step 19 to finish before starting checkpointing. I0422 19:20:05.220914 139074349336384 checkpoint_manager.py:2024] [process=6][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0422 19:20:08.547747 138945681684224 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 81 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741_05_fp8/checkpoints/10/items/array_metadatas/process_6 I0422 19:20:45.743437 138946699691776 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/gbytes_per_sec: 36.990 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.70806837081909 s) (per-host) I0422 19:20:45.743556 138946699691776 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.087888s. I0422 19:20:52.267305 138946699691776 async_checkpointer.py:144] [process=6][thread=async_save] Background save thread done. Time taken: 48.611622s. I0422 19:20:52.267582 138947787204352 async_checkpointer.py:273] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0422 19:20:52.267700 138947787204352 async_checkpointer.py:283] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0422 19:20:52.267747 138947787204352 checkpoint_manager.py:2133] [process=6][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts... I0422 19:20:52.269163 138947787204352 checkpoint_manager.py:2142] [process=6][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts. I0422 19:20:52.269346 139074349336384 checkpoint_manager.py:2036] [process=6][thread=MainThread][step=10][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=10. W0422 19:20:52.269467 139074349336384 checkpoint_manager.py:1458] Waiting for previous save to complete took 47.048564 seconds. If this number is high, consider checkpointing less frequently. I0422 19:20:52.270990 139074349336384 checkpoint_manager.py:1518] [process=6] Saving checkpoint at step 19 I0422 19:20:52.274363 139074349336384 async_checkpointer.py:452] [process=6] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741_05_fp8/checkpoints/19. I0422 19:20:52.819375 139074349336384 jax_array_handlers.py:358] Scheduling D2H of 81 prioritized jax.Array. I0422 19:20:52.819472 139074349336384 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0422 19:20:52.875992 139074349336384 base_pytree_checkpoint_handler.py:153] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.057751s I0422 19:20:52.876174 139074349336384 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/blocking_gbytes_per_sec: 5.021 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.30722951889038086 s) (per-host) I0422 19:20:52.876225 139074349336384 base_pytree_checkpoint_handler.py:737] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.307293s (batch_requests_ready=0.246022s, total_serialization_initiated=0.061202s, others=0.000069s) I0422 19:20:52.876329 139074349336384 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.311394s (all_items=0.000012s, per_item={'items': '0.00001216'}, temp_paths=0.311382) I0422 19:20:52.877205 138954271618816 async_checkpointer.py:79] [process=6][thread=async_save] Background save thread started. I0422 19:20:52.877359 139074349336384 async_checkpointer.py:561] Finished blocking save. Time taken: 0.606301s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741_05_fp8/checkpoints/19. I0422 19:20:53.334306 139074349336384 checkpoint_manager.py:1566] [process=6][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize I0422 19:20:53.334676 138947787204352 async_checkpointer.py:265] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0422 19:20:53.334847 139074349336384 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776885605.220888, 'wait_for_prev_duration_secs': 47.048564195632935, 'time_between_consecutive_saves_sec': 2.912400960922241, 'checkpointer_blocking_start_time': 1776885652.271029, 'checkpointer_blocking_duration_secs': 0.6064348220825195, 'get_old_steps_start_time': 1776885652.8774776, 'get_old_steps_duration_secs': 2.1696090698242188e-05, 'checkpoint_manager_blocking_start_time': 1776885605.2192736, 'checkpoint_manager_blocking_duration_secs': 48.11553931236267} I0422 19:20:53.334987 139074349336384 checkpointing.py:408] Started an asynchronous checkpoint save for step 19 I0422 19:20:53.335031 139074349336384 checkpoint_manager.py:2024] [process=6][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0422 19:20:58.817982 138945642735360 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 81 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741/linen_xpk_feat_Migrate_Decoder_And_Tests_to_NNX_20260422_190741_05_fp8/checkpoints/19/items/array_metadatas/process_6 I0422 19:21:35.078788 138954271618816 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/gbytes_per_sec: 37.162 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.509795904159546 s) (per-host) I0422 19:21:35.078911 138954271618816 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.201595s. I0422 19:21:43.091891 138954271618816 async_checkpointer.py:144] [process=6][thread=async_save] Background save thread done. Time taken: 50.214562s. I0422 19:21:43.092196 138947787204352 async_checkpointer.py:273] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0422 19:21:43.092316 138947787204352 async_checkpointer.py:283] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0422 19:21:43.092358 138947787204352 checkpoint_manager.py:2133] [process=6][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts... I0422 19:21:43.093923 138947787204352 checkpoint_manager.py:2142] [process=6][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts. I0422 19:21:43.094116 139074349336384 checkpoint_manager.py:2036] [process=6][thread=MainThread][step=19][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=19. I0422 19:21:43.094256 139074349336384 checkpoint_manager.py:2013] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0422 19:21:43.095005 139074349336384 metric_logger.py:185] completed step: 19, seconds: 0.158, TFLOP/s/device: 85.963, Tokens/s/device: 12957.269, total_weights: 65536, loss: 6.167 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Wed Apr 22 19:21:53 UTC 2026 EXIT_CODE=0