main (574ad3fb9) vs test/pipeline-scan-nnx (e27fc1e97)| Metric | main 574ad3fb9 | test/pipeline-scan-nnx e27fc1e97 | Diff (test/pipeline-scan-nnx − main) |
|---|---|---|---|
| Parameters | 1.105 billion | 1.105 billion | — |
| Final loss | 6.1670 | 6.1670 | 0 |
| TFLOP/s | 85.720 | 85.906 | +0.186 |
| Tok/s | 12920.6 | 12948.7 | +28.102 |
| Avg s/step | 1.633 | 2.747 | +1.114 |
| 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: Mon Apr 20 06:13:39 UTC 2026 PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used. 2026-04-20 06:14:03.882403: 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) I0420 06:14:04.416744 140037021194048 max_utils.py:273] Attempting to initialize the jax distributed system... I0420 06:14:13.456727 140037021194048 distributed.py:149] Starting JAX distributed service on [::]:8482 I0420 06:14:13.459094 140037021194048 distributed.py:172] Connecting to JAX distributed service on mt-05-fp8-2sk9q-slice-job-0-0.mt-05-fp8-2sk9q:8482 I0420 06:14:15.161294 140037021194048 max_utils.py:284] Jax distributed system initialized! I0420 06:14:21.294174 140037021194048 max_utils.py:800] System Information: Jax Version: 0.9.2 I0420 06:14:21.294277 140037021194048 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0420 06:14:21.294317 140037021194048 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 I0420 06:14:21.294351 140037021194048 train_utils.py:348] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0420 06:14:21.993407 140037021194048 maxtext_utils.py:1551] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0420 06:14:21.993689 140037021194048 checkpointing.py:677] Setting up checkpoint logger... I0420 06:14:21.993742 140037021194048 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True I0420 06:14:21.993786 140037021194048 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0420 06:14:21.994133 140037021194048 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 0x7f5c52bb1520>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0420 06:14:25.010873 140037021194048 checkpointing.py:265] Enabling policy for fixed interval checkpointing. I0420 06:14:25.011113 140037021194048 checkpoint_manager.py:708] [process=2][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7f47f43773e0>}, handler_registry=None I0420 06:14:25.011356 140037021194048 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7f47f43773e0>` 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`. I0420 06:14:25.011408 140037021194048 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7f47f4378a10>` 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`. I0420 06:14:25.011445 140037021194048 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 0x7f47f43773e0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7f47f43773e0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7f47f4378a10>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7f47f4378a10>}). I0420 06:14:25.011762 140037021194048 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0420 06:14:25.011832 140037021194048 async_checkpointer.py:192] [process=2][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7f46ec687740> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0420 06:14:25.786688 140037021194048 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260420_060028/linen_xpk_main_20260420_060028_05_fp8/checkpoints I0420 06:14:26.203381 140037021194048 checkpoint_manager.py:929] [process=2][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_20260420_060028/linen_xpk_main_20260420_060028_05_fp8/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7f47f4376c00> I0420 06:14:26.203548 140037021194048 checkpointing.py:301] Checkpoint manager created! I0420 06:14:27.278738 140037021194048 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0420 06:14:27.278853 140037021194048 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0420 06:14:27.666759 140037021194048 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0420 06:14:27.666848 140037021194048 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0420 06:14:27.683507 140037021194048 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0420 06:14:27.683566 140037021194048 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0420 06:14:27.735884 140037021194048 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0420 06:14:27.735962 140037021194048 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0420 06:14:27.752640 140037021194048 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0420 06:14:27.752699 140037021194048 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0420 06:14:27.769283 140037021194048 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0420 06:14:27.769342 140037021194048 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0420 06:14:27.794201 140037021194048 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0420 06:14:27.794271 140037021194048 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0420 06:14:27.845529 140037021194048 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0420 06:14:27.845605 140037021194048 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0420 06:14:28.285381 140037021194048 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint I0420 06:14:28.285491 140037021194048 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0420 06:14:30.204820 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0420 06:14:30.204937 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: P() Physical: () I0420 06:14:30.204985 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0420 06:14:30.205049 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: P() Physical: () I0420 06:14:30.205097 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0420 06:14:30.205136 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: P() Physical: () I0420 06:14:30.205168 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0420 06:14:30.205199 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: P() Physical: () I0420 06:14:30.205229 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0420 06:14:30.205258 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: P() Physical: () I0420 06:14:30.205287 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0420 06:14:30.205318 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: P() Physical: () I0420 06:14:30.205347 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0420 06:14:30.205375 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: P() Physical: () I0420 06:14:30.205403 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0420 06:14:30.205430 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: P() Physical: () I0420 06:14:30.205459 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0420 06:14:30.205488 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: P() Physical: () I0420 06:14:30.205516 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0420 06:14:30.205544 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: P() Physical: () I0420 06:14:30.205572 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0420 06:14:30.205599 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: P() Physical: () I0420 06:14:30.205626 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0420 06:14:30.205653 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: P() Physical: () I0420 06:14:30.205680 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0420 06:14:30.205707 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: P() Physical: () I0420 06:14:30.205734 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0420 06:14:30.205761 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: P() Physical: () I0420 06:14:30.205787 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0420 06:14:30.205814 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: P() Physical: () I0420 06:14:30.205840 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0420 06:14:30.205866 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: P() Physical: () I0420 06:14:30.205892 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0420 06:14:30.205919 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: P() Physical: () I0420 06:14:30.205945 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0420 06:14:30.205971 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: P() Physical: () I0420 06:14:30.205997 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0420 06:14:30.206054 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: P() Physical: () I0420 06:14:30.206087 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0420 06:14:30.206119 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: P() Physical: () I0420 06:14:30.206146 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0420 06:14:30.206175 140037021194048 maxtext_utils.py:1654] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: P() Physical: () I0420 06:14:30.206225 140037021194048 maxtext_utils.py:1654] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0420 06:14:30.206278 140037021194048 maxtext_utils.py:1654] params/params/decoder/layers/mlp/wi_0/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0420 06:14:30.206315 140037021194048 maxtext_utils.py:1654] params/params/decoder/layers/mlp/wi_1/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0420 06:14:30.206361 140037021194048 maxtext_utils.py:1654] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: P('mlp', 'layers', 'embed') Physical: (None, None, 'fsdp') I0420 06:14:30.206406 140037021194048 maxtext_utils.py:1654] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0420 06:14:30.206438 140037021194048 maxtext_utils.py:1654] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0420 06:14:30.206484 140037021194048 maxtext_utils.py:1654] 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) I0420 06:14:30.206529 140037021194048 maxtext_utils.py:1654] 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') I0420 06:14:30.206564 140037021194048 maxtext_utils.py:1654] 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) I0420 06:14:30.206596 140037021194048 maxtext_utils.py:1654] 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) I0420 06:14:30.206640 140037021194048 maxtext_utils.py:1654] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0420 06:14:30.206683 140037021194048 maxtext_utils.py:1654] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0420 06:14:31.839607 140037021194048 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0420 06:14:31.839704 140037021194048 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0420 06:14:31.855167 140037021194048 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0420 06:14:31.855230 140037021194048 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0420 06:14:45.589514 140037021194048 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. I0420 06:14:45.590441 140037021194048 metric_logger.py:301] number parameters: 1.105 billion I0420 06:15:00.658443 140037021194048 checkpointing.py:772] Waiting for step 0 to finish before checkpoint... I0420 06:15:00.829529 140037021194048 checkpointing.py:776] Waited 0.17106914520263672 seconds for step 0 to finish before starting checkpointing. I0420 06:15:00.831979 140037021194048 checkpoint_manager.py:2009] [process=2][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0420 06:15:00.833924 140037021194048 checkpoint_manager.py:1512] [process=2] Saving checkpoint at step 0 I0420 06:15:00.835392 140037021194048 event_tracking.py:70] [process=2] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260420_060028/linen_xpk_main_20260420_060028_05_fp8/checkpoints/0. I0420 06:15:01.625127 140037021194048 signaling_client.py:364] Using JaxDistributedSignalingClient I0420 06:15:01.626078 140037021194048 jax_array_handlers.py:360] Scheduling D2H of 81 prioritized jax.Array. I0420 06:15:01.626137 140037021194048 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 I0420 06:15:02.052099 140037021194048 base_pytree_checkpoint_handler.py:154] [process=2][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.427112s I0420 06:15:02.052274 140037021194048 base_pytree_checkpoint_handler.py:130] [process=2] /jax/orbax/write/blocking_gbytes_per_sec: 3.541 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.435657262802124 s) (per-host) I0420 06:15:02.052325 140037021194048 base_pytree_checkpoint_handler.py:768] [process=2][thread=MainThread] Initiated Pytree async_save. Time taken: 0.435719s (batch_requests_ready=0.003662s, total_serialization_initiated=0.431988s, others=0.000069s) I0420 06:15:02.052433 140037021194048 composite_checkpoint_handler.py:715] [process=2][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.439816s (all_items=0.000017s, per_item={'items': '0.00001669'}, temp_paths=0.439799) I0420 06:15:02.053315 140037021194048 event_tracking.py:125] [process=2] [async] Finished blocking save in 1.22 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260420_060028/linen_xpk_main_20260420_060028_05_fp8/checkpoints/0. I0420 06:15:02.053607 139907302815488 async_checkpointer.py:76] [process=2][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-20 06:35:02.053581 I0420 06:15:02.055664 140037021194048 checkpoint_manager.py:1560] [process=2][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0420 06:15:02.055979 139906814834432 async_checkpointer.py:280] [process=2][thread=save_finalize] Waiting for background save thread=async_save. I0420 06:15:02.056122 140037021194048 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260420_060028/linen_xpk_main_20260420_060028_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776665700.8319607, 'wait_for_prev_duration_secs': 7.390975952148438e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776665700.8339627, 'checkpointer_blocking_duration_secs': 1.2197585105895996, 'get_old_steps_start_time': 1776665702.0537472, 'get_old_steps_duration_secs': 3.1948089599609375e-05, 'checkpoint_manager_blocking_start_time': 1776665700.8301563, 'checkpoint_manager_blocking_duration_secs': 1.2259268760681152} I0420 06:15:02.056288 140037021194048 checkpointing.py:408] Started an asynchronous checkpoint save for step 0 I0420 06:15:02.056339 140037021194048 max_utils.py:750] Memstats: After params initialized: I0420 06:15:02.056388 140037021194048 max_utils.py:756] Using (GB) 0.45 / 31.25 (1.440000%) on TPU_8(process=2,(0,2,0,0)) I0420 06:15:02.056422 140037021194048 max_utils.py:756] Using (GB) 0.45 / 31.25 (1.440000%) on TPU_9(process=2,(1,2,0,0)) I0420 06:15:02.056448 140037021194048 max_utils.py:756] Using (GB) 0.45 / 31.25 (1.440000%) on TPU_12(process=2,(0,3,0,0)) I0420 06:15:02.056472 140037021194048 max_utils.py:756] Using (GB) 0.45 / 31.25 (1.440000%) on TPU_13(process=2,(1,3,0,0)) I0420 06:15:02.368779 140037021194048 metric_logger.py:196] completed step: 0, seconds: 15.068, TFLOP/s/device: 0.902, Tokens/s/device: 135.918, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52776.805 I0420 06:15:02.570897 140037021194048 metric_logger.py:196] completed step: 1, seconds: 1.708, TFLOP/s/device: 7.954, Tokens/s/device: 1198.894, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52761.840 I0420 06:15:03.016955 140037021194048 metric_logger.py:196] completed step: 2, seconds: 0.045, TFLOP/s/device: 302.582, Tokens/s/device: 45608.409, total_weights: 65536, loss: 10.816, lm_loss: 10.816, perplexity: 49832.398 I0420 06:15:03.175469 140037021194048 metric_logger.py:196] completed step: 3, seconds: 0.446, TFLOP/s/device: 30.445, Tokens/s/device: 4589.027, total_weights: 65536, loss: 10.431, lm_loss: 10.431, perplexity: 33901.820 I0420 06:15:03.493142 140037021194048 metric_logger.py:196] completed step: 4, seconds: 0.164, TFLOP/s/device: 82.674, Tokens/s/device: 12461.590, total_weights: 65536, loss: 9.992, lm_loss: 9.992, perplexity: 21847.639 I0420 06:15:03.499568 140037021194048 metric_logger.py:196] completed step: 5, seconds: 0.158, TFLOP/s/device: 86.022, Tokens/s/device: 12966.211, total_weights: 65536, loss: 9.549, lm_loss: 9.549, perplexity: 14035.006 I0420 06:15:04.866975 2851 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0420 06:15:07.250153 139912156043008 array_metadata_store.py:203] [process=2][thread=array_type_handler] Wrote 81 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260420_060028/linen_xpk_main_20260420_060028_05_fp8/checkpoints/0/items/array_metadatas/process_2 I0420 06:15:21.943785 139907302815488 base_pytree_checkpoint_handler.py:130] [process=2] /jax/orbax/write/gbytes_per_sec: 77.717 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 20.32711935043335 s) (per-host) I0420 06:15:21.943903 139907302815488 async_checkpointer.py:90] [process=2][thread=async_save] 3 Handler Commit operations completed. Time taken: 19.890217s. I0420 06:15:28.028983 140037021194048 metric_logger.py:196] completed step: 6, seconds: 0.318, TFLOP/s/device: 42.718, Tokens/s/device: 6438.976, total_weights: 65536, loss: 9.111, lm_loss: 9.111, perplexity: 9058.688 I0420 06:15:28.187443 140037021194048 metric_logger.py:196] completed step: 7, seconds: 24.371, TFLOP/s/device: 0.558, Tokens/s/device: 84.036, total_weights: 65536, loss: 8.685, lm_loss: 8.685, perplexity: 5914.720 I0420 06:15:28.345853 140037021194048 metric_logger.py:196] completed step: 8, seconds: 0.165, TFLOP/s/device: 82.328, Tokens/s/device: 12409.414, total_weights: 65536, loss: 8.281, lm_loss: 8.281, perplexity: 3950.010 I0420 06:15:28.350981 140037021194048 checkpointing.py:772] Waiting for step 10 to finish before checkpoint... I0420 06:15:28.662614 140037021194048 checkpointing.py:776] Waited 0.3115963935852051 seconds for step 10 to finish before starting checkpointing. I0420 06:15:28.665349 140037021194048 checkpoint_manager.py:2020] [process=2][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0420 06:15:29.798048 139907302815488 async_checkpointer.py:160] [process=2][thread=async_save] Background save thread done. Time taken: 27.744323s. I0420 06:15:29.798338 139906814834432 async_checkpointer.py:288] [process=2][thread=save_finalize] Done with waiting for background save thread=async_save. I0420 06:15:29.798454 139906814834432 async_checkpointer.py:298] [process=2][thread=save_finalize] No errors found in background save thread=async_save. I0420 06:15:29.798504 139906814834432 checkpoint_manager.py:2137] [process=2][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0420 06:15:29.799930 139906814834432 checkpoint_manager.py:2146] [process=2][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0420 06:15:29.800114 140037021194048 checkpoint_manager.py:2032] [process=2][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0. W0420 06:15:29.800262 140037021194048 checkpoint_manager.py:1452] Waiting for previous save to complete took 1.134912 seconds. If this number is high, consider checkpointing less frequently. I0420 06:15:29.801921 140037021194048 checkpoint_manager.py:1512] [process=2] Saving checkpoint at step 10 I0420 06:15:29.804118 140037021194048 event_tracking.py:70] [process=2] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260420_060028/linen_xpk_main_20260420_060028_05_fp8/checkpoints/10. I0420 06:15:30.097207 140037021194048 jax_array_handlers.py:360] Scheduling D2H of 81 prioritized jax.Array. I0420 06:15:30.097298 140037021194048 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 I0420 06:15:30.133331 140037021194048 base_pytree_checkpoint_handler.py:154] [process=2][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.037198s I0420 06:15:30.133498 140037021194048 base_pytree_checkpoint_handler.py:130] [process=2] /jax/orbax/write/blocking_gbytes_per_sec: 35.583 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04335618019104004 s) (per-host) I0420 06:15:30.133548 140037021194048 base_pytree_checkpoint_handler.py:768] [process=2][thread=MainThread] Initiated Pytree async_save. Time taken: 0.043416s (batch_requests_ready=0.003028s, total_serialization_initiated=0.040322s, others=0.000066s) I0420 06:15:30.133652 140037021194048 composite_checkpoint_handler.py:715] [process=2][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.047442s (all_items=0.000015s, per_item={'items': '0.00001502'}, temp_paths=0.047427) I0420 06:15:30.134229 140037021194048 event_tracking.py:125] [process=2] [async] Finished blocking save in 0.33 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260420_060028/linen_xpk_main_20260420_060028_05_fp8/checkpoints/10. I0420 06:15:30.134478 139906814834432 async_checkpointer.py:76] [process=2][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-20 06:35:30.134454 I0420 06:15:30.139755 140037021194048 checkpoint_manager.py:1560] [process=2][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize I0420 06:15:30.139975 139904113694464 async_checkpointer.py:280] [process=2][thread=save_finalize] Waiting for background save thread=async_save. I0420 06:15:30.140088 140037021194048 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260420_060028/linen_xpk_main_20260420_060028_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776665728.6653187, 'wait_for_prev_duration_secs': 1.1349117755889893, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776665729.8019607, 'checkpointer_blocking_duration_secs': 0.33261919021606445, 'get_old_steps_start_time': 1776665730.1346004, 'get_old_steps_duration_secs': 2.574920654296875e-05, 'checkpoint_manager_blocking_start_time': 1776665728.6635242, 'checkpoint_manager_blocking_duration_secs': 1.4765315055847168} I0420 06:15:30.140248 140037021194048 checkpointing.py:408] Started an asynchronous checkpoint save for step 10 I0420 06:15:30.140841 140037021194048 metric_logger.py:196] completed step: 9, seconds: 0.158, TFLOP/s/device: 85.775, Tokens/s/device: 12928.966, total_weights: 65536, loss: 7.908, lm_loss: 7.908, perplexity: 2720.116 I0420 06:15:30.147691 140037021194048 metric_logger.py:196] completed step: 10, seconds: 0.159, TFLOP/s/device: 85.709, Tokens/s/device: 12918.935, total_weights: 65536, loss: 7.568, lm_loss: 7.568, perplexity: 1936.198 I0420 06:15:30.306720 140037021194048 metric_logger.py:196] completed step: 11, seconds: 1.795, TFLOP/s/device: 7.571, Tokens/s/device: 1141.162, total_weights: 65536, loss: 7.288, lm_loss: 7.288, perplexity: 1463.272 I0420 06:15:30.464992 140037021194048 metric_logger.py:196] completed step: 12, seconds: 0.006, TFLOP/s/device: 2243.581, Tokens/s/device: 338177.015, total_weights: 65536, loss: 7.032, lm_loss: 7.032, perplexity: 1132.061 I0420 06:15:31.043534 140037021194048 metric_logger.py:196] completed step: 13, seconds: 0.160, TFLOP/s/device: 84.922, Tokens/s/device: 12800.320, total_weights: 65536, loss: 6.815, lm_loss: 6.815, perplexity: 911.031 I0420 06:15:31.201839 140037021194048 metric_logger.py:196] completed step: 14, seconds: 0.574, TFLOP/s/device: 23.683, Tokens/s/device: 3569.798, total_weights: 65536, loss: 6.635, lm_loss: 6.635, perplexity: 761.080 I0420 06:15:31.360439 140037021194048 metric_logger.py:196] completed step: 15, seconds: 0.163, TFLOP/s/device: 83.252, Tokens/s/device: 12548.712, total_weights: 65536, loss: 6.492, lm_loss: 6.492, perplexity: 659.915 I0420 06:15:31.518600 140037021194048 metric_logger.py:196] completed step: 16, seconds: 0.158, TFLOP/s/device: 85.827, Tokens/s/device: 12936.725, total_weights: 65536, loss: 6.380, lm_loss: 6.380, perplexity: 589.948 I0420 06:15:31.676953 140037021194048 metric_logger.py:196] completed step: 17, seconds: 0.158, TFLOP/s/device: 85.731, Tokens/s/device: 12922.277, total_weights: 65536, loss: 6.293, lm_loss: 6.293, perplexity: 540.941 I0420 06:15:31.835141 140037021194048 metric_logger.py:196] completed step: 18, seconds: 0.158, TFLOP/s/device: 85.931, Tokens/s/device: 12952.434, total_weights: 65536, loss: 6.223, lm_loss: 6.223, perplexity: 504.108 I0420 06:15:31.992768 140037021194048 checkpointing.py:772] Waiting for step 19 to finish before checkpoint... I0420 06:15:31.993788 140037021194048 checkpointing.py:776] Waited 0.0010402202606201172 seconds for step 19 to finish before starting checkpointing. I0420 06:15:31.995893 140037021194048 checkpoint_manager.py:2020] [process=2][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0420 06:15:36.468224 139904658958080 array_metadata_store.py:203] [process=2][thread=array_type_handler] Wrote 81 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260420_060028/linen_xpk_main_20260420_060028_05_fp8/checkpoints/10/items/array_metadatas/process_2 I0420 06:16:11.290865 139906814834432 base_pytree_checkpoint_handler.py:130] [process=2] /jax/orbax/write/gbytes_per_sec: 38.343 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.20066976547241 s) (per-host) I0420 06:16:11.290987 139906814834432 async_checkpointer.py:90] [process=2][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.156429s. I0420 06:16:21.454650 139906814834432 async_checkpointer.py:160] [process=2][thread=async_save] Background save thread done. Time taken: 51.320077s. I0420 06:16:21.454880 139904113694464 async_checkpointer.py:288] [process=2][thread=save_finalize] Done with waiting for background save thread=async_save. I0420 06:16:21.454946 139904113694464 async_checkpointer.py:298] [process=2][thread=save_finalize] No errors found in background save thread=async_save. I0420 06:16:21.454995 139904113694464 checkpoint_manager.py:2137] [process=2][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts... I0420 06:16:21.456567 139904113694464 checkpoint_manager.py:2146] [process=2][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts. I0420 06:16:21.456797 140037021194048 checkpoint_manager.py:2032] [process=2][thread=MainThread][step=10][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=10. W0420 06:16:21.456935 140037021194048 checkpoint_manager.py:1452] Waiting for previous save to complete took 49.461046 seconds. If this number is high, consider checkpointing less frequently. I0420 06:16:21.458297 140037021194048 checkpoint_manager.py:1512] [process=2] Saving checkpoint at step 19 I0420 06:16:21.460462 140037021194048 event_tracking.py:70] [process=2] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260420_060028/linen_xpk_main_20260420_060028_05_fp8/checkpoints/19. I0420 06:16:21.754616 140037021194048 jax_array_handlers.py:360] Scheduling D2H of 81 prioritized jax.Array. I0420 06:16:21.754703 140037021194048 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 I0420 06:16:21.792761 140037021194048 base_pytree_checkpoint_handler.py:154] [process=2][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.039031s I0420 06:16:21.792926 140037021194048 base_pytree_checkpoint_handler.py:130] [process=2] /jax/orbax/write/blocking_gbytes_per_sec: 34.150 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.045174598693847656 s) (per-host) I0420 06:16:21.792976 140037021194048 base_pytree_checkpoint_handler.py:768] [process=2][thread=MainThread] Initiated Pytree async_save. Time taken: 0.045234s (batch_requests_ready=0.003015s, total_serialization_initiated=0.042155s, others=0.000064s) I0420 06:16:21.793107 140037021194048 composite_checkpoint_handler.py:715] [process=2][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.049412s (all_items=0.000012s, per_item={'items': '0.00001216'}, temp_paths=0.049400) I0420 06:16:21.793838 140037021194048 event_tracking.py:125] [process=2] [async] Finished blocking save in 0.34 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260420_060028/linen_xpk_main_20260420_060028_05_fp8/checkpoints/19. I0420 06:16:21.794126 139904113694464 async_checkpointer.py:76] [process=2][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-20 06:36:21.794093 I0420 06:16:21.797944 140037021194048 checkpoint_manager.py:1560] [process=2][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize I0420 06:16:21.798261 139907302815488 async_checkpointer.py:280] [process=2][thread=save_finalize] Waiting for background save thread=async_save. I0420 06:16:21.798426 140037021194048 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260420_060028/linen_xpk_main_20260420_060028_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776665731.995865, 'wait_for_prev_duration_secs': 49.46104574203491, 'time_between_consecutive_saves_sec': 2.195894956588745, 'checkpointer_blocking_start_time': 1776665781.4583354, 'checkpointer_blocking_duration_secs': 0.3359408378601074, 'get_old_steps_start_time': 1776665781.7942963, 'get_old_steps_duration_secs': 2.4080276489257812e-05, 'checkpoint_manager_blocking_start_time': 1776665731.994081, 'checkpoint_manager_blocking_duration_secs': 49.80431127548218} I0420 06:16:21.798557 140037021194048 checkpointing.py:408] Started an asynchronous checkpoint save for step 19 I0420 06:16:21.798599 140037021194048 checkpoint_manager.py:2020] [process=2][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0420 06:16:26.897582 139904658958080 array_metadata_store.py:203] [process=2][thread=array_type_handler] Wrote 81 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260420_060028/linen_xpk_main_20260420_060028_05_fp8/checkpoints/19/items/array_metadatas/process_2 I0420 06:17:03.216748 139904113694464 base_pytree_checkpoint_handler.py:130] [process=2] /jax/orbax/write/gbytes_per_sec: 38.095 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.46896767616272 s) (per-host) I0420 06:17:03.216854 139904113694464 async_checkpointer.py:90] [process=2][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.422607s. I0420 06:17:12.819980 139904113694464 async_checkpointer.py:160] [process=2][thread=async_save] Background save thread done. Time taken: 51.025716s. I0420 06:17:12.820342 139907302815488 async_checkpointer.py:288] [process=2][thread=save_finalize] Done with waiting for background save thread=async_save. I0420 06:17:12.820502 139907302815488 async_checkpointer.py:298] [process=2][thread=save_finalize] No errors found in background save thread=async_save. I0420 06:17:12.820544 139907302815488 checkpoint_manager.py:2137] [process=2][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts... I0420 06:17:12.821902 139907302815488 checkpoint_manager.py:2146] [process=2][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts. I0420 06:17:12.822093 140037021194048 checkpoint_manager.py:2032] [process=2][thread=MainThread][step=19][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=19. I0420 06:17:12.822251 140037021194048 checkpoint_manager.py:2009] [process=2][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0420 06:17:12.823183 140037021194048 metric_logger.py:196] completed step: 19, seconds: 0.159, TFLOP/s/device: 85.720, Tokens/s/device: 12920.647, 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: Mon Apr 20 06:17:25 UTC 2026 EXIT_CODE=0
XPK Start: Tue Apr 21 01:03:48 UTC 2026 2026-04-21 01:03:52.293074: 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 00:00:1776733432.305495 10 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered E0000 00:00:1776733432.309271 10 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered W0000 00:00:1776733432.320629 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776733432.320648 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776733432.320650 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776733432.320652 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. 2026-04-21 01:04:11.417390: 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) I0421 01:04:11.925359 134491761944384 max_utils.py:273] Attempting to initialize the jax distributed system... INFO:2026-04-21 01:04:20,965:jax._src.distributed:140: Starting JAX distributed service on [::]:8482 I0421 01:04:20.965377 134491761944384 distributed.py:140] Starting JAX distributed service on [::]:8482 INFO:2026-04-21 01:04:20,967:jax._src.distributed:157: Connecting to JAX distributed service on mt-05-fp8-kwmgs-slice-job-0-0.mt-05-fp8-kwmgs:8482 I0421 01:04:20.967814 134491761944384 distributed.py:157] Connecting to JAX distributed service on mt-05-fp8-kwmgs-slice-job-0-0.mt-05-fp8-kwmgs:8482 I0421 01:04:22.444115 134491761944384 max_utils.py:284] Jax distributed system initialized! I0421 01:04:29.545162 134491761944384 max_utils.py:800] System Information: Jax Version: 0.8.1 I0421 01:04:29.545264 134491761944384 max_utils.py:801] System Information: Jaxlib Version: 0.8.1 I0421 01:04:29.545306 134491761944384 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 I0421 01:04:29.545342 134491761944384 train_utils.py:347] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0421 01:04:30.164262 134491761944384 maxtext_utils.py:1398] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0421 01:04:30.164580 134491761944384 checkpointing.py:677] Setting up checkpoint logger... I0421 01:04:30.164640 134491761944384 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True I0421 01:04:30.164684 134491761944384 pytree_checkpoint_handler.py:589] save_device_host_concurrent_bytes=None I0421 01:04:30.165028 134491761944384 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 0x7a5150d71370>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0421 01:04:33.117168 134491761944384 checkpointing.py:265] Enabling policy for fixed interval checkpointing. I0421 01:04:33.117537 134491761944384 checkpoint_manager.py:709] [process=1][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7a3de583a030>}, handler_registry=None I0421 01:04:33.117774 134491761944384 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7a3de583a030>` 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`. I0421 01:04:33.117822 134491761944384 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a3de65aec00>` 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`. I0421 01:04:33.117861 134491761944384 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 0x7a3de583a030>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7a3de583a030>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a3de65aec00>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a3de65aec00>}). I0421 01:04:33.118360 134491761944384 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.33 I0421 01:04:33.118451 134491761944384 async_checkpointer.py:177] [process=1][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7a3de6238040> timeout: 600 secs and primary_host=0 for async checkpoint writes I0421 01:04:34.229017 134491761944384 checkpoint_manager.py:1818] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_05_fp8/checkpoints I0421 01:04:34.622460 134491761944384 checkpoint_manager.py:929] [process=1][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_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_05_fp8/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7a500879bcb0> I0421 01:04:34.622630 134491761944384 checkpointing.py:301] Checkpoint manager created! I0421 01:04:35.692895 134491761944384 nnx_wrappers.py:453] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0421 01:04:35.693018 134491761944384 nnx_wrappers.py:453] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0421 01:04:36.066143 134491761944384 attentions.py:1084] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0421 01:04:36.066240 134491761944384 attentions.py:1084] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0421 01:04:36.082044 134491761944384 attentions.py:1085] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0421 01:04:36.082104 134491761944384 attentions.py:1085] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0421 01:04:36.140876 134491761944384 attentions.py:1150] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0421 01:04:36.140961 134491761944384 attentions.py:1150] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0421 01:04:36.156931 134491761944384 attentions.py:1151] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0421 01:04:36.156998 134491761944384 attentions.py:1151] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0421 01:04:36.172799 134491761944384 attentions.py:1152] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0421 01:04:36.172861 134491761944384 attentions.py:1152] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0421 01:04:36.196606 134491761944384 attentions.py:1193] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0421 01:04:36.196678 134491761944384 attentions.py:1193] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0421 01:04:36.256871 134491761944384 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0421 01:04:36.256955 134491761944384 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0421 01:04:36.719732 134491761944384 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint I0421 01:04:36.719848 134491761944384 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0421 01:04:38.743701 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0421 01:04:38.743826 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0421 01:04:38.743876 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0421 01:04:38.743930 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0421 01:04:38.743968 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0421 01:04:38.744001 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0421 01:04:38.744033 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0421 01:04:38.744064 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0421 01:04:38.744094 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0421 01:04:38.744124 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0421 01:04:38.744153 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0421 01:04:38.744184 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0421 01:04:38.744214 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0421 01:04:38.744244 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0421 01:04:38.744273 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0421 01:04:38.744302 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0421 01:04:38.744331 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0421 01:04:38.744361 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0421 01:04:38.744389 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0421 01:04:38.744433 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0421 01:04:38.744463 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0421 01:04:38.744490 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0421 01:04:38.744518 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0421 01:04:38.744545 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0421 01:04:38.744573 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0421 01:04:38.744601 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0421 01:04:38.744628 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0421 01:04:38.744655 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0421 01:04:38.744681 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0421 01:04:38.744708 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0421 01:04:38.744735 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0421 01:04:38.744761 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0421 01:04:38.744788 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0421 01:04:38.744814 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0421 01:04:38.744841 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0421 01:04:38.744868 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0421 01:04:38.744898 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0421 01:04:38.744925 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0421 01:04:38.744952 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0421 01:04:38.744978 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0421 01:04:38.745005 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: PartitionSpec() Physical: () I0421 01:04:38.745031 134491761944384 maxtext_utils.py:1501] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: PartitionSpec() Physical: () I0421 01:04:38.745079 134491761944384 maxtext_utils.py:1501] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: PartitionSpec('norm',) Physical: (None,) I0421 01:04:38.745142 134491761944384 maxtext_utils.py:1501] params/params/decoder/layers/mlp/wi_0/kernel Shape: float32[2048,16,7168] Logical: PartitionSpec('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0421 01:04:38.745181 134491761944384 maxtext_utils.py:1501] params/params/decoder/layers/mlp/wi_1/kernel Shape: float32[2048,16,7168] Logical: PartitionSpec('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0421 01:04:38.745228 134491761944384 maxtext_utils.py:1501] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: PartitionSpec('mlp', 'layers', 'embed') Physical: (None, None, 'fsdp') I0421 01:04:38.745271 134491761944384 maxtext_utils.py:1501] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: PartitionSpec('norm', 'layers') Physical: (None, None) I0421 01:04:38.745304 134491761944384 maxtext_utils.py:1501] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: PartitionSpec('norm', 'layers') Physical: (None, None) I0421 01:04:38.745351 134491761944384 maxtext_utils.py:1501] 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) I0421 01:04:38.745421 134491761944384 maxtext_utils.py:1501] 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') I0421 01:04:38.745465 134491761944384 maxtext_utils.py:1501] 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) I0421 01:04:38.745501 134491761944384 maxtext_utils.py:1501] 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) I0421 01:04:38.745549 134491761944384 maxtext_utils.py:1501] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: PartitionSpec('embed', 'vocab') Physical: ('fsdp', None) I0421 01:04:38.745592 134491761944384 maxtext_utils.py:1501] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: PartitionSpec('vocab', 'embed') Physical: (None, 'fsdp') I0421 01:04:40.511505 134491761944384 train.py:156] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0421 01:04:40.511602 134491761944384 train.py:156] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0421 01:04:40.526652 134491761944384 train.py:163] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0421 01:04:40.526712 134491761944384 train.py:163] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0421 01:04:53.479868 134491761944384 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. I0421 01:04:53.480835 134491761944384 metric_logger.py:289] number parameters: 1.105 billion I0421 01:05:08.087339 134491761944384 checkpointing.py:772] Waiting for step 0 to finish before checkpoint... I0421 01:05:08.354638 134491761944384 checkpointing.py:776] Waited 0.26728057861328125 seconds for step 0 to finish before starting checkpointing. I0421 01:05:08.357353 134491761944384 checkpoint_manager.py:2013] [process=1][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0421 01:05:08.359317 134491761944384 checkpoint_manager.py:1518] [process=1] Saving checkpoint at step 0 I0421 01:05:08.362063 134491761944384 async_checkpointer.py:452] [process=1] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_05_fp8/checkpoints/0. I0421 01:05:09.847257 134491761944384 signaling_client.py:364] Using JaxDistributedSignalingClient I0421 01:05:09.848316 134491761944384 jax_array_handlers.py:358] Scheduling D2H of 81 prioritized jax.Array. I0421 01:05:09.848376 134491761944384 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 I0421 01:05:10.216958 134491761944384 base_pytree_checkpoint_handler.py:153] [process=1][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.369826s I0421 01:05:10.217127 134491761944384 base_pytree_checkpoint_handler.py:129] [process=1] /jax/checkpoint/write/blocking_gbytes_per_sec: 1.446 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 1.0665411949157715 s) (per-host) I0421 01:05:10.217177 134491761944384 base_pytree_checkpoint_handler.py:737] [process=1][thread=MainThread] Initiated Pytree async_save. Time taken: 1.066599s (batch_requests_ready=0.691461s, total_serialization_initiated=0.375073s, others=0.000065s) I0421 01:05:10.217281 134491761944384 composite_checkpoint_handler.py:715] [process=1][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.070696s (all_items=0.000020s, per_item={'items': '0.00002003'}, temp_paths=1.070676) I0421 01:05:10.218262 134368882304768 async_checkpointer.py:79] [process=1][thread=async_save] Background save thread started. I0421 01:05:10.218446 134491761944384 async_checkpointer.py:561] Finished blocking save. Time taken: 1.859056s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_05_fp8/checkpoints/0. I0421 01:05:10.220293 134491761944384 checkpoint_manager.py:1566] [process=1][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0421 01:05:10.220535 134361936553728 async_checkpointer.py:265] [process=1][thread=save_finalize] Waiting for background save thread=async_save. I0421 01:05:10.220663 134491761944384 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776733508.3573349, 'wait_for_prev_duration_secs': 7.82012939453125e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776733508.3593576, 'checkpointer_blocking_duration_secs': 1.8591952323913574, 'get_old_steps_start_time': 1776733510.2185729, 'get_old_steps_duration_secs': 2.574920654296875e-05, 'checkpoint_manager_blocking_start_time': 1776733508.3555343, 'checkpoint_manager_blocking_duration_secs': 1.8650915622711182} I0421 01:05:10.220827 134491761944384 checkpointing.py:408] Started an asynchronous checkpoint save for step 0 I0421 01:05:10.220883 134491761944384 max_utils.py:750] Memstats: After params initialized: I0421 01:05:10.220932 134491761944384 max_utils.py:756] Using (GB) 0.45 / 31.25 (1.440000%) on TPU_2(process=1,(2,0,0,0)) I0421 01:05:10.220968 134491761944384 max_utils.py:756] Using (GB) 0.45 / 31.25 (1.440000%) on TPU_3(process=1,(3,0,0,0)) I0421 01:05:10.220996 134491761944384 max_utils.py:756] Using (GB) 0.45 / 31.25 (1.440000%) on TPU_6(process=1,(2,1,0,0)) I0421 01:05:10.221020 134491761944384 max_utils.py:756] Using (GB) 0.45 / 31.25 (1.440000%) on TPU_7(process=1,(3,1,0,0)) I0421 01:05:10.483204 134491761944384 metric_logger.py:185] completed step: 0, seconds: 14.606, TFLOP/s/device: 0.930, Tokens/s/device: 140.213, total_weights: 65536, loss: 10.874 I0421 01:05:10.665257 134491761944384 metric_logger.py:185] completed step: 1, seconds: 2.394, TFLOP/s/device: 5.676, Tokens/s/device: 855.505, total_weights: 65536, loss: 10.874 I0421 01:05:11.076025 134491761944384 metric_logger.py:185] completed step: 2, seconds: 0.025, TFLOP/s/device: 547.449, Tokens/s/device: 82517.426, total_weights: 65536, loss: 10.816 I0421 01:05:11.234155 134491761944384 metric_logger.py:185] completed step: 3, seconds: 0.411, TFLOP/s/device: 33.030, Tokens/s/device: 4978.692, total_weights: 65536, loss: 10.431 I0421 01:05:11.551558 134491761944384 metric_logger.py:185] completed step: 4, seconds: 0.163, TFLOP/s/device: 83.157, Tokens/s/device: 12534.273, total_weights: 65536, loss: 9.992 I0421 01:05:11.557825 134491761944384 metric_logger.py:185] completed step: 5, seconds: 0.158, TFLOP/s/device: 85.924, Tokens/s/device: 12951.369, total_weights: 65536, loss: 9.549 I0421 01:05:32.230993 134491761944384 metric_logger.py:185] completed step: 6, seconds: 0.318, TFLOP/s/device: 42.754, Tokens/s/device: 6444.345, total_weights: 65536, loss: 9.111 I0421 01:05:32.389210 134491761944384 metric_logger.py:185] completed step: 7, seconds: 20.516, TFLOP/s/device: 0.662, Tokens/s/device: 99.822, total_weights: 65536, loss: 8.685 I0421 01:05:32.547502 134491761944384 metric_logger.py:185] completed step: 8, seconds: 0.163, TFLOP/s/device: 83.501, Tokens/s/device: 12586.192, total_weights: 65536, loss: 8.281 I0421 01:05:32.552586 134491761944384 checkpointing.py:772] Waiting for step 10 to finish before checkpoint... I0421 01:05:32.864268 134491761944384 checkpointing.py:776] Waited 0.3116493225097656 seconds for step 10 to finish before starting checkpointing. I0421 01:05:32.867048 134491761944384 checkpoint_manager.py:2024] [process=1][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0421 01:05:33.764613 2683 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0421 01:05:35.620198 134368890697472 array_metadata_store.py:203] [process=1][thread=array_type_handler] Wrote 81 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_05_fp8/checkpoints/0/items/array_metadatas/process_1 I0421 01:05:50.810943 134368882304768 base_pytree_checkpoint_handler.py:129] [process=1] /jax/checkpoint/write/gbytes_per_sec: 37.920 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.660295486450195 s) (per-host) I0421 01:05:50.811062 134368882304768 async_checkpointer.py:90] [process=1][thread=async_save] 3 Handler Commit operations completed. Time taken: 40.592688s. I0421 01:05:58.549211 134368882304768 async_checkpointer.py:144] [process=1][thread=async_save] Background save thread done. Time taken: 48.330820s. I0421 01:05:58.549502 134361936553728 async_checkpointer.py:273] [process=1][thread=save_finalize] Done with waiting for background save thread=async_save. I0421 01:05:58.549620 134361936553728 async_checkpointer.py:283] [process=1][thread=save_finalize] No errors found in background save thread=async_save. I0421 01:05:58.549674 134361936553728 checkpoint_manager.py:2133] [process=1][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0421 01:05:58.551312 134361936553728 checkpoint_manager.py:2142] [process=1][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0421 01:05:58.551497 134491761944384 checkpoint_manager.py:2036] [process=1][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0. W0421 01:05:58.551627 134491761944384 checkpoint_manager.py:1458] Waiting for previous save to complete took 25.684584 seconds. If this number is high, consider checkpointing less frequently. I0421 01:05:58.553565 134491761944384 checkpoint_manager.py:1518] [process=1] Saving checkpoint at step 10 I0421 01:05:58.556993 134491761944384 async_checkpointer.py:452] [process=1] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_05_fp8/checkpoints/10. I0421 01:05:59.093441 134491761944384 jax_array_handlers.py:358] Scheduling D2H of 81 prioritized jax.Array. I0421 01:05:59.093557 134491761944384 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 I0421 01:05:59.156429 134491761944384 base_pytree_checkpoint_handler.py:153] [process=1][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.064004s I0421 01:05:59.156593 134491761944384 base_pytree_checkpoint_handler.py:129] [process=1] /jax/checkpoint/write/blocking_gbytes_per_sec: 4.835 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.31908440589904785 s) (per-host) I0421 01:05:59.156642 134491761944384 base_pytree_checkpoint_handler.py:737] [process=1][thread=MainThread] Initiated Pytree async_save. Time taken: 0.319142s (batch_requests_ready=0.251564s, total_serialization_initiated=0.067513s, others=0.000066s) I0421 01:05:59.156738 134491761944384 composite_checkpoint_handler.py:715] [process=1][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.323179s (all_items=0.000016s, per_item={'items': '0.00001574'}, temp_paths=0.323164) I0421 01:05:59.157602 134368890697472 async_checkpointer.py:79] [process=1][thread=async_save] Background save thread started. I0421 01:05:59.157756 134491761944384 async_checkpointer.py:561] Finished blocking save. Time taken: 0.604119s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_05_fp8/checkpoints/10. I0421 01:05:59.159629 134491761944384 checkpoint_manager.py:1566] [process=1][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize I0421 01:05:59.159927 134361936553728 async_checkpointer.py:265] [process=1][thread=save_finalize] Waiting for background save thread=async_save. I0421 01:05:59.160060 134491761944384 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776733532.8670187, 'wait_for_prev_duration_secs': 25.684584140777588, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776733558.5536044, 'checkpointer_blocking_duration_secs': 0.6042587757110596, 'get_old_steps_start_time': 1776733559.1578832, 'get_old_steps_duration_secs': 2.5033950805664062e-05, 'checkpoint_manager_blocking_start_time': 1776733532.865192, 'checkpoint_manager_blocking_duration_secs': 26.294833660125732} I0421 01:05:59.160236 134491761944384 checkpointing.py:408] Started an asynchronous checkpoint save for step 10 I0421 01:05:59.160602 134491761944384 metric_logger.py:185] completed step: 9, seconds: 0.158, TFLOP/s/device: 85.876, Tokens/s/device: 12944.166, total_weights: 65536, loss: 7.908 I0421 01:05:59.167113 134491761944384 metric_logger.py:185] completed step: 10, seconds: 0.158, TFLOP/s/device: 85.873, Tokens/s/device: 12943.757, total_weights: 65536, loss: 7.568 I0421 01:05:59.325665 134491761944384 metric_logger.py:185] completed step: 11, seconds: 26.613, TFLOP/s/device: 0.511, Tokens/s/device: 76.956, total_weights: 65536, loss: 7.288 I0421 01:05:59.483928 134491761944384 metric_logger.py:185] completed step: 12, seconds: 0.006, TFLOP/s/device: 2339.785, Tokens/s/device: 352677.803, total_weights: 65536, loss: 7.032 I0421 01:05:59.642014 134491761944384 metric_logger.py:185] completed step: 13, seconds: 0.160, TFLOP/s/device: 85.160, Tokens/s/device: 12836.182, total_weights: 65536, loss: 6.815 I0421 01:05:59.800252 134491761944384 metric_logger.py:185] completed step: 14, seconds: 0.158, TFLOP/s/device: 85.801, Tokens/s/device: 12932.804, total_weights: 65536, loss: 6.635 I0421 01:05:59.958416 134491761944384 metric_logger.py:185] completed step: 15, seconds: 0.158, TFLOP/s/device: 85.938, Tokens/s/device: 12953.581, total_weights: 65536, loss: 6.492 I0421 01:06:00.116539 134491761944384 metric_logger.py:185] completed step: 16, seconds: 0.158, TFLOP/s/device: 85.949, Tokens/s/device: 12955.138, total_weights: 65536, loss: 6.380 I0421 01:06:00.274785 134491761944384 metric_logger.py:185] completed step: 17, seconds: 0.158, TFLOP/s/device: 85.913, Tokens/s/device: 12949.813, total_weights: 65536, loss: 6.293 I0421 01:06:00.432933 134491761944384 metric_logger.py:185] completed step: 18, seconds: 0.158, TFLOP/s/device: 85.883, Tokens/s/device: 12945.229, total_weights: 65536, loss: 6.223 I0421 01:06:00.590941 134491761944384 checkpointing.py:772] Waiting for step 19 to finish before checkpoint... I0421 01:06:00.591879 134491761944384 checkpointing.py:776] Waited 0.0009567737579345703 seconds for step 19 to finish before starting checkpointing. I0421 01:06:00.593913 134491761944384 checkpoint_manager.py:2024] [process=1][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0421 01:06:03.926673 134362448246528 array_metadata_store.py:203] [process=1][thread=array_type_handler] Wrote 81 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_05_fp8/checkpoints/10/items/array_metadatas/process_1 I0421 01:06:40.248553 134368890697472 base_pytree_checkpoint_handler.py:129] [process=1] /jax/checkpoint/write/gbytes_per_sec: 38.148 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.410995960235596 s) (per-host) I0421 01:06:40.248675 134368890697472 async_checkpointer.py:90] [process=1][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.090968s. I0421 01:06:50.366649 134368890697472 async_checkpointer.py:144] [process=1][thread=async_save] Background save thread done. Time taken: 51.208927s. I0421 01:06:50.366952 134361936553728 async_checkpointer.py:273] [process=1][thread=save_finalize] Done with waiting for background save thread=async_save. I0421 01:06:50.367071 134361936553728 async_checkpointer.py:283] [process=1][thread=save_finalize] No errors found in background save thread=async_save. I0421 01:06:50.367118 134361936553728 checkpoint_manager.py:2133] [process=1][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts... I0421 01:06:50.368885 134361936553728 checkpoint_manager.py:2142] [process=1][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts. I0421 01:06:50.369086 134491761944384 checkpoint_manager.py:2036] [process=1][thread=MainThread][step=10][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=10. W0421 01:06:50.369223 134491761944384 checkpoint_manager.py:1458] Waiting for previous save to complete took 49.775323 seconds. If this number is high, consider checkpointing less frequently. I0421 01:06:50.371089 134491761944384 checkpoint_manager.py:1518] [process=1] Saving checkpoint at step 19 I0421 01:06:50.374665 134491761944384 async_checkpointer.py:452] [process=1] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_05_fp8/checkpoints/19. I0421 01:06:50.910393 134491761944384 jax_array_handlers.py:358] Scheduling D2H of 81 prioritized jax.Array. I0421 01:06:50.910507 134491761944384 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 I0421 01:06:50.971938 134491761944384 base_pytree_checkpoint_handler.py:153] [process=1][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.062489s I0421 01:06:50.972099 134491761944384 base_pytree_checkpoint_handler.py:129] [process=1] /jax/checkpoint/write/blocking_gbytes_per_sec: 4.792 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.3219606876373291 s) (per-host) I0421 01:06:50.972146 134491761944384 base_pytree_checkpoint_handler.py:737] [process=1][thread=MainThread] Initiated Pytree async_save. Time taken: 0.322017s (batch_requests_ready=0.256068s, total_serialization_initiated=0.065888s, others=0.000061s) I0421 01:06:50.972244 134491761944384 composite_checkpoint_handler.py:715] [process=1][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.326064s (all_items=0.000011s, per_item={'items': '0.00001073'}, temp_paths=0.326054) I0421 01:06:50.973068 134362448246528 async_checkpointer.py:79] [process=1][thread=async_save] Background save thread started. I0421 01:06:50.973228 134491761944384 async_checkpointer.py:561] Finished blocking save. Time taken: 0.602061s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_05_fp8/checkpoints/19. I0421 01:06:50.999935 134491761944384 checkpoint_manager.py:1566] [process=1][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize I0421 01:06:51.000257 134361936553728 async_checkpointer.py:265] [process=1][thread=save_finalize] Waiting for background save thread=async_save. I0421 01:06:51.000430 134491761944384 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776733560.5938828, 'wait_for_prev_duration_secs': 49.77532339096069, 'time_between_consecutive_saves_sec': 2.042530059814453, 'checkpointer_blocking_start_time': 1776733610.371135, 'checkpointer_blocking_duration_secs': 0.6022000312805176, 'get_old_steps_start_time': 1776733610.9733493, 'get_old_steps_duration_secs': 2.2172927856445312e-05, 'checkpoint_manager_blocking_start_time': 1776733560.5921562, 'checkpoint_manager_blocking_duration_secs': 50.408231258392334} I0421 01:06:51.000545 134491761944384 checkpointing.py:408] Started an asynchronous checkpoint save for step 19 I0421 01:06:51.000588 134491761944384 checkpoint_manager.py:2024] [process=1][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0421 01:06:55.669014 134364654446336 array_metadata_store.py:203] [process=1][thread=array_type_handler] Wrote 81 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_05_fp8/checkpoints/19/items/array_metadatas/process_1 I0421 01:07:33.224014 134362448246528 base_pytree_checkpoint_handler.py:129] [process=1] /jax/checkpoint/write/gbytes_per_sec: 37.106 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.57384157180786 s) (per-host) I0421 01:07:33.224117 134362448246528 async_checkpointer.py:90] [process=1][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.250937s. I0421 01:07:40.182493 134362448246528 async_checkpointer.py:144] [process=1][thread=async_save] Background save thread done. Time taken: 49.209296s. I0421 01:07:40.182772 134361936553728 async_checkpointer.py:273] [process=1][thread=save_finalize] Done with waiting for background save thread=async_save. I0421 01:07:40.182903 134361936553728 async_checkpointer.py:283] [process=1][thread=save_finalize] No errors found in background save thread=async_save. I0421 01:07:40.182954 134361936553728 checkpoint_manager.py:2133] [process=1][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts... I0421 01:07:40.184307 134361936553728 checkpoint_manager.py:2142] [process=1][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts. I0421 01:07:40.184512 134491761944384 checkpoint_manager.py:2036] [process=1][thread=MainThread][step=19][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=19. I0421 01:07:40.184656 134491761944384 checkpoint_manager.py:2013] [process=1][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0421 01:07:40.185268 134491761944384 metric_logger.py:185] completed step: 19, seconds: 0.158, TFLOP/s/device: 85.906, Tokens/s/device: 12948.749, 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: Tue Apr 21 01:07:49 UTC 2026 EXIT_CODE=0