feat/nnx-post-train-fixes| Metric | Linen 7f06c99ac | NNX 7f06c99ac | Diff (NNX − Linen) |
|---|---|---|---|
| Parameters | 1.105 billion | 1.104 billion | — |
| Final loss | 6.1670 | 10.5490 | +4.382 |
| TFLOP/s | 85.739 | 86.596 | +0.857 |
| Tok/s | 12923.6 | 13052.6 | +129.068 |
| Avg s/step | 1.683 | 1.658 | -0.025 |
| Memory % | 1.44 | 1.44 | 0 |
| JAX | 0.9.2 | 0.9.2 | — |
Diff = NNX value − Linen value. Green = NNX improved. Red = NNX regressed.
XPK Start: Thu Apr 23 12:57:23 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. 2026-04-23 12:57:48.493307: 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) I0423 12:57:48.707322 137766256609088 max_utils.py:273] Attempting to initialize the jax distributed system... I0423 12:57:57.748845 137766256609088 distributed.py:149] Starting JAX distributed service on [::]:8482 I0423 12:57:57.751228 137766256609088 distributed.py:172] Connecting to JAX distributed service on mt-05-fp8-3kov9-slice-job-0-0.mt-05-fp8-3kov9:8482 I0423 12:57:58.952524 137766256609088 max_utils.py:284] Jax distributed system initialized! I0423 12:58:05.234977 137766256609088 max_utils.py:800] System Information: Jax Version: 0.9.2 I0423 12:58:05.235082 137766256609088 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0423 12:58:05.235122 137766256609088 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 I0423 12:58:05.235159 137766256609088 train_utils.py:391] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0423 12:58:05.945783 137766256609088 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0423 12:58:05.946375 137766256609088 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0423 12:58:05.946556 137766256609088 checkpointing.py:688] Setting up checkpoint logger... I0423 12:58:05.946607 137766256609088 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0423 12:58:05.946659 137766256609088 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0423 12:58:05.947002 137766256609088 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 0x7d4b96d181d0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0423 12:58:08.786869 137766256609088 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0423 12:58:08.787099 137766256609088 checkpoint_manager.py:708] [process=5][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d3800712b10>}, handler_registry=None I0423 12:58:08.787353 137766256609088 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d3800712b10>` 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`. I0423 12:58:08.787405 137766256609088 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d3818264ec0>` 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`. I0423 12:58:08.787441 137766256609088 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 0x7d3800712b10>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d3800712b10>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d3818264ec0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d3818264ec0>}). I0423 12:58:08.787789 137766256609088 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0423 12:58:08.787861 137766256609088 async_checkpointer.py:192] [process=5][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7d37e8459d00> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0423 12:58:10.368114 137766256609088 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints I0423 12:58:10.820600 137766256609088 checkpoint_manager.py:929] [process=5][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_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7d4a70e382f0> I0423 12:58:10.820804 137766256609088 checkpointing.py:302] Checkpoint manager created! I0423 12:58:11.940890 137766256609088 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0423 12:58:11.941000 137766256609088 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 12:58:12.330400 137766256609088 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 12:58:12.330498 137766256609088 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 12:58:12.347068 137766256609088 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 12:58:12.347124 137766256609088 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 12:58:12.400186 137766256609088 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 12:58:12.400277 137766256609088 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 12:58:12.417085 137766256609088 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 12:58:12.417146 137766256609088 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 12:58:12.433761 137766256609088 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 12:58:12.433818 137766256609088 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 12:58:12.459330 137766256609088 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0423 12:58:12.459401 137766256609088 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 12:58:12.511096 137766256609088 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0423 12:58:12.511172 137766256609088 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0423 12:58:12.961747 137766256609088 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0423 12:58:12.961873 137766256609088 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0423 12:58:14.890910 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0423 12:58:14.891032 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: P() Physical: () I0423 12:58:14.891083 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0423 12:58:14.891124 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: P() Physical: () I0423 12:58:14.891160 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0423 12:58:14.891202 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/mlp/wi_0/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: P() Physical: () I0423 12:58:14.891236 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0423 12:58:14.891269 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: P() Physical: () I0423 12:58:14.891301 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0423 12:58:14.891332 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: P() Physical: () I0423 12:58:14.891361 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0423 12:58:14.891395 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/mlp/wi_1/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: P() Physical: () I0423 12:58:14.891426 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0423 12:58:14.891457 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: P() Physical: () I0423 12:58:14.891486 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0423 12:58:14.891515 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: P() Physical: () I0423 12:58:14.891544 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0423 12:58:14.891572 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/mlp/wo/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: P() Physical: () I0423 12:58:14.891601 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0423 12:58:14.891628 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: P() Physical: () I0423 12:58:14.891668 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0423 12:58:14.891699 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: P() Physical: () I0423 12:58:14.891728 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0423 12:58:14.891755 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/self_attention/key/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: P() Physical: () I0423 12:58:14.891783 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0423 12:58:14.891810 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: P() Physical: () I0423 12:58:14.891838 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0423 12:58:14.891865 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: P() Physical: () I0423 12:58:14.891892 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0423 12:58:14.891920 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/self_attention/out/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: P() Physical: () I0423 12:58:14.891948 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0423 12:58:14.891976 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: P() Physical: () I0423 12:58:14.892004 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0423 12:58:14.892031 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: P() Physical: () I0423 12:58:14.892058 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0423 12:58:14.892086 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/self_attention/query/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: P() Physical: () I0423 12:58:14.892112 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/input_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0423 12:58:14.892139 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/input_scale Shape: float32[16,1] Logical: P() Physical: () I0423 12:58:14.892184 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/kernel_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0423 12:58:14.892214 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/kernel_scale Shape: float32[16,1] Logical: P() Physical: () I0423 12:58:14.892243 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/output_grad_amax_history Shape: float32[16,1024] Logical: P() Physical: () I0423 12:58:14.892270 137766256609088 maxtext_utils.py:1880] params/_overwrite_with_gradient/decoder/layers/self_attention/value/Fp8DirectDotGeneralOp_0/output_grad_scale Shape: float32[16,1] Logical: P() Physical: () I0423 12:58:14.892321 137766256609088 maxtext_utils.py:1880] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0423 12:58:14.892374 137766256609088 maxtext_utils.py:1880] params/params/decoder/layers/mlp/wi_0/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0423 12:58:14.892413 137766256609088 maxtext_utils.py:1880] params/params/decoder/layers/mlp/wi_1/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0423 12:58:14.892461 137766256609088 maxtext_utils.py:1880] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: P('mlp', 'layers', 'embed') Physical: (None, None, 'fsdp') I0423 12:58:14.892508 137766256609088 maxtext_utils.py:1880] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0423 12:58:14.892543 137766256609088 maxtext_utils.py:1880] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0423 12:58:14.892590 137766256609088 maxtext_utils.py:1880] 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) I0423 12:58:14.892638 137766256609088 maxtext_utils.py:1880] 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') I0423 12:58:14.892711 137766256609088 maxtext_utils.py:1880] 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) I0423 12:58:14.892750 137766256609088 maxtext_utils.py:1880] 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) I0423 12:58:14.892798 137766256609088 maxtext_utils.py:1880] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0423 12:58:14.892844 137766256609088 maxtext_utils.py:1880] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0423 12:58:16.547358 137766256609088 train.py:157] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0423 12:58:16.547453 137766256609088 train.py:157] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0423 12:58:16.562975 137766256609088 train.py:164] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0423 12:58:16.563042 137766256609088 train.py:164] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0423 12:58:30.651262 137766256609088 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. I0423 12:58:30.652175 137766256609088 metric_logger.py:301] number parameters: 1.105 billion I0423 12:58:45.719362 137766256609088 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0423 12:58:45.892343 137766256609088 checkpointing.py:798] Waited 0.1729569435119629 seconds for step 0 to finish before starting checkpointing. I0423 12:58:45.894746 137766256609088 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 12:58:45.896722 137766256609088 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 0 I0423 12:58:45.898169 137766256609088 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/0. I0423 12:58:46.636516 137766256609088 signaling_client.py:364] Using JaxDistributedSignalingClient I0423 12:58:46.637436 137766256609088 jax_array_handlers.py:360] Scheduling D2H of 81 prioritized jax.Array. I0423 12:58:46.637497 137766256609088 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 I0423 12:58:47.050123 137766256609088 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.413729s I0423 12:58:47.050303 137766256609088 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 3.653 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.4223034381866455 s) (per-host) I0423 12:58:47.050358 137766256609088 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.422368s (batch_requests_ready=0.003514s, total_serialization_initiated=0.418782s, others=0.000072s) I0423 12:58:47.050459 137766256609088 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.426485s (all_items=0.000018s, per_item={'items': '0.00001764'}, temp_paths=0.426467) I0423 12:58:47.051327 137766256609088 event_tracking.py:125] [process=5] [async] Finished blocking save in 1.15 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/0. I0423 12:58:47.051671 137640853485312 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 13:18:47.051619 I0423 12:58:47.055740 137766256609088 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0423 12:58:47.056048 137640338777856 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0423 12:58:47.056210 137766256609088 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776949125.894728, 'wait_for_prev_duration_secs': 6.175041198730469e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776949125.8967605, 'checkpointer_blocking_duration_secs': 1.1550631523132324, 'get_old_steps_start_time': 1776949127.05185, 'get_old_steps_duration_secs': 2.956390380859375e-05, 'checkpoint_manager_blocking_start_time': 1776949125.8929722, 'checkpoint_manager_blocking_duration_secs': 1.163194179534912} I0423 12:58:47.056323 137766256609088 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0423 12:58:47.056372 137766256609088 max_utils.py:750] Memstats: After params initialized: I0423 12:58:47.056422 137766256609088 max_utils.py:756] Using (GB) 0.45 / 31.25 (1.440000%) on TPU_18(process=5,(2,4,0,0)) I0423 12:58:47.056454 137766256609088 max_utils.py:756] Using (GB) 0.45 / 31.25 (1.440000%) on TPU_19(process=5,(3,4,0,0)) I0423 12:58:47.056481 137766256609088 max_utils.py:756] Using (GB) 0.45 / 31.25 (1.440000%) on TPU_22(process=5,(2,5,0,0)) I0423 12:58:47.056506 137766256609088 max_utils.py:756] Using (GB) 0.45 / 31.25 (1.440000%) on TPU_23(process=5,(3,5,0,0)) I0423 12:58:47.386138 137766256609088 metric_logger.py:196] completed step: 0, seconds: 15.067, TFLOP/s/device: 0.902, Tokens/s/device: 135.925, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52776.805 I0423 12:58:47.566607 137766256609088 metric_logger.py:196] completed step: 1, seconds: 1.665, TFLOP/s/device: 8.162, Tokens/s/device: 1230.224, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52761.840 I0423 12:58:47.981162 137766256609088 metric_logger.py:196] completed step: 2, seconds: 0.023, TFLOP/s/device: 588.697, Tokens/s/device: 88734.835, total_weights: 65536, loss: 10.816, lm_loss: 10.816, perplexity: 49832.398 I0423 12:58:48.140054 137766256609088 metric_logger.py:196] completed step: 3, seconds: 0.415, TFLOP/s/device: 32.752, Tokens/s/device: 4936.748, total_weights: 65536, loss: 10.431, lm_loss: 10.431, perplexity: 33901.820 I0423 12:58:48.457703 137766256609088 metric_logger.py:196] completed step: 4, seconds: 0.164, TFLOP/s/device: 82.861, Tokens/s/device: 12489.785, total_weights: 65536, loss: 9.992, lm_loss: 9.992, perplexity: 21847.639 I0423 12:58:48.463986 137766256609088 metric_logger.py:196] completed step: 5, seconds: 0.159, TFLOP/s/device: 85.526, Tokens/s/device: 12891.368, total_weights: 65536, loss: 9.549, lm_loss: 9.549, perplexity: 14035.006 I0423 12:58:50.081887 2775 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0423 12:58:52.210256 137640347170560 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 81 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/0/items/array_metadatas/process_5 I0423 12:59:07.040245 137640853485312 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 77.393 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 20.41221284866333 s) (per-host) I0423 12:59:07.040359 137640853485312 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 19.988574s. I0423 12:59:12.286720 137766256609088 metric_logger.py:196] completed step: 6, seconds: 0.318, TFLOP/s/device: 42.742, Tokens/s/device: 6442.602, total_weights: 65536, loss: 9.111, lm_loss: 9.111, perplexity: 9058.688 I0423 12:59:12.445367 137766256609088 metric_logger.py:196] completed step: 7, seconds: 23.665, TFLOP/s/device: 0.574, Tokens/s/device: 86.539, total_weights: 65536, loss: 8.685, lm_loss: 8.685, perplexity: 5914.720 I0423 12:59:12.603983 137766256609088 metric_logger.py:196] completed step: 8, seconds: 0.164, TFLOP/s/device: 82.661, Tokens/s/device: 12459.619, total_weights: 65536, loss: 8.281, lm_loss: 8.281, perplexity: 3950.010 I0423 12:59:12.608880 137766256609088 checkpointing.py:794] Waiting for step 10 to finish before checkpoint... I0423 12:59:12.921725 137766256609088 checkpointing.py:798] Waited 0.31277966499328613 seconds for step 10 to finish before starting checkpointing. I0423 12:59:12.924345 137766256609088 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 12:59:15.750403 137640853485312 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 28.698601s. I0423 12:59:15.750725 137640338777856 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 12:59:15.750846 137640338777856 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0423 12:59:15.750898 137640338777856 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0423 12:59:15.753515 137640338777856 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0423 12:59:15.753670 137766256609088 checkpoint_manager.py:2032] [process=5][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0. W0423 12:59:15.753736 137766256609088 checkpoint_manager.py:1452] Waiting for previous save to complete took 2.829400 seconds. If this number is high, consider checkpointing less frequently. I0423 12:59:15.755529 137766256609088 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 10 I0423 12:59:15.757486 137766256609088 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/10. I0423 12:59:16.112607 137766256609088 jax_array_handlers.py:360] Scheduling D2H of 81 prioritized jax.Array. I0423 12:59:16.112714 137766256609088 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 I0423 12:59:16.166677 137766256609088 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.055115s I0423 12:59:16.166843 137766256609088 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 25.123 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.06140780448913574 s) (per-host) I0423 12:59:16.166893 137766256609088 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.061467s (batch_requests_ready=0.003136s, total_serialization_initiated=0.058264s, others=0.000067s) I0423 12:59:16.166994 137766256609088 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.065532s (all_items=0.000016s, per_item={'items': '0.00001621'}, temp_paths=0.065516) I0423 12:59:16.167687 137766256609088 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.41 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/10. I0423 12:59:16.168004 137636589074176 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 13:19:16.167981 I0423 12:59:16.169901 137766256609088 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize I0423 12:59:16.170179 137640338777856 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0423 12:59:16.170320 137766256609088 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776949152.9243133, 'wait_for_prev_duration_secs': 2.829399585723877, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776949155.7555673, 'checkpointer_blocking_duration_secs': 0.4125368595123291, 'get_old_steps_start_time': 1776949156.1681278, 'get_old_steps_duration_secs': 2.8848648071289062e-05, 'checkpoint_manager_blocking_start_time': 1776949152.922503, 'checkpoint_manager_blocking_duration_secs': 3.247784376144409} I0423 12:59:16.170482 137766256609088 checkpointing.py:409] Started an asynchronous checkpoint save for step 10 I0423 12:59:16.171059 137766256609088 metric_logger.py:196] completed step: 9, seconds: 0.157, TFLOP/s/device: 86.319, Tokens/s/device: 13010.940, total_weights: 65536, loss: 7.908, lm_loss: 7.908, perplexity: 2720.116 I0423 12:59:16.178238 137766256609088 metric_logger.py:196] completed step: 10, seconds: 0.159, TFLOP/s/device: 85.657, Tokens/s/device: 12911.116, total_weights: 65536, loss: 7.568, lm_loss: 7.568, perplexity: 1936.198 I0423 12:59:16.337056 137766256609088 metric_logger.py:196] completed step: 11, seconds: 3.567, TFLOP/s/device: 3.809, Tokens/s/device: 574.133, total_weights: 65536, loss: 7.288, lm_loss: 7.288, perplexity: 1463.272 I0423 12:59:16.898251 137766256609088 metric_logger.py:196] completed step: 12, seconds: 0.006, TFLOP/s/device: 2139.032, Tokens/s/device: 322418.136, total_weights: 65536, loss: 7.032, lm_loss: 7.032, perplexity: 1132.061 I0423 12:59:17.056515 137766256609088 metric_logger.py:196] completed step: 13, seconds: 0.558, TFLOP/s/device: 24.363, Tokens/s/device: 3672.265, total_weights: 65536, loss: 6.815, lm_loss: 6.815, perplexity: 911.031 I0423 12:59:17.214859 137766256609088 metric_logger.py:196] completed step: 14, seconds: 0.163, TFLOP/s/device: 83.123, Tokens/s/device: 12529.212, total_weights: 65536, loss: 6.635, lm_loss: 6.635, perplexity: 761.080 I0423 12:59:17.373148 137766256609088 metric_logger.py:196] completed step: 15, seconds: 0.158, TFLOP/s/device: 85.938, Tokens/s/device: 12953.581, total_weights: 65536, loss: 6.492, lm_loss: 6.492, perplexity: 659.915 I0423 12:59:17.531535 137766256609088 metric_logger.py:196] completed step: 16, seconds: 0.158, TFLOP/s/device: 85.832, Tokens/s/device: 12937.542, total_weights: 65536, loss: 6.380, lm_loss: 6.380, perplexity: 589.948 I0423 12:59:17.690035 137766256609088 metric_logger.py:196] completed step: 17, seconds: 0.158, TFLOP/s/device: 85.846, Tokens/s/device: 12939.586, total_weights: 65536, loss: 6.293, lm_loss: 6.293, perplexity: 540.941 I0423 12:59:17.848194 137766256609088 metric_logger.py:196] completed step: 18, seconds: 0.158, TFLOP/s/device: 85.822, Tokens/s/device: 12935.990, total_weights: 65536, loss: 6.223, lm_loss: 6.223, perplexity: 504.108 I0423 12:59:18.005964 137766256609088 checkpointing.py:794] Waiting for step 19 to finish before checkpoint... I0423 12:59:18.006973 137766256609088 checkpointing.py:798] Waited 0.001028299331665039 seconds for step 19 to finish before starting checkpointing. I0423 12:59:18.009876 137766256609088 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 12:59:22.194953 137637100766976 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 81 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/10/items/array_metadatas/process_5 I0423 12:59:59.180174 137636589074176 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 36.675 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 43.07469868659973 s) (per-host) I0423 12:59:59.180307 137636589074176 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 43.012224s. I0423 13:00:06.801047 137636589074176 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 50.632949s. I0423 13:00:06.801331 137640338777856 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 13:00:06.801459 137640338777856 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0423 13:00:06.801508 137640338777856 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts... I0423 13:00:06.803175 137640338777856 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts. I0423 13:00:06.803365 137766256609088 checkpoint_manager.py:2032] [process=5][thread=MainThread][step=10][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=10. W0423 13:00:06.803491 137766256609088 checkpoint_manager.py:1452] Waiting for previous save to complete took 48.793621 seconds. If this number is high, consider checkpointing less frequently. I0423 13:00:06.805197 137766256609088 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 19 I0423 13:00:06.807377 137766256609088 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/19. I0423 13:00:07.333661 137766256609088 jax_array_handlers.py:360] Scheduling D2H of 81 prioritized jax.Array. I0423 13:00:07.333757 137766256609088 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 I0423 13:00:07.385032 137766256609088 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.052336s I0423 13:00:07.385196 137766256609088 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 26.324 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.05860543251037598 s) (per-host) I0423 13:00:07.385243 137766256609088 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.058663s (batch_requests_ready=0.003140s, total_serialization_initiated=0.055461s, others=0.000062s) I0423 13:00:07.385343 137766256609088 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.062860s (all_items=0.000011s, per_item={'items': '0.00001097'}, temp_paths=0.062850) I0423 13:00:07.386033 137766256609088 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.58 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/19. I0423 13:00:07.386294 137640338777856 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 13:20:07.386270 I0423 13:00:07.388237 137766256609088 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize I0423 13:00:07.388457 137635490154240 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0423 13:00:07.388552 137766256609088 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776949158.0098476, 'wait_for_prev_duration_secs': 48.793620586395264, 'time_between_consecutive_saves_sec': 2.2562904357910156, 'checkpointer_blocking_start_time': 1776949206.805238, 'checkpointer_blocking_duration_secs': 0.5811562538146973, 'get_old_steps_start_time': 1776949207.3864148, 'get_old_steps_duration_secs': 2.384185791015625e-05, 'checkpoint_manager_blocking_start_time': 1776949158.007261, 'checkpoint_manager_blocking_duration_secs': 49.381258964538574} I0423 13:00:07.388734 137766256609088 checkpointing.py:409] Started an asynchronous checkpoint save for step 19 I0423 13:00:07.388782 137766256609088 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 13:00:12.847807 137637100766976 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 81 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/19/items/array_metadatas/process_5 I0423 13:00:49.792986 137640338777856 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 37.200 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.46636176109314 s) (per-host) I0423 13:00:49.793103 137640338777856 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.406730s. I0423 13:00:57.953485 137640338777856 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 50.567098s. I0423 13:00:57.953733 137635490154240 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 13:00:57.953796 137635490154240 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0423 13:00:57.953839 137635490154240 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts... I0423 13:00:57.955266 137635490154240 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts. I0423 13:00:57.955424 137766256609088 checkpoint_manager.py:2032] [process=5][thread=MainThread][step=19][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=19. I0423 13:00:57.955576 137766256609088 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 13:00:57.956517 137766256609088 metric_logger.py:196] completed step: 19, seconds: 0.158, TFLOP/s/device: 85.739, Tokens/s/device: 12923.582, 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: Thu Apr 23 13:01:08 UTC 2026 EXIT_CODE=0
XPK Start: Thu Apr 23 14:30:58 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. 2026-04-23 14:31:22.789785: 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) I0423 14:31:23.002042 132720895014720 max_utils.py:273] Attempting to initialize the jax distributed system... I0423 14:31:32.044381 132720895014720 distributed.py:149] Starting JAX distributed service on [::]:8482 I0423 14:31:32.046726 132720895014720 distributed.py:172] Connecting to JAX distributed service on mt-05-fp8-0b9f4-slice-job-0-0.mt-05-fp8-0b9f4:8482 I0423 14:31:33.401512 132720895014720 max_utils.py:284] Jax distributed system initialized! I0423 14:31:39.475560 132720895014720 max_utils.py:800] System Information: Jax Version: 0.9.2 I0423 14:31:39.475681 132720895014720 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0423 14:31:39.475726 132720895014720 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 I0423 14:31:39.475764 132720895014720 train_utils.py:391] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0423 14:31:40.158612 132720895014720 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0423 14:31:40.592018 132720895014720 checkpointing.py:688] Setting up checkpoint logger... I0423 14:31:40.592137 132720895014720 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0423 14:31:40.592182 132720895014720 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0423 14:31:40.592406 132720895014720 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 0x78b4dad18890>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0423 14:31:43.491353 132720895014720 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0423 14:31:43.491607 132720895014720 checkpoint_manager.py:708] [process=0][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x78a0544dcfe0>}, handler_registry=None I0423 14:31:43.491856 132720895014720 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x78a0544dcfe0>` 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`. I0423 14:31:43.491905 132720895014720 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x78a0544d9ac0>` 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`. I0423 14:31:43.491942 132720895014720 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 0x78a0544dcfe0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x78a0544dcfe0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x78a0544d9ac0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x78a0544d9ac0>}). I0423 14:31:43.492269 132720895014720 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0423 14:31:43.492341 132720895014720 async_checkpointer.py:192] [process=0][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x78a0a40b6fc0> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0423 14:31:44.697677 132720895014720 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints I0423 14:31:45.105427 132720895014720 checkpoint_manager.py:929] [process=0][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/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x78a0a40fbf20> I0423 14:31:45.105626 132720895014720 checkpointing.py:302] Checkpoint manager created! I0423 14:31:46.354678 132720895014720 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0423 14:31:46.354807 132720895014720 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0423 14:31:48.449262 132720895014720 maxtext_utils.py:1889] decoder/decoder_norm/scale/value Shape: float32[2048] Physical: (None,) I0423 14:31:48.449380 132720895014720 maxtext_utils.py:1889] decoder/layers/mlp/wi_0/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0423 14:31:48.449435 132720895014720 maxtext_utils.py:1889] decoder/layers/mlp/wi_1/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0423 14:31:48.449479 132720895014720 maxtext_utils.py:1889] decoder/layers/mlp/wo/kernel/value Shape: float32[7168,16,2048] Physical: (None, None, 'fsdp') I0423 14:31:48.449517 132720895014720 maxtext_utils.py:1889] decoder/layers/post_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0423 14:31:48.449552 132720895014720 maxtext_utils.py:1889] decoder/layers/pre_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0423 14:31:48.449600 132720895014720 maxtext_utils.py:1889] decoder/layers/self_attention/key/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0423 14:31:48.449636 132720895014720 maxtext_utils.py:1889] decoder/layers/self_attention/out/kernel/value Shape: float32[16,16,128,2048] Physical: (None, None, None, 'fsdp') I0423 14:31:48.449671 132720895014720 maxtext_utils.py:1889] decoder/layers/self_attention/query/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0423 14:31:48.449703 132720895014720 maxtext_utils.py:1889] decoder/layers/self_attention/value/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0423 14:31:48.449735 132720895014720 maxtext_utils.py:1889] decoder/logits_dense/kernel/value Shape: float32[2048,32000] Physical: ('fsdp', None) I0423 14:31:48.449768 132720895014720 maxtext_utils.py:1889] token_embedder/embedding/value Shape: float32[32000,2048] Physical: (None, 'fsdp') I0423 14:31:48.866006 132720895014720 nnx_decoders.py:465] nnx_decoders/carry Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0423 14:31:48.866109 132720895014720 nnx_decoders.py:465] nnx_decoders/carry Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 14:31:49.268905 132720895014720 nnx_decoders.py:465] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0423 14:31:49.269010 132720895014720 nnx_decoders.py:465] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 14:31:49.290550 132720895014720 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 14:31:49.290630 132720895014720 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 14:31:49.307496 132720895014720 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 14:31:49.307562 132720895014720 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 14:31:49.368539 132720895014720 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 14:31:49.368632 132720895014720 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 14:31:49.385608 132720895014720 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 14:31:49.385672 132720895014720 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 14:31:49.402663 132720895014720 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 14:31:49.402725 132720895014720 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 14:31:49.434544 132720895014720 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0423 14:31:49.434627 132720895014720 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 14:31:49.494872 132720895014720 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0423 14:31:49.494955 132720895014720 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0423 14:32:02.928919 132720895014720 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. I0423 14:32:02.940051 132720895014720 metric_logger.py:301] number parameters: 1.104 billion I0423 14:32:17.340161 132720895014720 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0423 14:32:17.501348 132720895014720 checkpointing.py:798] Waited 0.16117238998413086 seconds for step 0 to finish before starting checkpointing. I0423 14:32:17.503795 132720895014720 checkpoint_manager.py:2009] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 14:32:17.505926 132720895014720 checkpoint_manager.py:1512] [process=0] Saving checkpoint at step 0 I0423 14:32:17.507377 132720895014720 event_tracking.py:70] [process=0] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/0. I0423 14:32:17.837808 132720895014720 signaling_client.py:364] Using JaxDistributedSignalingClient I0423 14:32:17.867572 132720895014720 jax_array_handlers.py:360] Scheduling D2H of 153 prioritized jax.Array. I0423 14:32:17.867670 132720895014720 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 I0423 14:32:18.101064 132591000741632 atomicity.py:140] Creating tmp directory gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/0 I0423 14:32:18.722691 132720895014720 base_pytree_checkpoint_handler.py:154] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.857497s I0423 14:32:18.723456 132720895014720 base_pytree_checkpoint_handler.py:130] [process=0] /jax/orbax/write/blocking_gbytes_per_sec: 1.757 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.8780510425567627 s) (per-host) I0423 14:32:18.723529 132720895014720 base_pytree_checkpoint_handler.py:768] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 0.878144s (batch_requests_ready=0.006089s, total_serialization_initiated=0.871370s, others=0.000684s) I0423 14:32:18.723630 132720895014720 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.882142s (all_items=0.000017s, per_item={'items': '0.00001717'}, temp_paths=0.882125) I0423 14:32:18.724358 132720895014720 event_tracking.py:125] [process=0] [async] Finished blocking save in 1.22 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/0. I0423 14:32:18.724667 132591009134336 async_checkpointer.py:76] [process=0][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 14:52:18.724633 I0423 14:32:18.726746 132720895014720 checkpoint_manager.py:1560] [process=0][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0423 14:32:18.726978 132590472263424 async_checkpointer.py:280] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0423 14:32:18.727097 132720895014720 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776954737.5037768, 'wait_for_prev_duration_secs': 6.318092346191406e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776954737.505964, 'checkpointer_blocking_duration_secs': 1.2188405990600586, 'get_old_steps_start_time': 1776954738.7248318, 'get_old_steps_duration_secs': 2.86102294921875e-05, 'checkpoint_manager_blocking_start_time': 1776954737.5018582, 'checkpoint_manager_blocking_duration_secs': 1.22520112991333} I0423 14:32:18.727210 132720895014720 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0423 14:32:18.727286 132720895014720 max_utils.py:750] Memstats: After params initialized: I0423 14:32:18.727342 132720895014720 max_utils.py:756] Using (GB) 0.45 / 31.25 (1.440000%) on TPU_0(process=0,(0,0,0,0)) I0423 14:32:18.727372 132720895014720 max_utils.py:756] Using (GB) 0.45 / 31.25 (1.440000%) on TPU_1(process=0,(1,0,0,0)) I0423 14:32:18.727397 132720895014720 max_utils.py:756] Using (GB) 0.45 / 31.25 (1.440000%) on TPU_4(process=0,(0,1,0,0)) I0423 14:32:18.727421 132720895014720 max_utils.py:756] Using (GB) 0.45 / 31.25 (1.440000%) on TPU_5(process=0,(1,1,0,0)) I0423 14:32:19.085392 132720895014720 metric_logger.py:196] completed step: 0, seconds: 13.976, TFLOP/s/device: 0.972, Tokens/s/device: 146.533, total_weights: 65536, loss: 10.872, lm_loss: 10.872, perplexity: 52680.742 I0423 14:32:19.088994 132720895014720 metric_logger.py:281] To see full metrics 'tensorboard --logdir=gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/tensorboard/' I0423 14:32:19.530663 132720895014720 metric_logger.py:196] completed step: 1, seconds: 1.739, TFLOP/s/device: 7.815, Tokens/s/device: 1177.894, total_weights: 65536, loss: 10.872, lm_loss: 10.872, perplexity: 52680.742 I0423 14:32:19.676761 132720895014720 metric_logger.py:196] completed step: 2, seconds: 0.447, TFLOP/s/device: 30.403, Tokens/s/device: 4582.681, total_weights: 65536, loss: 10.856, lm_loss: 10.856, perplexity: 51864.762 I0423 14:32:19.833719 132720895014720 metric_logger.py:196] completed step: 3, seconds: 0.018, TFLOP/s/device: 751.708, Tokens/s/device: 113305.671, total_weights: 65536, loss: 10.824, lm_loss: 10.824, perplexity: 50225.512 I0423 14:32:20.437756 132590445537024 checkpoint.py:188] Wrote Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776954739993613427, 'commit_timestamp_nsecs': None, 'custom_metadata': {}}, json={"item_handlers": null, "metrics": {}, "performance_metrics": {}, "init_timestamp_nsecs": 1776954739993613427, "commit_timestamp_nsecs": null, "custom_metadata": {}} to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/0/_CHECKPOINT_METADATA I0423 14:32:20.670472 132590983956224 atomicity.py:140] Creating tmp directory gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/0/items I0423 14:32:21.824865 2852 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0423 14:32:23.715182 132590967170816 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 153 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/0/items/array_metadatas/process_0 I0423 14:32:41.205755 132590958778112 base_pytree_checkpoint_handler.py:1282] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 19.385699s (commit=18.174843s, array_metadata_write=1.210855s) I0423 14:32:41.207141 132591009134336 base_pytree_checkpoint_handler.py:130] [process=0] /jax/orbax/write/gbytes_per_sec: 67.622 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 23.361706733703613 s) (per-host) I0423 14:32:41.207263 132591009134336 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 22.482489s. I0423 14:32:42.353886 132591009134336 checkpoint.py:228] Read Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776954739993613427, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} from gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/0/_CHECKPOINT_METADATA I0423 14:32:43.755728 132591009134336 ocdbt_utils.py:49] Param validation support for Zarr3 will be added later (b/362328389). I0423 14:32:43.892026 132720895014720 metric_logger.py:196] completed step: 4, seconds: 0.147, TFLOP/s/device: 92.365, Tokens/s/device: 13922.312, total_weights: 65536, loss: 10.793, lm_loss: 10.793, perplexity: 48689.156 I0423 14:32:43.906951 132720895014720 metric_logger.py:196] completed step: 5, seconds: 0.156, TFLOP/s/device: 86.922, Tokens/s/device: 13101.833, total_weights: 65536, loss: 10.763, lm_loss: 10.763, perplexity: 47229.012 I0423 14:32:44.058422 132720895014720 metric_logger.py:196] completed step: 6, seconds: 24.058, TFLOP/s/device: 0.565, Tokens/s/device: 85.129, total_weights: 65536, loss: 10.733, lm_loss: 10.733, perplexity: 45864.258 I0423 14:32:44.124404 132591009134336 array_metadata_store.py:411] [process=0][thread=async_save] Validated ArrayMetadata from all 8 hosts. Time taken: 0.001087s. I0423 14:32:44.131034 132590445537024 checkpoint.py:247] Updated Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776954739993613427, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/0/_CHECKPOINT_METADATA I0423 14:32:44.215494 132720895014720 metric_logger.py:196] completed step: 7, seconds: 0.013, TFLOP/s/device: 1031.203, Tokens/s/device: 155434.123, total_weights: 65536, loss: 10.706, lm_loss: 10.706, perplexity: 44620.242 I0423 14:32:44.372512 132720895014720 metric_logger.py:196] completed step: 8, seconds: 0.151, TFLOP/s/device: 90.131, Tokens/s/device: 13585.496, total_weights: 65536, loss: 10.680, lm_loss: 10.680, perplexity: 43477.055 I0423 14:32:44.382974 132720895014720 checkpointing.py:794] Waiting for step 10 to finish before checkpoint... I0423 14:32:44.686815 132720895014720 checkpointing.py:798] Waited 0.30381107330322266 seconds for step 10 to finish before starting checkpointing. I0423 14:32:44.689173 132720895014720 checkpoint_manager.py:2020] [process=0][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 14:32:44.716846 132591009134336 base_pytree_checkpoint_handler.py:1406] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 2.242672s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/0/items I0423 14:32:44.718629 132591009134336 atomicity.py:666] Finalizing gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/0/items I0423 14:32:45.235283 132591009134336 atomicity.py:666] Finalizing gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/0 I0423 14:32:46.604382 132591009134336 atomicity.py:847] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/0`. I0423 14:32:46.605243 132591009134336 event_tracking.py:138] [process=0] [async] Finished save (blocking + background) in 29.10 seconds @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/0 I0423 14:32:46.606785 132591009134336 async_checkpointer.py:160] [process=0][thread=async_save] Background save thread done. Time taken: 27.882009s. I0423 14:32:46.606990 132590472263424 async_checkpointer.py:288] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 14:32:46.607110 132590472263424 async_checkpointer.py:298] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0423 14:32:46.607172 132590472263424 checkpoint_manager.py:2137] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0423 14:32:46.609765 132590472263424 checkpoint_manager.py:2146] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0423 14:32:46.609906 132720895014720 checkpoint_manager.py:2032] [process=0][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0. W0423 14:32:46.609991 132720895014720 checkpoint_manager.py:1452] Waiting for previous save to complete took 1.920824 seconds. If this number is high, consider checkpointing less frequently. I0423 14:32:46.612265 132720895014720 checkpoint_manager.py:1512] [process=0] Saving checkpoint at step 10 I0423 14:32:46.614403 132720895014720 event_tracking.py:70] [process=0] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/10. I0423 14:32:47.342008 132720895014720 jax_array_handlers.py:360] Scheduling D2H of 153 prioritized jax.Array. I0423 14:32:47.342109 132720895014720 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 I0423 14:32:47.382052 132720895014720 base_pytree_checkpoint_handler.py:154] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.042416s I0423 14:32:47.382783 132720895014720 base_pytree_checkpoint_handler.py:130] [process=0] /jax/orbax/write/blocking_gbytes_per_sec: 25.533 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.060422658920288086 s) (per-host) I0423 14:32:47.382848 132720895014720 base_pytree_checkpoint_handler.py:768] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 0.060506s (batch_requests_ready=0.005744s, total_serialization_initiated=0.054096s, others=0.000666s) I0423 14:32:47.382929 132720895014720 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.064428s (all_items=0.000016s, per_item={'items': '0.00001621'}, temp_paths=0.064412) I0423 14:32:47.383587 132720895014720 event_tracking.py:125] [process=0] [async] Finished blocking save in 0.77 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/10. I0423 14:32:47.383923 132590472263424 async_checkpointer.py:76] [process=0][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 14:52:47.383883 I0423 14:32:47.385946 132720895014720 checkpoint_manager.py:1560] [process=0][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize I0423 14:32:47.386253 132589896443648 async_checkpointer.py:280] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0423 14:32:47.386394 132720895014720 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776954764.6891396, 'wait_for_prev_duration_secs': 1.9208238124847412, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776954766.6123054, 'checkpointer_blocking_duration_secs': 0.7717578411102295, 'get_old_steps_start_time': 1776954767.384088, 'get_old_steps_duration_secs': 3.123283386230469e-05, 'checkpoint_manager_blocking_start_time': 1776954764.687279, 'checkpoint_manager_blocking_duration_secs': 2.6990807056427} I0423 14:32:47.386566 132720895014720 checkpointing.py:409] Started an asynchronous checkpoint save for step 10 I0423 14:32:47.387208 132720895014720 metric_logger.py:196] completed step: 9, seconds: 0.157, TFLOP/s/device: 86.595, Tokens/s/device: 13052.567, total_weights: 65536, loss: 10.656, lm_loss: 10.656, perplexity: 42467.320 I0423 14:32:47.402743 132720895014720 metric_logger.py:196] completed step: 10, seconds: 0.157, TFLOP/s/device: 86.690, Tokens/s/device: 13066.891, total_weights: 65536, loss: 10.636, lm_loss: 10.636, perplexity: 41601.941 I0423 14:32:47.877994 132591009134336 atomicity.py:140] Creating tmp directory gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/10 I0423 14:32:47.890155 132720895014720 metric_logger.py:196] completed step: 11, seconds: 3.017, TFLOP/s/device: 4.504, Tokens/s/device: 678.892, total_weights: 65536, loss: 10.618, lm_loss: 10.618, perplexity: 40849.570 I0423 14:32:48.042129 132720895014720 metric_logger.py:196] completed step: 12, seconds: 0.489, TFLOP/s/device: 27.764, Tokens/s/device: 4184.853, total_weights: 65536, loss: 10.602, lm_loss: 10.602, perplexity: 40203.926 I0423 14:32:48.198847 132720895014720 metric_logger.py:196] completed step: 13, seconds: 0.010, TFLOP/s/device: 1306.078, Tokens/s/device: 196866.289, total_weights: 65536, loss: 10.588, lm_loss: 10.588, perplexity: 39652.145 I0423 14:32:48.355726 132720895014720 metric_logger.py:196] completed step: 14, seconds: 0.155, TFLOP/s/device: 87.843, Tokens/s/device: 13240.580, total_weights: 65536, loss: 10.577, lm_loss: 10.577, perplexity: 39212.879 I0423 14:32:48.512539 132720895014720 metric_logger.py:196] completed step: 15, seconds: 0.156, TFLOP/s/device: 87.057, Tokens/s/device: 13122.233, total_weights: 65536, loss: 10.568, lm_loss: 10.568, perplexity: 38879.223 I0423 14:32:48.669502 132720895014720 metric_logger.py:196] completed step: 16, seconds: 0.157, TFLOP/s/device: 86.809, Tokens/s/device: 13084.757, total_weights: 65536, loss: 10.562, lm_loss: 10.562, perplexity: 38619.105 I0423 14:32:48.826304 132720895014720 metric_logger.py:196] completed step: 17, seconds: 0.156, TFLOP/s/device: 86.841, Tokens/s/device: 13089.608, total_weights: 65536, loss: 10.556, lm_loss: 10.556, perplexity: 38395.816 I0423 14:32:48.983341 132720895014720 metric_logger.py:196] completed step: 18, seconds: 0.157, TFLOP/s/device: 86.587, Tokens/s/device: 13051.403, total_weights: 65536, loss: 10.552, lm_loss: 10.552, perplexity: 38236.652 I0423 14:32:49.142069 132720895014720 checkpointing.py:794] Waiting for step 19 to finish before checkpoint... I0423 14:32:49.143494 132720895014720 checkpointing.py:798] Waited 0.0014369487762451172 seconds for step 19 to finish before starting checkpointing. I0423 14:32:49.146095 132720895014720 checkpoint_manager.py:2020] [process=0][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 14:32:50.455962 132590460815104 atomicity.py:140] Creating tmp directory gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/10/items I0423 14:32:53.477093 132590420358912 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 153 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/10/items/array_metadatas/process_0 I0423 14:33:12.316863 132589904836352 base_pytree_checkpoint_handler.py:1282] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 20.655986s (commit=19.444351s, array_metadata_write=1.211634s) I0423 14:33:12.318139 132590472263424 base_pytree_checkpoint_handler.py:130] [process=0] /jax/orbax/write/gbytes_per_sec: 63.202 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 24.99575662612915 s) (per-host) I0423 14:33:12.318251 132590472263424 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 24.934216s. I0423 14:33:13.942189 132590472263424 array_metadata_store.py:411] [process=0][thread=async_save] Validated ArrayMetadata from all 8 hosts. Time taken: 0.000878s. I0423 14:33:14.089160 132590472263424 ocdbt_utils.py:49] Param validation support for Zarr3 will be added later (b/362328389). I0423 14:33:15.029169 132590472263424 base_pytree_checkpoint_handler.py:1406] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 1.924794s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/10/items I0423 14:33:15.030869 132590472263424 atomicity.py:666] Finalizing gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/10/items I0423 14:33:15.574783 132590472263424 atomicity.py:666] Finalizing gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/10 I0423 14:33:17.384059 132590472263424 atomicity.py:847] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/10`. I0423 14:33:17.384788 132590472263424 event_tracking.py:138] [process=0] [async] Finished save (blocking + background) in 30.77 seconds @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/10 I0423 14:33:17.386013 132590472263424 async_checkpointer.py:160] [process=0][thread=async_save] Background save thread done. Time taken: 30.001976s. I0423 14:33:17.386227 132589896443648 async_checkpointer.py:288] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 14:33:17.386343 132589896443648 async_checkpointer.py:298] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0423 14:33:17.386406 132589896443648 checkpoint_manager.py:2137] [process=0][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts... I0423 14:33:17.389103 132589896443648 checkpoint_manager.py:2146] [process=0][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts. I0423 14:33:17.389282 132720895014720 checkpoint_manager.py:2032] [process=0][thread=MainThread][step=10][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=10. W0423 14:33:17.389414 132720895014720 checkpoint_manager.py:1452] Waiting for previous save to complete took 28.243324 seconds. If this number is high, consider checkpointing less frequently. I0423 14:33:17.390945 132720895014720 checkpoint_manager.py:1512] [process=0] Saving checkpoint at step 19 I0423 14:33:17.393070 132720895014720 event_tracking.py:70] [process=0] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/19. I0423 14:33:17.696691 132720895014720 jax_array_handlers.py:360] Scheduling D2H of 153 prioritized jax.Array. I0423 14:33:17.696848 132720895014720 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 I0423 14:33:17.745778 132720895014720 base_pytree_checkpoint_handler.py:154] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.051428s I0423 14:33:17.746572 132720895014720 base_pytree_checkpoint_handler.py:130] [process=0] /jax/orbax/write/blocking_gbytes_per_sec: 22.404 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.06886076927185059 s) (per-host) I0423 14:33:17.746647 132720895014720 base_pytree_checkpoint_handler.py:768] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 0.068954s (batch_requests_ready=0.005248s, total_serialization_initiated=0.062974s, others=0.000732s) I0423 14:33:17.746735 132720895014720 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.072836s (all_items=0.000012s, per_item={'items': '0.00001168'}, temp_paths=0.072825) I0423 14:33:17.747433 132720895014720 event_tracking.py:125] [process=0] [async] Finished blocking save in 0.36 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/19. I0423 14:33:17.747805 132589904836352 async_checkpointer.py:76] [process=0][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 14:53:17.747761 I0423 14:33:17.923546 132590472263424 atomicity.py:140] Creating tmp directory gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/19 I0423 14:33:18.186308 132720895014720 checkpoint_manager.py:1560] [process=0][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize I0423 14:33:18.186753 132589896443648 async_checkpointer.py:280] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0423 14:33:18.186930 132720895014720 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776954769.146067, 'wait_for_prev_duration_secs': 28.243324279785156, 'time_between_consecutive_saves_sec': 2.536262273788452, 'checkpointer_blocking_start_time': 1776954797.3909845, 'checkpointer_blocking_duration_secs': 0.3569784164428711, 'get_old_steps_start_time': 1776954797.7479818, 'get_old_steps_duration_secs': 2.3603439331054688e-05, 'checkpoint_manager_blocking_start_time': 1776954769.1438427, 'checkpoint_manager_blocking_duration_secs': 29.04305362701416} I0423 14:33:18.187051 132720895014720 checkpointing.py:409] Started an asynchronous checkpoint save for step 19 I0423 14:33:18.187102 132720895014720 checkpoint_manager.py:2020] [process=0][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 14:33:19.981174 132591009134336 atomicity.py:140] Creating tmp directory gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/19/items I0423 14:33:22.956787 132590460815104 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 153 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/19/items/array_metadatas/process_0 I0423 14:33:41.579477 132590420358912 base_pytree_checkpoint_handler.py:1282] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 20.438482s (commit=19.236643s, array_metadata_write=1.201839s) I0423 14:33:41.580878 132589904836352 base_pytree_checkpoint_handler.py:130] [process=0] /jax/orbax/write/gbytes_per_sec: 66.091 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 23.90313744544983 s) (per-host) I0423 14:33:41.581003 132589904836352 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 23.833071s. I0423 14:33:42.991832 132589904836352 array_metadata_store.py:411] [process=0][thread=async_save] Validated ArrayMetadata from all 8 hosts. Time taken: 0.000575s. I0423 14:33:43.349599 132589904836352 ocdbt_utils.py:49] Param validation support for Zarr3 will be added later (b/362328389). I0423 14:33:44.471175 132589904836352 base_pytree_checkpoint_handler.py:1406] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 2.067461s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/19/items I0423 14:33:44.472885 132589904836352 atomicity.py:666] Finalizing gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/19/items I0423 14:33:44.990915 132589904836352 atomicity.py:666] Finalizing gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/19 I0423 14:33:46.378654 132589904836352 atomicity.py:847] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/19`. I0423 14:33:46.379489 132589904836352 event_tracking.py:138] [process=0] [async] Finished save (blocking + background) in 28.99 seconds @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_05_fp8/checkpoints/19 I0423 14:33:46.380855 132589904836352 async_checkpointer.py:160] [process=0][thread=async_save] Background save thread done. Time taken: 28.632919s. I0423 14:33:46.381013 132589896443648 async_checkpointer.py:288] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 14:33:46.381069 132589896443648 async_checkpointer.py:298] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0423 14:33:46.381126 132589896443648 checkpoint_manager.py:2137] [process=0][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts... I0423 14:33:46.383719 132589896443648 checkpoint_manager.py:2146] [process=0][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts. I0423 14:33:46.383899 132720895014720 checkpoint_manager.py:2032] [process=0][thread=MainThread][step=19][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=19. I0423 14:33:46.384090 132720895014720 checkpoint_manager.py:2009] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 14:33:46.385076 132720895014720 metric_logger.py:196] completed step: 19, seconds: 0.157, TFLOP/s/device: 86.596, Tokens/s/device: 13052.650, total_weights: 65536, loss: 10.549, lm_loss: 10.549, perplexity: 38125.074 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Thu Apr 23 14:33:58 UTC 2026 EXIT_CODE=0