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Timing Test Reference Updates
‹ 02_syntheticCase: 03_dropout04_int8 ›

Metrics: main (59e0f1759) vs feat/nnx-post-train-fixes (28b1e4a16)

Metricmain  59e0f1759feat/nnx-post-train-fixes  28b1e4a16Diff (feat/nnx-post-train-fixes − main)
Parameters1.104 billion1.104 billion—
Final loss6.98106.98100
TFLOP/s11.35411.324-0.03
Tok/s1814.71809.9-4.799
Avg s/step1.2721.294+0.022
Memory %1.311.310
JAX0.9.20.9.2—

Diff = branch value − main value. Green = branch improved. Red = branch regressed.

main  ·  59e0f1759  ·  main_20260425_071456  ·  full log 
XPK Start: Sat Apr 25 07:20:19 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. 
2026-04-25 07:20:44.686470: 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)
I0425 07:20:44.895111 140390170629952 max_utils.py:273] Attempting to initialize the jax distributed system...
I0425 07:20:53.937241 140390170629952 distributed.py:149] Starting JAX distributed service on [::]:8482
I0425 07:20:53.939524 140390170629952 distributed.py:172] Connecting to JAX distributed service on mt-03-dropout-963zw-slice-job-0-0.mt-03-dropout-963zw:8482
I0425 07:20:55.914268 140390170629952 max_utils.py:284] Jax distributed system initialized!
I0425 07:21:02.257855 140390170629952 max_utils.py:800] System Information: Jax Version: 0.9.2
I0425 07:21:02.257958 140390170629952 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0425 07:21:02.257998 140390170629952 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
I0425 07:21:02.258034 140390170629952 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0425 07:21:02.952807 140390170629952 maxtext_utils.py:1604] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1)
I0425 07:21:02.953090 140390170629952 checkpointing.py:677] Setting up checkpoint logger...
I0425 07:21:02.953162 140390170629952 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0425 07:21:02.953207 140390170629952 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0425 07:21:02.953548 140390170629952 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 0x7fae9af1fd40>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0425 07:21:05.794047 140390170629952 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0425 07:21:05.794309 140390170629952 checkpoint_manager.py:708] [process=6][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7f9a54246510>}, handler_registry=None
I0425 07:21:05.794550 140390170629952 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7f9a54246510>` 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`.
I0425 07:21:05.794599 140390170629952 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7f9a7c242cc0>` 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`.
I0425 07:21:05.794635 140390170629952 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 0x7f9a54246510>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7f9a54246510>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7f9a7c242cc0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7f9a7c242cc0>}).
I0425 07:21:05.794959 140390170629952 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0425 07:21:05.795027 140390170629952 async_checkpointer.py:192] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7f9a04769b20> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0425 07:21:06.519822 140390170629952 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_03_dropout/checkpoints
I0425 07:21:06.974756 140390170629952 checkpoint_manager.py:929] [process=6][thread=MainThread] CheckpointManager created,  primary_host=0, CheckpointManagerOptions=CheckpointManagerOptions(save_interval_steps=1, max_to_keep=None, keep_time_interval=None, keep_period=None, should_keep_fn=None, best_fn=None, best_mode='max', keep_checkpoints_without_metrics=True, step_prefix=None, step_format_fixed_length=None, step_name_format=None, create=True, cleanup_tmp_directories=False, save_on_steps=frozenset(), single_host_load_and_broadcast=False, todelete_subdir=None, todelete_full_path=None, enable_background_delete=False, read_only=False, enable_async_checkpointing=True, async_options=None, multiprocessing_options=MultiprocessingOptions(primary_host=0, active_processes=None, barrier_sync_key_prefix=None), should_save_fn=None, file_options=FileOptions(path_permission_mode=None), save_root_metadata=True, temporary_path_class=None, save_decision_policy=FixedIntervalPolicy(interval=10), preservation_policy=LatestN(n=None), prevent_write_metrics=False, enable_should_save_is_saving_in_progress_check=True, enable_per_process_directory_creation=False, lightweight_initialize=False), root_directory=gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_03_dropout/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7fad59632600>
I0425 07:21:06.974930 140390170629952 checkpointing.py:301] Checkpoint manager created!
I0425 07:21:07.324936 140390170629952 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,128,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0425 07:21:07.325055 140390170629952 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,128,2048]....................................... ('fsdp', None, None).
I0425 07:21:07.706725 140390170629952 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,128,2048]....................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn').
I0425 07:21:07.706823 140390170629952 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,128,2048]....................................... ('fsdp', None, None).
I0425 07:21:07.723530 140390170629952 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,128,2048]....................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn').
I0425 07:21:07.723590 140390170629952 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,128,2048]....................................... ('fsdp', None, None).
I0425 07:21:07.747732 140390170629952 attentions.py:1154] attentions/query Logical: bfloat16[32,128,16,128]..................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 07:21:07.747805 140390170629952 attentions.py:1154] attentions/query Physical: bfloat16[32,128,16,128]..................................... ('fsdp', None, None, None).
I0425 07:21:07.764520 140390170629952 attentions.py:1155] attentions/key Logical: bfloat16[32,128,16,128]..................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 07:21:07.764585 140390170629952 attentions.py:1155] attentions/key Physical: bfloat16[32,128,16,128]..................................... ('fsdp', None, None, None).
I0425 07:21:07.781364 140390170629952 attentions.py:1156] attentions/value Logical: bfloat16[32,128,16,128]..................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 07:21:07.781425 140390170629952 attentions.py:1156] attentions/value Physical: bfloat16[32,128,16,128]..................................... ('fsdp', None, None, None).
I0425 07:21:07.806515 140390170629952 attentions.py:1198] attentions/out Logical: bfloat16[32,128,16,128]..................................... ('activation_batch_attn', 'activation_length_attn', 'activation_heads', 'activation_kv').
I0425 07:21:07.806584 140390170629952 attentions.py:1198] attentions/out Physical: bfloat16[32,128,16,128]..................................... ('fsdp', None, None, None).
I0425 07:21:07.833819 140390170629952 linears.py:525] linears/x Logical: bfloat16[32,128,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0425 07:21:07.833888 140390170629952 linears.py:525] linears/x Physical: bfloat16[32,128,7168]....................................... ('fsdp', None, None).
I0425 07:21:08.055362 140390170629952 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0425 07:21:08.055476 140390170629952 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0425 07:21:09.525898 140390170629952 maxtext_utils.py:1707]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0425 07:21:09.526029 140390170629952 maxtext_utils.py:1707]  params/params/decoder/layers/mlp/wi_0/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0425 07:21:09.526083 140390170629952 maxtext_utils.py:1707]  params/params/decoder/layers/mlp/wi_1/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0425 07:21:09.526162 140390170629952 maxtext_utils.py:1707]  params/params/decoder/layers/mlp/wo/kernel
    Shape:     float32[7168,16,2048]
    Logical:   P('mlp', 'layers', 'embed')
    Physical:  (None, None, 'fsdp')
I0425 07:21:09.526221 140390170629952 maxtext_utils.py:1707]  params/params/decoder/layers/post_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0425 07:21:09.526262 140390170629952 maxtext_utils.py:1707]  params/params/decoder/layers/pre_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0425 07:21:09.526314 140390170629952 maxtext_utils.py:1707]  params/params/decoder/layers/self_attention/key/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   P('embed', 'layers', 'kv_heads', 'kv_head_dim')
    Physical:  ('fsdp', None, None, None)
I0425 07:21:09.526366 140390170629952 maxtext_utils.py:1707]  params/params/decoder/layers/self_attention/out/kernel
    Shape:     float32[16,16,128,2048]
    Logical:   P('heads', 'layers', 'kv', 'embed')
    Physical:  (None, None, None, 'fsdp')
I0425 07:21:09.526407 140390170629952 maxtext_utils.py:1707]  params/params/decoder/layers/self_attention/query/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   P('embed', 'layers', 'q_heads', 'kv')
    Physical:  ('fsdp', None, None, None)
I0425 07:21:09.526444 140390170629952 maxtext_utils.py:1707]  params/params/decoder/layers/self_attention/value/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   P('embed', 'layers', 'kv_heads', 'kv_head_dim')
    Physical:  ('fsdp', None, None, None)
I0425 07:21:09.526492 140390170629952 maxtext_utils.py:1707]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)

I0425 07:21:09.526541 140390170629952 maxtext_utils.py:1707]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')
I0425 07:21:10.050785 140390170629952 train.py:155] train/xent Logical: float32[32,128]............................................. ('activation_embed_and_logits_batch', 'activation_length').
I0425 07:21:10.050883 140390170629952 train.py:155] train/xent Physical: float32[32,128]............................................. ('fsdp', None).
I0425 07:21:10.066601 140390170629952 train.py:162] train/z_loss Logical: float32[32,128]............................................. ('activation_embed_and_logits_batch', 'activation_length').
I0425 07:21:10.066659 140390170629952 train.py:162] train/z_loss Physical: float32[32,128]............................................. ('fsdp', None).
I0425 07:21:13.682776 140390170629952 max_utils.py:791] Total memory size: 0.8 GB, Output size: 0.4 GB, Temp size: 0.4 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB.
I0425 07:21:13.683552 140390170629952 metric_logger.py:301] number parameters: 1.104 billion
I0425 07:21:18.243298 140390170629952 checkpointing.py:772] Waiting for step 0 to finish before checkpoint...
I0425 07:21:18.318222 140390170629952 checkpointing.py:776] Waited 0.0749046802520752 seconds for step 0 to finish before starting checkpointing.
I0425 07:21:18.320603 140390170629952 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0425 07:21:18.322906 140390170629952 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 0
I0425 07:21:18.324234 140390170629952 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_03_dropout/checkpoints/0.
I0425 07:21:18.623349 140390170629952 signaling_client.py:364] Using JaxDistributedSignalingClient
I0425 07:21:18.624282 140390170629952 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0425 07:21:18.624342 140390170629952 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
I0425 07:21:18.902518 140390170629952 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.279243s
I0425 07:21:18.902692 140390170629952 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.419 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2846674919128418 s) (per-host)
I0425 07:21:18.902746 140390170629952 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.284731s (batch_requests_ready=0.002229s, total_serialization_initiated=0.282430s, others=0.000071s)
I0425 07:21:18.902840 140390170629952 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.288963s (all_items=0.000017s, per_item={'items': '0.00001740'}, temp_paths=0.288945)
I0425 07:21:18.903664 140390170629952 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.58 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_03_dropout/checkpoints/0.
I0425 07:21:18.903962 140261683451648 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 07:41:18.903931
I0425 07:21:19.352221 140390170629952 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0425 07:21:19.352600 140261111879424 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0425 07:21:19.352764 140390170629952 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_03_dropout/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777101678.3205843, 'wait_for_prev_duration_secs': 6.270408630371094e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777101678.322947, 'checkpointer_blocking_duration_secs': 0.5811717510223389, 'get_old_steps_start_time': 1777101678.9041443, 'get_old_steps_duration_secs': 3.0040740966796875e-05, 'checkpoint_manager_blocking_start_time': 1777101678.3187644, 'checkpoint_manager_blocking_duration_secs': 1.0339574813842773}
I0425 07:21:19.352874 140390170629952 checkpointing.py:408] Started an asynchronous checkpoint save for step 0
I0425 07:21:19.352930 140390170629952 max_utils.py:750] 
Memstats: After params initialized:
I0425 07:21:19.352989 140390170629952 max_utils.py:756] 	Using (GB) 0.41 / 31.25 (1.312000%) on TPU_24(process=6,(0,6,0,0))
I0425 07:21:19.353022 140390170629952 max_utils.py:756] 	Using (GB) 0.41 / 31.25 (1.312000%) on TPU_25(process=6,(1,6,0,0))
I0425 07:21:19.353049 140390170629952 max_utils.py:756] 	Using (GB) 0.41 / 31.25 (1.312000%) on TPU_28(process=6,(0,7,0,0))
I0425 07:21:19.353075 140390170629952 max_utils.py:756] 	Using (GB) 0.41 / 31.25 (1.312000%) on TPU_29(process=6,(1,7,0,0))
I0425 07:21:19.672222 140390170629952 metric_logger.py:196] completed step: 0, seconds: 4.560, TFLOP/s/device: 0.176, Tokens/s/device: 28.072, total_weights: 4096, loss: 10.889, lm_loss: 10.889, perplexity: 53560.699
I0425 07:21:19.770174 140390170629952 metric_logger.py:196] completed step: 1, seconds: 1.427, TFLOP/s/device: 0.561, Tokens/s/device: 89.674, total_weights: 4096, loss: 10.902, lm_loss: 10.902, perplexity: 54298.523
I0425 07:21:20.167889 140390170629952 metric_logger.py:196] completed step: 2, seconds: 0.028, TFLOP/s/device: 28.893, Tokens/s/device: 4617.771, total_weights: 4096, loss: 9.956, lm_loss: 9.956, perplexity: 21082.051
I0425 07:21:20.238533 140390170629952 metric_logger.py:196] completed step: 3, seconds: 0.399, TFLOP/s/device: 2.007, Tokens/s/device: 320.841, total_weights: 4096, loss: 9.139, lm_loss: 9.139, perplexity: 9314.691
I0425 07:21:20.380358 140390170629952 metric_logger.py:196] completed step: 4, seconds: 0.075, TFLOP/s/device: 10.681, Tokens/s/device: 1707.054, total_weights: 4096, loss: 8.459, lm_loss: 8.459, perplexity: 4715.493
I0425 07:21:20.386507 140390170629952 metric_logger.py:196] completed step: 5, seconds: 0.071, TFLOP/s/device: 11.235, Tokens/s/device: 1795.584, total_weights: 4096, loss: 7.924, lm_loss: 7.924, perplexity: 2762.373
I0425 07:21:21.983175    2788 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0425 07:21:23.993351 140261120272128 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_03_dropout/checkpoints/0/items/array_metadatas/process_6
I0425 07:21:29.613523 140390170629952 metric_logger.py:196] completed step: 6, seconds: 0.142, TFLOP/s/device: 5.644, Tokens/s/device: 902.056, total_weights: 4096, loss: 7.553, lm_loss: 7.553, perplexity: 1906.617
I0425 07:21:29.684189 140390170629952 metric_logger.py:196] completed step: 7, seconds: 9.158, TFLOP/s/device: 0.087, Tokens/s/device: 13.977, total_weights: 4096, loss: 7.267, lm_loss: 7.267, perplexity: 1431.653
I0425 07:21:29.754827 140390170629952 metric_logger.py:196] completed step: 8, seconds: 0.075, TFLOP/s/device: 10.722, Tokens/s/device: 1713.635, total_weights: 4096, loss: 7.111, lm_loss: 7.111, perplexity: 1225.983
I0425 07:21:29.824877 140390170629952 checkpointing.py:772] Waiting for step 9 to finish before checkpoint...
I0425 07:21:29.825550 140390170629952 checkpointing.py:776] Waited 0.0006933212280273438 seconds for step 9 to finish before starting checkpointing.
I0425 07:21:29.827609 140390170629952 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0425 07:21:51.247332 140261683451648 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 48.410 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 32.629258155822754 s) (per-host)
I0425 07:21:51.247457 140261683451648 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 32.343384s.
I0425 07:21:58.931498 140261683451648 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 40.027407s.
I0425 07:21:58.931768 140261111879424 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0425 07:21:58.931897 140261111879424 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0425 07:21:58.931949 140261111879424 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0425 07:21:58.933577 140261111879424 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0425 07:21:58.933748 140390170629952 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0425 07:21:58.933881 140390170629952 checkpoint_manager.py:1452] Waiting for previous save to complete took 29.106269 seconds. If this number is high, consider checkpointing less frequently.
I0425 07:21:58.935819 140390170629952 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 9
I0425 07:21:58.937827 140390170629952 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_03_dropout/checkpoints/9.
I0425 07:21:59.233667 140390170629952 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0425 07:21:59.233764 140390170629952 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
I0425 07:21:59.270801 140390170629952 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.038932s
I0425 07:21:59.270971 140390170629952 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 36.394 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04238486289978027 s) (per-host)
I0425 07:21:59.271023 140390170629952 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.042446s (batch_requests_ready=0.001807s, total_serialization_initiated=0.040570s, others=0.000069s)
I0425 07:21:59.271134 140390170629952 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.046740s (all_items=0.000015s, per_item={'items': '0.00001478'}, temp_paths=0.046725)
I0425 07:21:59.271816 140390170629952 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.34 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_03_dropout/checkpoints/9.
I0425 07:21:59.272157 140261111879424 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 07:41:59.272122
I0425 07:21:59.274038 140390170629952 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0425 07:21:59.274321 140255202092800 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0425 07:21:59.274480 140390170629952 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_03_dropout/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777101689.8275807, 'wait_for_prev_duration_secs': 29.106268882751465, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777101718.9358585, 'checkpointer_blocking_duration_secs': 0.33645081520080566, 'get_old_steps_start_time': 1777101719.2723317, 'get_old_steps_duration_secs': 2.9087066650390625e-05, 'checkpoint_manager_blocking_start_time': 1777101689.8257768, 'checkpoint_manager_blocking_duration_secs': 29.44866943359375}
I0425 07:21:59.274594 140390170629952 checkpointing.py:408] Started an asynchronous checkpoint save for step 9
I0425 07:21:59.274642 140390170629952 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0425 07:22:04.734699 140237703386880 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_03_dropout/checkpoints/9/items/array_metadatas/process_6
I0425 07:22:39.949577 140261111879424 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 38.791 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 40.720954179763794 s) (per-host)
I0425 07:22:39.949693 140261111879424 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 40.677418s.
I0425 07:22:48.287503 140261111879424 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 49.015207s.
I0425 07:22:48.287778 140255202092800 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0425 07:22:48.287894 140255202092800 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0425 07:22:48.287944 140255202092800 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0425 07:22:48.289530 140255202092800 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0425 07:22:48.289730 140390170629952 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0425 07:22:48.289877 140390170629952 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0425 07:22:48.290798 140390170629952 metric_logger.py:196] completed step: 9, seconds: 0.071, TFLOP/s/device: 11.354, Tokens/s/device: 1814.728, total_weights: 4096, loss: 6.981, lm_loss: 6.981, perplexity: 1075.867
Per train step:
 Total TFLOPs: 0.80 
 split as 99.60% learnable weight flops and 0.40% attention flops
XPK End: Sat Apr 25 07:23:00 UTC 2026
EXIT_CODE=0
feat/nnx-post-train-fixes  ·  28b1e4a16  ·  feat_nnx_post_train_fixes_20260425_121355  ·  full log 
XPK Start: Sat Apr 25 12:19:14 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. 
2026-04-25 12:19:39.380528: 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)
I0425 12:19:39.594355 137408453248832 max_utils.py:273] Attempting to initialize the jax distributed system...
I0425 12:19:48.634857 137408453248832 distributed.py:149] Starting JAX distributed service on [::]:8482
I0425 12:19:48.637173 137408453248832 distributed.py:172] Connecting to JAX distributed service on mt-03-dropout-8lrku-slice-job-0-0.mt-03-dropout-8lrku:8482
I0425 12:19:49.948701 137408453248832 max_utils.py:284] Jax distributed system initialized!
I0425 12:19:55.876113 137408453248832 max_utils.py:800] System Information: Jax Version: 0.9.2
I0425 12:19:55.876217 137408453248832 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0425 12:19:55.876258 137408453248832 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
I0425 12:19:55.876296 137408453248832 train_utils.py:391] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0425 12:19:56.568086 137408453248832 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0425 12:19:56.568666 137408453248832 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0425 12:19:56.568858 137408453248832 checkpointing.py:688] Setting up checkpoint logger...
I0425 12:19:56.568909 137408453248832 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True
I0425 12:19:56.568967 137408453248832 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0425 12:19:56.569310 137408453248832 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 0x7cf84d114710>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0425 12:19:59.446663 137408453248832 checkpointing.py:266] Enabling policy for fixed interval checkpointing.
I0425 12:19:59.447037 137408453248832 checkpoint_manager.py:708] [process=3][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ce42c0c3bf0>}, handler_registry=None
I0425 12:19:59.447280 137408453248832 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ce42c0c3bf0>` 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`.
I0425 12:19:59.447331 137408453248832 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ce42c0c27b0>` 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`.
I0425 12:19:59.447366 137408453248832 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 0x7ce42c0c3bf0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ce42c0c3bf0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ce42c0c27b0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ce42c0c27b0>}).
I0425 12:19:59.447683 137408453248832 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0425 12:19:59.447760 137408453248832 async_checkpointer.py:192] [process=3][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7ce40c5b9e40> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0425 12:20:00.399655 137408453248832 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260425_121355/linen_xpk_feat_nnx_post_train_fixes_20260425_121355_03_dropout/checkpoints
I0425 12:20:00.442504 137408453248832 checkpoint_manager.py:929] [process=3][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_20260425_121355/linen_xpk_feat_nnx_post_train_fixes_20260425_121355_03_dropout/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7ce42c225640>
I0425 12:20:00.442650 137408453248832 checkpointing.py:302] Checkpoint manager created!
I0425 12:20:00.797579 137408453248832 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,128,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0425 12:20:00.797689 137408453248832 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,128,2048]....................................... ('fsdp', None, None).
I0425 12:20:01.181838 137408453248832 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,128,2048]....................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn').
I0425 12:20:01.181944 137408453248832 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,128,2048]....................................... ('fsdp', None, None).
I0425 12:20:01.198559 137408453248832 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,128,2048]....................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn').
I0425 12:20:01.198616 137408453248832 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,128,2048]....................................... ('fsdp', None, None).
I0425 12:20:01.222473 137408453248832 attentions.py:1154] attentions/query Logical: bfloat16[32,128,16,128]..................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 12:20:01.222544 137408453248832 attentions.py:1154] attentions/query Physical: bfloat16[32,128,16,128]..................................... ('fsdp', None, None, None).
I0425 12:20:01.239321 137408453248832 attentions.py:1155] attentions/key Logical: bfloat16[32,128,16,128]..................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 12:20:01.239384 137408453248832 attentions.py:1155] attentions/key Physical: bfloat16[32,128,16,128]..................................... ('fsdp', None, None, None).
I0425 12:20:01.256202 137408453248832 attentions.py:1156] attentions/value Logical: bfloat16[32,128,16,128]..................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 12:20:01.256267 137408453248832 attentions.py:1156] attentions/value Physical: bfloat16[32,128,16,128]..................................... ('fsdp', None, None, None).
I0425 12:20:01.281464 137408453248832 attentions.py:1198] attentions/out Logical: bfloat16[32,128,16,128]..................................... ('activation_batch_attn', 'activation_length_attn', 'activation_heads', 'activation_kv').
I0425 12:20:01.281533 137408453248832 attentions.py:1198] attentions/out Physical: bfloat16[32,128,16,128]..................................... ('fsdp', None, None, None).
I0425 12:20:01.308413 137408453248832 linears.py:525] linears/x Logical: bfloat16[32,128,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0425 12:20:01.308483 137408453248832 linears.py:525] linears/x Physical: bfloat16[32,128,7168]....................................... ('fsdp', None, None).
I0425 12:20:01.539790 137408453248832 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint
I0425 12:20:01.539903 137408453248832 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0425 12:20:03.015585 137408453248832 maxtext_utils.py:1880]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0425 12:20:03.015716 137408453248832 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)
I0425 12:20:03.015769 137408453248832 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)
I0425 12:20:03.015828 137408453248832 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')
I0425 12:20:03.015883 137408453248832 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)
I0425 12:20:03.015923 137408453248832 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)
I0425 12:20:03.015993 137408453248832 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)
I0425 12:20:03.016049 137408453248832 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')
I0425 12:20:03.016088 137408453248832 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)
I0425 12:20:03.016124 137408453248832 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)
I0425 12:20:03.016171 137408453248832 maxtext_utils.py:1880]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)

I0425 12:20:03.016221 137408453248832 maxtext_utils.py:1880]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')
I0425 12:20:03.543471 137408453248832 train.py:157] train/xent Logical: float32[32,128]............................................. ('activation_embed_and_logits_batch', 'activation_length').
I0425 12:20:03.543569 137408453248832 train.py:157] train/xent Physical: float32[32,128]............................................. ('fsdp', None).
I0425 12:20:03.559484 137408453248832 train.py:164] train/z_loss Logical: float32[32,128]............................................. ('activation_embed_and_logits_batch', 'activation_length').
I0425 12:20:03.559552 137408453248832 train.py:164] train/z_loss Physical: float32[32,128]............................................. ('fsdp', None).
I0425 12:20:07.134032 137408453248832 max_utils.py:791] Total memory size: 0.8 GB, Output size: 0.4 GB, Temp size: 0.4 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB.
I0425 12:20:07.134804 137408453248832 metric_logger.py:301] number parameters: 1.104 billion
I0425 12:20:11.717312 137408453248832 checkpointing.py:794] Waiting for step 0 to finish before checkpoint...
I0425 12:20:11.791558 137408453248832 checkpointing.py:798] Waited 0.07423543930053711 seconds for step 0 to finish before starting checkpointing.
I0425 12:20:11.794080 137408453248832 checkpoint_manager.py:2009] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0425 12:20:11.795972 137408453248832 checkpoint_manager.py:1512] [process=3] Saving checkpoint at step 0
I0425 12:20:11.797530 137408453248832 event_tracking.py:70] [process=3] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260425_121355/linen_xpk_feat_nnx_post_train_fixes_20260425_121355_03_dropout/checkpoints/0.
I0425 12:20:12.081665 137408453248832 signaling_client.py:364] Using JaxDistributedSignalingClient
I0425 12:20:12.082568 137408453248832 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0425 12:20:12.082627 137408453248832 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
I0425 12:20:12.356773 137408453248832 base_pytree_checkpoint_handler.py:154] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.275181s
I0425 12:20:12.356976 137408453248832 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/blocking_gbytes_per_sec: 5.493 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2808101177215576 s) (per-host)
I0425 12:20:12.357035 137408453248832 base_pytree_checkpoint_handler.py:768] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.280881s (batch_requests_ready=0.002324s, total_serialization_initiated=0.278454s, others=0.000103s)
I0425 12:20:12.357132 137408453248832 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.285162s (all_items=0.000018s, per_item={'items': '0.00001836'}, temp_paths=0.285143)
I0425 12:20:12.357824 137408453248832 event_tracking.py:125] [process=3] [async] Finished blocking save in 0.56 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260425_121355/linen_xpk_feat_nnx_post_train_fixes_20260425_121355_03_dropout/checkpoints/0.
I0425 12:20:12.358150 137280402650880 async_checkpointer.py:76] [process=3][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 12:40:12.358111
I0425 12:20:12.808654 137408453248832 checkpoint_manager.py:1560] [process=3][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0425 12:20:12.809057 137278286456576 async_checkpointer.py:280] [process=3][thread=save_finalize] Waiting for background save thread=async_save.
I0425 12:20:12.809201 137408453248832 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260425_121355/linen_xpk_feat_nnx_post_train_fixes_20260425_121355_03_dropout/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777119611.7940607, 'wait_for_prev_duration_secs': 6.461143493652344e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777119611.7960103, 'checkpointer_blocking_duration_secs': 0.5622951984405518, 'get_old_steps_start_time': 1777119612.358328, 'get_old_steps_duration_secs': 2.7418136596679688e-05, 'checkpoint_manager_blocking_start_time': 1777119611.7920406, 'checkpoint_manager_blocking_duration_secs': 1.0171198844909668}
I0425 12:20:12.809368 137408453248832 checkpointing.py:409] Started an asynchronous checkpoint save for step 0
I0425 12:20:12.809420 137408453248832 max_utils.py:750] 
Memstats: After params initialized:
I0425 12:20:12.809484 137408453248832 max_utils.py:756] 	Using (GB) 0.41 / 31.25 (1.312000%) on TPU_10(process=3,(2,2,0,0))
I0425 12:20:12.809519 137408453248832 max_utils.py:756] 	Using (GB) 0.41 / 31.25 (1.312000%) on TPU_11(process=3,(3,2,0,0))
I0425 12:20:12.809547 137408453248832 max_utils.py:756] 	Using (GB) 0.41 / 31.25 (1.312000%) on TPU_14(process=3,(2,3,0,0))
I0425 12:20:12.809570 137408453248832 max_utils.py:756] 	Using (GB) 0.41 / 31.25 (1.312000%) on TPU_15(process=3,(3,3,0,0))
I0425 12:20:13.123554 137408453248832 metric_logger.py:196] completed step: 0, seconds: 4.582, TFLOP/s/device: 0.175, Tokens/s/device: 27.933, total_weights: 4096, loss: 10.889, lm_loss: 10.889, perplexity: 53560.699
I0425 12:20:13.227880 137408453248832 metric_logger.py:196] completed step: 1, seconds: 1.405, TFLOP/s/device: 0.570, Tokens/s/device: 91.115, total_weights: 4096, loss: 10.902, lm_loss: 10.902, perplexity: 54298.523
I0425 12:20:13.636857 137408453248832 metric_logger.py:196] completed step: 2, seconds: 0.034, TFLOP/s/device: 23.569, Tokens/s/device: 3766.922, total_weights: 4096, loss: 9.956, lm_loss: 9.956, perplexity: 21082.051
I0425 12:20:13.707434 137408453248832 metric_logger.py:196] completed step: 3, seconds: 0.409, TFLOP/s/device: 1.958, Tokens/s/device: 312.918, total_weights: 4096, loss: 9.139, lm_loss: 9.139, perplexity: 9314.691
I0425 12:20:13.849271 137408453248832 metric_logger.py:196] completed step: 4, seconds: 0.076, TFLOP/s/device: 10.514, Tokens/s/device: 1680.385, total_weights: 4096, loss: 8.459, lm_loss: 8.459, perplexity: 4715.493
I0425 12:20:13.855323 137408453248832 metric_logger.py:196] completed step: 5, seconds: 0.070, TFLOP/s/device: 11.364, Tokens/s/device: 1816.221, total_weights: 4096, loss: 7.924, lm_loss: 7.924, perplexity: 2762.373
I0425 12:20:15.804663    2798 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0425 12:20:17.798741 137278294849280 array_metadata_store.py:203] [process=3][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260425_121355/linen_xpk_feat_nnx_post_train_fixes_20260425_121355_03_dropout/checkpoints/0/items/array_metadatas/process_3
I0425 12:20:23.283257 137408453248832 metric_logger.py:196] completed step: 6, seconds: 0.143, TFLOP/s/device: 5.620, Tokens/s/device: 898.201, total_weights: 4096, loss: 7.553, lm_loss: 7.553, perplexity: 1906.617
I0425 12:20:23.354088 137408453248832 metric_logger.py:196] completed step: 7, seconds: 9.359, TFLOP/s/device: 0.086, Tokens/s/device: 13.677, total_weights: 4096, loss: 7.267, lm_loss: 7.267, perplexity: 1431.653
I0425 12:20:23.424733 137408453248832 metric_logger.py:196] completed step: 8, seconds: 0.075, TFLOP/s/device: 10.711, Tokens/s/device: 1711.917, total_weights: 4096, loss: 7.111, lm_loss: 7.111, perplexity: 1225.983
I0425 12:20:23.494609 137408453248832 checkpointing.py:794] Waiting for step 9 to finish before checkpoint...
I0425 12:20:23.495262 137408453248832 checkpointing.py:798] Waited 0.0006711483001708984 seconds for step 9 to finish before starting checkpointing.
I0425 12:20:23.497328 137408453248832 checkpoint_manager.py:2020] [process=3][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0425 12:20:44.053994 137280402650880 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/gbytes_per_sec: 49.397 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 31.977768182754517 s) (per-host)
I0425 12:20:44.054116 137280402650880 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 31.695848s.
I0425 12:20:54.205333 137280402650880 async_checkpointer.py:160] [process=3][thread=async_save] Background save thread done. Time taken: 41.847047s.
I0425 12:20:54.205576 137278286456576 async_checkpointer.py:288] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save.
I0425 12:20:54.205642 137278286456576 async_checkpointer.py:298] [process=3][thread=save_finalize] No errors found in background save thread=async_save.
I0425 12:20:54.205705 137278286456576 checkpoint_manager.py:2137] [process=3][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0425 12:20:54.208006 137278286456576 checkpoint_manager.py:2146] [process=3][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0425 12:20:54.208179 137408453248832 checkpoint_manager.py:2032] [process=3][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0425 12:20:54.208313 137408453248832 checkpoint_manager.py:1452] Waiting for previous save to complete took 30.710984 seconds. If this number is high, consider checkpointing less frequently.
I0425 12:20:54.210202 137408453248832 checkpoint_manager.py:1512] [process=3] Saving checkpoint at step 9
I0425 12:20:54.212285 137408453248832 event_tracking.py:70] [process=3] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260425_121355/linen_xpk_feat_nnx_post_train_fixes_20260425_121355_03_dropout/checkpoints/9.
I0425 12:20:54.930580 137408453248832 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0425 12:20:54.930673 137408453248832 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
I0425 12:20:54.965905 137408453248832 base_pytree_checkpoint_handler.py:154] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.036295s
I0425 12:20:54.966083 137408453248832 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/blocking_gbytes_per_sec: 38.617 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.03994560241699219 s) (per-host)
I0425 12:20:54.966133 137408453248832 base_pytree_checkpoint_handler.py:768] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.040006s (batch_requests_ready=0.001946s, total_serialization_initiated=0.037994s, others=0.000066s)
I0425 12:20:54.966225 137408453248832 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.044222s (all_items=0.000016s, per_item={'items': '0.00001621'}, temp_paths=0.044205)
I0425 12:20:54.966964 137408453248832 event_tracking.py:125] [process=3] [async] Finished blocking save in 0.76 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260425_121355/linen_xpk_feat_nnx_post_train_fixes_20260425_121355_03_dropout/checkpoints/9.
I0425 12:20:54.967297 137278286456576 async_checkpointer.py:76] [process=3][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 12:40:54.967260
I0425 12:20:54.969332 137408453248832 checkpoint_manager.py:1560] [process=3][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0425 12:20:54.969553 137279882319616 async_checkpointer.py:280] [process=3][thread=save_finalize] Waiting for background save thread=async_save.
I0425 12:20:54.969667 137408453248832 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260425_121355/linen_xpk_feat_nnx_post_train_fixes_20260425_121355_03_dropout/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777119623.4972982, 'wait_for_prev_duration_secs': 30.710983753204346, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777119654.2102432, 'checkpointer_blocking_duration_secs': 0.7571992874145508, 'get_old_steps_start_time': 1777119654.967467, 'get_old_steps_duration_secs': 2.956390380859375e-05, 'checkpoint_manager_blocking_start_time': 1777119623.4954832, 'checkpoint_manager_blocking_duration_secs': 31.474148750305176}
I0425 12:20:54.969777 137408453248832 checkpointing.py:409] Started an asynchronous checkpoint save for step 9
I0425 12:20:54.969820 137408453248832 checkpoint_manager.py:2020] [process=3][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0425 12:21:00.241717 137255951697664 array_metadata_store.py:203] [process=3][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260425_121355/linen_xpk_feat_nnx_post_train_fixes_20260425_121355_03_dropout/checkpoints/9/items/array_metadatas/process_3
I0425 12:21:34.825131 137278286456576 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/gbytes_per_sec: 39.590 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 39.89895009994507 s) (per-host)
I0425 12:21:34.825255 137278286456576 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 39.857846s.
I0425 12:21:43.247974 137278286456576 async_checkpointer.py:160] [process=3][thread=async_save] Background save thread done. Time taken: 48.280548s.
I0425 12:21:43.248213 137279882319616 async_checkpointer.py:288] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save.
I0425 12:21:43.248285 137279882319616 async_checkpointer.py:298] [process=3][thread=save_finalize] No errors found in background save thread=async_save.
I0425 12:21:43.248334 137279882319616 checkpoint_manager.py:2137] [process=3][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0425 12:21:43.250942 137279882319616 checkpoint_manager.py:2146] [process=3][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0425 12:21:43.251105 137408453248832 checkpoint_manager.py:2032] [process=3][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0425 12:21:43.251255 137408453248832 checkpoint_manager.py:2009] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0425 12:21:43.252230 137408453248832 metric_logger.py:196] completed step: 9, seconds: 0.071, TFLOP/s/device: 11.324, Tokens/s/device: 1809.929, total_weights: 4096, loss: 6.981, lm_loss: 6.981, perplexity: 1075.867
Per train step:
 Total TFLOPs: 0.80 
 split as 99.60% learnable weight flops and 0.40% attention flops
XPK End: Sat Apr 25 12:21:54 UTC 2026
EXIT_CODE=0