MaxView

Timing Test Reference Updates
‹ 16_zarr3_false_saveCase: 16_zarr3_true_resume16_zarr3_true_save ›

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 loss5.39105.39100
TFLOP/s92.19592.251+0.056
Tok/s13896.613905.1+8.491
Avg s/step8.4068.505+0.099
Memory %1.381.380
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 08:29:24 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 08:29:49.180829: 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 08:29:49.384943 138468346181440 max_utils.py:273] Attempting to initialize the jax distributed system...
I0425 08:29:58.425435 138468346181440 distributed.py:149] Starting JAX distributed service on [::]:8482
I0425 08:29:58.428014 138468346181440 distributed.py:172] Connecting to JAX distributed service on mt-16-zarr3-true-rs-uln7e-slice-job-0-0.mt-16-zarr3-true-rs-uln7e:8482
I0425 08:29:59.480324 138468346181440 max_utils.py:284] Jax distributed system initialized!
I0425 08:30:04.900868 138468346181440 max_utils.py:800] System Information: Jax Version: 0.9.2
I0425 08:30:04.900977 138468346181440 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0425 08:30:04.901017 138468346181440 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 08:30:04.901052 138468346181440 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0425 08:30:05.595171 138468346181440 maxtext_utils.py:1604] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1)
I0425 08:30:05.595451 138468346181440 checkpointing.py:677] Setting up checkpoint logger...
I0425 08:30:05.595506 138468346181440 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0425 08:30:05.595555 138468346181440 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0425 08:30:05.595902 138468346181440 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 0x7def0b9193d0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0425 08:30:06.899710 138468346181440 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0425 08:30:06.899947 138468346181440 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 0x7ddb5c0bc1d0>}, handler_registry=None
I0425 08:30:06.900207 138468346181440 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ddb5c0bc1d0>` 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 08:30:06.900258 138468346181440 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ddb5c0be3c0>` 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 08:30:06.900295 138468346181440 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 0x7ddb5c0bc1d0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ddb5c0bc1d0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ddb5c0be3c0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ddb5c0be3c0>}).
I0425 08:30:06.900635 138468346181440 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0425 08:30:06.900705 138468346181440 async_checkpointer.py:192] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7ddb3c4cda80> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0425 08:30:08.438500 138349251639040 checkpoint.py:228] Read Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1777105598494766318, 'commit_timestamp_nsecs': 1777105644277983871, 'custom_metadata': {}} from gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_16_zarr3_true/checkpoints/5/_CHECKPOINT_METADATA
I0425 08:30:08.692321 138349251639040 checkpoint_manager.py:1871] Missing metrics for step 5
I0425 08:30:08.713970 138468346181440 checkpoint_manager.py:1812] Found 3 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_16_zarr3_true/checkpoints
I0425 08:30:09.376235 138468346181440 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=5), 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_16_zarr3_true/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7ddb5c0bb230>
I0425 08:30:09.376409 138468346181440 checkpointing.py:301] Checkpoint manager created!
I0425 08:30:10.305882 138468346181440 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0425 08:30:10.306004 138468346181440 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0425 08:30:10.688783 138468346181440 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn').
I0425 08:30:10.688897 138468346181440 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0425 08:30:10.705762 138468346181440 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn').
I0425 08:30:10.705822 138468346181440 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0425 08:30:10.729940 138468346181440 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 08:30:10.730011 138468346181440 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 08:30:10.746773 138468346181440 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 08:30:10.746836 138468346181440 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 08:30:10.763336 138468346181440 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 08:30:10.763395 138468346181440 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 08:30:10.788407 138468346181440 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch_attn', 'activation_length_attn', 'activation_heads', 'activation_kv').
I0425 08:30:10.788479 138468346181440 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 08:30:10.809831 138468346181440 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0425 08:30:10.809898 138468346181440 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0425 08:30:11.023308 138468346181440 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0425 08:30:11.023417 138468346181440 checkpointing.py:581] restoring from this run's directory step 9
I0425 08:30:11.275697 138468346181440 event_tracking.py:70] [process=6] [sync] Started load checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_16_zarr3_true/checkpoints/9.
I0425 08:30:11.517190 138468346181440 checkpointer.py:307] Restoring checkpoint from gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_16_zarr3_true/checkpoints/9.
I0425 08:30:11.517635 138468346181440 event_tracking.py:125] [process=6] [sync] Finished blocking load in 0.24 seconds. Continuing load @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_16_zarr3_true/checkpoints/9.
I0425 08:30:12.931375    1416 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0425 08:30:18.554903 138468346181440 jax_array_handlers.py:843] [process=6] /jax/orbax/read/worker/io/requested throughput: 280.723 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 5.629295587539673 s) (per-host)
I0425 08:30:18.572116 138468346181440 base_pytree_checkpoint_handler.py:130] [process=6] /jax/checkpoint/read/gbytes_per_sec: 261.052 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 6.062373161315918 s) (per-host)
I0425 08:30:19.911445 138468346181440 event_tracking.py:138] [process=6] [sync] Finished load in 8.64 seconds @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_16_zarr3_true/checkpoints/9
I0425 08:30:19.911616 138468346181440 standard_logger.py:34] {'step': 9, 'event_type': 'restore', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_16_zarr3_true/checkpoints', 'checkpointer_start_time': 1777105811.2755961, 'checkpointer_duration_secs': 8.635987281799316, 'checkpoint_manager_start_time': 1777105811.0236742, 'checkpoint_manager_duration_secs': 8.887911319732666}
fsdp: 32
I0425 08:30:20.332105 138468346181440 maxtext_utils.py:1707]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0425 08:30:20.332238 138468346181440 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 08:30:20.332293 138468346181440 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 08:30:20.332353 138468346181440 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 08:30:20.332407 138468346181440 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 08:30:20.332447 138468346181440 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 08:30:20.332499 138468346181440 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 08:30:20.332556 138468346181440 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 08:30:20.332597 138468346181440 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 08:30:20.332632 138468346181440 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 08:30:20.332677 138468346181440 maxtext_utils.py:1707]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)
I0425 08:30:20.332723 138468346181440 maxtext_utils.py:1707]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')

I0425 08:30:20.828829 138468346181440 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0425 08:30:20.828927 138468346181440 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0425 08:30:20.844599 138468346181440 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0425 08:30:20.844663 138468346181440 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0425 08:30:31.765109 138468346181440 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.
I0425 08:30:31.765895 138468346181440 metric_logger.py:301] number parameters: 1.104 billion
I0425 08:30:43.441798 138468346181440 checkpointing.py:772] Waiting for step 10 to finish before checkpoint...
I0425 08:30:43.598000 138468346181440 checkpointing.py:776] Waited 0.15617918968200684 seconds for step 10 to finish before starting checkpointing.
I0425 08:30:43.600456 138468346181440 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0425 08:30:43.602251 138468346181440 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 10
I0425 08:30:43.604153 138468346181440 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_16_zarr3_true/checkpoints/10.
I0425 08:30:43.926631 138468346181440 signaling_client.py:364] Using JaxDistributedSignalingClient
I0425 08:30:43.927575 138468346181440 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0425 08:30:43.927631 138468346181440 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 08:30:44.201082 138468346181440 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.274530s
I0425 08:30:44.201272 138468346181440 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.540 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2784237861633301 s) (per-host)
I0425 08:30:44.201326 138468346181440 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.278488s (batch_requests_ready=0.002156s, total_serialization_initiated=0.276259s, others=0.000073s)
I0425 08:30:44.201421 138468346181440 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.282604s (all_items=0.000017s, per_item={'items': '0.00001669'}, temp_paths=0.282588)
I0425 08:30:44.202249 138468346181440 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.60 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_16_zarr3_true/checkpoints/10.
I0425 08:30:44.202604 138348748338944 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 08:50:44.202565
I0425 08:30:44.221442 138468346181440 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize
I0425 08:30:44.221721 138345460004608 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0425 08:30:44.221874 138468346181440 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_16_zarr3_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777105843.6004372, 'wait_for_prev_duration_secs': 6.341934204101562e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777105843.602292, 'checkpointer_blocking_duration_secs': 0.6004681587219238, 'get_old_steps_start_time': 1777105844.2027829, 'get_old_steps_duration_secs': 3.266334533691406e-05, 'checkpoint_manager_blocking_start_time': 1777105843.5986075, 'checkpoint_manager_blocking_duration_secs': 0.6232302188873291}
I0425 08:30:44.221979 138468346181440 checkpointing.py:408] Started an asynchronous checkpoint save for step 10
I0425 08:30:44.222029 138468346181440 max_utils.py:750] 
Memstats: After params initialized:
I0425 08:30:44.222077 138468346181440 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0))
I0425 08:30:44.222127 138468346181440 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0))
I0425 08:30:44.222162 138468346181440 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0))
I0425 08:30:44.222186 138468346181440 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0))
I0425 08:30:44.532853 138468346181440 metric_logger.py:196] completed step: 10, seconds: 11.676, TFLOP/s/device: 1.164, Tokens/s/device: 175.406, total_weights: 65536, loss: 6.833, lm_loss: 6.833, perplexity: 927.869
I0425 08:30:44.715744 138468346181440 metric_logger.py:196] completed step: 11, seconds: 1.090, TFLOP/s/device: 12.471, Tokens/s/device: 1879.715, total_weights: 65536, loss: 6.527, lm_loss: 6.527, perplexity: 683.659
I0425 08:30:44.863286 138468346181440 metric_logger.py:196] completed step: 12, seconds: 0.036, TFLOP/s/device: 381.618, Tokens/s/device: 57521.627, total_weights: 65536, loss: 6.265, lm_loss: 6.265, perplexity: 526.068
I0425 08:30:45.010869 138468346181440 metric_logger.py:196] completed step: 13, seconds: 0.153, TFLOP/s/device: 88.603, Tokens/s/device: 13355.244, total_weights: 65536, loss: 6.045, lm_loss: 6.045, perplexity: 422.001
I0425 08:30:45.016428 138468346181440 checkpointing.py:772] Waiting for step 15 to finish before checkpoint...
I0425 08:30:45.304942 138468346181440 checkpointing.py:776] Waited 0.28847765922546387 seconds for step 15 to finish before starting checkpointing.
I0425 08:30:45.307965 138468346181440 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0425 08:30:49.172086 138345946519296 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_16_zarr3_true/checkpoints/10/items/array_metadatas/process_6
I0425 08:31:26.407128 138348748338944 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 37.181 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.48422956466675 s) (per-host)
I0425 08:31:26.407242 138348748338944 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.204525s.
I0425 08:31:34.359701 138348748338944 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 50.156968s.
I0425 08:31:34.360067 138345460004608 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0425 08:31:34.360204 138345460004608 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0425 08:31:34.360253 138345460004608 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts...
I0425 08:31:34.362588 138345460004608 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts.
I0425 08:31:34.362768 138468346181440 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=10][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=10.
W0425 08:31:34.362898 138468346181440 checkpoint_manager.py:1452] Waiting for previous save to complete took 49.054935 seconds. If this number is high, consider checkpointing less frequently.
I0425 08:31:34.364768 138468346181440 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 15
I0425 08:31:34.367168 138468346181440 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_16_zarr3_true/checkpoints/15.
I0425 08:31:34.652347 138468346181440 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0425 08:31:34.652441 138468346181440 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 08:31:34.678921 138468346181440 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.027735s
I0425 08:31:34.679117 138468346181440 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 49.409 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.031220674514770508 s) (per-host)
I0425 08:31:34.679177 138468346181440 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.031311s (batch_requests_ready=0.001791s, total_serialization_initiated=0.029421s, others=0.000098s)
I0425 08:31:34.679278 138468346181440 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.036250s (all_items=0.000013s, per_item={'items': '0.00001335'}, temp_paths=0.036237)
I0425 08:31:34.679880 138468346181440 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.32 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_16_zarr3_true/checkpoints/15.
I0425 08:31:34.680176 138342758864640 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 08:51:34.680142
I0425 08:31:34.691077 138468346181440 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=15] Starting CheckpointManager Save Finalize thread=save_finalize
I0425 08:31:34.691375 138345460004608 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0425 08:31:34.691548 138468346181440 standard_logger.py:34] {'step': 15, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_16_zarr3_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777105845.3079357, 'wait_for_prev_duration_secs': 49.054935455322266, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777105894.3648095, 'checkpointer_blocking_duration_secs': 0.3155231475830078, 'get_old_steps_start_time': 1777105894.680353, 'get_old_steps_duration_secs': 2.5987625122070312e-05, 'checkpoint_manager_blocking_start_time': 1777105845.3055995, 'checkpoint_manager_blocking_duration_secs': 49.38591170310974}
I0425 08:31:34.691659 138468346181440 checkpointing.py:408] Started an asynchronous checkpoint save for step 15
I0425 08:31:34.692573 138468346181440 metric_logger.py:196] completed step: 14, seconds: 0.147, TFLOP/s/device: 92.147, Tokens/s/device: 13889.454, total_weights: 65536, loss: 5.864, lm_loss: 5.864, perplexity: 352.193
I0425 08:31:34.699242 138468346181440 metric_logger.py:196] completed step: 15, seconds: 0.149, TFLOP/s/device: 91.462, Tokens/s/device: 13786.140, total_weights: 65536, loss: 5.719, lm_loss: 5.719, perplexity: 304.661
I0425 08:31:40.412063 138345946519296 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_16_zarr3_true/checkpoints/15/items/array_metadatas/process_6
I0425 08:31:55.670522 138468346181440 metric_logger.py:196] completed step: 16, seconds: 49.681, TFLOP/s/device: 0.273, Tokens/s/device: 41.223, total_weights: 65536, loss: 5.605, lm_loss: 5.605, perplexity: 271.872
I0425 08:31:55.817884 138468346181440 metric_logger.py:196] completed step: 17, seconds: 20.825, TFLOP/s/device: 0.652, Tokens/s/device: 98.342, total_weights: 65536, loss: 5.517, lm_loss: 5.517, perplexity: 248.975
I0425 08:31:55.965236 138468346181440 metric_logger.py:196] completed step: 18, seconds: 0.152, TFLOP/s/device: 89.310, Tokens/s/device: 13461.728, total_weights: 65536, loss: 5.448, lm_loss: 5.448, perplexity: 232.333
I0425 08:31:56.111902 138468346181440 checkpointing.py:772] Waiting for step 19 to finish before checkpoint...
I0425 08:31:56.112648 138468346181440 checkpointing.py:776] Waited 0.0007672309875488281 seconds for step 19 to finish before starting checkpointing.
I0425 08:31:56.114691 138468346181440 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=15][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0425 08:32:17.750363 138342758864640 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 36.647 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 43.1024489402771 s) (per-host)
I0425 08:32:17.750494 138342758864640 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 43.070200s.
I0425 08:32:25.185799 138342758864640 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 50.505488s.
I0425 08:32:25.186161 138345460004608 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0425 08:32:25.186312 138345460004608 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0425 08:32:25.186360 138345460004608 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=15] CheckpointManager Save Finalize is syncing with other hosts...
I0425 08:32:25.187811 138345460004608 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=15] CheckpointManager Save Finalize is done on all hosts.
I0425 08:32:25.187979 138468346181440 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=15][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=15.
W0425 08:32:25.188123 138468346181440 checkpoint_manager.py:1452] Waiting for previous save to complete took 29.073422 seconds. If this number is high, consider checkpointing less frequently.
I0425 08:32:25.189564 138468346181440 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 19
I0425 08:32:25.191682 138468346181440 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_16_zarr3_true/checkpoints/19.
I0425 08:32:25.583365 138468346181440 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0425 08:32:25.583456 138468346181440 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 08:32:25.609001 138468346181440 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.026422s
I0425 08:32:25.609194 138468346181440 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 51.555 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.02992105484008789 s) (per-host)
I0425 08:32:25.609250 138468346181440 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.029987s (batch_requests_ready=0.001639s, total_serialization_initiated=0.028277s, others=0.000071s)
I0425 08:32:25.609349 138468346181440 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.034090s (all_items=0.000010s, per_item={'items': '0.00001049'}, temp_paths=0.034079)
I0425 08:32:25.610085 138468346181440 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.42 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_16_zarr3_true/checkpoints/19.
I0425 08:32:25.610437 138343312520960 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 08:52:25.610400
I0425 08:32:25.613342 138468346181440 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize
I0425 08:32:25.613589 138345460004608 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0425 08:32:25.613727 138468346181440 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_16_zarr3_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777105916.114662, 'wait_for_prev_duration_secs': 29.0734224319458, 'time_between_consecutive_saves_sec': 21.752031803131104, 'checkpointer_blocking_start_time': 1777105945.189603, 'checkpointer_blocking_duration_secs': 0.4209866523742676, 'get_old_steps_start_time': 1777105945.6106083, 'get_old_steps_duration_secs': 2.6464462280273438e-05, 'checkpoint_manager_blocking_start_time': 1777105916.1128864, 'checkpoint_manager_blocking_duration_secs': 29.500807523727417}
I0425 08:32:25.613839 138468346181440 checkpointing.py:408] Started an asynchronous checkpoint save for step 19
I0425 08:32:25.613882 138468346181440 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0425 08:32:31.217622 138345946519296 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_16_zarr3_true/checkpoints/19/items/array_metadatas/process_6
I0425 08:33:07.425915 138343312520960 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 37.747 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.84660291671753 s) (per-host)
I0425 08:33:07.426041 138343312520960 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.815485s.
I0425 08:33:15.610469 138343312520960 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 49.999897s.
I0425 08:33:15.610760 138345460004608 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0425 08:33:15.610874 138345460004608 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0425 08:33:15.610915 138345460004608 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts...
I0425 08:33:15.612477 138345460004608 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts.
I0425 08:33:15.612645 138468346181440 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=19][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=19.
I0425 08:33:15.612795 138468346181440 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0425 08:33:15.613795 138468346181440 metric_logger.py:196] completed step: 19, seconds: 0.147, TFLOP/s/device: 92.195, Tokens/s/device: 13896.617, total_weights: 65536, loss: 5.391, lm_loss: 5.391, perplexity: 219.349
Per train step:
 Total TFLOPs: 13.59 
 split as 93.93% learnable weight flops and 6.07% attention flops
XPK End: Sat Apr 25 08:33:29 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 13:25:20 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 13:25:44.899961: 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 13:25:45.111771 136808779884352 max_utils.py:273] Attempting to initialize the jax distributed system...
I0425 13:25:54.153592 136808779884352 distributed.py:149] Starting JAX distributed service on [::]:8482
I0425 13:25:54.155962 136808779884352 distributed.py:172] Connecting to JAX distributed service on mt-16-zarr3-true-rs-9ppj0-slice-job-0-0.mt-16-zarr3-true-rs-9ppj0:8482
I0425 13:25:55.189024 136808779884352 max_utils.py:284] Jax distributed system initialized!
I0425 13:26:01.254081 136808779884352 max_utils.py:800] System Information: Jax Version: 0.9.2
I0425 13:26:01.254189 136808779884352 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0425 13:26:01.254231 136808779884352 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 13:26:01.254268 136808779884352 train_utils.py:391] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0425 13:26:01.950360 136808779884352 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0425 13:26:01.950966 136808779884352 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0425 13:26:01.951147 136808779884352 checkpointing.py:688] Setting up checkpoint logger...
I0425 13:26:01.951196 136808779884352 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True
I0425 13:26:01.951240 136808779884352 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0425 13:26:01.951571 136808779884352 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 0x7c6ca5b150d0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0425 13:26:03.218795 136808779884352 checkpointing.py:266] Enabling policy for fixed interval checkpointing.
I0425 13:26:03.219058 136808779884352 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 0x7c5860143500>}, handler_registry=None
I0425 13:26:03.219303 136808779884352 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7c5860143500>` 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 13:26:03.219353 136808779884352 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7c6b82c735c0>` 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 13:26:03.219397 136808779884352 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 0x7c5860143500>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7c5860143500>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7c6b82c735c0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7c6b82c735c0>}).
I0425 13:26:03.219734 136808779884352 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0425 13:26:03.219806 136808779884352 async_checkpointer.py:192] [process=3][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7c5828661e40> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0425 13:26:05.073254 136686780536576 checkpoint.py:228] Read Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1777123399223726455, 'commit_timestamp_nsecs': 1777123444033680869, 'custom_metadata': {}} from gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260425_121355/linen_xpk_feat_nnx_post_train_fixes_20260425_121355_16_zarr3_true/checkpoints/9/_CHECKPOINT_METADATA
I0425 13:26:05.325631 136686780536576 checkpoint_manager.py:1871] Missing metrics for step 9
I0425 13:26:05.352452 136808779884352 checkpoint_manager.py:1812] Found 3 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_16_zarr3_true/checkpoints
I0425 13:26:05.788229 136808779884352 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=5), 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_16_zarr3_true/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7c5860143e00>
I0425 13:26:05.788399 136808779884352 checkpointing.py:302] Checkpoint manager created!
I0425 13:26:06.736614 136808779884352 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0425 13:26:06.736788 136808779884352 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0425 13:26:07.115388 136808779884352 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn').
I0425 13:26:07.115482 136808779884352 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0425 13:26:07.132064 136808779884352 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn').
I0425 13:26:07.132123 136808779884352 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0425 13:26:07.156105 136808779884352 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 13:26:07.156173 136808779884352 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 13:26:07.172858 136808779884352 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 13:26:07.172916 136808779884352 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 13:26:07.189524 136808779884352 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 13:26:07.189586 136808779884352 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 13:26:07.214528 136808779884352 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch_attn', 'activation_length_attn', 'activation_heads', 'activation_kv').
I0425 13:26:07.214602 136808779884352 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 13:26:07.236475 136808779884352 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0425 13:26:07.236542 136808779884352 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0425 13:26:07.454076 136808779884352 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint
I0425 13:26:07.454184 136808779884352 checkpointing.py:582] restoring from this run's directory step 9
I0425 13:26:07.701292 136808779884352 event_tracking.py:70] [process=3] [sync] Started load checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260425_121355/linen_xpk_feat_nnx_post_train_fixes_20260425_121355_16_zarr3_true/checkpoints/9.
I0425 13:26:07.950065 136808779884352 checkpointer.py:307] Restoring checkpoint from gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260425_121355/linen_xpk_feat_nnx_post_train_fixes_20260425_121355_16_zarr3_true/checkpoints/9.
I0425 13:26:07.950503 136808779884352 event_tracking.py:125] [process=3] [sync] Finished blocking load in 0.25 seconds. Continuing load @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260425_121355/linen_xpk_feat_nnx_post_train_fixes_20260425_121355_16_zarr3_true/checkpoints/9.
I0425 13:26:09.341052    1464 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0425 13:26:15.370109 136808779884352 jax_array_handlers.py:843] [process=3] /jax/orbax/read/worker/io/requested throughput: 261.849 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 6.035050392150879 s) (per-host)
I0425 13:26:15.376095 136808779884352 base_pytree_checkpoint_handler.py:130] [process=3] /jax/checkpoint/read/gbytes_per_sec: 246.045 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 6.432142972946167 s) (per-host)
I0425 13:26:16.290092 136808779884352 event_tracking.py:138] [process=3] [sync] Finished load in 8.59 seconds @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260425_121355/linen_xpk_feat_nnx_post_train_fixes_20260425_121355_16_zarr3_true/checkpoints/9
I0425 13:26:16.290254 136808779884352 standard_logger.py:34] {'step': 9, 'event_type': 'restore', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260425_121355/linen_xpk_feat_nnx_post_train_fixes_20260425_121355_16_zarr3_true/checkpoints', 'checkpointer_start_time': 1777123567.7011936, 'checkpointer_duration_secs': 8.58902645111084, 'checkpoint_manager_start_time': 1777123567.4544277, 'checkpoint_manager_duration_secs': 8.835794925689697}
fsdp: 32
I0425 13:26:16.708167 136808779884352 maxtext_utils.py:1880]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0425 13:26:16.708334 136808779884352 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 13:26:16.708413 136808779884352 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 13:26:16.708508 136808779884352 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 13:26:16.708589 136808779884352 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 13:26:16.708634 136808779884352 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 13:26:16.708696 136808779884352 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 13:26:16.708751 136808779884352 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 13:26:16.708798 136808779884352 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 13:26:16.708862 136808779884352 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 13:26:16.708958 136808779884352 maxtext_utils.py:1880]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)

I0425 13:26:16.709029 136808779884352 maxtext_utils.py:1880]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')
I0425 13:26:17.205174 136808779884352 train.py:157] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0425 13:26:17.205271 136808779884352 train.py:157] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0425 13:26:17.221156 136808779884352 train.py:164] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0425 13:26:17.221216 136808779884352 train.py:164] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0425 13:26:28.338868 136808779884352 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.
I0425 13:26:28.339699 136808779884352 metric_logger.py:301] number parameters: 1.104 billion
I0425 13:26:39.779459 136808779884352 checkpointing.py:794] Waiting for step 10 to finish before checkpoint...
I0425 13:26:40.081400 136808779884352 checkpointing.py:798] Waited 0.30192136764526367 seconds for step 10 to finish before starting checkpointing.
I0425 13:26:40.084157 136808779884352 checkpoint_manager.py:2009] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0425 13:26:40.085941 136808779884352 checkpoint_manager.py:1512] [process=3] Saving checkpoint at step 10
I0425 13:26:40.087289 136808779884352 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_16_zarr3_true/checkpoints/10.
I0425 13:26:40.414846 136808779884352 signaling_client.py:364] Using JaxDistributedSignalingClient
I0425 13:26:40.415773 136808779884352 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0425 13:26:40.415830 136808779884352 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 13:26:40.693036 136808779884352 base_pytree_checkpoint_handler.py:154] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.278267s
I0425 13:26:40.693208 136808779884352 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/blocking_gbytes_per_sec: 5.465 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2822761535644531 s) (per-host)
I0425 13:26:40.693260 136808779884352 base_pytree_checkpoint_handler.py:768] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.282339s (batch_requests_ready=0.002337s, total_serialization_initiated=0.279932s, others=0.000070s)
I0425 13:26:40.693362 136808779884352 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.286576s (all_items=0.000018s, per_item={'items': '0.00001812'}, temp_paths=0.286558)
I0425 13:26:40.694142 136808779884352 event_tracking.py:125] [process=3] [async] Finished blocking save in 0.61 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_16_zarr3_true/checkpoints/10.
I0425 13:26:40.694438 136686746965760 async_checkpointer.py:76] [process=3][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 13:46:40.694400
I0425 13:26:40.698854 136808779884352 checkpoint_manager.py:1560] [process=3][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize
I0425 13:26:40.699110 136682703681280 async_checkpointer.py:280] [process=3][thread=save_finalize] Waiting for background save thread=async_save.
I0425 13:26:40.699262 136808779884352 standard_logger.py:34] {'step': 10, '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_16_zarr3_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777123600.084139, 'wait_for_prev_duration_secs': 6.246566772460938e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777123600.0859847, 'checkpointer_blocking_duration_secs': 0.6086122989654541, 'get_old_steps_start_time': 1777123600.694621, 'get_old_steps_duration_secs': 3.123283386230469e-05, 'checkpoint_manager_blocking_start_time': 1777123600.0819194, 'checkpoint_manager_blocking_duration_secs': 0.6173074245452881}
I0425 13:26:40.699365 136808779884352 checkpointing.py:409] Started an asynchronous checkpoint save for step 10
I0425 13:26:40.699413 136808779884352 max_utils.py:750] 
Memstats: After params initialized:
I0425 13:26:40.699459 136808779884352 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_10(process=3,(2,2,0,0))
I0425 13:26:40.699489 136808779884352 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_11(process=3,(3,2,0,0))
I0425 13:26:40.699515 136808779884352 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_14(process=3,(2,3,0,0))
I0425 13:26:40.699538 136808779884352 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_15(process=3,(3,3,0,0))
I0425 13:26:41.444519 136808779884352 metric_logger.py:196] completed step: 10, seconds: 11.440, TFLOP/s/device: 1.188, Tokens/s/device: 179.026, total_weights: 65536, loss: 6.833, lm_loss: 6.833, perplexity: 927.869
I0425 13:26:41.596954 136808779884352 metric_logger.py:196] completed step: 11, seconds: 1.663, TFLOP/s/device: 8.168, Tokens/s/device: 1231.160, total_weights: 65536, loss: 6.527, lm_loss: 6.527, perplexity: 683.659
I0425 13:26:41.744572 136808779884352 metric_logger.py:196] completed step: 12, seconds: 0.006, TFLOP/s/device: 2389.156, Tokens/s/device: 360119.571, total_weights: 65536, loss: 6.265, lm_loss: 6.265, perplexity: 526.068
I0425 13:26:41.891969 136808779884352 metric_logger.py:196] completed step: 13, seconds: 0.154, TFLOP/s/device: 88.406, Tokens/s/device: 13325.525, total_weights: 65536, loss: 6.045, lm_loss: 6.045, perplexity: 422.001
I0425 13:26:41.896406 136808779884352 checkpointing.py:794] Waiting for step 15 to finish before checkpoint...
I0425 13:26:42.185915 136808779884352 checkpointing.py:798] Waited 0.28947877883911133 seconds for step 15 to finish before starting checkpointing.
I0425 13:26:42.189141 136808779884352 checkpoint_manager.py:2020] [process=3][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0425 13:26:46.113128 136683186009856 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_16_zarr3_true/checkpoints/10/items/array_metadatas/process_3
I0425 13:27:21.502874 136686746965760 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/gbytes_per_sec: 38.441 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.09188723564148 s) (per-host)
I0425 13:27:21.503030 136686746965760 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 40.808477s.
I0425 13:27:31.395116 136686746965760 async_checkpointer.py:160] [process=3][thread=async_save] Background save thread done. Time taken: 50.700547s.
I0425 13:27:31.395376 136682703681280 async_checkpointer.py:288] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save.
I0425 13:27:31.395498 136682703681280 async_checkpointer.py:298] [process=3][thread=save_finalize] No errors found in background save thread=async_save.
I0425 13:27:31.395546 136682703681280 checkpoint_manager.py:2137] [process=3][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts...
I0425 13:27:31.396985 136682703681280 checkpoint_manager.py:2146] [process=3][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts.
I0425 13:27:31.397172 136808779884352 checkpoint_manager.py:2032] [process=3][thread=MainThread][step=10][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=10.
W0425 13:27:31.397315 136808779884352 checkpoint_manager.py:1452] Waiting for previous save to complete took 49.208175 seconds. If this number is high, consider checkpointing less frequently.
I0425 13:27:31.399111 136808779884352 checkpoint_manager.py:1512] [process=3] Saving checkpoint at step 15
I0425 13:27:31.401613 136808779884352 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_16_zarr3_true/checkpoints/15.
I0425 13:27:31.692256 136808779884352 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0425 13:27:31.692348 136808779884352 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 13:27:31.718254 136808779884352 base_pytree_checkpoint_handler.py:154] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.027014s
I0425 13:27:31.718394 136808779884352 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/blocking_gbytes_per_sec: 50.512 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.03053879737854004 s) (per-host)
I0425 13:27:31.718452 136808779884352 base_pytree_checkpoint_handler.py:768] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.030597s (batch_requests_ready=0.001904s, total_serialization_initiated=0.028629s, others=0.000065s)
I0425 13:27:31.718537 136808779884352 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.035645s (all_items=0.000013s, per_item={'items': '0.00001335'}, temp_paths=0.035631)
I0425 13:27:31.720244 136808779884352 event_tracking.py:125] [process=3] [async] Finished blocking save in 0.32 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_16_zarr3_true/checkpoints/15.
I0425 13:27:31.720470 136682703681280 async_checkpointer.py:76] [process=3][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 13:47:31.720436
I0425 13:27:31.732266 136808779884352 checkpoint_manager.py:1560] [process=3][thread=MainThread][step=15] Starting CheckpointManager Save Finalize thread=save_finalize
I0425 13:27:31.732548 136680539412224 async_checkpointer.py:280] [process=3][thread=save_finalize] Waiting for background save thread=async_save.
I0425 13:27:31.733974 136808779884352 standard_logger.py:34] {'step': 15, '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_16_zarr3_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777123602.189111, 'wait_for_prev_duration_secs': 49.20817494392395, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777123651.3991516, 'checkpointer_blocking_duration_secs': 0.3214585781097412, 'get_old_steps_start_time': 1777123651.7206283, 'get_old_steps_duration_secs': 2.574920654296875e-05, 'checkpoint_manager_blocking_start_time': 1777123602.1865706, 'checkpoint_manager_blocking_duration_secs': 49.54736924171448}
I0425 13:27:31.734087 136808779884352 checkpointing.py:409] Started an asynchronous checkpoint save for step 15
I0425 13:27:31.734874 136808779884352 metric_logger.py:196] completed step: 14, seconds: 0.147, TFLOP/s/device: 92.523, Tokens/s/device: 13946.109, total_weights: 65536, loss: 5.864, lm_loss: 5.864, perplexity: 352.193
I0425 13:27:31.740691 136808779884352 metric_logger.py:196] completed step: 15, seconds: 0.147, TFLOP/s/device: 92.341, Tokens/s/device: 13918.622, total_weights: 65536, loss: 5.719, lm_loss: 5.719, perplexity: 304.661
I0425 13:27:37.126433 136683186009856 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_16_zarr3_true/checkpoints/15/items/array_metadatas/process_3
I0425 13:27:53.241105 136808779884352 metric_logger.py:196] completed step: 16, seconds: 49.843, TFLOP/s/device: 0.273, Tokens/s/device: 41.089, total_weights: 65536, loss: 5.605, lm_loss: 5.605, perplexity: 271.872
I0425 13:27:53.388267 136808779884352 metric_logger.py:196] completed step: 17, seconds: 21.354, TFLOP/s/device: 0.636, Tokens/s/device: 95.907, total_weights: 65536, loss: 5.517, lm_loss: 5.517, perplexity: 248.975
I0425 13:27:53.535895 136808779884352 metric_logger.py:196] completed step: 18, seconds: 0.152, TFLOP/s/device: 89.148, Tokens/s/device: 13437.350, total_weights: 65536, loss: 5.448, lm_loss: 5.448, perplexity: 232.333
I0425 13:27:53.682488 136808779884352 checkpointing.py:794] Waiting for step 19 to finish before checkpoint...
I0425 13:27:53.683185 136808779884352 checkpointing.py:798] Waited 0.0007157325744628906 seconds for step 19 to finish before starting checkpointing.
I0425 13:27:53.686678 136808779884352 checkpoint_manager.py:2020] [process=3][thread=MainThread][step=15][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0425 13:28:13.305264 136682703681280 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/gbytes_per_sec: 37.955 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.617368936538696 s) (per-host)
I0425 13:28:13.305389 136682703681280 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.584811s.
I0425 13:28:23.142169 136682703681280 async_checkpointer.py:160] [process=3][thread=async_save] Background save thread done. Time taken: 51.421577s.
I0425 13:28:23.142479 136680539412224 async_checkpointer.py:288] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save.
I0425 13:28:23.142595 136680539412224 async_checkpointer.py:298] [process=3][thread=save_finalize] No errors found in background save thread=async_save.
I0425 13:28:23.142645 136680539412224 checkpoint_manager.py:2137] [process=3][thread=save_finalize][step=15] CheckpointManager Save Finalize is syncing with other hosts...
I0425 13:28:23.146625 136680539412224 checkpoint_manager.py:2146] [process=3][thread=save_finalize][step=15] CheckpointManager Save Finalize is done on all hosts.
I0425 13:28:23.146797 136808779884352 checkpoint_manager.py:2032] [process=3][thread=MainThread][step=15][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=15.
W0425 13:28:23.146935 136808779884352 checkpoint_manager.py:1452] Waiting for previous save to complete took 29.460255 seconds. If this number is high, consider checkpointing less frequently.
I0425 13:28:23.148339 136808779884352 checkpoint_manager.py:1512] [process=3] Saving checkpoint at step 19
I0425 13:28:23.150467 136808779884352 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_16_zarr3_true/checkpoints/19.
I0425 13:28:23.734454 136808779884352 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0425 13:28:23.734553 136808779884352 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 13:28:23.759645 136808779884352 base_pytree_checkpoint_handler.py:154] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.026129s
I0425 13:28:23.759770 136808779884352 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/blocking_gbytes_per_sec: 51.851 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.029750347137451172 s) (per-host)
I0425 13:28:23.759816 136808779884352 base_pytree_checkpoint_handler.py:768] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.029807s (batch_requests_ready=0.001812s, total_serialization_initiated=0.027935s, others=0.000061s)
I0425 13:28:23.759886 136808779884352 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.033828s (all_items=0.000010s, per_item={'items': '0.00000978'}, temp_paths=0.033818)
I0425 13:28:23.760644 136808779884352 event_tracking.py:125] [process=3] [async] Finished blocking save in 0.61 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_16_zarr3_true/checkpoints/19.
I0425 13:28:23.761011 136680539412224 async_checkpointer.py:76] [process=3][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 13:48:23.760972
I0425 13:28:23.765079 136808779884352 checkpoint_manager.py:1560] [process=3][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize
I0425 13:28:23.765322 136682120660736 async_checkpointer.py:280] [process=3][thread=save_finalize] Waiting for background save thread=async_save.
I0425 13:28:23.765447 136808779884352 standard_logger.py:34] {'step': 19, '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_16_zarr3_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777123673.6866457, 'wait_for_prev_duration_secs': 29.46025538444519, 'time_between_consecutive_saves_sec': 22.289621591567993, 'checkpointer_blocking_start_time': 1777123703.1483784, 'checkpointer_blocking_duration_secs': 0.6127798557281494, 'get_old_steps_start_time': 1777123703.7611773, 'get_old_steps_duration_secs': 2.6464462280273438e-05, 'checkpoint_manager_blocking_start_time': 1777123673.6834176, 'checkpoint_manager_blocking_duration_secs': 30.08199691772461}
I0425 13:28:23.765575 136808779884352 checkpointing.py:409] Started an asynchronous checkpoint save for step 19
I0425 13:28:23.765619 136808779884352 checkpoint_manager.py:2020] [process=3][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0425 13:28:29.228641 136681039615744 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_16_zarr3_true/checkpoints/19/items/array_metadatas/process_3
I0425 13:29:04.720541 136680539412224 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/gbytes_per_sec: 38.536 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 40.99047780036926 s) (per-host)
I0425 13:29:04.720663 136680539412224 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 40.959535s.
I0425 13:29:12.262269 136680539412224 async_checkpointer.py:160] [process=3][thread=async_save] Background save thread done. Time taken: 48.501126s.
I0425 13:29:12.262624 136682120660736 async_checkpointer.py:288] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save.
I0425 13:29:12.262748 136682120660736 async_checkpointer.py:298] [process=3][thread=save_finalize] No errors found in background save thread=async_save.
I0425 13:29:12.262791 136682120660736 checkpoint_manager.py:2137] [process=3][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts...
I0425 13:29:12.264158 136682120660736 checkpoint_manager.py:2146] [process=3][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts.
I0425 13:29:12.264328 136808779884352 checkpoint_manager.py:2032] [process=3][thread=MainThread][step=19][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=19.
I0425 13:29:12.264476 136808779884352 checkpoint_manager.py:2009] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0425 13:29:12.265437 136808779884352 metric_logger.py:196] completed step: 19, seconds: 0.147, TFLOP/s/device: 92.251, Tokens/s/device: 13905.108, total_weights: 65536, loss: 5.391, lm_loss: 5.391, perplexity: 219.349
Per train step:
 Total TFLOPs: 13.59 
 split as 93.93% learnable weight flops and 6.07% attention flops
XPK End: Sat Apr 25 13:29:25 UTC 2026
EXIT_CODE=0