MaxView

XPK Start: Wed Apr 22 15:31:53 UTC 2026
PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used.
2026-04-22 15:32:18.294317: E external/local_xla/xla/stream_executor/cuda/cuda_platform.cc:51] failed call to cuInit: INTERNAL: CUDA error: Failed call to cuInit: UNKNOWN ERROR (303)
I0422 15:32:18.473479 133582102902592 max_utils.py:273] Attempting to initialize the jax distributed system...
I0422 15:32:27.515497 133582102902592 distributed.py:149] Starting JAX distributed service on [::]:8482
I0422 15:32:27.517882 133582102902592 distributed.py:172] Connecting to JAX distributed service on mt-16-zarr3-true-rs-uwz2y-slice-job-0-0.mt-16-zarr3-true-rs-uwz2y:8482
I0422 15:32:28.941977 133582102902592 max_utils.py:284] Jax distributed system initialized!
I0422 15:32:35.114280 133582102902592 max_utils.py:800] System Information: Jax Version: 0.9.2
I0422 15:32:35.114382 133582102902592 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0422 15:32:35.114422 133582102902592 max_utils.py:802] System Information: Jax Backend: PJRT C API
TFRT TPU v6 lite
Built on Mar 4 2026 11:32:08 (1772652728) cl/878335365
I0422 15:32:35.114456 133582102902592 train_utils.py:378] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0422 15:32:35.813321 133582102902592 maxtext_utils.py:1718] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0422 15:32:35.926999 133582102902592 checkpointing.py:688] Setting up checkpoint logger...
I0422 15:32:35.927123 133582102902592 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True
I0422 15:32:35.927170 133582102902592 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0422 15:32:35.927361 133582102902592 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 0x797d4a24b800>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0422 15:32:37.229532 133582102902592 checkpointing.py:266] Enabling policy for fixed interval checkpointing.
I0422 15:32:37.229770 133582102902592 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 0x7968dc258aa0>}, handler_registry=None
I0422 15:32:37.230008 133582102902592 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7968dc258aa0>` for item "items" and save args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>` to `_handler_registry`.
I0422 15:32:37.230055 133582102902592 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7968dc259340>` for item "metrics" and save args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>` to `_handler_registry`.
I0422 15:32:37.230090 133582102902592 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 0x7968dc258aa0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7968dc258aa0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7968dc259340>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7968dc259340>}).
I0422 15:32:37.230410 133582102902592 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0422 15:32:37.230479 133582102902592 async_checkpointer.py:192] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7967f87a5da0> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0422 15:32:39.003651 133459733378816 checkpoint.py:228] Read Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776871694432736727, 'commit_timestamp_nsecs': 1776871736673358871, 'custom_metadata': {}} from gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/nnx_xpk_feat_nnx_post_train_fixes_20260422_123906_16_zarr3_true/checkpoints/0/_CHECKPOINT_METADATA
I0422 15:32:39.258937 133459733378816 checkpoint_manager.py:1871] Missing metrics for step 0
I0422 15:32:39.286387 133582102902592 checkpoint_manager.py:1812] Found 3 checkpoint steps in gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/nnx_xpk_feat_nnx_post_train_fixes_20260422_123906_16_zarr3_true/checkpoints
I0422 15:32:39.838796 133582102902592 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/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/nnx_xpk_feat_nnx_post_train_fixes_20260422_123906_16_zarr3_true/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7967f83be840>
I0422 15:32:39.838971 133582102902592 checkpointing.py:302] Checkpoint manager created!
I0422 15:32:40.810774 133582102902592 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint
I0422 15:32:40.810893 133582102902592 checkpointing.py:582] restoring from this run's directory step 9
I0422 15:32:41.058746 133582102902592 event_tracking.py:70] [process=6] [sync] Started load checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/nnx_xpk_feat_nnx_post_train_fixes_20260422_123906_16_zarr3_true/checkpoints/9.
I0422 15:32:41.309494 133582102902592 checkpointer.py:307] Restoring checkpoint from gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/nnx_xpk_feat_nnx_post_train_fixes_20260422_123906_16_zarr3_true/checkpoints/9.
I0422 15:32:41.309925 133582102902592 event_tracking.py:125] [process=6] [sync] Finished blocking load in 0.25 seconds. Continuing load @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/nnx_xpk_feat_nnx_post_train_fixes_20260422_123906_16_zarr3_true/checkpoints/9.
I0422 15:32:42.774362    1464 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0422 15:32:50.100054 133582102902592 jax_array_handlers.py:843] [process=6] /jax/orbax/read/worker/io/requested throughput: 215.527 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 7.332147121429443 s) (per-host)
I0422 15:32:50.108846 133582102902592 base_pytree_checkpoint_handler.py:130] [process=6] /jax/checkpoint/read/gbytes_per_sec: 203.678 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 7.770114898681641 s) (per-host)
I0422 15:32:52.171834 133582102902592 event_tracking.py:138] [process=6] [sync] Finished load in 11.11 seconds @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/nnx_xpk_feat_nnx_post_train_fixes_20260422_123906_16_zarr3_true/checkpoints/9
I0422 15:32:52.171987 133582102902592 standard_logger.py:34] {'step': 9, 'event_type': 'restore', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/nnx_xpk_feat_nnx_post_train_fixes_20260422_123906_16_zarr3_true/checkpoints', 'checkpointer_start_time': 1776871961.0586503, 'checkpointer_duration_secs': 11.113304853439331, 'checkpoint_manager_start_time': 1776871960.8115072, 'checkpoint_manager_duration_secs': 11.360450029373169}
fsdp: 32
I0422 15:32:52.247432 133582102902592 maxtext_utils.py:1836]  decoder/decoder_norm/scale/value
    Shape:     float32[2048]
    Physical:  (None,)
I0422 15:32:52.247543 133582102902592 maxtext_utils.py:1836]  decoder/layers/mlp/wi_0/kernel/value
    Shape:     float32[2048,16,7168]
    Physical:  ('fsdp', None, None)
I0422 15:32:52.247593 133582102902592 maxtext_utils.py:1836]  decoder/layers/mlp/wi_1/kernel/value
    Shape:     float32[2048,16,7168]
    Physical:  ('fsdp', None, None)
I0422 15:32:52.247635 133582102902592 maxtext_utils.py:1836]  decoder/layers/mlp/wo/kernel/value
    Shape:     float32[7168,16,2048]
    Physical:  (None, None, 'fsdp')
I0422 15:32:52.247672 133582102902592 maxtext_utils.py:1836]  decoder/layers/post_self_attention_layer_norm/scale/value
    Shape:     float32[2048,16]
    Physical:  (None, None)
I0422 15:32:52.247706 133582102902592 maxtext_utils.py:1836]  decoder/layers/pre_self_attention_layer_norm/scale/value
    Shape:     float32[2048,16]
    Physical:  (None, None)
I0422 15:32:52.247742 133582102902592 maxtext_utils.py:1836]  decoder/layers/self_attention/key/kernel/value
    Shape:     float32[2048,16,16,128]
    Physical:  ('fsdp', None, None, None)
I0422 15:32:52.247776 133582102902592 maxtext_utils.py:1836]  decoder/layers/self_attention/out/kernel/value
    Shape:     float32[16,16,128,2048]
    Physical:  (None, None, None, 'fsdp')
I0422 15:32:52.247809 133582102902592 maxtext_utils.py:1836]  decoder/layers/self_attention/query/kernel/value
    Shape:     float32[2048,16,16,128]
    Physical:  ('fsdp', None, None, None)
I0422 15:32:52.247841 133582102902592 maxtext_utils.py:1836]  decoder/layers/self_attention/value/kernel/value
    Shape:     float32[2048,16,16,128]
    Physical:  ('fsdp', None, None, None)
I0422 15:32:52.247873 133582102902592 maxtext_utils.py:1836]  decoder/logits_dense/kernel/value
    Shape:     float32[2048,32000]
    Physical:  ('fsdp', None)

I0422 15:32:52.247905 133582102902592 maxtext_utils.py:1836]  token_embedder/embedding/value
    Shape:     float32[32000,2048]
    Physical:  (None, 'fsdp')
I0422 15:32:52.643769 133582102902592 nnx_decoders.py:465] nnx_decoders/carry Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0422 15:32:52.643859 133582102902592 nnx_decoders.py:465] nnx_decoders/carry Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0422 15:32:52.649297 133582102902592 nnx_decoders.py:465] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0422 15:32:52.649353 133582102902592 nnx_decoders.py:465] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0422 15:32:52.665786 133582102902592 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0422 15:32:52.665846 133582102902592 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0422 15:32:52.681483 133582102902592 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0422 15:32:52.681548 133582102902592 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0422 15:32:52.706348 133582102902592 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0422 15:32:52.706418 133582102902592 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0422 15:32:52.722343 133582102902592 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0422 15:32:52.722407 133582102902592 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0422 15:32:52.738229 133582102902592 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0422 15:32:52.738288 133582102902592 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0422 15:32:52.768064 133582102902592 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0422 15:32:52.768146 133582102902592 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0422 15:32:52.787959 133582102902592 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0422 15:32:52.788023 133582102902592 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0422 15:33:04.325604 133582102902592 max_utils.py:791] Total memory size: 1.5 GB, Output size: 0.4 GB, Temp size: 1.1 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB.
I0422 15:33:04.328004 133582102902592 metric_logger.py:301] number parameters: 1.104 billion
I0422 15:33:15.754379 133582102902592 checkpointing.py:794] Waiting for step 10 to finish before checkpoint...
I0422 15:33:15.907129 133582102902592 checkpointing.py:798] Waited 0.15271663665771484 seconds for step 10 to finish before starting checkpointing.
I0422 15:33:15.909697 133582102902592 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0422 15:33:15.911635 133582102902592 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 10
I0422 15:33:15.913168 133582102902592 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/nnx_xpk_feat_nnx_post_train_fixes_20260422_123906_16_zarr3_true/checkpoints/10.
I0422 15:33:16.238084 133582102902592 signaling_client.py:364] Using JaxDistributedSignalingClient
I0422 15:33:16.239142 133582102902592 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array.
I0422 15:33:16.239201 133582102902592 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0422 15:33:16.511676 133582102902592 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.274367s
I0422 15:33:16.511852 133582102902592 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.486 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28116798400878906 s) (per-host)
I0422 15:33:16.511907 133582102902592 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.281233s (batch_requests_ready=0.002508s, total_serialization_initiated=0.278651s, others=0.000074s)
I0422 15:33:16.512007 133582102902592 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.285286s (all_items=0.000017s, per_item={'items': '0.00001717'}, temp_paths=0.285269)
I0422 15:33:16.512629 133582102902592 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.60 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/nnx_xpk_feat_nnx_post_train_fixes_20260422_123906_16_zarr3_true/checkpoints/10.
I0422 15:33:16.512925 133455892895488 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-22 15:53:16.512884
I0422 15:33:16.529427 133582102902592 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize
I0422 15:33:16.529702 133456411473664 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0422 15:33:16.529857 133582102902592 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/nnx_xpk_feat_nnx_post_train_fixes_20260422_123906_16_zarr3_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776871995.909677, 'wait_for_prev_duration_secs': 6.175041198730469e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776871995.9116728, 'checkpointer_blocking_duration_secs': 0.601355791091919, 'get_old_steps_start_time': 1776871996.5130517, 'get_old_steps_duration_secs': 2.8133392333984375e-05, 'checkpoint_manager_blocking_start_time': 1776871995.9074926, 'checkpoint_manager_blocking_duration_secs': 0.6223282814025879}
I0422 15:33:16.529967 133582102902592 checkpointing.py:409] Started an asynchronous checkpoint save for step 10
I0422 15:33:16.530033 133582102902592 max_utils.py:750] 
Memstats: After params initialized:
I0422 15:33:16.530083 133582102902592 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0))
I0422 15:33:16.530135 133582102902592 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0))
I0422 15:33:16.530164 133582102902592 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0))
I0422 15:33:16.530188 133582102902592 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0))
I0422 15:33:16.856739 133582102902592 metric_logger.py:196] completed step: 10, seconds: 11.425, TFLOP/s/device: 1.189, Tokens/s/device: 179.251, total_weights: 65536, loss: 6.827, lm_loss: 6.827, perplexity: 922.537
I0422 15:33:17.033238 133582102902592 metric_logger.py:196] completed step: 11, seconds: 1.101, TFLOP/s/device: 12.346, Tokens/s/device: 1860.896, total_weights: 65536, loss: 6.522, lm_loss: 6.522, perplexity: 679.821
I0422 15:33:17.180656 133582102902592 metric_logger.py:196] completed step: 12, seconds: 0.020, TFLOP/s/device: 693.115, Tokens/s/device: 104473.805, total_weights: 65536, loss: 6.260, lm_loss: 6.260, perplexity: 523.013
I0422 15:33:17.328270 133582102902592 metric_logger.py:196] completed step: 13, seconds: 0.165, TFLOP/s/device: 82.259, Tokens/s/device: 12399.046, total_weights: 65536, loss: 6.039, lm_loss: 6.039, perplexity: 419.520
I0422 15:33:17.334653 133582102902592 checkpointing.py:794] Waiting for step 15 to finish before checkpoint...
I0422 15:33:17.623028 133582102902592 checkpointing.py:798] Waited 0.2883462905883789 seconds for step 15 to finish before starting checkpointing.
I0422 15:33:17.625822 133582102902592 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0422 15:33:21.586271 133456394688256 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/nnx_xpk_feat_nnx_post_train_fixes_20260422_123906_16_zarr3_true/checkpoints/10/items/array_metadatas/process_6
I0422 15:33:58.644348 133455892895488 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 37.243 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.41362643241882 s) (per-host)
I0422 15:33:58.644474 133455892895488 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.130937s.
I0422 15:34:07.169807 133455892895488 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 50.656253s.
I0422 15:34:07.170196 133456411473664 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0422 15:34:07.170319 133456411473664 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0422 15:34:07.170370 133456411473664 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts...
I0422 15:34:07.171849 133456411473664 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts.
I0422 15:34:07.171986 133582102902592 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=10][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=10.
W0422 15:34:07.172056 133582102902592 checkpoint_manager.py:1452] Waiting for previous save to complete took 49.546243 seconds. If this number is high, consider checkpointing less frequently.
I0422 15:34:07.174299 133582102902592 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 15
I0422 15:34:07.176878 133582102902592 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/nnx_xpk_feat_nnx_post_train_fixes_20260422_123906_16_zarr3_true/checkpoints/15.
I0422 15:34:07.758854 133582102902592 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array.
I0422 15:34:07.758949 133582102902592 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0422 15:34:07.784935 133582102902592 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.027636s
I0422 15:34:07.785120 133582102902592 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 44.752 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.0344691276550293 s) (per-host)
I0422 15:34:07.785173 133582102902592 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.034546s (batch_requests_ready=0.002572s, total_serialization_initiated=0.031889s, others=0.000085s)
I0422 15:34:07.785278 133582102902592 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.039638s (all_items=0.000014s, per_item={'items': '0.00001359'}, temp_paths=0.039624)
I0422 15:34:07.786007 133582102902592 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.61 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/nnx_xpk_feat_nnx_post_train_fixes_20260422_123906_16_zarr3_true/checkpoints/15.
I0422 15:34:07.786315 133454784562944 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-22 15:54:07.786279
I0422 15:34:07.812874 133582102902592 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=15] Starting CheckpointManager Save Finalize thread=save_finalize
I0422 15:34:07.813186 133456411473664 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0422 15:34:07.813341 133582102902592 standard_logger.py:34] {'step': 15, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/nnx_xpk_feat_nnx_post_train_fixes_20260422_123906_16_zarr3_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776871997.625791, 'wait_for_prev_duration_secs': 49.54624271392822, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776872047.1743462, 'checkpointer_blocking_duration_secs': 0.6121153831481934, 'get_old_steps_start_time': 1776872047.7864852, 'get_old_steps_duration_secs': 3.528594970703125e-05, 'checkpoint_manager_blocking_start_time': 1776871997.6234097, 'checkpoint_manager_blocking_duration_secs': 50.18989610671997}
I0422 15:34:07.813455 133582102902592 checkpointing.py:409] Started an asynchronous checkpoint save for step 15
I0422 15:34:07.814465 133582102902592 metric_logger.py:196] completed step: 14, seconds: 0.147, TFLOP/s/device: 92.583, Tokens/s/device: 13955.136, total_weights: 65536, loss: 5.858, lm_loss: 5.858, perplexity: 350.067
I0422 15:34:07.822307 133582102902592 metric_logger.py:196] completed step: 15, seconds: 0.148, TFLOP/s/device: 91.847, Tokens/s/device: 13844.199, total_weights: 65536, loss: 5.713, lm_loss: 5.713, perplexity: 302.780
I0422 15:34:13.016478 133456394688256 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/nnx_xpk_feat_nnx_post_train_fixes_20260422_123906_16_zarr3_true/checkpoints/15/items/array_metadatas/process_6
I0422 15:34:29.604342 133582102902592 metric_logger.py:196] completed step: 16, seconds: 50.486, TFLOP/s/device: 0.269, Tokens/s/device: 40.566, total_weights: 65536, loss: 5.599, lm_loss: 5.599, perplexity: 270.201
I0422 15:34:29.751711 133582102902592 metric_logger.py:196] completed step: 17, seconds: 21.637, TFLOP/s/device: 0.628, Tokens/s/device: 94.654, total_weights: 65536, loss: 5.511, lm_loss: 5.511, perplexity: 247.443
I0422 15:34:29.899454 133582102902592 metric_logger.py:196] completed step: 18, seconds: 0.153, TFLOP/s/device: 88.671, Tokens/s/device: 13365.529, total_weights: 65536, loss: 5.442, lm_loss: 5.442, perplexity: 230.909
I0422 15:34:30.047591 133582102902592 checkpointing.py:794] Waiting for step 19 to finish before checkpoint...
I0422 15:34:30.048290 133582102902592 checkpointing.py:798] Waited 0.0007143020629882812 seconds for step 19 to finish before starting checkpointing.
I0422 15:34:30.050844 133582102902592 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=15][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0422 15:34:50.132286 133454784562944 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 37.271 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.38160991668701 s) (per-host)
I0422 15:34:50.132413 133454784562944 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.345981s.
I0422 15:34:58.812274 133454784562944 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 51.025826s.
I0422 15:34:58.812549 133456411473664 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0422 15:34:58.812664 133456411473664 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0422 15:34:58.812712 133456411473664 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=15] CheckpointManager Save Finalize is syncing with other hosts...
I0422 15:34:58.814321 133456411473664 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=15] CheckpointManager Save Finalize is done on all hosts.
I0422 15:34:58.814492 133582102902592 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.
W0422 15:34:58.814613 133582102902592 checkpoint_manager.py:1452] Waiting for previous save to complete took 28.763776 seconds. If this number is high, consider checkpointing less frequently.
I0422 15:34:58.816462 133582102902592 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 19
I0422 15:34:58.818542 133582102902592 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/nnx_xpk_feat_nnx_post_train_fixes_20260422_123906_16_zarr3_true/checkpoints/19.
I0422 15:34:59.130779 133582102902592 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array.
I0422 15:34:59.130874 133582102902592 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0422 15:34:59.156996 133582102902592 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.027723s
I0422 15:34:59.157179 133582102902592 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 44.446 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.03470635414123535 s) (per-host)
I0422 15:34:59.157233 133582102902592 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.034770s (batch_requests_ready=0.002695s, total_serialization_initiated=0.032007s, others=0.000069s)
I0422 15:34:59.157335 133582102902592 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.038855s (all_items=0.000011s, per_item={'items': '0.00001121'}, temp_paths=0.038843)
I0422 15:34:59.158048 133582102902592 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.34 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/nnx_xpk_feat_nnx_post_train_fixes_20260422_123906_16_zarr3_true/checkpoints/19.
I0422 15:34:59.158396 133456411473664 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-22 15:54:59.158357
I0422 15:34:59.163041 133582102902592 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize
I0422 15:34:59.163306 133459683022592 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0422 15:34:59.163440 133582102902592 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/nnx_xpk_feat_nnx_post_train_fixes_20260422_123906_16_zarr3_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776872070.0508137, 'wait_for_prev_duration_secs': 28.76377582550049, 'time_between_consecutive_saves_sec': 22.87892460823059, 'checkpointer_blocking_start_time': 1776872098.816503, 'checkpointer_blocking_duration_secs': 0.3420388698577881, 'get_old_steps_start_time': 1776872099.1585608, 'get_old_steps_duration_secs': 2.6941299438476562e-05, 'checkpoint_manager_blocking_start_time': 1776872070.0485313, 'checkpoint_manager_blocking_duration_secs': 29.114876747131348}
I0422 15:34:59.163552 133582102902592 checkpointing.py:409] Started an asynchronous checkpoint save for step 19
I0422 15:34:59.163594 133582102902592 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0422 15:35:05.228941 133455343068928 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/nnx_xpk_feat_nnx_post_train_fixes_20260422_123906_16_zarr3_true/checkpoints/19/items/array_metadatas/process_6
I0422 15:35:41.852869 133456411473664 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 36.967 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.730363607406616 s) (per-host)
I0422 15:35:41.852977 133456411473664 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.694467s.
I0422 15:35:50.428130 133456411473664 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 51.269584s.
I0422 15:35:50.428375 133459683022592 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0422 15:35:50.428431 133459683022592 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0422 15:35:50.428478 133459683022592 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts...
I0422 15:35:50.430207 133459683022592 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts.
I0422 15:35:50.430390 133582102902592 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=19][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=19.
I0422 15:35:50.430559 133582102902592 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0422 15:35:50.431595 133582102902592 metric_logger.py:196] completed step: 19, seconds: 0.148, TFLOP/s/device: 92.066, Tokens/s/device: 13877.219, total_weights: 65536, loss: 5.385, lm_loss: 5.385, perplexity: 218.045
Per train step:
 Total TFLOPs: 13.59 
 split as 93.93% learnable weight flops and 6.07% attention flops
XPK End: Wed Apr 22 15:35:58 UTC 2026
EXIT_CODE=0