MaxView

XPK Start: Sun Apr 19 22:14:30 UTC 2026
PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used.
2026-04-19 22:14:54.813504: 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)
I0419 22:14:54.992481 136025315080000 max_utils.py:273] Attempting to initialize the jax distributed system...
I0419 22:15:04.031090 136025315080000 distributed.py:149] Starting JAX distributed service on [::]:8482
I0419 22:15:04.033461 136025315080000 distributed.py:172] Connecting to JAX distributed service on mt-07-eval-c0uh8-slice-job-0-0.mt-07-eval-c0uh8:8482
I0419 22:15:05.902734 136025315080000 max_utils.py:284] Jax distributed system initialized!
I0419 22:15:12.045748 136025315080000 max_utils.py:800] System Information: Jax Version: 0.9.2
I0419 22:15:12.045850 136025315080000 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0419 22:15:12.045889 136025315080000 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
I0419 22:15:12.045922 136025315080000 train_utils.py:378] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0419 22:15:13.096575 136025315080000 maxtext_utils.py:1718] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0419 22:15:13.097170 136025315080000 maxtext_utils.py:1718] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0419 22:15:13.097373 136025315080000 checkpointing.py:688] Setting up checkpoint logger...
I0419 22:15:13.097423 136025315080000 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True
I0419 22:15:13.097467 136025315080000 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0419 22:15:13.097799 136025315080000 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 0x7bb624f3c590>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0419 22:15:17.454259 136025315080000 checkpointing.py:266] Enabling policy for fixed interval checkpointing.
I0419 22:15:17.454526 136025315080000 checkpoint_manager.py:708] [process=4][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7bb518fa3a70>}, handler_registry=None
I0419 22:15:17.454911 136025315080000 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7bb518fa3a70>` 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`.
I0419 22:15:17.454976 136025315080000 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7bb518fc5850>` 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`.
I0419 22:15:17.455030 136025315080000 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 0x7bb518fa3a70>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7bb518fa3a70>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7bb518fc5850>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7bb518fc5850>}).
I0419 22:15:17.455385 136025315080000 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0419 22:15:17.455481 136025315080000 async_checkpointer.py:192] [process=4][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7ba1c0593740> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0419 22:15:19.200947 136025315080000 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525/linen_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525_07_eval/checkpoints
I0419 22:15:19.203212 136025315080000 checkpoint_manager.py:929] [process=4][thread=MainThread] CheckpointManager created,  primary_host=0, CheckpointManagerOptions=CheckpointManagerOptions(save_interval_steps=1, max_to_keep=None, keep_time_interval=None, keep_period=None, should_keep_fn=None, best_fn=None, best_mode='max', keep_checkpoints_without_metrics=True, step_prefix=None, step_format_fixed_length=None, step_name_format=None, create=True, cleanup_tmp_directories=False, save_on_steps=frozenset(), single_host_load_and_broadcast=False, todelete_subdir=None, todelete_full_path=None, enable_background_delete=False, read_only=False, enable_async_checkpointing=True, async_options=None, multiprocessing_options=MultiprocessingOptions(primary_host=0, active_processes=None, barrier_sync_key_prefix=None), should_save_fn=None, file_options=FileOptions(path_permission_mode=None), save_root_metadata=True, temporary_path_class=None, save_decision_policy=FixedIntervalPolicy(interval=10), preservation_policy=LatestN(n=None), prevent_write_metrics=False, enable_should_save_is_saving_in_progress_check=True, enable_per_process_directory_creation=False, lightweight_initialize=False), root_directory=gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525/linen_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525_07_eval/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7bb518fc53d0>
I0419 22:15:19.203325 136025315080000 checkpointing.py:302] Checkpoint manager created!
I0419 22:15:20.132354 136025315080000 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0419 22:15:20.132455 136025315080000 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0419 22:15:20.512914 136025315080000 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0419 22:15:20.513004 136025315080000 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0419 22:15:20.529264 136025315080000 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0419 22:15:20.529320 136025315080000 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0419 22:15:20.552745 136025315080000 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0419 22:15:20.552819 136025315080000 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0419 22:15:20.569011 136025315080000 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0419 22:15:20.569076 136025315080000 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0419 22:15:20.585185 136025315080000 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0419 22:15:20.585256 136025315080000 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0419 22:15:20.609833 136025315080000 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0419 22:15:20.609897 136025315080000 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0419 22:15:20.631458 136025315080000 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0419 22:15:20.631519 136025315080000 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0419 22:15:20.846487 136025315080000 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint
I0419 22:15:20.846593 136025315080000 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0419 22:15:22.263571 136025315080000 maxtext_utils.py:1821]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0419 22:15:22.263695 136025315080000 maxtext_utils.py:1821]  params/params/decoder/layers/mlp/wi_0/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0419 22:15:22.263748 136025315080000 maxtext_utils.py:1821]  params/params/decoder/layers/mlp/wi_1/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0419 22:15:22.263806 136025315080000 maxtext_utils.py:1821]  params/params/decoder/layers/mlp/wo/kernel
    Shape:     float32[7168,16,2048]
    Logical:   P('mlp', 'layers', 'embed')
    Physical:  (None, None, 'fsdp')
I0419 22:15:22.263882 136025315080000 maxtext_utils.py:1821]  params/params/decoder/layers/post_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0419 22:15:22.263945 136025315080000 maxtext_utils.py:1821]  params/params/decoder/layers/pre_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0419 22:15:22.264021 136025315080000 maxtext_utils.py:1821]  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)
I0419 22:15:22.264078 136025315080000 maxtext_utils.py:1821]  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')
I0419 22:15:22.264119 136025315080000 maxtext_utils.py:1821]  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)
I0419 22:15:22.264155 136025315080000 maxtext_utils.py:1821]  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)
I0419 22:15:22.264203 136025315080000 maxtext_utils.py:1821]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)

I0419 22:15:22.264250 136025315080000 maxtext_utils.py:1821]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')
I0419 22:15:22.756108 136025315080000 train.py:157] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0419 22:15:22.756198 136025315080000 train.py:157] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0419 22:15:22.771449 136025315080000 train.py:164] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0419 22:15:22.771509 136025315080000 train.py:164] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0419 22:15:33.615466 136025315080000 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.
I0419 22:15:33.616202 136025315080000 metric_logger.py:301] number parameters: 1.104 billion
I0419 22:15:44.801060 136025315080000 checkpointing.py:794] Waiting for step 0 to finish before checkpoint...
I0419 22:15:44.954884 136025315080000 checkpointing.py:798] Waited 0.15381121635437012 seconds for step 0 to finish before starting checkpointing.
I0419 22:15:44.957278 136025315080000 checkpoint_manager.py:2009] [process=4][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0419 22:15:44.958908 136025315080000 checkpoint_manager.py:1512] [process=4] Saving checkpoint at step 0
I0419 22:15:44.960324 136025315080000 event_tracking.py:70] [process=4] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525/linen_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525_07_eval/checkpoints/0.
I0419 22:15:45.693359 136025315080000 signaling_client.py:364] Using JaxDistributedSignalingClient
I0419 22:15:45.694309 136025315080000 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0419 22:15:45.694383 136025315080000 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
I0419 22:15:45.965262 136025315080000 base_pytree_checkpoint_handler.py:154] [process=4][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.271992s
I0419 22:15:45.965459 136025315080000 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/blocking_gbytes_per_sec: 5.561 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2774035930633545 s) (per-host)
I0419 22:15:45.965585 136025315080000 base_pytree_checkpoint_handler.py:768] [process=4][thread=MainThread] Initiated Pytree async_save. Time taken: 0.277539s (batch_requests_ready=0.002190s, total_serialization_initiated=0.275205s, others=0.000144s)
I0419 22:15:45.965692 136025315080000 composite_checkpoint_handler.py:715] [process=4][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.281612s (all_items=0.000018s, per_item={'items': '0.00001788'}, temp_paths=0.281594)
I0419 22:15:45.966485 136025315080000 event_tracking.py:125] [process=4] [async] Finished blocking save in 1.01 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525/linen_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525_07_eval/checkpoints/0.
I0419 22:15:45.966853 135895718033152 async_checkpointer.py:76] [process=4][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-19 22:35:45.966817
I0419 22:15:45.980087 136025315080000 checkpoint_manager.py:1560] [process=4][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0419 22:15:45.980424 135892456806144 async_checkpointer.py:280] [process=4][thread=save_finalize] Waiting for background save thread=async_save.
I0419 22:15:45.980583 136025315080000 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525/linen_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525_07_eval/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776636944.95726, 'wait_for_prev_duration_secs': 6.127357482910156e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776636944.9589467, 'checkpointer_blocking_duration_secs': 1.0080616474151611, 'get_old_steps_start_time': 1776636945.967033, 'get_old_steps_duration_secs': 3.075599670410156e-05, 'checkpoint_manager_blocking_start_time': 1776636944.9553697, 'checkpoint_manager_blocking_duration_secs': 1.0251736640930176}
I0419 22:15:45.980688 136025315080000 checkpointing.py:409] Started an asynchronous checkpoint save for step 0
I0419 22:15:45.980737 136025315080000 max_utils.py:750] 
Memstats: After params initialized:
I0419 22:15:45.980785 136025315080000 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_16(process=4,(0,4,0,0))
I0419 22:15:45.980818 136025315080000 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_17(process=4,(1,4,0,0))
I0419 22:15:45.980851 136025315080000 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_20(process=4,(0,5,0,0))
I0419 22:15:45.980876 136025315080000 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_21(process=4,(1,5,0,0))
I0419 22:15:46.293849 136025315080000 metric_logger.py:196] completed step: 0, seconds: 11.185, TFLOP/s/device: 1.215, Tokens/s/device: 183.106, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0419 22:15:46.485038 136025315080000 metric_logger.py:196] completed step: 1, seconds: 1.491, TFLOP/s/device: 9.111, Tokens/s/device: 1373.340, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0419 22:15:47.337770 136025315080000 metric_logger.py:196] completed step: 2, seconds: 0.044, TFLOP/s/device: 307.972, Tokens/s/device: 46420.962, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28637.129
I0419 22:15:47.485215 136025315080000 metric_logger.py:196] completed step: 3, seconds: 0.853, TFLOP/s/device: 15.932, Tokens/s/device: 2401.433, total_weights: 65536, loss: 9.734, lm_loss: 9.734, perplexity: 16889.203
I0419 22:15:47.780484 136025315080000 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.876, Tokens/s/device: 13396.391, total_weights: 65536, loss: 9.277, lm_loss: 9.277, perplexity: 10694.614
I0419 22:15:47.786531 136025315080000 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.199, Tokens/s/device: 13897.277, total_weights: 65536, loss: 8.892, lm_loss: 8.892, perplexity: 7270.717
I0419 22:15:49.749369    2829 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0419 22:15:52.234467 135892465198848 array_metadata_store.py:203] [process=4][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525/linen_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525_07_eval/checkpoints/0/items/array_metadatas/process_4
I0419 22:16:13.308075 136025315080000 metric_logger.py:196] completed step: 6, seconds: 0.296, TFLOP/s/device: 45.887, Tokens/s/device: 6916.582, total_weights: 65536, loss: 8.592, lm_loss: 8.592, perplexity: 5390.759
I0419 22:16:13.455653 136025315080000 metric_logger.py:196] completed step: 7, seconds: 25.375, TFLOP/s/device: 0.535, Tokens/s/device: 80.710, total_weights: 65536, loss: 8.384, lm_loss: 8.384, perplexity: 4376.905
I0419 22:16:13.603051 136025315080000 metric_logger.py:196] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.296, Tokens/s/device: 13459.605, total_weights: 65536, loss: 8.255, lm_loss: 8.255, perplexity: 3846.406
I0419 22:16:13.749742 136025315080000 checkpointing.py:794] Waiting for step 9 to finish before checkpoint...
I0419 22:16:13.750303 136025315080000 checkpointing.py:798] Waited 0.0005829334259033203 seconds for step 9 to finish before starting checkpointing.
I0419 22:16:13.752709 136025315080000 checkpoint_manager.py:2020] [process=4][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0419 22:16:24.024197 135895718033152 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/gbytes_per_sec: 41.204 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 38.3361074924469 s) (per-host)
I0419 22:16:24.024316 135895718033152 async_checkpointer.py:90] [process=4][thread=async_save] 3 Handler Commit operations completed. Time taken: 38.057352s.
I0419 22:16:34.568915 135895718033152 async_checkpointer.py:160] [process=4][thread=async_save] Background save thread done. Time taken: 48.601933s.
I0419 22:16:34.569207 135892456806144 async_checkpointer.py:288] [process=4][thread=save_finalize] Done with waiting for background save thread=async_save.
I0419 22:16:34.569320 135892456806144 async_checkpointer.py:298] [process=4][thread=save_finalize] No errors found in background save thread=async_save.
I0419 22:16:34.569405 135892456806144 checkpoint_manager.py:2137] [process=4][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0419 22:16:34.570894 135892456806144 checkpoint_manager.py:2146] [process=4][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0419 22:16:34.571061 136025315080000 checkpoint_manager.py:2032] [process=4][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0419 22:16:34.571200 136025315080000 checkpoint_manager.py:1452] Waiting for previous save to complete took 20.818491 seconds. If this number is high, consider checkpointing less frequently.
I0419 22:16:34.573032 136025315080000 checkpoint_manager.py:1512] [process=4] Saving checkpoint at step 9
I0419 22:16:34.575098 136025315080000 event_tracking.py:70] [process=4] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525/linen_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525_07_eval/checkpoints/9.
I0419 22:16:35.715369 136025315080000 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0419 22:16:35.715463 136025315080000 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
I0419 22:16:35.751483 136025315080000 base_pytree_checkpoint_handler.py:154] [process=4][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.037351s
I0419 22:16:35.751653 136025315080000 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/blocking_gbytes_per_sec: 37.794 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.040815114974975586 s) (per-host)
I0419 22:16:35.751706 136025315080000 base_pytree_checkpoint_handler.py:768] [process=4][thread=MainThread] Initiated Pytree async_save. Time taken: 0.040878s (batch_requests_ready=0.001821s, total_serialization_initiated=0.038986s, others=0.000071s)
I0419 22:16:35.751795 136025315080000 composite_checkpoint_handler.py:715] [process=4][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.044803s (all_items=0.000015s, per_item={'items': '0.00001502'}, temp_paths=0.044788)
I0419 22:16:35.752492 136025315080000 event_tracking.py:125] [process=4] [async] Finished blocking save in 1.18 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525/linen_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525_07_eval/checkpoints/9.
I0419 22:16:35.752777 135892456806144 async_checkpointer.py:76] [process=4][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-19 22:36:35.752753
I0419 22:16:35.763093 136025315080000 checkpoint_manager.py:1560] [process=4][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0419 22:16:35.763350 135895181162240 async_checkpointer.py:280] [process=4][thread=save_finalize] Waiting for background save thread=async_save.
I0419 22:16:35.763480 136025315080000 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525/linen_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525_07_eval/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776636973.752678, 'wait_for_prev_duration_secs': 20.818490505218506, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776636994.5730708, 'checkpointer_blocking_duration_secs': 1.1798136234283447, 'get_old_steps_start_time': 1776636995.7529063, 'get_old_steps_duration_secs': 2.956390380859375e-05, 'checkpoint_manager_blocking_start_time': 1776636973.7505462, 'checkpoint_manager_blocking_duration_secs': 22.012897729873657}
I0419 22:16:35.763585 136025315080000 checkpointing.py:409] Started an asynchronous checkpoint save for step 9
I0419 22:16:35.763631 136025315080000 checkpoint_manager.py:2020] [process=4][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0419 22:16:46.620830 135892465198848 array_metadata_store.py:203] [process=4][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525/linen_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525_07_eval/checkpoints/9/items/array_metadatas/process_4
I0419 22:17:21.109883 135892456806144 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/gbytes_per_sec: 34.794 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 45.39899802207947 s) (per-host)
I0419 22:17:21.109993 135892456806144 async_checkpointer.py:90] [process=4][thread=async_save] 3 Handler Commit operations completed. Time taken: 45.357133s.
I0419 22:17:32.212434 135892456806144 async_checkpointer.py:160] [process=4][thread=async_save] Background save thread done. Time taken: 56.459558s.
I0419 22:17:32.212659 135895181162240 async_checkpointer.py:288] [process=4][thread=save_finalize] Done with waiting for background save thread=async_save.
I0419 22:17:32.212724 135895181162240 async_checkpointer.py:298] [process=4][thread=save_finalize] No errors found in background save thread=async_save.
I0419 22:17:32.212772 135895181162240 checkpoint_manager.py:2137] [process=4][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0419 22:17:32.214631 135895181162240 checkpoint_manager.py:2146] [process=4][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0419 22:17:32.214801 136025315080000 checkpoint_manager.py:2032] [process=4][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0419 22:17:32.214949 136025315080000 checkpoint_manager.py:2009] [process=4][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0419 22:17:32.215904 136025315080000 metric_logger.py:196] completed step: 9, seconds: 0.148, TFLOP/s/device: 92.114, Tokens/s/device: 13884.463, total_weights: 65536, loss: 8.179, lm_loss: 8.179, perplexity: 3564.635
Per train step:
 Total TFLOPs: 13.59 
 split as 93.93% learnable weight flops and 6.07% attention flops
XPK End: Sun Apr 19 22:17:40 UTC 2026
EXIT_CODE=0