MaxView

XPK Start: Wed Apr 22 09:37:13 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 09:37:37.162489: 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 09:37:37.700553 133298052175680 max_utils.py:273] Attempting to initialize the jax distributed system...
I0422 09:37:46.742280 133298052175680 distributed.py:149] Starting JAX distributed service on [::]:8482
I0422 09:37:46.744647 133298052175680 distributed.py:172] Connecting to JAX distributed service on mt-03-dropout-n8usr-slice-job-0-0.mt-03-dropout-n8usr:8482
I0422 09:37:47.629846 133298052175680 max_utils.py:284] Jax distributed system initialized!
I0422 09:37:53.594415 133298052175680 max_utils.py:800] System Information: Jax Version: 0.9.2
I0422 09:37:53.594517 133298052175680 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0422 09:37:53.594569 133298052175680 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 09:37:53.594607 133298052175680 train_utils.py:378] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0422 09:37:54.293854 133298052175680 maxtext_utils.py:1718] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0422 09:37:54.294453 133298052175680 maxtext_utils.py:1718] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0422 09:37:54.294636 133298052175680 checkpointing.py:688] Setting up checkpoint logger...
I0422 09:37:54.294685 133298052175680 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True
I0422 09:37:54.294728 133298052175680 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0422 09:37:54.295052 133298052175680 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 0x793b3eb1cbf0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0422 09:37:57.694800 133298052175680 checkpointing.py:266] Enabling policy for fixed interval checkpointing.
I0422 09:37:57.694987 133298052175680 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 0x7926f013e0c0>}, handler_registry=None
I0422 09:37:57.695233 133298052175680 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7926f013e0c0>` 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 09:37:57.695283 133298052175680 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7926d8389430>` 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 09:37:57.695320 133298052175680 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 0x7926f013e0c0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7926f013e0c0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7926d8389430>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7926d8389430>}).
I0422 09:37:57.695633 133298052175680 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0422 09:37:57.695704 133298052175680 async_checkpointer.py:192] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7925bc66bec0> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0422 09:37:58.828009 133298052175680 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106/linen_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106_03_dropout/checkpoints
I0422 09:37:58.831956 133298052175680 checkpoint_manager.py:929] [process=6][thread=MainThread] CheckpointManager created,  primary_host=0, CheckpointManagerOptions=CheckpointManagerOptions(save_interval_steps=1, max_to_keep=None, keep_time_interval=None, keep_period=None, should_keep_fn=None, best_fn=None, best_mode='max', keep_checkpoints_without_metrics=True, step_prefix=None, step_format_fixed_length=None, step_name_format=None, create=True, cleanup_tmp_directories=False, save_on_steps=frozenset(), single_host_load_and_broadcast=False, todelete_subdir=None, todelete_full_path=None, enable_background_delete=False, read_only=False, enable_async_checkpointing=True, async_options=None, multiprocessing_options=MultiprocessingOptions(primary_host=0, active_processes=None, barrier_sync_key_prefix=None), should_save_fn=None, file_options=FileOptions(path_permission_mode=None), save_root_metadata=True, temporary_path_class=None, save_decision_policy=FixedIntervalPolicy(interval=10), preservation_policy=LatestN(n=None), prevent_write_metrics=False, enable_should_save_is_saving_in_progress_check=True, enable_per_process_directory_creation=False, lightweight_initialize=False), root_directory=gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106/linen_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106_03_dropout/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7926d836b4d0>
I0422 09:37:58.832068 133298052175680 checkpointing.py:302] Checkpoint manager created!
I0422 09:37:59.184788 133298052175680 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,128,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0422 09:37:59.184892 133298052175680 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,128,2048]....................................... ('fsdp', None, None).
I0422 09:37:59.562569 133298052175680 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,128,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0422 09:37:59.562656 133298052175680 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,128,2048]....................................... ('fsdp', None, None).
I0422 09:37:59.578899 133298052175680 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,128,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0422 09:37:59.578956 133298052175680 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,128,2048]....................................... ('fsdp', None, None).
I0422 09:37:59.602533 133298052175680 attentions.py:1154] attentions/query Logical: bfloat16[32,128,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0422 09:37:59.602598 133298052175680 attentions.py:1154] attentions/query Physical: bfloat16[32,128,16,128]..................................... ('fsdp', None, None, None).
I0422 09:37:59.618965 133298052175680 attentions.py:1155] attentions/key Logical: bfloat16[32,128,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0422 09:37:59.619025 133298052175680 attentions.py:1155] attentions/key Physical: bfloat16[32,128,16,128]..................................... ('fsdp', None, None, None).
I0422 09:37:59.635338 133298052175680 attentions.py:1156] attentions/value Logical: bfloat16[32,128,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0422 09:37:59.635398 133298052175680 attentions.py:1156] attentions/value Physical: bfloat16[32,128,16,128]..................................... ('fsdp', None, None, None).
I0422 09:37:59.660920 133298052175680 attentions.py:1197] attentions/out Logical: bfloat16[32,128,16,128]..................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0422 09:37:59.660989 133298052175680 attentions.py:1197] attentions/out Physical: bfloat16[32,128,16,128]..................................... ('fsdp', None, None, None).
I0422 09:37:59.687166 133298052175680 linears.py:525] linears/x Logical: bfloat16[32,128,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0422 09:37:59.687231 133298052175680 linears.py:525] linears/x Physical: bfloat16[32,128,7168]....................................... ('fsdp', None, None).
I0422 09:37:59.912772 133298052175680 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint
I0422 09:37:59.912878 133298052175680 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0422 09:38:01.379305 133298052175680 maxtext_utils.py:1821]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0422 09:38:01.379436 133298052175680 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)
I0422 09:38:01.379490 133298052175680 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)
I0422 09:38:01.379549 133298052175680 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')
I0422 09:38:01.379601 133298052175680 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)
I0422 09:38:01.379639 133298052175680 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)
I0422 09:38:01.379693 133298052175680 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)
I0422 09:38:01.379746 133298052175680 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')
I0422 09:38:01.379786 133298052175680 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)
I0422 09:38:01.379823 133298052175680 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)
I0422 09:38:01.379870 133298052175680 maxtext_utils.py:1821]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)
I0422 09:38:01.379920 133298052175680 maxtext_utils.py:1821]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')

I0422 09:38:01.903204 133298052175680 train.py:157] train/xent Logical: float32[32,128]............................................. ('activation_embed_and_logits_batch', 'activation_length').
I0422 09:38:01.903299 133298052175680 train.py:157] train/xent Physical: float32[32,128]............................................. ('fsdp', None).
I0422 09:38:01.918810 133298052175680 train.py:164] train/z_loss Logical: float32[32,128]............................................. ('activation_embed_and_logits_batch', 'activation_length').
I0422 09:38:01.918873 133298052175680 train.py:164] train/z_loss Physical: float32[32,128]............................................. ('fsdp', None).
I0422 09:38:05.513376 133298052175680 max_utils.py:791] Total memory size: 0.8 GB, Output size: 0.4 GB, Temp size: 0.4 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB.
I0422 09:38:05.514204 133298052175680 metric_logger.py:301] number parameters: 1.104 billion
I0422 09:38:09.750918 133298052175680 checkpointing.py:794] Waiting for step 0 to finish before checkpoint...
I0422 09:38:09.823928 133298052175680 checkpointing.py:798] Waited 0.0729987621307373 seconds for step 0 to finish before starting checkpointing.
I0422 09:38:09.826368 133298052175680 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0422 09:38:09.828478 133298052175680 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 0
I0422 09:38:09.829931 133298052175680 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106/linen_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106_03_dropout/checkpoints/0.
I0422 09:38:10.114066 133298052175680 signaling_client.py:364] Using JaxDistributedSignalingClient
I0422 09:38:10.115049 133298052175680 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0422 09:38:10.115124 133298052175680 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 09:38:10.393486 133298052175680 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.279492s
I0422 09:38:10.393659 133298052175680 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.413 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2849607467651367 s) (per-host)
I0422 09:38:10.393712 133298052175680 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.285023s (batch_requests_ready=0.002315s, total_serialization_initiated=0.282637s, others=0.000071s)
I0422 09:38:10.393800 133298052175680 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.289091s (all_items=0.000017s, per_item={'items': '0.00001693'}, temp_paths=0.289074)
I0422 09:38:10.394559 133298052175680 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.57 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106/linen_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106_03_dropout/checkpoints/0.
I0422 09:38:10.394827 133168805005056 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-22 09:58:10.394803
I0422 09:38:10.400418 133298052175680 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0422 09:38:10.400712 133167219140352 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0422 09:38:10.400868 133298052175680 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106/linen_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106_03_dropout/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776850689.8263423, 'wait_for_prev_duration_secs': 9.012222290039062e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776850689.828535, 'checkpointer_blocking_duration_secs': 0.5664112567901611, 'get_old_steps_start_time': 1776850690.3949723, 'get_old_steps_duration_secs': 2.956390380859375e-05, 'checkpoint_manager_blocking_start_time': 1776850689.824448, 'checkpoint_manager_blocking_duration_secs': 0.5763826370239258}
I0422 09:38:10.400972 133298052175680 checkpointing.py:409] Started an asynchronous checkpoint save for step 0
I0422 09:38:10.401021 133298052175680 max_utils.py:750] 
Memstats: After params initialized:
I0422 09:38:10.401068 133298052175680 max_utils.py:756] 	Using (GB) 0.41 / 31.25 (1.312000%) on TPU_24(process=6,(0,6,0,0))
I0422 09:38:10.401115 133298052175680 max_utils.py:756] 	Using (GB) 0.41 / 31.25 (1.312000%) on TPU_25(process=6,(1,6,0,0))
I0422 09:38:10.401144 133298052175680 max_utils.py:756] 	Using (GB) 0.41 / 31.25 (1.312000%) on TPU_28(process=6,(0,7,0,0))
I0422 09:38:10.401169 133298052175680 max_utils.py:756] 	Using (GB) 0.41 / 31.25 (1.312000%) on TPU_29(process=6,(1,7,0,0))
I0422 09:38:10.719251 133298052175680 metric_logger.py:196] completed step: 0, seconds: 4.237, TFLOP/s/device: 0.189, Tokens/s/device: 30.213, total_weights: 4096, loss: 10.889, lm_loss: 10.889, perplexity: 53560.699
I0422 09:38:10.813164 133298052175680 metric_logger.py:196] completed step: 1, seconds: 0.967, TFLOP/s/device: 0.828, Tokens/s/device: 132.390, total_weights: 4096, loss: 10.902, lm_loss: 10.902, perplexity: 54298.523
I0422 09:38:11.202883 133298052175680 metric_logger.py:196] completed step: 2, seconds: 0.024, TFLOP/s/device: 33.748, Tokens/s/device: 5393.789, total_weights: 4096, loss: 9.956, lm_loss: 9.956, perplexity: 21082.051
I0422 09:38:11.273694 133298052175680 metric_logger.py:196] completed step: 3, seconds: 0.390, TFLOP/s/device: 2.052, Tokens/s/device: 327.928, total_weights: 4096, loss: 9.139, lm_loss: 9.139, perplexity: 9314.691
I0422 09:38:11.415781 133298052175680 metric_logger.py:196] completed step: 4, seconds: 0.076, TFLOP/s/device: 10.538, Tokens/s/device: 1684.299, total_weights: 4096, loss: 8.459, lm_loss: 8.459, perplexity: 4715.493
I0422 09:38:11.421390 133298052175680 metric_logger.py:196] completed step: 5, seconds: 0.070, TFLOP/s/device: 11.399, Tokens/s/device: 1821.779, total_weights: 4096, loss: 7.924, lm_loss: 7.924, perplexity: 2762.373
I0422 09:38:13.875860    2814 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0422 09:38:16.424412 133167738820352 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106/linen_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106_03_dropout/checkpoints/0/items/array_metadatas/process_6
I0422 09:38:21.289795 133298052175680 metric_logger.py:196] completed step: 6, seconds: 0.142, TFLOP/s/device: 5.626, Tokens/s/device: 899.123, total_weights: 4096, loss: 7.553, lm_loss: 7.553, perplexity: 1906.617
I0422 09:38:21.360443 133298052175680 metric_logger.py:196] completed step: 7, seconds: 9.799, TFLOP/s/device: 0.082, Tokens/s/device: 13.063, total_weights: 4096, loss: 7.267, lm_loss: 7.267, perplexity: 1431.653
I0422 09:38:21.432342 133298052175680 metric_logger.py:196] completed step: 8, seconds: 0.075, TFLOP/s/device: 10.684, Tokens/s/device: 1707.532, total_weights: 4096, loss: 7.111, lm_loss: 7.111, perplexity: 1225.983
I0422 09:38:21.502351 133298052175680 checkpointing.py:794] Waiting for step 9 to finish before checkpoint...
I0422 09:38:21.502918 133298052175680 checkpointing.py:798] Waited 0.0005886554718017578 seconds for step 9 to finish before starting checkpointing.
I0422 09:38:21.505154 133298052175680 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0422 09:38:43.340669 133168805005056 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 47.533 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 33.23192858695984 s) (per-host)
I0422 09:38:43.340796 133168805005056 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 32.945886s.
I0422 09:38:51.884645 133168805005056 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 41.489718s.
I0422 09:38:51.884924 133167219140352 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0422 09:38:51.885059 133167219140352 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0422 09:38:51.885137 133167219140352 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0422 09:38:51.886934 133167219140352 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0422 09:38:51.887147 133298052175680 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0422 09:38:51.887288 133298052175680 checkpoint_manager.py:1452] Waiting for previous save to complete took 30.382133 seconds. If this number is high, consider checkpointing less frequently.
I0422 09:38:51.889186 133298052175680 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 9
I0422 09:38:51.891243 133298052175680 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106/linen_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106_03_dropout/checkpoints/9.
I0422 09:38:52.181554 133298052175680 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0422 09:38:52.181646 133298052175680 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 09:38:52.216387 133298052175680 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.035866s
I0422 09:38:52.216562 133298052175680 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 39.203 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.039348602294921875 s) (per-host)
I0422 09:38:52.216617 133298052175680 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.039413s (batch_requests_ready=0.001849s, total_serialization_initiated=0.037493s, others=0.000071s)
I0422 09:38:52.216708 133298052175680 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.043477s (all_items=0.000015s, per_item={'items': '0.00001502'}, temp_paths=0.043462)
I0422 09:38:52.217457 133298052175680 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.33 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106/linen_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106_03_dropout/checkpoints/9.
I0422 09:38:52.217792 133167219140352 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-22 09:58:52.217754
I0422 09:38:52.219749 133298052175680 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0422 09:38:52.220004 133145621890816 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0422 09:38:52.220182 133298052175680 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106/linen_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106_03_dropout/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776850701.5051231, 'wait_for_prev_duration_secs': 30.38213324546814, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776850731.8892272, 'checkpointer_blocking_duration_secs': 0.3287079334259033, 'get_old_steps_start_time': 1776850732.217961, 'get_old_steps_duration_secs': 3.0040740966796875e-05, 'checkpoint_manager_blocking_start_time': 1776850701.5031605, 'checkpoint_manager_blocking_duration_secs': 30.716986894607544}
I0422 09:38:52.220298 133298052175680 checkpointing.py:409] Started an asynchronous checkpoint save for step 9
I0422 09:38:52.220348 133298052175680 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0422 09:38:57.665556 133145479214848 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106/linen_xpk_feat_nnx_trainstate_and_training_loop_20260422_093106_03_dropout/checkpoints/9/items/array_metadatas/process_6
I0422 09:39:33.665887 133167219140352 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 38.073 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.4886314868927 s) (per-host)
I0422 09:39:33.666017 133167219140352 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.448112s.
I0422 09:39:41.394919 133167219140352 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 49.177000s.
I0422 09:39:41.395234 133145621890816 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0422 09:39:41.395366 133145621890816 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0422 09:39:41.395428 133145621890816 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0422 09:39:41.397011 133145621890816 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0422 09:39:41.397186 133298052175680 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0422 09:39:41.397341 133298052175680 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0422 09:39:41.398351 133298052175680 metric_logger.py:196] completed step: 9, seconds: 0.071, TFLOP/s/device: 11.344, Tokens/s/device: 1813.083, total_weights: 4096, loss: 6.981, lm_loss: 6.981, perplexity: 1075.867
Per train step:
 Total TFLOPs: 0.80 
 split as 99.60% learnable weight flops and 0.40% attention flops
XPK End: Wed Apr 22 09:39:53 UTC 2026
EXIT_CODE=0