MaxView

XPK Start: Sun Apr 19 22:10:10 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 22:10:34.953676: 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 22:10:35.131678 138166740404032 max_utils.py:273] Attempting to initialize the jax distributed system...
I0419 22:10:44.171529 138166740404032 distributed.py:149] Starting JAX distributed service on [::]:8482
I0419 22:10:44.173829 138166740404032 distributed.py:172] Connecting to JAX distributed service on mt-06-grad-accum-nyp2l-slice-job-0-0.mt-06-grad-accum-nyp2l:8482
I0419 22:10:46.394285 138166740404032 max_utils.py:284] Jax distributed system initialized!
I0419 22:10:51.582746 138166740404032 max_utils.py:800] System Information: Jax Version: 0.9.2
I0419 22:10:51.582847 138166740404032 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0419 22:10:51.582887 138166740404032 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 22:10:51.582919 138166740404032 train_utils.py:378] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0419 22:10:52.278792 138166740404032 maxtext_utils.py:1718] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0419 22:10:52.279425 138166740404032 maxtext_utils.py:1718] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0419 22:10:52.279617 138166740404032 checkpointing.py:688] Setting up checkpoint logger...
I0419 22:10:52.279670 138166740404032 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True
I0419 22:10:52.279727 138166740404032 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0419 22:10:52.280089 138166740404032 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 0x7da8d7f140e0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0419 22:10:58.179375 138166740404032 checkpointing.py:266] Enabling policy for fixed interval checkpointing.
I0419 22:10:58.179554 138166740404032 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 0x7d954c0c2b70>}, handler_registry=None
I0419 22:10:58.179791 138166740404032 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d954c0c2b70>` 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 22:10:58.179839 138166740404032 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d952c501760>` 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 22:10:58.179874 138166740404032 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 0x7d954c0c2b70>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d954c0c2b70>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d952c501760>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d952c501760>}).
I0419 22:10:58.180189 138166740404032 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0419 22:10:58.180258 138166740404032 async_checkpointer.py:192] [process=4][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7d952c5642c0> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0419 22:10:59.746704 138166740404032 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_06_grad_accum/checkpoints
I0419 22:11:00.716830 138166740404032 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_06_grad_accum/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7d954c0c60c0>
I0419 22:11:00.716996 138166740404032 checkpointing.py:302] Checkpoint manager created!
I0419 22:11:02.429880 138166740404032 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0419 22:11:02.429980 138166740404032 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0419 22:11:02.817444 138166740404032 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0419 22:11:02.817531 138166740404032 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0419 22:11:02.833675 138166740404032 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0419 22:11:02.833730 138166740404032 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0419 22:11:02.857142 138166740404032 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 22:11:02.857210 138166740404032 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0419 22:11:02.873396 138166740404032 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 22:11:02.873460 138166740404032 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0419 22:11:02.889742 138166740404032 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 22:11:02.889800 138166740404032 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0419 22:11:02.914432 138166740404032 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0419 22:11:02.914495 138166740404032 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0419 22:11:02.935191 138166740404032 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0419 22:11:02.935256 138166740404032 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0419 22:11:03.151711 138166740404032 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint
I0419 22:11:03.151815 138166740404032 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0419 22:11:04.560827 138166740404032 maxtext_utils.py:1821]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0419 22:11:04.560946 138166740404032 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 22:11:04.560999 138166740404032 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 22:11:04.561058 138166740404032 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 22:11:04.561109 138166740404032 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 22:11:04.561147 138166740404032 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 22:11:04.561202 138166740404032 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 22:11:04.561255 138166740404032 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 22:11:04.561295 138166740404032 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 22:11:04.561346 138166740404032 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 22:11:04.561398 138166740404032 maxtext_utils.py:1821]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)
I0419 22:11:04.561446 138166740404032 maxtext_utils.py:1821]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')

I0419 22:11:04.585793 138166740404032 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048]............................................... Unknown.
I0419 22:11:04.585856 138166740404032 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048]............................................... (None,).
I0419 22:11:04.600523 138166740404032 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048,16,7168]....................................... Unknown.
I0419 22:11:04.600582 138166740404032 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048,16,7168]....................................... ('fsdp', None, None).
I0419 22:11:04.629822 138166740404032 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[7168,16,2048]....................................... Unknown.
I0419 22:11:04.629892 138166740404032 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[7168,16,2048]....................................... (None, None, 'fsdp').
I0419 22:11:04.644535 138166740404032 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048,16]............................................ Unknown.
I0419 22:11:04.644595 138166740404032 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048,16]............................................ (None, None).
I0419 22:11:04.673896 138166740404032 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048,16,16,128]..................................... Unknown.
I0419 22:11:04.673957 138166740404032 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048,16,16,128]..................................... ('fsdp', None, None, None).
I0419 22:11:04.693709 138166740404032 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[16,16,128,2048]..................................... Unknown.
I0419 22:11:04.693810 138166740404032 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[16,16,128,2048]..................................... (None, None, None, 'fsdp').
I0419 22:11:04.737944 138166740404032 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048,32000]......................................... Unknown.
I0419 22:11:04.738019 138166740404032 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048,32000]......................................... ('fsdp', None).
I0419 22:11:04.752976 138166740404032 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[32000,2048]......................................... Unknown.
I0419 22:11:04.753031 138166740404032 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[32000,2048]......................................... (None, 'fsdp').
I0419 22:11:05.423521 138166740404032 train.py:157] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0419 22:11:05.423618 138166740404032 train.py:157] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0419 22:11:05.439021 138166740404032 train.py:164] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0419 22:11:05.439078 138166740404032 train.py:164] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0419 22:11:16.877161 138166740404032 max_utils.py:791] Total memory size: 1.7 GB, Output size: 0.4 GB, Temp size: 1.3 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB.
I0419 22:11:16.877979 138166740404032 metric_logger.py:301] number parameters: 1.104 billion
I0419 22:11:18.725232 138166740404032 checkpointing.py:794] Waiting for step 0 to finish before checkpoint...
I0419 22:11:29.532099 138166740404032 checkpointing.py:798] Waited 10.806846141815186 seconds for step 0 to finish before starting checkpointing.
I0419 22:11:29.534430 138166740404032 checkpoint_manager.py:2009] [process=4][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0419 22:11:29.536237 138166740404032 checkpoint_manager.py:1512] [process=4] Saving checkpoint at step 0
I0419 22:11:29.537678 138166740404032 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_06_grad_accum/checkpoints/0.
I0419 22:11:30.736085 138166740404032 signaling_client.py:364] Using JaxDistributedSignalingClient
I0419 22:11:30.737011 138166740404032 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0419 22:11:30.737068 138166740404032 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 22:11:31.007503 138166740404032 base_pytree_checkpoint_handler.py:154] [process=4][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.271495s
I0419 22:11:31.007688 138166740404032 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/blocking_gbytes_per_sec: 5.572 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2768542766571045 s) (per-host)
I0419 22:11:31.007744 138166740404032 base_pytree_checkpoint_handler.py:768] [process=4][thread=MainThread] Initiated Pytree async_save. Time taken: 0.276922s (batch_requests_ready=0.002172s, total_serialization_initiated=0.274674s, others=0.000076s)
I0419 22:11:31.007837 138166740404032 composite_checkpoint_handler.py:715] [process=4][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.281118s (all_items=0.000018s, per_item={'items': '0.00001764'}, temp_paths=0.281101)
I0419 22:11:31.008610 138166740404032 event_tracking.py:125] [process=4] [async] Finished blocking save in 1.47 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_06_grad_accum/checkpoints/0.
I0419 22:11:31.008941 138041372956416 async_checkpointer.py:76] [process=4][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-19 22:31:31.008905
I0419 22:11:31.028253 138166740404032 checkpoint_manager.py:1560] [process=4][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0419 22:11:31.028538 138037631645440 async_checkpointer.py:280] [process=4][thread=save_finalize] Waiting for background save thread=async_save.
I0419 22:11:31.028677 138166740404032 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_06_grad_accum/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776636689.5344129, 'wait_for_prev_duration_secs': 5.6743621826171875e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776636689.5362744, 'checkpointer_blocking_duration_secs': 1.4728164672851562, 'get_old_steps_start_time': 1776636691.0091147, 'get_old_steps_duration_secs': 2.956390380859375e-05, 'checkpoint_manager_blocking_start_time': 1776636689.5326028, 'checkpoint_manager_blocking_duration_secs': 1.4960355758666992}
I0419 22:11:31.028781 138166740404032 checkpointing.py:409] Started an asynchronous checkpoint save for step 0
I0419 22:11:31.028832 138166740404032 max_utils.py:750] 
Memstats: After params initialized:
I0419 22:11:31.028882 138166740404032 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_16(process=4,(0,4,0,0))
I0419 22:11:31.028917 138166740404032 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_17(process=4,(1,4,0,0))
I0419 22:11:31.028942 138166740404032 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_20(process=4,(0,5,0,0))
I0419 22:11:31.028966 138166740404032 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_21(process=4,(1,5,0,0))
I0419 22:11:31.341586 138166740404032 metric_logger.py:196] completed step: 0, seconds: 1.847, TFLOP/s/device: 29.423, Tokens/s/device: 4434.957, total_weights: 262144, loss: 10.877, lm_loss: 10.877, perplexity: 52959.059
I0419 22:11:31.946026 138166740404032 metric_logger.py:196] completed step: 1, seconds: 12.615, TFLOP/s/device: 4.308, Tokens/s/device: 649.391, total_weights: 262144, loss: 10.877, lm_loss: 10.877, perplexity: 52959.059
I0419 22:11:32.524776 138166740404032 metric_logger.py:196] completed step: 2, seconds: 0.026, TFLOP/s/device: 2089.765, Tokens/s/device: 314992.118, total_weights: 262144, loss: 10.563, lm_loss: 10.563, perplexity: 38662.707
I0419 22:11:33.103561 138166740404032 metric_logger.py:196] completed step: 3, seconds: 0.584, TFLOP/s/device: 93.005, Tokens/s/device: 14018.780, total_weights: 262144, loss: 10.272, lm_loss: 10.272, perplexity: 28909.668
I0419 22:11:34.260830 138166740404032 metric_logger.py:196] completed step: 4, seconds: 0.579, TFLOP/s/device: 93.921, Tokens/s/device: 14156.845, total_weights: 262144, loss: 10.022, lm_loss: 10.022, perplexity: 22524.992
I0419 22:11:34.266898 138166740404032 metric_logger.py:196] completed step: 5, seconds: 0.579, TFLOP/s/device: 93.826, Tokens/s/device: 14142.548, total_weights: 262144, loss: 9.820, lm_loss: 9.820, perplexity: 18401.865
I0419 22:11:36.540442    2569 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0419 22:11:39.859308 138039720855296 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_06_grad_accum/checkpoints/0/items/array_metadatas/process_4
I0419 22:12:11.603717 138041372956416 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/gbytes_per_sec: 38.647 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 40.87285017967224 s) (per-host)
I0419 22:12:11.603827 138041372956416 async_checkpointer.py:90] [process=4][thread=async_save] 3 Handler Commit operations completed. Time taken: 40.594778s.
I0419 22:12:20.453643 138166740404032 metric_logger.py:196] completed step: 6, seconds: 1.157, TFLOP/s/device: 46.954, Tokens/s/device: 7077.359, total_weights: 262144, loss: 9.667, lm_loss: 9.667, perplexity: 15787.604
I0419 22:12:21.031948 138166740404032 metric_logger.py:196] completed step: 7, seconds: 45.608, TFLOP/s/device: 1.192, Tokens/s/device: 179.616, total_weights: 262144, loss: 9.561, lm_loss: 9.561, perplexity: 14203.827
I0419 22:12:21.104387 138041372956416 async_checkpointer.py:160] [process=4][thread=async_save] Background save thread done. Time taken: 50.095319s.
I0419 22:12:21.104623 138037631645440 async_checkpointer.py:288] [process=4][thread=save_finalize] Done with waiting for background save thread=async_save.
I0419 22:12:21.104695 138037631645440 async_checkpointer.py:298] [process=4][thread=save_finalize] No errors found in background save thread=async_save.
I0419 22:12:21.104757 138037631645440 checkpoint_manager.py:2137] [process=4][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0419 22:12:21.106362 138037631645440 checkpoint_manager.py:2146] [process=4][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0419 22:12:21.610501 138166740404032 metric_logger.py:196] completed step: 8, seconds: 0.584, TFLOP/s/device: 93.085, Tokens/s/device: 14030.761, total_weights: 262144, loss: 9.496, lm_loss: 9.496, perplexity: 13302.920
I0419 22:12:22.188565 138166740404032 checkpointing.py:794] Waiting for step 9 to finish before checkpoint...
I0419 22:12:22.189217 138166740404032 checkpointing.py:798] Waited 0.0006794929504394531 seconds for step 9 to finish before starting checkpointing.
I0419 22:12:22.191386 138166740404032 checkpoint_manager.py:2009] [process=4][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0419 22:12:22.193011 138166740404032 checkpoint_manager.py:1512] [process=4] Saving checkpoint at step 9
I0419 22:12:22.194747 138166740404032 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_06_grad_accum/checkpoints/9.
I0419 22:12:23.333925 138166740404032 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0419 22:12:23.334017 138166740404032 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 22:12:23.368819 138166740404032 base_pytree_checkpoint_handler.py:154] [process=4][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.035803s
I0419 22:12:23.368972 138166740404032 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/blocking_gbytes_per_sec: 39.359 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.03919243812561035 s) (per-host)
I0419 22:12:23.369021 138166740404032 base_pytree_checkpoint_handler.py:768] [process=4][thread=MainThread] Initiated Pytree async_save. Time taken: 0.039251s (batch_requests_ready=0.001635s, total_serialization_initiated=0.037550s, others=0.000066s)
I0419 22:12:23.369103 138166740404032 composite_checkpoint_handler.py:715] [process=4][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.043253s (all_items=0.000016s, per_item={'items': '0.00001645'}, temp_paths=0.043237)
I0419 22:12:23.369766 138166740404032 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_06_grad_accum/checkpoints/9.
I0419 22:12:23.370127 138037631645440 async_checkpointer.py:76] [process=4][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-19 22:32:23.370085
I0419 22:12:23.372079 138166740404032 checkpoint_manager.py:1560] [process=4][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0419 22:12:23.372364 138045642745600 async_checkpointer.py:280] [process=4][thread=save_finalize] Waiting for background save thread=async_save.
I0419 22:12:23.372521 138166740404032 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_06_grad_accum/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776636742.1913533, 'wait_for_prev_duration_secs': 7.224082946777344e-05, 'time_between_consecutive_saves_sec': 1.0849494934082031, 'checkpointer_blocking_start_time': 1776636742.1930497, 'checkpointer_blocking_duration_secs': 1.177222728729248, 'get_old_steps_start_time': 1776636743.370295, 'get_old_steps_duration_secs': 2.7179718017578125e-05, 'checkpoint_manager_blocking_start_time': 1776636742.1894567, 'checkpoint_manager_blocking_duration_secs': 1.1830291748046875}
I0419 22:12:23.372625 138166740404032 checkpointing.py:409] Started an asynchronous checkpoint save for step 9
I0419 22:12:23.372669 138166740404032 checkpoint_manager.py:2020] [process=4][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0419 22:12:30.195776 138035442198272 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_06_grad_accum/checkpoints/9/items/array_metadatas/process_4
I0419 22:13:06.347925 138037631645440 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/gbytes_per_sec: 36.719 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 43.01810908317566 s) (per-host)
I0419 22:13:06.348043 138037631645440 async_checkpointer.py:90] [process=4][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.977801s.
I0419 22:13:17.450921 138037631645440 async_checkpointer.py:160] [process=4][thread=async_save] Background save thread done. Time taken: 54.080663s.
I0419 22:13:17.451201 138045642745600 async_checkpointer.py:288] [process=4][thread=save_finalize] Done with waiting for background save thread=async_save.
I0419 22:13:17.451323 138045642745600 async_checkpointer.py:298] [process=4][thread=save_finalize] No errors found in background save thread=async_save.
I0419 22:13:17.451403 138045642745600 checkpoint_manager.py:2137] [process=4][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0419 22:13:17.453255 138045642745600 checkpoint_manager.py:2146] [process=4][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0419 22:13:17.453438 138166740404032 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 22:13:17.453581 138166740404032 checkpoint_manager.py:2009] [process=4][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0419 22:13:17.454603 138166740404032 metric_logger.py:196] completed step: 9, seconds: 0.578, TFLOP/s/device: 93.971, Tokens/s/device: 14164.311, total_weights: 262144, loss: 9.457, lm_loss: 9.457, perplexity: 12802.546
Per train step:
 Total TFLOPs: 54.35 
 split as 93.93% learnable weight flops and 6.07% attention flops
XPK End: Sun Apr 19 22:13:25 UTC 2026
EXIT_CODE=0