MaxView

XPK Start: Tue Apr 21 08:47:23 UTC 2026
PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used.
2026-04-21 08:47:46.851217: 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)
I0421 08:47:47.383340 136358402467648 max_utils.py:273] Attempting to initialize the jax distributed system...
I0421 08:47:56.423158 136358402467648 distributed.py:149] Starting JAX distributed service on [::]:8482
I0421 08:47:56.425958 136358402467648 distributed.py:172] Connecting to JAX distributed service on mt-06-grad-accum-wjbmr-slice-job-0-0.mt-06-grad-accum-wjbmr:8482
I0421 08:47:58.107376 136358402467648 max_utils.py:284] Jax distributed system initialized!
I0421 08:48:04.446978 136358402467648 max_utils.py:800] System Information: Jax Version: 0.9.2
I0421 08:48:04.447082 136358402467648 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0421 08:48:04.447123 136358402467648 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
I0421 08:48:04.447156 136358402467648 train_utils.py:378] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0421 08:48:05.149673 136358402467648 maxtext_utils.py:1718] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0421 08:48:05.150264 136358402467648 maxtext_utils.py:1718] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0421 08:48:05.150442 136358402467648 checkpointing.py:688] Setting up checkpoint logger...
I0421 08:48:05.150492 136358402467648 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True
I0421 08:48:05.150536 136358402467648 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0421 08:48:05.150887 136358402467648 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 0x7c03db3e26c0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0421 08:48:08.403251 136358402467648 checkpointing.py:266] Enabling policy for fixed interval checkpointing.
I0421 08:48:08.403436 136358402467648 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 0x7befb81409e0>}, handler_registry=None
I0421 08:48:08.403678 136358402467648 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7befb81409e0>` 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`.
I0421 08:48:08.403727 136358402467648 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7befb8144320>` 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`.
I0421 08:48:08.403764 136358402467648 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 0x7befb81409e0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7befb81409e0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7befb8144320>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7befb8144320>}).
I0421 08:48:08.404080 136358402467648 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0421 08:48:08.404149 136358402467648 async_checkpointer.py:192] [process=4][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7bef88187ec0> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0421 08:48:09.109541 136358402467648 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238/linen_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238_06_grad_accum/checkpoints
I0421 08:48:09.356230 136358402467648 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_20260421_083238/linen_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238_06_grad_accum/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7befb8140110>
I0421 08:48:09.356402 136358402467648 checkpointing.py:302] Checkpoint manager created!
I0421 08:48:11.086338 136358402467648 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0421 08:48:11.086441 136358402467648 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0421 08:48:11.466357 136358402467648 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0421 08:48:11.466445 136358402467648 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0421 08:48:11.482667 136358402467648 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0421 08:48:11.482720 136358402467648 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0421 08:48:11.506270 136358402467648 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0421 08:48:11.506337 136358402467648 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 08:48:11.522819 136358402467648 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0421 08:48:11.522882 136358402467648 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 08:48:11.539344 136358402467648 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0421 08:48:11.539406 136358402467648 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 08:48:11.564730 136358402467648 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0421 08:48:11.564793 136358402467648 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 08:48:11.590822 136358402467648 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0421 08:48:11.590926 136358402467648 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0421 08:48:11.809238 136358402467648 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint
I0421 08:48:11.809350 136358402467648 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0421 08:48:13.244368 136358402467648 maxtext_utils.py:1821]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0421 08:48:13.244487 136358402467648 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)
I0421 08:48:13.244544 136358402467648 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)
I0421 08:48:13.244607 136358402467648 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')
I0421 08:48:13.244730 136358402467648 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)
I0421 08:48:13.244775 136358402467648 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)
I0421 08:48:13.244827 136358402467648 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)
I0421 08:48:13.244878 136358402467648 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')
I0421 08:48:13.244918 136358402467648 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)
I0421 08:48:13.244953 136358402467648 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)
I0421 08:48:13.244999 136358402467648 maxtext_utils.py:1821]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)

I0421 08:48:13.245046 136358402467648 maxtext_utils.py:1821]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')
I0421 08:48:13.272289 136358402467648 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048]............................................... Unknown.
I0421 08:48:13.272367 136358402467648 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048]............................................... (None,).
I0421 08:48:13.287107 136358402467648 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048,16,7168]....................................... Unknown.
I0421 08:48:13.287171 136358402467648 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048,16,7168]....................................... ('fsdp', None, None).
I0421 08:48:13.316449 136358402467648 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[7168,16,2048]....................................... Unknown.
I0421 08:48:13.316515 136358402467648 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[7168,16,2048]....................................... (None, None, 'fsdp').
I0421 08:48:13.331129 136358402467648 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048,16]............................................ Unknown.
I0421 08:48:13.331182 136358402467648 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048,16]............................................ (None, None).
I0421 08:48:13.360404 136358402467648 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048,16,16,128]..................................... Unknown.
I0421 08:48:13.360474 136358402467648 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048,16,16,128]..................................... ('fsdp', None, None, None).
I0421 08:48:13.375179 136358402467648 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[16,16,128,2048]..................................... Unknown.
I0421 08:48:13.375236 136358402467648 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[16,16,128,2048]..................................... (None, None, None, 'fsdp').
I0421 08:48:13.419243 136358402467648 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048,32000]......................................... Unknown.
I0421 08:48:13.419318 136358402467648 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048,32000]......................................... ('fsdp', None).
I0421 08:48:13.433911 136358402467648 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[32000,2048]......................................... Unknown.
I0421 08:48:13.433967 136358402467648 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[32000,2048]......................................... (None, 'fsdp').
I0421 08:48:14.104691 136358402467648 train.py:157] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0421 08:48:14.104783 136358402467648 train.py:157] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0421 08:48:14.120481 136358402467648 train.py:164] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0421 08:48:14.120539 136358402467648 train.py:164] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0421 08:48:25.520330 136358402467648 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.
I0421 08:48:25.521225 136358402467648 metric_logger.py:301] number parameters: 1.104 billion
I0421 08:48:27.383122 136358402467648 checkpointing.py:794] Waiting for step 0 to finish before checkpoint...
I0421 08:48:38.289026 136358402467648 checkpointing.py:798] Waited 10.905884265899658 seconds for step 0 to finish before starting checkpointing.
I0421 08:48:38.291384 136358402467648 checkpoint_manager.py:2009] [process=4][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0421 08:48:38.293192 136358402467648 checkpoint_manager.py:1512] [process=4] Saving checkpoint at step 0
I0421 08:48:38.294901 136358402467648 event_tracking.py:70] [process=4] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238/linen_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238_06_grad_accum/checkpoints/0.
I0421 08:48:39.000566 136358402467648 signaling_client.py:364] Using JaxDistributedSignalingClient
I0421 08:48:39.001567 136358402467648 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0421 08:48:39.001623 136358402467648 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
I0421 08:48:39.274798 136358402467648 base_pytree_checkpoint_handler.py:154] [process=4][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.274309s
I0421 08:48:39.274982 136358402467648 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/blocking_gbytes_per_sec: 5.517 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.27959752082824707 s) (per-host)
I0421 08:48:39.275044 136358402467648 base_pytree_checkpoint_handler.py:768] [process=4][thread=MainThread] Initiated Pytree async_save. Time taken: 0.279671s (batch_requests_ready=0.002194s, total_serialization_initiated=0.277395s, others=0.000082s)
I0421 08:48:39.275140 136358402467648 composite_checkpoint_handler.py:715] [process=4][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.283971s (all_items=0.000018s, per_item={'items': '0.00001812'}, temp_paths=0.283952)
I0421 08:48:39.275926 136358402467648 event_tracking.py:125] [process=4] [async] Finished blocking save in 0.98 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238/linen_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238_06_grad_accum/checkpoints/0.
I0421 08:48:39.276257 136230180218624 async_checkpointer.py:76] [process=4][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-21 09:08:39.276215
I0421 08:48:39.292009 136358402467648 checkpoint_manager.py:1560] [process=4][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0421 08:48:39.292280 136227999045376 async_checkpointer.py:280] [process=4][thread=save_finalize] Waiting for background save thread=async_save.
I0421 08:48:39.292417 136358402467648 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238/linen_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238_06_grad_accum/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776761318.2913651, 'wait_for_prev_duration_secs': 6.079673767089844e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776761318.293232, 'checkpointer_blocking_duration_secs': 0.9831745624542236, 'get_old_steps_start_time': 1776761319.2764304, 'get_old_steps_duration_secs': 3.123283386230469e-05, 'checkpoint_manager_blocking_start_time': 1776761318.2895324, 'checkpoint_manager_blocking_duration_secs': 1.0028455257415771}
I0421 08:48:39.292524 136358402467648 checkpointing.py:409] Started an asynchronous checkpoint save for step 0
I0421 08:48:39.292574 136358402467648 max_utils.py:750] 
Memstats: After params initialized:
I0421 08:48:39.292624 136358402467648 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_16(process=4,(0,4,0,0))
I0421 08:48:39.292669 136358402467648 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_17(process=4,(1,4,0,0))
I0421 08:48:39.292696 136358402467648 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_20(process=4,(0,5,0,0))
I0421 08:48:39.292720 136358402467648 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_21(process=4,(1,5,0,0))
I0421 08:48:39.604117 136358402467648 metric_logger.py:196] completed step: 0, seconds: 1.862, TFLOP/s/device: 29.192, Tokens/s/device: 4400.088, total_weights: 262144, loss: 10.877, lm_loss: 10.877, perplexity: 52959.059
I0421 08:48:40.217105 136358402467648 metric_logger.py:196] completed step: 1, seconds: 12.219, TFLOP/s/device: 4.448, Tokens/s/device: 670.405, total_weights: 262144, loss: 10.877, lm_loss: 10.877, perplexity: 52959.059
I0421 08:48:40.795607 136358402467648 metric_logger.py:196] completed step: 2, seconds: 0.035, TFLOP/s/device: 1559.633, Tokens/s/device: 235084.799, total_weights: 262144, loss: 10.563, lm_loss: 10.563, perplexity: 38662.707
I0421 08:48:41.374135 136358402467648 metric_logger.py:196] completed step: 3, seconds: 0.584, TFLOP/s/device: 93.012, Tokens/s/device: 14019.715, total_weights: 262144, loss: 10.272, lm_loss: 10.272, perplexity: 28909.668
I0421 08:48:42.531201 136358402467648 metric_logger.py:196] completed step: 4, seconds: 0.578, TFLOP/s/device: 93.977, Tokens/s/device: 14165.242, total_weights: 262144, loss: 10.022, lm_loss: 10.022, perplexity: 22524.992
I0421 08:48:42.537223 136358402467648 metric_logger.py:196] completed step: 5, seconds: 0.579, TFLOP/s/device: 93.843, Tokens/s/device: 14145.014, total_weights: 262144, loss: 9.820, lm_loss: 9.820, perplexity: 18401.865
I0421 08:48:48.053363    2609 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0421 08:48:50.147305 136228520216320 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_20260421_083238/linen_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238_06_grad_accum/checkpoints/0/items/array_metadatas/process_4
I0421 08:49:22.956655 136230180218624 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/gbytes_per_sec: 35.932 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 43.96121644973755 s) (per-host)
I0421 08:49:22.956780 136230180218624 async_checkpointer.py:90] [process=4][thread=async_save] 3 Handler Commit operations completed. Time taken: 43.680413s.
I0421 08:49:29.736113 136358402467648 metric_logger.py:196] completed step: 6, seconds: 1.157, TFLOP/s/device: 46.975, Tokens/s/device: 7080.552, total_weights: 262144, loss: 9.667, lm_loss: 9.667, perplexity: 15787.604
I0421 08:49:30.314451 136358402467648 metric_logger.py:196] completed step: 7, seconds: 46.621, TFLOP/s/device: 1.166, Tokens/s/device: 175.714, total_weights: 262144, loss: 9.561, lm_loss: 9.561, perplexity: 14203.827
I0421 08:49:30.892726 136358402467648 metric_logger.py:196] completed step: 8, seconds: 0.583, TFLOP/s/device: 93.182, Tokens/s/device: 14045.363, total_weights: 262144, loss: 9.496, lm_loss: 9.496, perplexity: 13302.920
I0421 08:49:31.470397 136358402467648 checkpointing.py:794] Waiting for step 9 to finish before checkpoint...
I0421 08:49:31.471085 136358402467648 checkpointing.py:798] Waited 0.00070953369140625 seconds for step 9 to finish before starting checkpointing.
I0421 08:49:31.473380 136358402467648 checkpoint_manager.py:2020] [process=4][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0421 08:49:32.210010 136230180218624 async_checkpointer.py:160] [process=4][thread=async_save] Background save thread done. Time taken: 52.933626s.
I0421 08:49:32.210242 136227999045376 async_checkpointer.py:288] [process=4][thread=save_finalize] Done with waiting for background save thread=async_save.
I0421 08:49:32.210299 136227999045376 async_checkpointer.py:298] [process=4][thread=save_finalize] No errors found in background save thread=async_save.
I0421 08:49:32.210348 136227999045376 checkpoint_manager.py:2137] [process=4][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0421 08:49:32.212717 136227999045376 checkpoint_manager.py:2146] [process=4][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0421 08:49:32.212840 136358402467648 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.
I0421 08:49:32.214343 136358402467648 checkpoint_manager.py:1512] [process=4] Saving checkpoint at step 9
I0421 08:49:32.216209 136358402467648 event_tracking.py:70] [process=4] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238/linen_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238_06_grad_accum/checkpoints/9.
I0421 08:49:32.936348 136358402467648 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0421 08:49:32.936441 136358402467648 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
I0421 08:49:32.971659 136358402467648 base_pytree_checkpoint_handler.py:154] [process=4][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.036391s
I0421 08:49:32.971810 136358402467648 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/blocking_gbytes_per_sec: 38.763 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.039794921875 s) (per-host)
I0421 08:49:32.971860 136358402467648 base_pytree_checkpoint_handler.py:768] [process=4][thread=MainThread] Initiated Pytree async_save. Time taken: 0.039854s (batch_requests_ready=0.001656s, total_serialization_initiated=0.038131s, others=0.000066s)
I0421 08:49:32.971945 136358402467648 composite_checkpoint_handler.py:715] [process=4][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.044097s (all_items=0.000017s, per_item={'items': '0.00001669'}, temp_paths=0.044080)
I0421 08:49:32.972677 136358402467648 event_tracking.py:125] [process=4] [async] Finished blocking save in 0.76 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238/linen_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238_06_grad_accum/checkpoints/9.
I0421 08:49:32.972953 136227999045376 async_checkpointer.py:76] [process=4][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-21 09:09:32.972929
I0421 08:49:32.978816 136358402467648 checkpoint_manager.py:1560] [process=4][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0421 08:49:32.979115 136234433222400 async_checkpointer.py:280] [process=4][thread=save_finalize] Waiting for background save thread=async_save.
I0421 08:49:32.979284 136358402467648 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238/linen_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238_06_grad_accum/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776761371.473351, 'wait_for_prev_duration_secs': 0.7395334243774414, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776761372.2143815, 'checkpointer_blocking_duration_secs': 0.7586724758148193, 'get_old_steps_start_time': 1776761372.9730783, 'get_old_steps_duration_secs': 3.0040740966796875e-05, 'checkpoint_manager_blocking_start_time': 1776761371.4713178, 'checkpoint_manager_blocking_duration_secs': 1.507932186126709}
I0421 08:49:32.979397 136358402467648 checkpointing.py:409] Started an asynchronous checkpoint save for step 9
I0421 08:49:32.979442 136358402467648 checkpoint_manager.py:2020] [process=4][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0421 08:49:39.805453 136229651740416 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_20260421_083238/linen_xpk_feat_nnx_trainstate_and_training_loop_20260421_083238_06_grad_accum/checkpoints/9/items/array_metadatas/process_4
I0421 08:50:15.638050 136227999045376 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/gbytes_per_sec: 36.988 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.705992460250854 s) (per-host)
I0421 08:50:15.638179 136227999045376 async_checkpointer.py:90] [process=4][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.665148s.
I0421 08:50:24.007287 136227999045376 async_checkpointer.py:160] [process=4][thread=async_save] Background save thread done. Time taken: 51.034242s.
I0421 08:50:24.007579 136234433222400 async_checkpointer.py:288] [process=4][thread=save_finalize] Done with waiting for background save thread=async_save.
I0421 08:50:24.007732 136234433222400 async_checkpointer.py:298] [process=4][thread=save_finalize] No errors found in background save thread=async_save.
I0421 08:50:24.007781 136234433222400 checkpoint_manager.py:2137] [process=4][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0421 08:50:24.009119 136234433222400 checkpoint_manager.py:2146] [process=4][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0421 08:50:24.009303 136358402467648 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.
I0421 08:50:24.009452 136358402467648 checkpoint_manager.py:2009] [process=4][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0421 08:50:24.010363 136358402467648 metric_logger.py:196] completed step: 9, seconds: 0.578, TFLOP/s/device: 93.979, Tokens/s/device: 14165.609, 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: Tue Apr 21 08:50:33 UTC 2026
EXIT_CODE=0