MaxView

2026-04-21 16:04:22.938272: E external/local_xla/xla/stream_executor/cuda/cuda_fft.cc:467] Unable to register cuFFT factory: Attempting to register factory for plugin cuFFT when one has already been registered
WARNING: All log messages before absl::InitializeLog() is called are written to STDERR
E0000 00:00:1776787462.949582 1549180 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered
E0000 00:00:1776787462.952941 1549180 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered
W0000 00:00:1776787462.963930 1549180 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776787462.963942 1549180 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776787462.963944 1549180 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776787462.963946 1549180 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
2026-04-21 16:04:26.336790: 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 16:04:26.452470 125316462865536 max_utils.py:238] Skipping jax distributed system due to skip_jax_distributed_system=True flag.
~/maxtext/maxtext_venv/lib/python3.12/site-packages/jax/_src/xla_bridge.py:204: UserWarning: TPU backend initialization is taking more than 60.0 seconds. Did you run your code on all TPU hosts? See https://docs.jax.dev/en/latest/multi_process.html for more information.
  warnings.warn(
I0421 16:05:31.802644 125316462865536 max_utils.py:800] System Information: Jax Version: 0.8.1
I0421 16:05:31.802931 125316462865536 max_utils.py:801] System Information: Jaxlib Version: 0.8.1
I0421 16:05:31.802979 125316462865536 max_utils.py:802] System Information: Jax Backend: PJRT C API
TFRT TPU v6 lite
Built on Nov 12 2025 14:16:36 (1762985796) cl/831091709
I0421 16:05:31.803007 125316462865536 train_utils.py:335] WARNING: 'dataset_path' might be pointing your local file system
I0421 16:05:31.803029 125316462865536 train_utils.py:348] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0421 16:05:31.803202 125316462865536 train.py:703] [DECOUPLED NO-OP] skipping cloud diagnostics wrapper.
I0421 16:05:32.163170 125316462865536 maxtext_utils.py:1551] Num_devices: 8, shape (1, 1, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0421 16:05:32.163531 125316462865536 checkpointing.py:677] Setting up checkpoint logger...
I0421 16:05:32.163580 125316462865536 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=False
I0421 16:05:32.163664 125316462865536 pytree_checkpoint_handler.py:577] save_device_host_concurrent_bytes=None
I0421 16:05:32.164466 125316462865536 base_pytree_checkpoint_handler.py:411] Created BasePyTreeCheckpointHandler: use_ocdbt=True, use_zarr3=False, pytree_metadata_options=PyTreeMetadataOptions(support_rich_types=False), array_metadata_store=<orbax.checkpoint._src.metadata.array_metadata_store.Store object at 0x71f9399adf10>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0421 16:05:34.539593 125316462865536 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0421 16:05:34.539840 125316462865536 checkpoint_manager.py:702] [process=0][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x71f7e6fe6c00>}, handler_registry=None
I0421 16:05:34.540240 125316462865536 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x71f7e6fe6c00>` 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 16:05:34.540285 125316462865536 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x71f7e29505c0>` 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 16:05:34.540316 125316462865536 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 0x71f7e6fe6c00>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x71f7e6fe6c00>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x71f7e29505c0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x71f7e29505c0>}).
I0421 16:05:34.540599 125316462865536 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.28
I0421 16:05:34.540668 125316462865536 async_checkpointer.py:177] [process=0][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>.<lambda> at 0x71f7917ad300> timeout: 600 secs and primary_host=0 for async checkpoint writes
I0421 16:05:34.669011 125316462865536 checkpoint_manager.py:1788] Found 0 checkpoint steps in gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints
I0421 16:05:34.669285 125316462865536 checkpoint_manager.py:921] [process=0][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_hns=False, enable_background_delete=False, read_only=False, enable_async_checkpointing=True, async_options=None, multiprocessing_options=MultiprocessingOptions(primary_host=0, active_processes=None, barrier_sync_key_prefix=None), should_save_fn=None, file_options=FileOptions(path_permission_mode=None), save_root_metadata=True, temporary_path_class=None, save_decision_policy=FixedIntervalPolicy(interval=5), preservation_policy=LatestN(n=None), prevent_write_metrics=False, enable_should_save_is_saving_in_progress_check=True, enable_per_process_directory_creation=False), root_directory=gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x71f791baeae0>
I0421 16:05:34.669377 125316462865536 checkpointing.py:301] Checkpoint manager created!
I0421 16:05:35.300225 125316462865536 nnx_wrappers.py:437] Unknown Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0421 16:05:35.300309 125316462865536 nnx_wrappers.py:437] Unknown Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None).
I0421 16:05:35.593309 125316462865536 attentions.py:1088] attentions/inputs_q Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0421 16:05:35.593385 125316462865536 attentions.py:1088] attentions/inputs_q Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None).
I0421 16:05:35.605330 125316462865536 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0421 16:05:35.605378 125316462865536 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None).
I0421 16:05:35.624200 125316462865536 attentions.py:1154] attentions/query Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0421 16:05:35.624254 125316462865536 attentions.py:1154] attentions/query Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None).
I0421 16:05:35.636278 125316462865536 attentions.py:1155] attentions/key Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0421 16:05:35.636326 125316462865536 attentions.py:1155] attentions/key Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None).
I0421 16:05:35.648209 125316462865536 attentions.py:1156] attentions/value Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0421 16:05:35.648255 125316462865536 attentions.py:1156] attentions/value Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None).
I0421 16:05:35.667261 125316462865536 attentions.py:1197] attentions/out Logical: bfloat16[8,2048,16,128]..................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0421 16:05:35.667314 125316462865536 attentions.py:1197] attentions/out Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None).
I0421 16:05:35.682459 125316462865536 linears.py:525] linears/x Logical: bfloat16[8,2048,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0421 16:05:35.682508 125316462865536 linears.py:525] linears/x Physical: bfloat16[8,2048,7168]....................................... ('fsdp', None, None).
I0421 16:05:35.830309 125316462865536 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0421 16:05:35.830398 125316462865536 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint.
[DECOUPLED NO-OP] gcs_storage: using stubs.
[DECOUPLED NO-OP] mldiagnostics: using stub.
[DECOUPLED NO-OP] mldiagnostics: using stub.
[DECOUPLED NO-OP] mldiagnostics: using stub.
[DECOUPLED NO-OP] workload_monitor: using stub.
[DECOUPLED NO-OP] vertex_tensorboard: using stub.
fsdp: 8
I0421 16:05:36.390863 125316462865536 maxtext_utils.py:1654]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   PartitionSpec('norm',)
    Physical:  (None,)
I0421 16:05:36.390976 125316462865536 maxtext_utils.py:1654]  params/params/decoder/layers/mlp/wi_0/kernel
    Shape:     float32[2048,16,7168]
    Logical:   PartitionSpec('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0421 16:05:36.391018 125316462865536 maxtext_utils.py:1654]  params/params/decoder/layers/mlp/wi_1/kernel
    Shape:     float32[2048,16,7168]
    Logical:   PartitionSpec('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0421 16:05:36.391079 125316462865536 maxtext_utils.py:1654]  params/params/decoder/layers/mlp/wo/kernel
    Shape:     float32[7168,16,2048]
    Logical:   PartitionSpec('mlp', 'layers', 'embed')
    Physical:  (None, None, 'fsdp')
I0421 16:05:36.391123 125316462865536 maxtext_utils.py:1654]  params/params/decoder/layers/post_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   PartitionSpec('norm', 'layers')
    Physical:  (None, None)
I0421 16:05:36.391152 125316462865536 maxtext_utils.py:1654]  params/params/decoder/layers/pre_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   PartitionSpec('norm', 'layers')
    Physical:  (None, None)
I0421 16:05:36.391191 125316462865536 maxtext_utils.py:1654]  params/params/decoder/layers/self_attention/key/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   PartitionSpec('embed', 'layers', 'kv_heads', 'kv_head_dim')
    Physical:  ('fsdp', None, None, None)
I0421 16:05:36.391230 125316462865536 maxtext_utils.py:1654]  params/params/decoder/layers/self_attention/out/kernel
    Shape:     float32[16,16,128,2048]
    Logical:   PartitionSpec('heads', 'layers', 'kv', 'embed')
    Physical:  (None, None, None, 'fsdp')
I0421 16:05:36.391260 125316462865536 maxtext_utils.py:1654]  params/params/decoder/layers/self_attention/query/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   PartitionSpec('embed', 'layers', 'q_heads', 'kv')
    Physical:  ('fsdp', None, None, None)
I0421 16:05:36.391286 125316462865536 maxtext_utils.py:1654]  params/params/decoder/layers/self_attention/value/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   PartitionSpec('embed', 'layers', 'kv_heads', 'kv_head_dim')
    Physical:  ('fsdp', None, None, None)
I0421 16:05:36.391320 125316462865536 maxtext_utils.py:1654]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   PartitionSpec('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)
I0421 16:05:36.391353 125316462865536 maxtext_utils.py:1654]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   PartitionSpec('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')

I0421 16:05:36.792179 125316462865536 train.py:155] train/xent Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length').
I0421 16:05:36.792258 125316462865536 train.py:155] train/xent Physical: float32[8,2048]............................................. ('fsdp', None).
I0421 16:05:36.803618 125316462865536 train.py:162] train/z_loss Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length').
I0421 16:05:36.803665 125316462865536 train.py:162] train/z_loss Physical: float32[8,2048]............................................. ('fsdp', None).
I0421 16:05:37.537647 125316462865536 max_utils.py:791] Total memory size: 3.6 GB, Output size: 1.5 GB, Temp size: 2.0 GB, Argument size: 1.5 GB, Host temp size: 0.0 GB.
I0421 16:05:37.538199 125316462865536 max_utils.py:194] tensorboardX not available; using no-op SummaryWriter.
I0421 16:05:37.538348 125316462865536 metric_logger.py:301] number parameters: 1.104 billion
I0421 16:05:39.308271 125316462865536 checkpointing.py:772] Waiting for step 0 to finish before checkpoint...
I0421 16:05:39.425775 125316462865536 checkpointing.py:776] Waited 0.11749124526977539 seconds for step 0 to finish before starting checkpointing.
I0421 16:05:39.426228 125316462865536 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0421 16:05:39.426374 125316462865536 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 0
I0421 16:05:39.426745 125316462865536 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints/0.
I0421 16:05:39.510798 125316462865536 signaling_client.py:373] Using ThreadSafeKeyValueSignalingClient
I0421 16:05:39.591259 125232306193984 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints/0
I0421 16:05:39.606365 125316462865536 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array.
I0421 16:05:39.606454 125316462865536 replica_slices.py:410] 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 16:05:40.338712 125232295708224 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints/0/items
I0421 16:05:40.443657 125232251668032 checkpoint.py:188] Wrote Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776787540199141590, 'commit_timestamp_nsecs': None, 'custom_metadata': {}}, json={"item_handlers": null, "metrics": {}, "performance_metrics": {}, "init_timestamp_nsecs": 1776787540199141590, "commit_timestamp_nsecs": null, "custom_metadata": {}} to gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints/0/_CHECKPOINT_METADATA
I0421 16:05:40.701583 125316462865536 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 1.095620s
I0421 16:05:40.701980 125316462865536 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 10.369 GiB/s (total gbytes: 12.3 GiB) (time elapsed: a second) (per-host)
I0421 16:05:40.702029 125316462865536 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 1.190282s (batch_requests_ready=0.090852s, total_serialization_initiated=1.099121s, others=0.000309s)
I0421 16:05:40.702102 125316462865536 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.190825s (all_items=0.000018s, per_item={'items': '0.00001764'}, temp_paths=1.190807)
I0421 16:05:40.702810 125232230696512 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started.
I0421 16:05:40.702901 125316462865536 async_checkpointer.py:561] Finished blocking save. Time taken: 1.276490s. Continuing background save to gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints/0.
I0421 16:05:40.703101 125316462865536 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0421 16:05:40.703315 125232316679744 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save.
I0421 16:05:40.703417 125316462865536 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776787539.4262156, 'wait_for_prev_duration_secs': 3.933906555175781e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776787539.4263937, 'checkpointer_blocking_duration_secs': 1.276623249053955, 'get_old_steps_start_time': 1776787540.7030323, 'get_old_steps_duration_secs': 3.695487976074219e-05, 'checkpoint_manager_blocking_start_time': 1776787539.426136, 'checkpoint_manager_blocking_duration_secs': 1.277256965637207}
I0421 16:05:40.703531 125316462865536 checkpointing.py:408] Started an asynchronous checkpoint save for step 0
I0421 16:05:40.703569 125316462865536 max_utils.py:750] 
Memstats: After params initialized:
I0421 16:05:40.703631 125316462865536 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_0(process=0,(0,0,0,0))
I0421 16:05:40.703656 125316462865536 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_1(process=0,(1,0,0,0))
I0421 16:05:40.703675 125316462865536 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_2(process=0,(0,1,0,0))
I0421 16:05:40.703693 125316462865536 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_3(process=0,(1,1,0,0))
I0421 16:05:40.703710 125316462865536 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_4(process=0,(0,2,0,0))
I0421 16:05:40.703727 125316462865536 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_5(process=0,(1,2,0,0))
I0421 16:05:40.703743 125316462865536 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_6(process=0,(0,3,0,0))
I0421 16:05:40.703759 125316462865536 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_7(process=0,(1,3,0,0))
I0421 16:05:40.790086 1551259 google_auth_provider.cc:149] Using credentials at ~/.config/gcloud/application_default_credentials.json
I0421 16:05:40.790153 1551259 google_auth_provider.cc:156] Using OAuth2 AuthProvider
I0421 16:05:40.956033 125316462865536 metric_logger.py:196] completed step: 0, seconds: 1.769, TFLOP/s/device: 7.679, Tokens/s/device: 1157.454, total_weights: 16384, loss: 10.874, lm_loss: 10.874, perplexity: 52770.941
I0421 16:05:40.956947 125316462865536 metric_logger.py:281] To see full metrics 'tensorboard --logdir=gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/tensorboard/'
I0421 16:05:41.072938 125316462865536 metric_logger.py:196] completed step: 1, seconds: 1.646, TFLOP/s/device: 8.255, Tokens/s/device: 1244.314, total_weights: 16384, loss: 10.874, lm_loss: 10.874, perplexity: 52770.941
I0421 16:05:41.191755 125316462865536 metric_logger.py:196] completed step: 2, seconds: 0.006, TFLOP/s/device: 2332.154, Tokens/s/device: 351527.635, total_weights: 16384, loss: 10.276, lm_loss: 10.276, perplexity: 29019.973
I0421 16:05:41.311028 125316462865536 metric_logger.py:196] completed step: 3, seconds: 0.117, TFLOP/s/device: 115.655, Tokens/s/device: 17432.755, total_weights: 16384, loss: 9.282, lm_loss: 9.282, perplexity: 10739.224
I0421 16:05:41.315942 125316462865536 checkpointing.py:772] Waiting for step 5 to finish before checkpoint...
I0421 16:05:41.548206 125316462865536 checkpointing.py:776] Waited 0.23223304748535156 seconds for step 5 to finish before starting checkpointing.
I0421 16:05:41.548570 125316462865536 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0421 16:05:41.597038 125232306193984 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints/0/items/array_metadatas/process_0
I0421 16:06:22.331188 125232285222464 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 41.539136s (commit=41.095372s, array_metadata_write=0.443764s)
I0421 16:06:22.332282 125232230696512 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 295.111 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 42 seconds) (per-host)
I0421 16:06:22.332388 125232230696512 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.629433s.
I0421 16:06:22.598305 125232230696512 checkpoint.py:228] Read Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776787540199141590, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} from gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints/0/_CHECKPOINT_METADATA
I0421 16:06:22.783422 125232230696512 array_metadata_store.py:367] [process=0][thread=async_save] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0.
I0421 16:06:22.977339 125232251668032 checkpoint.py:247] Updated Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776787540199141590, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} to gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints/0/_CHECKPOINT_METADATA
I0421 16:06:23.307421 125232230696512 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.668592s. use_zarr3=False, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints/0/items
I0421 16:06:23.308160 125232230696512 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints/0/items
I0421 16:06:23.562328 125232230696512 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints/0
I0421 16:06:24.255191 125232230696512 atomicity.py:794] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints/0`.
I0421 16:06:24.255805 125232230696512 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 44.829399s. directory=gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints/0
I0421 16:06:24.255886 125232230696512 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 43.552932s.
I0421 16:06:24.256071 125232316679744 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save.
I0421 16:06:24.256181 125232316679744 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save.
I0421 16:06:24.256245 125232316679744 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0421 16:06:24.256291 125232316679744 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0421 16:06:24.256420 125316462865536 checkpoint_manager.py:2006] [process=0][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0421 16:06:24.256540 125316462865536 checkpoint_manager.py:1441] Waiting for previous save to complete took 42.707968 seconds. If this number is high, consider checkpointing less frequently.
I0421 16:06:24.257468 125316462865536 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 5
I0421 16:06:24.257759 125316462865536 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints/5.
I0421 16:06:24.426885 125232316679744 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints/5
I0421 16:06:24.430616 125316462865536 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array.
I0421 16:06:24.430713 125316462865536 replica_slices.py:410] 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 16:06:25.147197 125232163587648 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints/5/items
I0421 16:06:33.529826 125316462865536 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 9.099718s
I0421 16:06:33.534010 125316462865536 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 1.341 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 9 seconds) (per-host)
I0421 16:06:33.534267 125316462865536 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 9.201712s (batch_requests_ready=0.094497s, total_serialization_initiated=9.102978s, others=0.004237s)
I0421 16:06:33.534385 125316462865536 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 9.202247s (all_items=0.000018s, per_item={'items': '0.00001836'}, temp_paths=9.202229)
I0421 16:06:33.535673 125232316679744 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started.
I0421 16:06:33.535754 125316462865536 async_checkpointer.py:561] Finished blocking save. Time taken: 9.278241s. Continuing background save to gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints/5.
I0421 16:06:33.535965 125316462865536 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=5] Starting CheckpointManager Save Finalize thread=save_finalize
I0421 16:06:33.536162 125232230696512 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save.
I0421 16:06:33.536288 125316462865536 standard_logger.py:34] {'step': 5, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776787541.5485487, 'wait_for_prev_duration_secs': 42.70796847343445, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776787584.2574909, 'checkpointer_blocking_duration_secs': 9.278367042541504, 'get_old_steps_start_time': 1776787593.5358813, 'get_old_steps_duration_secs': 2.956390380859375e-05, 'checkpoint_manager_blocking_start_time': 1776787541.5484874, 'checkpoint_manager_blocking_duration_secs': 51.987772941589355}
I0421 16:06:33.536510 125316462865536 checkpointing.py:408] Started an asynchronous checkpoint save for step 5
I0421 16:06:33.537224 125316462865536 metric_logger.py:196] completed step: 4, seconds: 0.119, TFLOP/s/device: 113.853, Tokens/s/device: 17161.196, total_weights: 16384, loss: 8.327, lm_loss: 8.327, perplexity: 4134.812
I0421 16:06:33.544880 125316462865536 metric_logger.py:196] completed step: 5, seconds: 0.119, TFLOP/s/device: 114.164, Tokens/s/device: 17208.060, total_weights: 16384, loss: 7.367, lm_loss: 7.367, perplexity: 1583.522
I0421 16:06:33.661390 125316462865536 metric_logger.py:196] completed step: 6, seconds: 52.227, TFLOP/s/device: 0.260, Tokens/s/device: 39.214, total_weights: 16384, loss: 6.459, lm_loss: 6.459, perplexity: 638.363
I0421 16:06:33.780318 125316462865536 metric_logger.py:196] completed step: 7, seconds: 0.006, TFLOP/s/device: 2214.330, Tokens/s/device: 333767.927, total_weights: 16384, loss: 5.622, lm_loss: 5.622, perplexity: 276.577
I0421 16:06:33.898908 125316462865536 metric_logger.py:196] completed step: 8, seconds: 0.117, TFLOP/s/device: 115.904, Tokens/s/device: 17470.378, total_weights: 16384, loss: 4.864, lm_loss: 4.864, perplexity: 129.523
I0421 16:06:34.017126 125316462865536 checkpointing.py:772] Waiting for step 9 to finish before checkpoint...
I0421 16:06:34.017938 125316462865536 checkpointing.py:776] Waited 0.0008263587951660156 seconds for step 9 to finish before starting checkpointing.
I0421 16:06:34.018204 125316462865536 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=5][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0421 16:06:34.298206 125232306193984 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints/5/items/array_metadatas/process_0
I0421 16:07:12.134113 125232163587648 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 38.599372s (commit=38.166527s, array_metadata_write=0.432845s)
I0421 16:07:12.135035 125232316679744 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 264.354 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 47 seconds) (per-host)
I0421 16:07:12.135097 125232316679744 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 38.599302s.
I0421 16:07:12.573288 125232316679744 array_metadata_store.py:367] [process=0][thread=async_save] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0.
I0421 16:07:13.052111 125232316679744 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.636409s. use_zarr3=False, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints/5/items
I0421 16:07:13.052801 125232316679744 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints/5/items
I0421 16:07:13.295394 125232316679744 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints/5
I0421 16:07:14.002622 125232316679744 atomicity.py:794] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints/5`.
I0421 16:07:14.003265 125232316679744 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 49.745759s. directory=gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints/5
I0421 16:07:14.003330 125232316679744 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 40.467536s.
I0421 16:07:14.003482 125232230696512 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save.
I0421 16:07:14.003578 125232230696512 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save.
I0421 16:07:14.003638 125232230696512 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=5] CheckpointManager Save Finalize is syncing with other hosts...
I0421 16:07:14.003677 125232230696512 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=5] CheckpointManager Save Finalize is done on all hosts.
I0421 16:07:14.003815 125316462865536 checkpoint_manager.py:2006] [process=0][thread=MainThread][step=5][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=5.
W0421 16:07:14.003935 125316462865536 checkpoint_manager.py:1441] Waiting for previous save to complete took 39.985742 seconds. If this number is high, consider checkpointing less frequently.
I0421 16:07:14.004160 125316462865536 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 9
I0421 16:07:14.004440 125316462865536 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints/9.
I0421 16:07:14.196094 125232316679744 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints/9
I0421 16:07:14.207447 125316462865536 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array.
I0421 16:07:14.207543 125316462865536 replica_slices.py:410] 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 16:07:14.890423 125232285222464 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints/9/items
I0421 16:07:29.214435 125316462865536 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 15.007313s
I0421 16:07:29.218846 125316462865536 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 835.998 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 15 seconds) (per-host)
I0421 16:07:29.218906 125316462865536 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 15.115896s (batch_requests_ready=0.101160s, total_serialization_initiated=15.010484s, others=0.004251s)
I0421 16:07:29.218986 125316462865536 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 15.116427s (all_items=0.000013s, per_item={'items': '0.00001264'}, temp_paths=15.116414)
I0421 16:07:29.220375 125233126180416 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started.
I0421 16:07:29.220456 125316462865536 async_checkpointer.py:561] Finished blocking save. Time taken: 15.216254s. Continuing background save to gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints/9.
I0421 16:07:29.220638 125316462865536 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0421 16:07:29.220845 125232306193984 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save.
I0421 16:07:29.220963 125316462865536 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776787594.018175, 'wait_for_prev_duration_secs': 39.98574161529541, 'time_between_consecutive_saves_sec': 9.76187014579773, 'checkpointer_blocking_start_time': 1776787634.0041847, 'checkpointer_blocking_duration_secs': 15.21637511253357, 'get_old_steps_start_time': 1776787649.2205763, 'get_old_steps_duration_secs': 2.4318695068359375e-05, 'checkpoint_manager_blocking_start_time': 1776787594.0181437, 'checkpoint_manager_blocking_duration_secs': 55.20278573036194}
I0421 16:07:29.221120 125316462865536 checkpointing.py:408] Started an asynchronous checkpoint save for step 9
I0421 16:07:29.221157 125316462865536 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0421 16:07:30.010752 125232132130368 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints/9/items/array_metadatas/process_0
I0421 16:08:15.492574 125232195044928 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 46.272830s (commit=45.838335s, array_metadata_write=0.434496s)
I0421 16:08:15.493618 125233126180416 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 205.842 MiB/s (total gbytes: 12.3 GiB) (time elapsed: a minute) (per-host)
I0421 16:08:15.493717 125233126180416 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 46.273218s.
I0421 16:08:15.933425 125233126180416 array_metadata_store.py:367] [process=0][thread=async_save] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0.
I0421 16:08:16.429497 125233126180416 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.649558s. use_zarr3=False, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints/9/items
I0421 16:08:16.430260 125233126180416 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints/9/items
I0421 16:08:16.693329 125233126180416 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints/9
I0421 16:08:17.418373 125233126180416 atomicity.py:794] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints/9`.
I0421 16:08:17.418994 125233126180416 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 63.414798s. directory=gs://wanglance-maxtext/linen_ckpt_main_20260421_144657/linen_main_20260421_144657_16_zarr3_false/checkpoints/9
I0421 16:08:17.419089 125233126180416 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 48.198591s.
I0421 16:08:17.419262 125232306193984 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save.
I0421 16:08:17.419369 125232306193984 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save.
I0421 16:08:17.419422 125232306193984 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0421 16:08:17.419463 125232306193984 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0421 16:08:17.419630 125316462865536 checkpoint_manager.py:2006] [process=0][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0421 16:08:17.419765 125316462865536 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0421 16:08:17.420781 125316462865536 metric_logger.py:196] completed step: 9, seconds: 0.119, TFLOP/s/device: 113.751, Tokens/s/device: 17145.823, total_weights: 16384, loss: 4.189, lm_loss: 4.189, perplexity: 65.979
Per train step:
 Total TFLOPs: 13.59 
 split as 93.93% learnable weight flops and 6.07% attention flops

2026-04-22 19:04:08.091270: E external/local_xla/xla/stream_executor/cuda/cuda_fft.cc:467] Unable to register cuFFT factory: Attempting to register factory for plugin cuFFT when one has already been registered
WARNING: All log messages before absl::InitializeLog() is called are written to STDERR
E0000 00:00:1776884648.104318 2097094 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered
E0000 00:00:1776884648.108149 2097094 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered
W0000 00:00:1776884648.119617 2097094 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776884648.119631 2097094 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776884648.119632 2097094 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776884648.119635 2097094 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
Unrecognized keys in `rope_scaling` for 'rope_type'='yarn': {'rope_theta'}
`rope_scaling`'s factor field must be a float >= 1, got 40
`rope_scaling`'s beta_fast field must be a float, got 32
`rope_scaling`'s beta_slow field must be a float, got 1
Unrecognized keys in `rope_scaling` for 'rope_type'='yarn': {'rope_theta'}
Unrecognized keys in `rope_scaling` for 'rope_type'='yarn': {'rope_theta'}
Unrecognized keys in `rope_scaling` for 'rope_type'='yarn': {'rope_theta'}
2026-04-22 19:04:12.023844: 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 19:04:12.161754 137645457684288 max_utils.py:238] Skipping jax distributed system due to skip_jax_distributed_system=True flag.
I0422 19:04:43.400007 137645457684288 max_utils.py:800] System Information: Jax Version: 0.8.1
I0422 19:04:43.400138 137645457684288 max_utils.py:801] System Information: Jaxlib Version: 0.8.1
I0422 19:04:43.400172 137645457684288 max_utils.py:802] System Information: Jax Backend: PJRT C API
TFRT TPU v6 lite
Built on Nov 12 2025 14:16:36 (1762985796) cl/831091709
I0422 19:04:43.400203 137645457684288 train_utils.py:348] WARNING: 'dataset_path' might be pointing your local file system
I0422 19:04:43.400227 137645457684288 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0422 19:04:43.400318 137645457684288 train.py:705] [DECOUPLED NO-OP] skipping cloud diagnostics wrapper.
I0422 19:04:44.111483 137645457684288 maxtext_utils.py:1604] Num_devices: 8, shape (1, 1, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0422 19:04:44.111779 137645457684288 checkpointing.py:677] Setting up checkpoint logger...
I0422 19:04:44.111824 137645457684288 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=False
I0422 19:04:44.111861 137645457684288 pytree_checkpoint_handler.py:577] save_device_host_concurrent_bytes=None
I0422 19:04:44.112350 137645457684288 base_pytree_checkpoint_handler.py:411] Created BasePyTreeCheckpointHandler: use_ocdbt=True, use_zarr3=False, pytree_metadata_options=PyTreeMetadataOptions(support_rich_types=False), array_metadata_store=<orbax.checkpoint._src.metadata.array_metadata_store.Store object at 0x7d2fcd9b1a60>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0422 19:04:46.614853 137645457684288 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0422 19:04:46.615268 137645457684288 checkpoint_manager.py:702] [process=0][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d2df3f4d6a0>}, handler_registry=None
I0422 19:04:46.615516 137645457684288 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d2df3f4d6a0>` 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 19:04:46.615558 137645457684288 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d2df3f4dc10>` 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 19:04:46.615588 137645457684288 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 0x7d2df3f4d6a0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d2df3f4d6a0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d2df3f4dc10>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d2df3f4dc10>}).
I0422 19:04:46.615878 137645457684288 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.28
I0422 19:04:46.615936 137645457684288 async_checkpointer.py:177] [process=0][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>.<lambda> at 0x7d2df3f5c900> timeout: 600 secs and primary_host=0 for async checkpoint writes
I0422 19:04:46.748784 137645457684288 checkpoint_manager.py:1788] Found 0 checkpoint steps in gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints
I0422 19:04:46.749028 137645457684288 checkpoint_manager.py:921] [process=0][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_hns=False, enable_background_delete=False, read_only=False, enable_async_checkpointing=True, async_options=None, multiprocessing_options=MultiprocessingOptions(primary_host=0, active_processes=None, barrier_sync_key_prefix=None), should_save_fn=None, file_options=FileOptions(path_permission_mode=None), save_root_metadata=True, temporary_path_class=None, save_decision_policy=FixedIntervalPolicy(interval=5), preservation_policy=LatestN(n=None), prevent_write_metrics=False, enable_should_save_is_saving_in_progress_check=True, enable_per_process_directory_creation=False), root_directory=gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7d2df3f4cb30>
I0422 19:04:46.749332 137645457684288 checkpointing.py:301] Checkpoint manager created!
I0422 19:04:47.133584 137645457684288 nnx_wrappers.py:437] Unknown Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0422 19:04:47.133684 137645457684288 nnx_wrappers.py:437] Unknown Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None).
I0422 19:04:47.416341 137645457684288 attentions.py:1088] attentions/inputs_q Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0422 19:04:47.416438 137645457684288 attentions.py:1088] attentions/inputs_q Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None).
I0422 19:04:47.428781 137645457684288 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0422 19:04:47.428833 137645457684288 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None).
I0422 19:04:47.447997 137645457684288 attentions.py:1154] attentions/query Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0422 19:04:47.448074 137645457684288 attentions.py:1154] attentions/query Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None).
I0422 19:04:47.460509 137645457684288 attentions.py:1155] attentions/key Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0422 19:04:47.460562 137645457684288 attentions.py:1155] attentions/key Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None).
I0422 19:04:47.472883 137645457684288 attentions.py:1156] attentions/value Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0422 19:04:47.472932 137645457684288 attentions.py:1156] attentions/value Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None).
I0422 19:04:47.492358 137645457684288 attentions.py:1198] attentions/out Logical: bfloat16[8,2048,16,128]..................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0422 19:04:47.492419 137645457684288 attentions.py:1198] attentions/out Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None).
I0422 19:04:47.507894 137645457684288 linears.py:525] linears/x Logical: bfloat16[8,2048,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0422 19:04:47.507953 137645457684288 linears.py:525] linears/x Physical: bfloat16[8,2048,7168]....................................... ('fsdp', None, None).
I0422 19:04:47.659109 137645457684288 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0422 19:04:47.659211 137645457684288 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint.
[DECOUPLED NO-OP] gcs_storage: using stubs.
[DECOUPLED NO-OP] mldiagnostics: using stub.
[DECOUPLED NO-OP] mldiagnostics: using stub.
[DECOUPLED NO-OP] mldiagnostics: using stub.
[DECOUPLED NO-OP] workload_monitor: using stub.
[DECOUPLED NO-OP] vertex_tensorboard: using stub.
fsdp: 8
I0422 19:04:48.286445 137645457684288 maxtext_utils.py:1707]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   PartitionSpec('norm',)
    Physical:  (None,)
I0422 19:04:48.286557 137645457684288 maxtext_utils.py:1707]  params/params/decoder/layers/mlp/wi_0/kernel
    Shape:     float32[2048,16,7168]
    Logical:   PartitionSpec('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0422 19:04:48.286599 137645457684288 maxtext_utils.py:1707]  params/params/decoder/layers/mlp/wi_1/kernel
    Shape:     float32[2048,16,7168]
    Logical:   PartitionSpec('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0422 19:04:48.286643 137645457684288 maxtext_utils.py:1707]  params/params/decoder/layers/mlp/wo/kernel
    Shape:     float32[7168,16,2048]
    Logical:   PartitionSpec('mlp', 'layers', 'embed')
    Physical:  (None, None, 'fsdp')
I0422 19:04:48.286688 137645457684288 maxtext_utils.py:1707]  params/params/decoder/layers/post_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   PartitionSpec('norm', 'layers')
    Physical:  (None, None)
I0422 19:04:48.286717 137645457684288 maxtext_utils.py:1707]  params/params/decoder/layers/pre_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   PartitionSpec('norm', 'layers')
    Physical:  (None, None)
I0422 19:04:48.286758 137645457684288 maxtext_utils.py:1707]  params/params/decoder/layers/self_attention/key/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   PartitionSpec('embed', 'layers', 'kv_heads', 'kv_head_dim')
    Physical:  ('fsdp', None, None, None)
I0422 19:04:48.286807 137645457684288 maxtext_utils.py:1707]  params/params/decoder/layers/self_attention/out/kernel
    Shape:     float32[16,16,128,2048]
    Logical:   PartitionSpec('heads', 'layers', 'kv', 'embed')
    Physical:  (None, None, None, 'fsdp')
I0422 19:04:48.286836 137645457684288 maxtext_utils.py:1707]  params/params/decoder/layers/self_attention/query/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   PartitionSpec('embed', 'layers', 'q_heads', 'kv')
    Physical:  ('fsdp', None, None, None)
I0422 19:04:48.286862 137645457684288 maxtext_utils.py:1707]  params/params/decoder/layers/self_attention/value/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   PartitionSpec('embed', 'layers', 'kv_heads', 'kv_head_dim')
    Physical:  ('fsdp', None, None, None)
I0422 19:04:48.286898 137645457684288 maxtext_utils.py:1707]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   PartitionSpec('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)
I0422 19:04:48.286934 137645457684288 maxtext_utils.py:1707]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   PartitionSpec('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')

I0422 19:04:48.695559 137645457684288 train.py:155] train/xent Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length').
I0422 19:04:48.695653 137645457684288 train.py:155] train/xent Physical: float32[8,2048]............................................. ('fsdp', None).
I0422 19:04:48.707294 137645457684288 train.py:162] train/z_loss Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length').
I0422 19:04:48.707347 137645457684288 train.py:162] train/z_loss Physical: float32[8,2048]............................................. ('fsdp', None).
I0422 19:04:49.469005 137645457684288 max_utils.py:791] Total memory size: 3.6 GB, Output size: 1.5 GB, Temp size: 2.0 GB, Argument size: 1.5 GB, Host temp size: 0.0 GB.
I0422 19:04:49.469682 137645457684288 max_utils.py:194] tensorboardX not available; using no-op SummaryWriter.
I0422 19:04:49.469852 137645457684288 metric_logger.py:301] number parameters: 1.104 billion
I0422 19:04:51.798232 137645457684288 checkpointing.py:772] Waiting for step 0 to finish before checkpoint...
I0422 19:04:51.915779 137645457684288 checkpointing.py:776] Waited 0.11754798889160156 seconds for step 0 to finish before starting checkpointing.
I0422 19:04:51.916580 137645457684288 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0422 19:04:51.916772 137645457684288 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 0
I0422 19:04:51.917327 137645457684288 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints/0.
I0422 19:04:52.006654 137645457684288 signaling_client.py:373] Using ThreadSafeKeyValueSignalingClient
I0422 19:04:52.097394 137645457684288 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array.
I0422 19:04:52.097494 137645457684288 replica_slices.py:410] 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 19:04:52.104113 137614363461184 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints/0
I0422 19:04:52.864674 137614352975424 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints/0/items
I0422 19:04:53.033698 137614321518144 checkpoint.py:188] Wrote Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776884692767781160, 'commit_timestamp_nsecs': None, 'custom_metadata': {}}, json={"item_handlers": null, "metrics": {}, "performance_metrics": {}, "init_timestamp_nsecs": 1776884692767781160, "commit_timestamp_nsecs": null, "custom_metadata": {}} to gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints/0/_CHECKPOINT_METADATA
I0422 19:04:53.359626 2099189 google_auth_provider.cc:149] Using credentials at ~/.config/gcloud/application_default_credentials.json
I0422 19:04:53.359690 2099189 google_auth_provider.cc:156] Using OAuth2 AuthProvider
I0422 19:04:54.497938 137645457684288 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 2.401030s
I0422 19:04:54.498681 137645457684288 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 4.954 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 2 seconds) (per-host)
I0422 19:04:54.498739 137645457684288 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 2.490971s (batch_requests_ready=0.085114s, total_serialization_initiated=2.405242s, others=0.000615s)
I0422 19:04:54.498807 137645457684288 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 2.491601s (all_items=0.000024s, per_item={'items': '0.00002408'}, temp_paths=2.491576)
I0422 19:04:54.504033 137613723829824 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started.
I0422 19:04:54.504149 137645457684288 async_checkpointer.py:561] Finished blocking save. Time taken: 2.587333s. Continuing background save to gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints/0.
I0422 19:04:54.504356 137645457684288 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0422 19:04:54.504512 137614373946944 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save.
I0422 19:04:54.504576 137645457684288 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776884691.9165645, 'wait_for_prev_duration_secs': 4.4345855712890625e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776884691.9167943, 'checkpointer_blocking_duration_secs': 2.587480068206787, 'get_old_steps_start_time': 1776884694.504291, 'get_old_steps_duration_secs': 2.86102294921875e-05, 'checkpoint_manager_blocking_start_time': 1776884691.9164422, 'checkpoint_manager_blocking_duration_secs': 2.588108539581299}
I0422 19:04:54.504688 137645457684288 checkpointing.py:408] Started an asynchronous checkpoint save for step 0
I0422 19:04:54.504733 137645457684288 max_utils.py:750] 
Memstats: After params initialized:
I0422 19:04:54.504783 137645457684288 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_0(process=0,(0,0,0,0))
I0422 19:04:54.504807 137645457684288 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_1(process=0,(1,0,0,0))
I0422 19:04:54.504826 137645457684288 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_2(process=0,(0,1,0,0))
I0422 19:04:54.504845 137645457684288 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_3(process=0,(1,1,0,0))
I0422 19:04:54.504862 137645457684288 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_4(process=0,(0,2,0,0))
I0422 19:04:54.504878 137645457684288 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_5(process=0,(1,2,0,0))
I0422 19:04:54.504894 137645457684288 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_6(process=0,(0,3,0,0))
I0422 19:04:54.504910 137645457684288 max_utils.py:756] 	Using (GB) 1.59 / 31.25 (5.088000%) on TPU_7(process=0,(1,3,0,0))
I0422 19:04:54.756872 137645457684288 metric_logger.py:196] completed step: 0, seconds: 2.328, TFLOP/s/device: 5.837, Tokens/s/device: 879.839, total_weights: 16384, loss: 10.874, lm_loss: 10.874, perplexity: 52770.941
I0422 19:04:54.757775 137645457684288 metric_logger.py:281] To see full metrics 'tensorboard --logdir=gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/tensorboard/'
I0422 19:04:54.873935 137645457684288 metric_logger.py:196] completed step: 1, seconds: 2.957, TFLOP/s/device: 4.595, Tokens/s/device: 692.664, total_weights: 16384, loss: 10.874, lm_loss: 10.874, perplexity: 52770.941
I0422 19:04:54.993185 137645457684288 metric_logger.py:196] completed step: 2, seconds: 0.006, TFLOP/s/device: 2150.543, Tokens/s/device: 324153.213, total_weights: 16384, loss: 10.276, lm_loss: 10.276, perplexity: 29019.973
I0422 19:04:55.111531 137645457684288 metric_logger.py:196] completed step: 3, seconds: 0.118, TFLOP/s/device: 115.432, Tokens/s/device: 17399.135, total_weights: 16384, loss: 9.282, lm_loss: 9.282, perplexity: 10739.224
I0422 19:04:55.116981 137645457684288 checkpointing.py:772] Waiting for step 5 to finish before checkpoint...
I0422 19:04:55.296145 137614332003904 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints/0/items/array_metadatas/process_0
I0422 19:04:55.348650 137645457684288 checkpointing.py:776] Waited 0.23163199424743652 seconds for step 5 to finish before starting checkpointing.
I0422 19:04:55.349587 137645457684288 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0422 19:05:32.346814 137613734315584 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 37.843544s (commit=37.370568s, array_metadata_write=0.472977s)
I0422 19:05:32.348011 137613723829824 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 313.256 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 40 seconds) (per-host)
I0422 19:05:32.348145 137613723829824 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 37.843946s.
I0422 19:05:32.599481 137613723829824 checkpoint.py:228] Read Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776884692767781160, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} from gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints/0/_CHECKPOINT_METADATA
I0422 19:05:32.841723 137613723829824 array_metadata_store.py:367] [process=0][thread=async_save] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0.
I0422 19:05:33.047447 137614321518144 checkpoint.py:247] Updated Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776884692767781160, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} to gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints/0/_CHECKPOINT_METADATA
I0422 19:05:33.358096 137613723829824 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.707060s. use_zarr3=False, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints/0/items
I0422 19:05:33.358926 137613723829824 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints/0/items
I0422 19:05:33.620746 137613723829824 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints/0
I0422 19:05:34.354200 137613723829824 atomicity.py:794] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints/0`.
I0422 19:05:34.354938 137613723829824 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 42.438128s. directory=gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints/0
I0422 19:05:34.355035 137613723829824 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 39.850839s.
I0422 19:05:34.355174 137614373946944 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save.
I0422 19:05:34.355225 137614373946944 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save.
I0422 19:05:34.355285 137614373946944 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0422 19:05:34.355326 137614373946944 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0422 19:05:34.355498 137645457684288 checkpoint_manager.py:2006] [process=0][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0422 19:05:34.355637 137645457684288 checkpoint_manager.py:1441] Waiting for previous save to complete took 39.006053 seconds. If this number is high, consider checkpointing less frequently.
I0422 19:05:34.356410 137645457684288 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 5
I0422 19:05:34.356725 137645457684288 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints/5.
I0422 19:05:34.523953 137613723829824 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints/5
I0422 19:05:34.528551 137645457684288 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array.
I0422 19:05:34.528653 137645457684288 replica_slices.py:410] 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 19:05:35.275680 137614332003904 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints/5/items
I0422 19:05:36.580995 137645457684288 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 2.052898s
I0422 19:05:36.585029 137645457684288 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 5.754 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 2 seconds) (per-host)
I0422 19:05:36.585105 137645457684288 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 2.144832s (batch_requests_ready=0.084801s, total_serialization_initiated=2.056135s, others=0.003896s)
I0422 19:05:36.585208 137645457684288 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 2.145409s (all_items=0.000015s, per_item={'items': '0.00001502'}, temp_paths=2.145394)
I0422 19:05:36.586719 137613723829824 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started.
I0422 19:05:36.586808 137645457684288 async_checkpointer.py:561] Finished blocking save. Time taken: 2.230354s. Continuing background save to gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints/5.
I0422 19:05:36.586999 137645457684288 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=5] Starting CheckpointManager Save Finalize thread=save_finalize
I0422 19:05:36.587183 137614373946944 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save.
I0422 19:05:36.587303 137645457684288 standard_logger.py:34] {'step': 5, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776884695.3495631, 'wait_for_prev_duration_secs': 39.00605273246765, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776884734.356434, 'checkpointer_blocking_duration_secs': 2.230485677719116, 'get_old_steps_start_time': 1776884736.586934, 'get_old_steps_duration_secs': 2.7418136596679688e-05, 'checkpoint_manager_blocking_start_time': 1776884695.3494973, 'checkpoint_manager_blocking_duration_secs': 41.23778033256531}
I0422 19:05:36.587455 137645457684288 checkpointing.py:408] Started an asynchronous checkpoint save for step 5
I0422 19:05:36.588246 137645457684288 metric_logger.py:196] completed step: 4, seconds: 0.119, TFLOP/s/device: 113.741, Tokens/s/device: 17144.244, total_weights: 16384, loss: 8.327, lm_loss: 8.327, perplexity: 4134.812
I0422 19:05:36.596341 137645457684288 metric_logger.py:196] completed step: 5, seconds: 0.118, TFLOP/s/device: 114.755, Tokens/s/device: 17297.151, total_weights: 16384, loss: 7.367, lm_loss: 7.367, perplexity: 1583.522
I0422 19:05:36.712818 137645457684288 metric_logger.py:196] completed step: 6, seconds: 41.477, TFLOP/s/device: 0.328, Tokens/s/device: 49.377, total_weights: 16384, loss: 6.459, lm_loss: 6.459, perplexity: 638.363
I0422 19:05:36.831760 137645457684288 metric_logger.py:196] completed step: 7, seconds: 0.007, TFLOP/s/device: 2006.961, Tokens/s/device: 302511.078, total_weights: 16384, loss: 5.622, lm_loss: 5.622, perplexity: 276.577
I0422 19:05:36.950623 137645457684288 metric_logger.py:196] completed step: 8, seconds: 0.117, TFLOP/s/device: 115.890, Tokens/s/device: 17468.143, total_weights: 16384, loss: 4.864, lm_loss: 4.864, perplexity: 129.523
I0422 19:05:37.068896 137645457684288 checkpointing.py:772] Waiting for step 9 to finish before checkpoint...
I0422 19:05:37.069797 137645457684288 checkpointing.py:776] Waited 0.0009264945983886719 seconds for step 9 to finish before starting checkpointing.
I0422 19:05:37.070088 137645457684288 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=5][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0422 19:05:37.328901 137614172620352 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints/5/items/array_metadatas/process_0
I0422 19:06:08.617955 137614332003904 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 32.032097s (commit=31.553828s, array_metadata_write=0.478269s)
I0422 19:06:08.619078 137613723829824 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 369.726 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 34 seconds) (per-host)
I0422 19:06:08.619135 137613723829824 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 32.032283s.
I0422 19:06:09.158685 137613723829824 array_metadata_store.py:367] [process=0][thread=async_save] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0.
I0422 19:06:09.633755 137613723829824 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.652152s. use_zarr3=False, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints/5/items
I0422 19:06:09.634591 137613723829824 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints/5/items
I0422 19:06:09.875218 137613723829824 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints/5
I0422 19:06:10.609545 137613723829824 atomicity.py:794] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints/5`.
I0422 19:06:10.610275 137613723829824 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 36.253827s. directory=gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints/5
I0422 19:06:10.610349 137613723829824 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 34.023498s.
I0422 19:06:10.610534 137614373946944 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save.
I0422 19:06:10.610656 137614373946944 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save.
I0422 19:06:10.610727 137614373946944 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=5] CheckpointManager Save Finalize is syncing with other hosts...
I0422 19:06:10.610771 137614373946944 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=5] CheckpointManager Save Finalize is done on all hosts.
I0422 19:06:10.610905 137645457684288 checkpoint_manager.py:2006] [process=0][thread=MainThread][step=5][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=5.
W0422 19:06:10.611027 137645457684288 checkpoint_manager.py:1441] Waiting for previous save to complete took 33.540950 seconds. If this number is high, consider checkpointing less frequently.
I0422 19:06:10.611340 137645457684288 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 9
I0422 19:06:10.611635 137645457684288 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints/9.
I0422 19:06:10.787230 137613723829824 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints/9
I0422 19:06:10.787400 137645457684288 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array.
I0422 19:06:10.787632 137645457684288 replica_slices.py:410] 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 19:06:11.511601 137614172620352 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints/9/items
I0422 19:06:16.430148 137645457684288 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 5.643522s
I0422 19:06:16.430742 137645457684288 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.153 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 5 seconds) (per-host)
I0422 19:06:16.430793 137645457684288 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 5.731049s (batch_requests_ready=0.083831s, total_serialization_initiated=5.646777s, others=0.000441s)
I0422 19:06:16.430855 137645457684288 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 5.731538s (all_items=0.000011s, per_item={'items': '0.00001144'}, temp_paths=5.731526)
I0422 19:06:16.435546 137613723829824 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started.
I0422 19:06:16.435716 137645457684288 async_checkpointer.py:561] Finished blocking save. Time taken: 5.824335s. Continuing background save to gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints/9.
I0422 19:06:16.435843 137645457684288 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0422 19:06:16.436096 137614126483008 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save.
I0422 19:06:16.436216 137645457684288 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776884737.0700626, 'wait_for_prev_duration_secs': 33.54094982147217, 'time_between_consecutive_saves_sec': 2.714719533920288, 'checkpointer_blocking_start_time': 1776884770.6113636, 'checkpointer_blocking_duration_secs': 5.824412107467651, 'get_old_steps_start_time': 1776884776.4357927, 'get_old_steps_duration_secs': 1.71661376953125e-05, 'checkpoint_manager_blocking_start_time': 1776884737.070017, 'checkpoint_manager_blocking_duration_secs': 39.36617350578308}
I0422 19:06:16.436330 137645457684288 checkpointing.py:408] Started an asynchronous checkpoint save for step 9
I0422 19:06:16.436365 137645457684288 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0422 19:06:17.218766 137614162134592 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints/9/items/array_metadatas/process_0
I0422 19:06:55.903629 137614151648832 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 39.468646s (commit=38.996362s, array_metadata_write=0.472283s)
I0422 19:06:55.904755 137613723829824 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 279.544 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 45 seconds) (per-host)
I0422 19:06:55.904881 137613723829824 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 39.469246s.
I0422 19:06:56.402624 137613723829824 array_metadata_store.py:367] [process=0][thread=async_save] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0.
I0422 19:06:56.958653 137613723829824 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.728305s. use_zarr3=False, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints/9/items
I0422 19:06:56.959494 137613723829824 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints/9/items
I0422 19:06:57.213317 137613723829824 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints/9
I0422 19:06:57.922567 137613723829824 atomicity.py:794] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints/9`.
I0422 19:06:57.923310 137613723829824 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 47.311935s. directory=gs://wanglance-maxtext/linen_ckpt_main_20260422_174509/linen_main_20260422_174509_16_zarr3_false/checkpoints/9
I0422 19:06:57.923376 137613723829824 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 41.487742s.
I0422 19:06:57.923532 137614126483008 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save.
I0422 19:06:57.923653 137614126483008 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save.
I0422 19:06:57.923703 137614126483008 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0422 19:06:57.923745 137614126483008 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0422 19:06:57.923914 137645457684288 checkpoint_manager.py:2006] [process=0][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0422 19:06:57.924070 137645457684288 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0422 19:06:57.925016 137645457684288 metric_logger.py:196] completed step: 9, seconds: 0.119, TFLOP/s/device: 114.056, Tokens/s/device: 17191.737, total_weights: 16384, loss: 4.189, lm_loss: 4.189, perplexity: 65.979
Per train step:
 Total TFLOPs: 13.59 
 split as 93.93% learnable weight flops and 6.07% attention flops