XPK Start: Wed Apr 22 15:54:37 UTC 2026
2026-04-22 15:54:41.898493: 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 00:00:1776873281.911337 10 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered
E0000 00:00:1776873281.915030 10 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered
W0000 00:00:1776873281.926241 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776873281.926260 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776873281.926262 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776873281.926264 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
2026-04-22 15:55:16.400022: 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 15:55:16.923345 135166776719168 max_utils.py:273] Attempting to initialize the jax distributed system...
INFO:2026-04-22 15:55:25,965:jax._src.distributed:140: Starting JAX distributed service on [::]:8482
I0422 15:55:25.965564 135166776719168 distributed.py:140] Starting JAX distributed service on [::]:8482
INFO:2026-04-22 15:55:25,968:jax._src.distributed:157: Connecting to JAX distributed service on mt-03-dropout-35co5-slice-job-0-0.mt-03-dropout-35co5:8482
I0422 15:55:25.968151 135166776719168 distributed.py:157] Connecting to JAX distributed service on mt-03-dropout-35co5-slice-job-0-0.mt-03-dropout-35co5:8482
I0422 15:55:27.844243 135166776719168 max_utils.py:284] Jax distributed system initialized!
I0422 15:55:34.908928 135166776719168 max_utils.py:800] System Information: Jax Version: 0.8.1
I0422 15:55:34.909034 135166776719168 max_utils.py:801] System Information: Jaxlib Version: 0.8.1
I0422 15:55:34.909075 135166776719168 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 15:55:34.909109 135166776719168 train_utils.py:377] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0422 15:55:35.522435 135166776719168 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0422 15:55:35.523038 135166776719168 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0422 15:55:35.523222 135166776719168 checkpointing.py:688] Setting up checkpoint logger...
I0422 15:55:35.523272 135166776719168 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True
I0422 15:55:35.523323 135166776719168 pytree_checkpoint_handler.py:589] save_device_host_concurrent_bytes=None
I0422 15:55:35.523685 135166776719168 base_pytree_checkpoint_handler.py:415] 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 0x7aee64553830>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0422 15:55:38.590826 135166776719168 checkpointing.py:266] Enabling policy for fixed interval checkpointing.
I0422 15:55:38.591167 135166776719168 checkpoint_manager.py:709] [process=5][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ad9b40b5e50>}, handler_registry=None
I0422 15:55:38.591408 135166776719168 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ad9b40b5e50>` 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 15:55:38.591457 135166776719168 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7aed327cc500>` 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 15:55:38.591492 135166776719168 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 0x7ad9b40b5e50>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ad9b40b5e50>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7aed327cc500>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7aed327cc500>}).
I0422 15:55:38.592008 135166776719168 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.33
I0422 15:55:38.592086 135166776719168 async_checkpointer.py:177] [process=5][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7ad93c760180> timeout: 600 secs and primary_host=0 for async checkpoint writes
I0422 15:55:40.172848 135166776719168 checkpoint_manager.py:1818] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260422_154647/linen_xpk_feat_nnx_set_defaults_true_20260422_154647_03_dropout/checkpoints
I0422 15:55:40.205024 135166776719168 checkpoint_manager.py:929] [process=5][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_set_defaults_true_20260422_154647/linen_xpk_feat_nnx_set_defaults_true_20260422_154647_03_dropout/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7ad9b44a38f0>
I0422 15:55:40.205156 135166776719168 checkpointing.py:302] Checkpoint manager created!
I0422 15:55:40.519065 135166776719168 nnx_wrappers.py:455] Unknown Logical: bfloat16[32,128,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0422 15:55:40.519170 135166776719168 nnx_wrappers.py:455] Unknown Physical: bfloat16[32,128,2048]....................................... ('fsdp', None, None).
I0422 15:55:40.890902 135166776719168 attentions.py:1084] attentions/inputs_q Logical: bfloat16[32,128,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0422 15:55:40.890994 135166776719168 attentions.py:1084] attentions/inputs_q Physical: bfloat16[32,128,2048]....................................... ('fsdp', None, None).
I0422 15:55:40.906942 135166776719168 attentions.py:1085] attentions/inputs_kv Logical: bfloat16[32,128,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0422 15:55:40.907003 135166776719168 attentions.py:1085] attentions/inputs_kv Physical: bfloat16[32,128,2048]....................................... ('fsdp', None, None).
I0422 15:55:40.929751 135166776719168 attentions.py:1150] attentions/query Logical: bfloat16[32,128,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0422 15:55:40.929826 135166776719168 attentions.py:1150] attentions/query Physical: bfloat16[32,128,16,128]..................................... ('fsdp', None, None, None).
I0422 15:55:40.945747 135166776719168 attentions.py:1151] attentions/key Logical: bfloat16[32,128,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0422 15:55:40.945807 135166776719168 attentions.py:1151] attentions/key Physical: bfloat16[32,128,16,128]..................................... ('fsdp', None, None, None).
I0422 15:55:40.961671 135166776719168 attentions.py:1152] attentions/value Logical: bfloat16[32,128,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0422 15:55:40.961727 135166776719168 attentions.py:1152] attentions/value Physical: bfloat16[32,128,16,128]..................................... ('fsdp', None, None, None).
I0422 15:55:40.986331 135166776719168 attentions.py:1193] attentions/out Logical: bfloat16[32,128,16,128]..................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0422 15:55:40.986397 135166776719168 attentions.py:1193] attentions/out Physical: bfloat16[32,128,16,128]..................................... ('fsdp', None, None, None).
I0422 15:55:41.012077 135166776719168 linears.py:541] linears/x Logical: bfloat16[32,128,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0422 15:55:41.012153 135166776719168 linears.py:541] linears/x Physical: bfloat16[32,128,7168]....................................... ('fsdp', None, None).
I0422 15:55:41.218458 135166776719168 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint
I0422 15:55:41.218567 135166776719168 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0422 15:55:42.665132 135166776719168 maxtext_utils.py:1740] params/params/decoder/decoder_norm/scale
Shape: float32[2048]
Logical: PartitionSpec('norm',)
Physical: (None,)
I0422 15:55:42.665261 135166776719168 maxtext_utils.py:1740] params/params/decoder/layers/mlp/wi_0/kernel
Shape: float32[2048,16,7168]
Logical: PartitionSpec('embed', 'layers', 'mlp')
Physical: ('fsdp', None, None)
I0422 15:55:42.665317 135166776719168 maxtext_utils.py:1740] params/params/decoder/layers/mlp/wi_1/kernel
Shape: float32[2048,16,7168]
Logical: PartitionSpec('embed', 'layers', 'mlp')
Physical: ('fsdp', None, None)
I0422 15:55:42.665375 135166776719168 maxtext_utils.py:1740] params/params/decoder/layers/mlp/wo/kernel
Shape: float32[7168,16,2048]
Logical: PartitionSpec('mlp', 'layers', 'embed')
Physical: (None, None, 'fsdp')
I0422 15:55:42.665427 135166776719168 maxtext_utils.py:1740] params/params/decoder/layers/post_self_attention_layer_norm/scale
Shape: float32[2048,16]
Logical: PartitionSpec('norm', 'layers')
Physical: (None, None)
I0422 15:55:42.665466 135166776719168 maxtext_utils.py:1740] params/params/decoder/layers/pre_self_attention_layer_norm/scale
Shape: float32[2048,16]
Logical: PartitionSpec('norm', 'layers')
Physical: (None, None)
I0422 15:55:42.665519 135166776719168 maxtext_utils.py:1740] 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 15:55:42.665571 135166776719168 maxtext_utils.py:1740] 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 15:55:42.665611 135166776719168 maxtext_utils.py:1740] 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 15:55:42.665661 135166776719168 maxtext_utils.py:1740] 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 15:55:42.665729 135166776719168 maxtext_utils.py:1740] params/params/decoder/logits_dense/kernel
Shape: float32[2048,32000]
Logical: PartitionSpec('embed', 'vocab')
Physical: ('fsdp', None)
I0422 15:55:42.665782 135166776719168 maxtext_utils.py:1740] params/params/token_embedder/embedding
Shape: float32[32000,2048]
Logical: PartitionSpec('vocab', 'embed')
Physical: (None, 'fsdp')
I0422 15:55:43.192766 135166776719168 train.py:158] train/xent Logical: float32[32,128]............................................. ('activation_embed_and_logits_batch', 'activation_length').
I0422 15:55:43.192858 135166776719168 train.py:158] train/xent Physical: float32[32,128]............................................. ('fsdp', None).
I0422 15:55:43.207619 135166776719168 train.py:165] train/z_loss Logical: float32[32,128]............................................. ('activation_embed_and_logits_batch', 'activation_length').
I0422 15:55:43.207689 135166776719168 train.py:165] train/z_loss Physical: float32[32,128]............................................. ('fsdp', None).
I0422 15:55:46.628247 135166776719168 max_utils.py:791] Total memory size: 0.8 GB, Output size: 0.4 GB, Temp size: 0.4 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB.
I0422 15:55:46.629097 135166776719168 metric_logger.py:289] number parameters: 1.104 billion
I0422 15:55:50.484800 135166776719168 checkpointing.py:794] Waiting for step 0 to finish before checkpoint...
I0422 15:55:50.801251 135166776719168 checkpointing.py:798] Waited 0.31643009185791016 seconds for step 0 to finish before starting checkpointing.
I0422 15:55:50.803962 135166776719168 checkpoint_manager.py:2013] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0422 15:55:50.805785 135166776719168 checkpoint_manager.py:1518] [process=5] Saving checkpoint at step 0
I0422 15:55:50.808532 135166776719168 async_checkpointer.py:452] [process=5] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260422_154647/linen_xpk_feat_nnx_set_defaults_true_20260422_154647_03_dropout/checkpoints/0.
I0422 15:55:51.853190 135166776719168 signaling_client.py:364] Using JaxDistributedSignalingClient
I0422 15:55:51.854409 135166776719168 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array.
I0422 15:55:51.854468 135166776719168 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0422 15:55:52.096156 135166776719168 base_pytree_checkpoint_handler.py:153] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.243042s
I0422 15:55:52.096335 135166776719168 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.951 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.5227904319763184 s) (per-host)
I0422 15:55:52.096389 135166776719168 base_pytree_checkpoint_handler.py:737] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.522854s (batch_requests_ready=0.275881s, total_serialization_initiated=0.246901s, others=0.000072s)
I0422 15:55:52.096480 135166776719168 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.527047s (all_items=0.000021s, per_item={'items': '0.00002122'}, temp_paths=0.527025)
I0422 15:55:52.097398 135043485783808 async_checkpointer.py:79] [process=5][thread=async_save] Background save thread started.
I0422 15:55:52.097569 135166776719168 async_checkpointer.py:561] Finished blocking save. Time taken: 1.291713s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260422_154647/linen_xpk_feat_nnx_set_defaults_true_20260422_154647_03_dropout/checkpoints/0.
I0422 15:55:52.536471 135166776719168 checkpoint_manager.py:1566] [process=5][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0422 15:55:52.536883 135038637160192 async_checkpointer.py:265] [process=5][thread=save_finalize] Waiting for background save thread=async_save.
I0422 15:55:52.537024 135166776719168 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260422_154647/linen_xpk_feat_nnx_set_defaults_true_20260422_154647_03_dropout/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776873350.803945, 'wait_for_prev_duration_secs': 6.437301635742188e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776873350.805823, 'checkpointer_blocking_duration_secs': 1.2918658256530762, 'get_old_steps_start_time': 1776873352.097712, 'get_old_steps_duration_secs': 2.5033950805664062e-05, 'checkpoint_manager_blocking_start_time': 1776873350.8018594, 'checkpoint_manager_blocking_duration_secs': 1.735124111175537}
I0422 15:55:52.537176 135166776719168 checkpointing.py:409] Started an asynchronous checkpoint save for step 0
I0422 15:55:52.537230 135166776719168 max_utils.py:750]
Memstats: After params initialized:
I0422 15:55:52.537292 135166776719168 max_utils.py:756] Using (GB) 0.41 / 31.25 (1.312000%) on TPU_18(process=5,(2,4,0,0))
I0422 15:55:52.537328 135166776719168 max_utils.py:756] Using (GB) 0.41 / 31.25 (1.312000%) on TPU_19(process=5,(3,4,0,0))
I0422 15:55:52.537357 135166776719168 max_utils.py:756] Using (GB) 0.41 / 31.25 (1.312000%) on TPU_22(process=5,(2,5,0,0))
I0422 15:55:52.537387 135166776719168 max_utils.py:756] Using (GB) 0.41 / 31.25 (1.312000%) on TPU_23(process=5,(3,5,0,0))
I0422 15:55:52.805330 135166776719168 metric_logger.py:185] completed step: 0, seconds: 3.856, TFLOP/s/device: 0.208, Tokens/s/device: 33.199, total_weights: 4096, loss: 10.889
I0422 15:55:52.892678 135166776719168 metric_logger.py:185] completed step: 1, seconds: 2.319, TFLOP/s/device: 0.345, Tokens/s/device: 55.190, total_weights: 4096, loss: 10.902
I0422 15:55:53.313973 135166776719168 metric_logger.py:185] completed step: 2, seconds: 0.017, TFLOP/s/device: 46.769, Tokens/s/device: 7474.889, total_weights: 4096, loss: 9.956
I0422 15:55:53.385993 135166776719168 metric_logger.py:185] completed step: 3, seconds: 0.422, TFLOP/s/device: 1.897, Tokens/s/device: 303.165, total_weights: 4096, loss: 9.139
I0422 15:55:53.527847 135166776719168 metric_logger.py:185] completed step: 4, seconds: 0.075, TFLOP/s/device: 10.628, Tokens/s/device: 1698.581, total_weights: 4096, loss: 8.458
I0422 15:55:53.533556 135166776719168 metric_logger.py:185] completed step: 5, seconds: 0.072, TFLOP/s/device: 11.151, Tokens/s/device: 1782.258, total_weights: 4096, loss: 7.924
I0422 15:56:02.751638 135166776719168 metric_logger.py:185] completed step: 6, seconds: 0.142, TFLOP/s/device: 5.630, Tokens/s/device: 899.793, total_weights: 4096, loss: 7.553
I0422 15:56:02.822618 135166776719168 metric_logger.py:185] completed step: 7, seconds: 9.149, TFLOP/s/device: 0.088, Tokens/s/device: 13.991, total_weights: 4096, loss: 7.267
I0422 15:56:02.893340 135166776719168 metric_logger.py:185] completed step: 8, seconds: 0.075, TFLOP/s/device: 10.738, Tokens/s/device: 1716.209, total_weights: 4096, loss: 7.111
I0422 15:56:02.964833 135166776719168 checkpointing.py:794] Waiting for step 9 to finish before checkpoint...
I0422 15:56:02.965427 135166776719168 checkpointing.py:798] Waited 0.0006079673767089844 seconds for step 9 to finish before starting checkpointing.
I0422 15:56:02.967410 135166776719168 checkpoint_manager.py:2024] [process=5][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0422 15:56:04.418928 2645 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0422 15:56:06.579352 135043494176512 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260422_154647/linen_xpk_feat_nnx_set_defaults_true_20260422_154647_03_dropout/checkpoints/0/items/array_metadatas/process_5
I0422 15:56:33.549414 135043485783808 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/gbytes_per_sec: 37.631 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.97582721710205 s) (per-host)
I0422 15:56:33.549535 135043485783808 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.452024s.
I0422 15:56:41.945847 135043485783808 async_checkpointer.py:144] [process=5][thread=async_save] Background save thread done. Time taken: 49.848322s.
I0422 15:56:41.946129 135038637160192 async_checkpointer.py:273] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save.
I0422 15:56:41.946252 135038637160192 async_checkpointer.py:283] [process=5][thread=save_finalize] No errors found in background save thread=async_save.
I0422 15:56:41.946305 135038637160192 checkpoint_manager.py:2133] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0422 15:56:41.948007 135038637160192 checkpoint_manager.py:2142] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0422 15:56:41.948183 135166776719168 checkpoint_manager.py:2036] [process=5][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0422 15:56:41.948324 135166776719168 checkpoint_manager.py:1458] Waiting for previous save to complete took 38.980919 seconds. If this number is high, consider checkpointing less frequently.
I0422 15:56:41.950217 135166776719168 checkpoint_manager.py:1518] [process=5] Saving checkpoint at step 9
I0422 15:56:41.953620 135166776719168 async_checkpointer.py:452] [process=5] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260422_154647/linen_xpk_feat_nnx_set_defaults_true_20260422_154647_03_dropout/checkpoints/9.
I0422 15:56:42.954837 135166776719168 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array.
I0422 15:56:42.954943 135166776719168 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0422 15:56:42.997473 135166776719168 base_pytree_checkpoint_handler.py:153] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.043606s
I0422 15:56:42.997632 135166776719168 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/blocking_gbytes_per_sec: 4.723 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.32657861709594727 s) (per-host)
I0422 15:56:42.997696 135166776719168 base_pytree_checkpoint_handler.py:737] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.326652s (batch_requests_ready=0.281109s, total_serialization_initiated=0.045462s, others=0.000081s)
I0422 15:56:42.997787 135166776719168 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.330836s (all_items=0.000017s, per_item={'items': '0.00001693'}, temp_paths=0.330819)
I0422 15:56:42.998698 135043494176512 async_checkpointer.py:79] [process=5][thread=async_save] Background save thread started.
I0422 15:56:42.998858 135166776719168 async_checkpointer.py:561] Finished blocking save. Time taken: 1.048562s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260422_154647/linen_xpk_feat_nnx_set_defaults_true_20260422_154647_03_dropout/checkpoints/9.
I0422 15:56:43.414243 135166776719168 checkpoint_manager.py:1566] [process=5][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0422 15:56:43.414621 135038637160192 async_checkpointer.py:265] [process=5][thread=save_finalize] Waiting for background save thread=async_save.
I0422 15:56:43.414817 135166776719168 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260422_154647/linen_xpk_feat_nnx_set_defaults_true_20260422_154647_03_dropout/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776873362.9673803, 'wait_for_prev_duration_secs': 38.980918645858765, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776873401.9502628, 'checkpointer_blocking_duration_secs': 1.0487041473388672, 'get_old_steps_start_time': 1776873402.9989877, 'get_old_steps_duration_secs': 2.5510787963867188e-05, 'checkpoint_manager_blocking_start_time': 1776873362.9656668, 'checkpoint_manager_blocking_duration_secs': 40.449110984802246}
I0422 15:56:43.414925 135166776719168 checkpointing.py:409] Started an asynchronous checkpoint save for step 9
I0422 15:56:43.414980 135166776719168 checkpoint_manager.py:2024] [process=5][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0422 15:56:49.607990 135014456928000 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260422_154647/linen_xpk_feat_nnx_set_defaults_true_20260422_154647_03_dropout/checkpoints/9/items/array_metadatas/process_5
I0422 15:57:24.440784 135043494176512 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/gbytes_per_sec: 37.817 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.76968741416931 s) (per-host)
I0422 15:57:24.440908 135043494176512 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.442098s.
I0422 15:57:33.445502 135043494176512 async_checkpointer.py:144] [process=5][thread=async_save] Background save thread done. Time taken: 50.446676s.
I0422 15:57:33.445833 135038637160192 async_checkpointer.py:273] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save.
I0422 15:57:33.445957 135038637160192 async_checkpointer.py:283] [process=5][thread=save_finalize] No errors found in background save thread=async_save.
I0422 15:57:33.446007 135038637160192 checkpoint_manager.py:2133] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0422 15:57:33.447718 135038637160192 checkpoint_manager.py:2142] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0422 15:57:33.447893 135166776719168 checkpoint_manager.py:2036] [process=5][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0422 15:57:33.448039 135166776719168 checkpoint_manager.py:2013] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0422 15:57:33.448660 135166776719168 metric_logger.py:185] completed step: 9, seconds: 0.071, TFLOP/s/device: 11.278, Tokens/s/device: 1802.512, total_weights: 4096, loss: 6.981
Per train step:
Total TFLOPs: 0.80
split as 99.60% learnable weight flops and 0.40% attention flops
XPK End: Wed Apr 22 15:57:43 UTC 2026
EXIT_CODE=0