XPK Start: Thu Apr 23 16:00:44 UTC 2026
2026-04-23 16:00:48.151177: 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 00:00:1776960048.164236 10 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered
E0000 00:00:1776960048.167996 10 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered
W0000 00:00:1776960048.179652 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776960048.179670 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776960048.179673 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776960048.179675 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
2026-04-23 16:01:15.177881: 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)
I0423 16:01:15.714601 134159164888896 max_utils.py:273] Attempting to initialize the jax distributed system...
INFO:2026-04-23 16:01:24,756:jax._src.distributed:140: Starting JAX distributed service on [::]:8482
I0423 16:01:24.756212 134159164888896 distributed.py:140] Starting JAX distributed service on [::]:8482
INFO:2026-04-23 16:01:24,758:jax._src.distributed:157: Connecting to JAX distributed service on mt-03-dropout-y5zxo-slice-job-0-0.mt-03-dropout-y5zxo:8482
I0423 16:01:24.758472 134159164888896 distributed.py:157] Connecting to JAX distributed service on mt-03-dropout-y5zxo-slice-job-0-0.mt-03-dropout-y5zxo:8482
I0423 16:01:31.039340 134159164888896 max_utils.py:284] Jax distributed system initialized!
I0423 16:01:37.869545 134159164888896 max_utils.py:800] System Information: Jax Version: 0.8.1
I0423 16:01:37.869652 134159164888896 max_utils.py:801] System Information: Jaxlib Version: 0.8.1
I0423 16:01:37.869692 134159164888896 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
I0423 16:01:37.869726 134159164888896 train_utils.py:377] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0423 16:01:38.485926 134159164888896 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0423 16:01:38.486544 134159164888896 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0423 16:01:38.486732 134159164888896 checkpointing.py:688] Setting up checkpoint logger...
I0423 16:01:38.486784 134159164888896 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True
I0423 16:01:38.486828 134159164888896 pytree_checkpoint_handler.py:589] save_device_host_concurrent_bytes=None
I0423 16:01:38.487197 134159164888896 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 0x7a03cc7795b0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0423 16:01:41.467990 134159164888896 checkpointing.py:266] Enabling policy for fixed interval checkpointing.
I0423 16:01:41.468259 134159164888896 checkpoint_manager.py:709] [process=6][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7a02981d7b60>}, handler_registry=None
I0423 16:01:41.468534 134159164888896 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7a02981d7b60>` 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`.
I0423 16:01:41.468588 134159164888896 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x79f15fd62e10>` 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`.
I0423 16:01:41.468633 134159164888896 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 0x7a02981d7b60>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7a02981d7b60>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x79f15fd62e10>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x79f15fd62e10>}).
I0423 16:01:41.469283 134159164888896 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.33
I0423 16:01:41.469385 134159164888896 async_checkpointer.py:177] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x79f15e934180> timeout: 600 secs and primary_host=0 for async checkpoint writes
I0423 16:01:42.608809 134159164888896 checkpoint_manager.py:1818] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_03_dropout/checkpoints
I0423 16:01:42.995692 134159164888896 checkpoint_manager.py:929] [process=6][thread=MainThread] CheckpointManager created, primary_host=0, CheckpointManagerOptions=CheckpointManagerOptions(save_interval_steps=1, max_to_keep=None, keep_time_interval=None, keep_period=None, should_keep_fn=None, best_fn=None, best_mode='max', keep_checkpoints_without_metrics=True, step_prefix=None, step_format_fixed_length=None, step_name_format=None, create=True, cleanup_tmp_directories=False, save_on_steps=frozenset(), single_host_load_and_broadcast=False, todelete_subdir=None, todelete_full_path=None, enable_background_delete=False, read_only=False, enable_async_checkpointing=True, async_options=None, multiprocessing_options=MultiprocessingOptions(primary_host=0, active_processes=None, barrier_sync_key_prefix=None), should_save_fn=None, file_options=FileOptions(path_permission_mode=None), save_root_metadata=True, temporary_path_class=None, save_decision_policy=FixedIntervalPolicy(interval=10), preservation_policy=LatestN(n=None), prevent_write_metrics=False, enable_should_save_is_saving_in_progress_check=True, enable_per_process_directory_creation=False, lightweight_initialize=False), root_directory=gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_03_dropout/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7a0284090da0>
I0423 16:01:42.995865 134159164888896 checkpointing.py:302] Checkpoint manager created!
I0423 16:01:43.313405 134159164888896 nnx_wrappers.py:455] Unknown Logical: bfloat16[32,128,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0423 16:01:43.313519 134159164888896 nnx_wrappers.py:455] Unknown Physical: bfloat16[32,128,2048]....................................... ('fsdp', None, None).
I0423 16:01:43.686253 134159164888896 attentions.py:1084] attentions/inputs_q Logical: bfloat16[32,128,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0423 16:01:43.686355 134159164888896 attentions.py:1084] attentions/inputs_q Physical: bfloat16[32,128,2048]....................................... ('fsdp', None, None).
I0423 16:01:43.702576 134159164888896 attentions.py:1085] attentions/inputs_kv Logical: bfloat16[32,128,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0423 16:01:43.702636 134159164888896 attentions.py:1085] attentions/inputs_kv Physical: bfloat16[32,128,2048]....................................... ('fsdp', None, None).
I0423 16:01:43.726016 134159164888896 attentions.py:1150] attentions/query Logical: bfloat16[32,128,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0423 16:01:43.726089 134159164888896 attentions.py:1150] attentions/query Physical: bfloat16[32,128,16,128]..................................... ('fsdp', None, None, None).
I0423 16:01:43.742472 134159164888896 attentions.py:1151] attentions/key Logical: bfloat16[32,128,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0423 16:01:43.742535 134159164888896 attentions.py:1151] attentions/key Physical: bfloat16[32,128,16,128]..................................... ('fsdp', None, None, None).
I0423 16:01:43.758687 134159164888896 attentions.py:1152] attentions/value Logical: bfloat16[32,128,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0423 16:01:43.758750 134159164888896 attentions.py:1152] attentions/value Physical: bfloat16[32,128,16,128]..................................... ('fsdp', None, None, None).
I0423 16:01:43.784126 134159164888896 attentions.py:1193] attentions/out Logical: bfloat16[32,128,16,128]..................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0423 16:01:43.784201 134159164888896 attentions.py:1193] attentions/out Physical: bfloat16[32,128,16,128]..................................... ('fsdp', None, None, None).
I0423 16:01:43.810584 134159164888896 linears.py:541] linears/x Logical: bfloat16[32,128,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0423 16:01:43.810654 134159164888896 linears.py:541] linears/x Physical: bfloat16[32,128,7168]....................................... ('fsdp', None, None).
I0423 16:01:44.012829 134159164888896 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint
I0423 16:01:44.012955 134159164888896 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0423 16:01:45.472268 134159164888896 maxtext_utils.py:1740] params/params/decoder/decoder_norm/scale
Shape: float32[2048]
Logical: PartitionSpec('norm',)
Physical: (None,)
I0423 16:01:45.472421 134159164888896 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)
I0423 16:01:45.472477 134159164888896 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)
I0423 16:01:45.472539 134159164888896 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')
I0423 16:01:45.472595 134159164888896 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)
I0423 16:01:45.472637 134159164888896 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)
I0423 16:01:45.472694 134159164888896 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)
I0423 16:01:45.472749 134159164888896 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')
I0423 16:01:45.472793 134159164888896 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)
I0423 16:01:45.472832 134159164888896 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)
I0423 16:01:45.472882 134159164888896 maxtext_utils.py:1740] params/params/decoder/logits_dense/kernel
Shape: float32[2048,32000]
Logical: PartitionSpec('embed', 'vocab')
Physical: ('fsdp', None)
I0423 16:01:45.472932 134159164888896 maxtext_utils.py:1740] params/params/token_embedder/embedding
Shape: float32[32000,2048]
Logical: PartitionSpec('vocab', 'embed')
Physical: (None, 'fsdp')
I0423 16:01:46.005550 134159164888896 train.py:158] train/xent Logical: float32[32,128]............................................. ('activation_embed_and_logits_batch', 'activation_length').
I0423 16:01:46.005651 134159164888896 train.py:158] train/xent Physical: float32[32,128]............................................. ('fsdp', None).
I0423 16:01:46.020658 134159164888896 train.py:165] train/z_loss Logical: float32[32,128]............................................. ('activation_embed_and_logits_batch', 'activation_length').
I0423 16:01:46.020719 134159164888896 train.py:165] train/z_loss Physical: float32[32,128]............................................. ('fsdp', None).
I0423 16:01:49.296836 134159164888896 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.
I0423 16:01:49.297742 134159164888896 metric_logger.py:289] number parameters: 1.104 billion
I0423 16:01:53.327226 134159164888896 checkpointing.py:794] Waiting for step 0 to finish before checkpoint...
I0423 16:01:53.557003 134159164888896 checkpointing.py:798] Waited 0.22976255416870117 seconds for step 0 to finish before starting checkpointing.
I0423 16:01:53.560582 134159164888896 checkpoint_manager.py:2013] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0423 16:01:53.562588 134159164888896 checkpoint_manager.py:1518] [process=6] Saving checkpoint at step 0
I0423 16:01:53.565351 134159164888896 async_checkpointer.py:452] [process=6] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_03_dropout/checkpoints/0.
I0423 16:01:54.322071 134159164888896 signaling_client.py:364] Using JaxDistributedSignalingClient
I0423 16:01:54.323262 134159164888896 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array.
I0423 16:01:54.323324 134159164888896 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
I0423 16:01:54.570469 134159164888896 base_pytree_checkpoint_handler.py:153] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.248480s
I0423 16:01:54.570645 134159164888896 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.139 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.721306562423706 s) (per-host)
I0423 16:01:54.570700 134159164888896 base_pytree_checkpoint_handler.py:737] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.721372s (batch_requests_ready=0.468881s, total_serialization_initiated=0.252417s, others=0.000073s)
I0423 16:01:54.570789 134159164888896 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.725496s (all_items=0.000021s, per_item={'items': '0.00002074'}, temp_paths=0.725475)
I0423 16:01:54.571824 134040988395264 async_checkpointer.py:79] [process=6][thread=async_save] Background save thread started.
I0423 16:01:54.572001 134159164888896 async_checkpointer.py:561] Finished blocking save. Time taken: 1.009341s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_03_dropout/checkpoints/0.
I0423 16:01:54.573919 134159164888896 checkpoint_manager.py:1566] [process=6][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0423 16:01:54.574168 134035099600640 async_checkpointer.py:265] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0423 16:01:54.574295 134159164888896 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_03_dropout/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776960113.5605643, 'wait_for_prev_duration_secs': 6.604194641113281e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776960113.5626268, 'checkpointer_blocking_duration_secs': 1.0094990730285645, 'get_old_steps_start_time': 1776960114.5721462, 'get_old_steps_duration_secs': 2.6702880859375e-05, 'checkpoint_manager_blocking_start_time': 1776960113.5576005, 'checkpoint_manager_blocking_duration_secs': 1.0166583061218262}
I0423 16:01:54.574395 134159164888896 checkpointing.py:409] Started an asynchronous checkpoint save for step 0
I0423 16:01:54.574444 134159164888896 max_utils.py:750]
Memstats: After params initialized:
I0423 16:01:54.574490 134159164888896 max_utils.py:756] Using (GB) 0.41 / 31.25 (1.312000%) on TPU_24(process=6,(0,6,0,0))
I0423 16:01:54.574523 134159164888896 max_utils.py:756] Using (GB) 0.41 / 31.25 (1.312000%) on TPU_25(process=6,(1,6,0,0))
I0423 16:01:54.574549 134159164888896 max_utils.py:756] Using (GB) 0.41 / 31.25 (1.312000%) on TPU_28(process=6,(0,7,0,0))
I0423 16:01:54.574578 134159164888896 max_utils.py:756] Using (GB) 0.41 / 31.25 (1.312000%) on TPU_29(process=6,(1,7,0,0))
I0423 16:01:54.839968 134159164888896 metric_logger.py:185] completed step: 0, seconds: 4.029, TFLOP/s/device: 0.199, Tokens/s/device: 31.767, total_weights: 4096, loss: 10.889
I0423 16:01:54.951903 134159164888896 metric_logger.py:185] completed step: 1, seconds: 1.511, TFLOP/s/device: 0.530, Tokens/s/device: 84.689, total_weights: 4096, loss: 10.902
I0423 16:01:55.355148 134159164888896 metric_logger.py:185] completed step: 2, seconds: 0.042, TFLOP/s/device: 18.997, Tokens/s/device: 3036.197, total_weights: 4096, loss: 9.956
I0423 16:01:55.426052 134159164888896 metric_logger.py:185] completed step: 3, seconds: 0.403, TFLOP/s/device: 1.986, Tokens/s/device: 317.419, total_weights: 4096, loss: 9.139
I0423 16:01:55.567731 134159164888896 metric_logger.py:185] completed step: 4, seconds: 0.076, TFLOP/s/device: 10.586, Tokens/s/device: 1691.868, total_weights: 4096, loss: 8.458
I0423 16:01:55.573287 134159164888896 metric_logger.py:185] completed step: 5, seconds: 0.071, TFLOP/s/device: 11.331, Tokens/s/device: 1810.979, total_weights: 4096, loss: 7.924
I0423 16:02:04.863271 134159164888896 metric_logger.py:185] completed step: 6, seconds: 0.142, TFLOP/s/device: 5.636, Tokens/s/device: 900.742, total_weights: 4096, loss: 7.553
I0423 16:02:04.935311 134159164888896 metric_logger.py:185] completed step: 7, seconds: 9.221, TFLOP/s/device: 0.087, Tokens/s/device: 13.882, total_weights: 4096, loss: 7.267
I0423 16:02:05.007443 134159164888896 metric_logger.py:185] completed step: 8, seconds: 0.075, TFLOP/s/device: 10.733, Tokens/s/device: 1715.335, total_weights: 4096, loss: 7.111
I0423 16:02:05.078835 134159164888896 checkpointing.py:794] Waiting for step 9 to finish before checkpoint...
I0423 16:02:05.079460 134159164888896 checkpointing.py:798] Waited 0.0006430149078369141 seconds for step 9 to finish before starting checkpointing.
I0423 16:02:05.081363 134159164888896 checkpoint_manager.py:2024] [process=6][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0423 16:02:06.412570 2592 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0423 16:02:08.545531 134040996787968 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_03_dropout/checkpoints/0/items/array_metadatas/process_6
I0423 16:02:36.344496 134040988395264 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/gbytes_per_sec: 37.171 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.495110750198364 s) (per-host)
I0423 16:02:36.344621 134040988395264 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.772684s.
I0423 16:02:44.581556 134040988395264 async_checkpointer.py:144] [process=6][thread=async_save] Background save thread done. Time taken: 50.009602s.
I0423 16:02:44.581855 134035099600640 async_checkpointer.py:273] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0423 16:02:44.581976 134035099600640 async_checkpointer.py:283] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0423 16:02:44.582026 134035099600640 checkpoint_manager.py:2133] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0423 16:02:44.584271 134035099600640 checkpoint_manager.py:2142] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0423 16:02:44.584537 134159164888896 checkpoint_manager.py:2036] [process=6][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0423 16:02:44.584791 134159164888896 checkpoint_manager.py:1458] Waiting for previous save to complete took 39.503431 seconds. If this number is high, consider checkpointing less frequently.
I0423 16:02:44.586632 134159164888896 checkpoint_manager.py:1518] [process=6] Saving checkpoint at step 9
I0423 16:02:44.590083 134159164888896 async_checkpointer.py:452] [process=6] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_03_dropout/checkpoints/9.
I0423 16:02:45.135917 134159164888896 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array.
I0423 16:02:45.136015 134159164888896 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
I0423 16:02:45.179642 134159164888896 base_pytree_checkpoint_handler.py:153] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.044724s
I0423 16:02:45.179811 134159164888896 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/blocking_gbytes_per_sec: 5.060 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.304851770401001 s) (per-host)
I0423 16:02:45.179864 134159164888896 base_pytree_checkpoint_handler.py:737] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.304914s (batch_requests_ready=0.258289s, total_serialization_initiated=0.046554s, others=0.000072s)
I0423 16:02:45.179955 134159164888896 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.308800s (all_items=0.000014s, per_item={'items': '0.00001431'}, temp_paths=0.308785)
I0423 16:02:45.180823 134037247182592 async_checkpointer.py:79] [process=6][thread=async_save] Background save thread started.
I0423 16:02:45.180988 134159164888896 async_checkpointer.py:561] Finished blocking save. Time taken: 0.594287s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_03_dropout/checkpoints/9.
I0423 16:02:45.198037 134159164888896 checkpoint_manager.py:1566] [process=6][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0423 16:02:45.198355 134035099600640 async_checkpointer.py:265] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0423 16:02:45.198521 134159164888896 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_03_dropout/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776960125.0813339, 'wait_for_prev_duration_secs': 39.50343108177185, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776960164.5866718, 'checkpointer_blocking_duration_secs': 0.5944337844848633, 'get_old_steps_start_time': 1776960165.1811254, 'get_old_steps_duration_secs': 2.6941299438476562e-05, 'checkpoint_manager_blocking_start_time': 1776960125.0796912, 'checkpoint_manager_blocking_duration_secs': 40.11879253387451}
I0423 16:02:45.198631 134159164888896 checkpointing.py:409] Started an asynchronous checkpoint save for step 9
I0423 16:02:45.198677 134159164888896 checkpoint_manager.py:2024] [process=6][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0423 16:02:50.187813 134006905390848 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260423_155242/linen_xpk_feat_nnx_set_defaults_true_20260423_155242_03_dropout/checkpoints/9/items/array_metadatas/process_6
I0423 16:03:26.888631 134037247182592 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/gbytes_per_sec: 37.597 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.01362705230713 s) (per-host)
I0423 16:03:26.888748 134037247182592 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.707811s.
I0423 16:03:32.836924 134037247182592 async_checkpointer.py:144] [process=6][thread=async_save] Background save thread done. Time taken: 47.655970s.
I0423 16:03:32.837220 134035099600640 async_checkpointer.py:273] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0423 16:03:32.837339 134035099600640 async_checkpointer.py:283] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0423 16:03:32.837387 134035099600640 checkpoint_manager.py:2133] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0423 16:03:32.838714 134035099600640 checkpoint_manager.py:2142] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0423 16:03:32.838895 134159164888896 checkpoint_manager.py:2036] [process=6][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0423 16:03:32.839033 134159164888896 checkpoint_manager.py:2013] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0423 16:03:32.839797 134159164888896 metric_logger.py:185] completed step: 9, seconds: 0.072, TFLOP/s/device: 11.111, Tokens/s/device: 1775.755, 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: Thu Apr 23 16:03:44 UTC 2026
EXIT_CODE=0