XPK Start: Tue Apr 21 02:08:12 UTC 2026
2026-04-21 02:08:16.379586: 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 00:00:1776737296.392361 10 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered
E0000 00:00:1776737296.396039 10 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered
W0000 00:00:1776737296.407340 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776737296.407358 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776737296.407361 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776737296.407363 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
2026-04-21 02:08:35.752191: 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 02:08:36.263068 139103314573120 max_utils.py:273] Attempting to initialize the jax distributed system...
INFO:2026-04-21 02:08:45,304:jax._src.distributed:140: Starting JAX distributed service on [::]:8482
I0421 02:08:45.304523 139103314573120 distributed.py:140] Starting JAX distributed service on [::]:8482
INFO:2026-04-21 02:08:45,306:jax._src.distributed:157: Connecting to JAX distributed service on mt-15-ocdbt-false-rs-nn8ey-slice-job-0-0.mt-15-ocdbt-false-rs-nn8ey:8482
I0421 02:08:45.306916 139103314573120 distributed.py:157] Connecting to JAX distributed service on mt-15-ocdbt-false-rs-nn8ey-slice-job-0-0.mt-15-ocdbt-false-rs-nn8ey:8482
I0421 02:08:46.162934 139103314573120 max_utils.py:284] Jax distributed system initialized!
I0421 02:08:53.206022 139103314573120 max_utils.py:800] System Information: Jax Version: 0.8.1
I0421 02:08:53.206125 139103314573120 max_utils.py:801] System Information: Jaxlib Version: 0.8.1
I0421 02:08:53.206166 139103314573120 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 02:08:53.206201 139103314573120 train_utils.py:347] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0421 02:08:53.830069 139103314573120 maxtext_utils.py:1398] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0421 02:08:53.830355 139103314573120 checkpointing.py:677] Setting up checkpoint logger...
I0421 02:08:53.830426 139103314573120 checkpointing.py:233] Creating checkpoint manager with ocdbt=False and zarr3=True
I0421 02:08:53.830473 139103314573120 pytree_checkpoint_handler.py:589] save_device_host_concurrent_bytes=None
I0421 02:08:53.830885 139103314573120 base_pytree_checkpoint_handler.py:415] Created BasePyTreeCheckpointHandler: use_ocdbt=False, use_zarr3=True, pytree_metadata_options=PyTreeMetadataOptions(support_rich_types=False), array_metadata_store=<orbax.checkpoint._src.metadata.array_metadata_store.Store object at 0x7e82f8579340>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0421 02:08:55.110300 139103314573120 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0421 02:08:55.110551 139103314573120 checkpoint_manager.py:709] [process=1][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e709a1ddbe0>}, handler_registry=None
I0421 02:08:55.110780 139103314573120 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e709a1ddbe0>` 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 02:08:55.110828 139103314573120 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e70996bb020>` 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 02:08:55.110865 139103314573120 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 0x7e709a1ddbe0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e709a1ddbe0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e70996bb020>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e70996bb020>}).
I0421 02:08:55.111414 139103314573120 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.33
I0421 02:08:55.111497 139103314573120 async_checkpointer.py:177] [process=1][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7e6fa322c040> timeout: 600 secs and primary_host=0 for async checkpoint writes
I0421 02:08:57.841493 138982918711040 checkpoint.py:228] Read Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776737183401969848, 'commit_timestamp_nsecs': 1776737198365249227, 'custom_metadata': {}} from gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_false/checkpoints/5/_CHECKPOINT_METADATA
I0421 02:08:58.088435 138982918711040 checkpoint_manager.py:1877] Missing metrics for step 5
I0421 02:08:58.655040 139103314573120 checkpoint_manager.py:1818] Found 3 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_false/checkpoints
I0421 02:08:58.936076 139103314573120 checkpoint_manager.py:929] [process=1][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=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, lightweight_initialize=False), root_directory=gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7e70996b6a20>
I0421 02:08:58.936250 139103314573120 checkpointing.py:301] Checkpoint manager created!
I0421 02:08:59.823739 139103314573120 nnx_wrappers.py:453] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0421 02:08:59.823842 139103314573120 nnx_wrappers.py:453] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0421 02:09:00.197824 139103314573120 attentions.py:1084] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0421 02:09:00.197925 139103314573120 attentions.py:1084] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0421 02:09:00.213841 139103314573120 attentions.py:1085] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0421 02:09:00.213906 139103314573120 attentions.py:1085] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0421 02:09:00.237010 139103314573120 attentions.py:1150] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0421 02:09:00.237085 139103314573120 attentions.py:1150] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 02:09:00.253120 139103314573120 attentions.py:1151] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0421 02:09:00.253186 139103314573120 attentions.py:1151] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 02:09:00.269131 139103314573120 attentions.py:1152] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0421 02:09:00.269198 139103314573120 attentions.py:1152] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 02:09:00.294373 139103314573120 attentions.py:1193] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0421 02:09:00.294456 139103314573120 attentions.py:1193] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 02:09:00.314038 139103314573120 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0421 02:09:00.314104 139103314573120 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0421 02:09:00.506298 139103314573120 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0421 02:09:00.506426 139103314573120 checkpointing.py:581] restoring from this run's directory step 9
I0421 02:09:01.442171 139103314573120 checkpointer.py:304] Restoring checkpoint from gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_false/checkpoints/9.
I0421 02:09:04.444691 1445 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0421 02:09:14.381864 139103314573120 jax_array_handlers.py:837] [process=1] /jax/orbax/read/worker/io/requested throughput: 138.415 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 11.41690969467163 s) (per-host)
I0421 02:09:14.398856 139103314573120 base_pytree_checkpoint_handler.py:129] [process=1] /jax/checkpoint/read/gbytes_per_sec: 133.893 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 11.819809436798096 s) (per-host)
I0421 02:09:14.934773 139103314573120 checkpointer.py:318] Finished restoring checkpoint in 14.17 seconds from gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_false/checkpoints/9.
I0421 02:09:14.934946 139103314573120 standard_logger.py:34] {'step': 9, 'event_type': 'restore', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_false/checkpoints', 'checkpointer_start_time': 1776737340.7638013, 'checkpointer_duration_secs': 14.171112298965454, 'checkpoint_manager_start_time': 1776737340.5066702, 'checkpoint_manager_duration_secs': 14.428245067596436}
fsdp: 32
I0421 02:09:15.337688 139103314573120 maxtext_utils.py:1501] params/params/decoder/decoder_norm/scale
Shape: float32[2048]
Logical: PartitionSpec('norm',)
Physical: (None,)
I0421 02:09:15.337816 139103314573120 maxtext_utils.py:1501] params/params/decoder/layers/mlp/wi_0/kernel
Shape: float32[2048,16,7168]
Logical: PartitionSpec('embed', 'layers', 'mlp')
Physical: ('fsdp', None, None)
I0421 02:09:15.337874 139103314573120 maxtext_utils.py:1501] params/params/decoder/layers/mlp/wi_1/kernel
Shape: float32[2048,16,7168]
Logical: PartitionSpec('embed', 'layers', 'mlp')
Physical: ('fsdp', None, None)
I0421 02:09:15.337930 139103314573120 maxtext_utils.py:1501] params/params/decoder/layers/mlp/wo/kernel
Shape: float32[7168,16,2048]
Logical: PartitionSpec('mlp', 'layers', 'embed')
Physical: (None, None, 'fsdp')
I0421 02:09:15.337984 139103314573120 maxtext_utils.py:1501] params/params/decoder/layers/post_self_attention_layer_norm/scale
Shape: float32[2048,16]
Logical: PartitionSpec('norm', 'layers')
Physical: (None, None)
I0421 02:09:15.338023 139103314573120 maxtext_utils.py:1501] params/params/decoder/layers/pre_self_attention_layer_norm/scale
Shape: float32[2048,16]
Logical: PartitionSpec('norm', 'layers')
Physical: (None, None)
I0421 02:09:15.338078 139103314573120 maxtext_utils.py:1501] 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 02:09:15.338131 139103314573120 maxtext_utils.py:1501] 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 02:09:15.338171 139103314573120 maxtext_utils.py:1501] 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 02:09:15.338206 139103314573120 maxtext_utils.py:1501] 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 02:09:15.338252 139103314573120 maxtext_utils.py:1501] params/params/decoder/logits_dense/kernel
Shape: float32[2048,32000]
Logical: PartitionSpec('embed', 'vocab')
Physical: ('fsdp', None)
I0421 02:09:15.338296 139103314573120 maxtext_utils.py:1501] params/params/token_embedder/embedding
Shape: float32[32000,2048]
Logical: PartitionSpec('vocab', 'embed')
Physical: (None, 'fsdp')
I0421 02:09:15.844451 139103314573120 train.py:156] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0421 02:09:15.844547 139103314573120 train.py:156] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0421 02:09:15.859428 139103314573120 train.py:163] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0421 02:09:15.859486 139103314573120 train.py:163] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0421 02:09:26.653321 139103314573120 max_utils.py:791] Total memory size: 1.5 GB, Output size: 0.4 GB, Temp size: 1.1 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB.
I0421 02:09:26.654219 139103314573120 metric_logger.py:289] number parameters: 1.104 billion
I0421 02:09:37.811668 139103314573120 checkpointing.py:772] Waiting for step 10 to finish before checkpoint...
I0421 02:09:37.973112 139103314573120 checkpointing.py:776] Waited 0.16142868995666504 seconds for step 10 to finish before starting checkpointing.
I0421 02:09:37.975603 139103314573120 checkpoint_manager.py:2013] [process=1][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0421 02:09:37.977336 139103314573120 checkpoint_manager.py:1518] [process=1] Saving checkpoint at step 10
I0421 02:09:37.980659 139103314573120 async_checkpointer.py:452] [process=1] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_false/checkpoints/10.
I0421 02:09:38.998803 139103314573120 signaling_client.py:364] Using JaxDistributedSignalingClient
I0421 02:09:38.999775 139103314573120 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array.
I0421 02:09:38.999834 139103314573120 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0421 02:09:39.256636 139103314573120 base_pytree_checkpoint_handler.py:153] [process=1][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.257926s
I0421 02:09:39.256798 139103314573120 base_pytree_checkpoint_handler.py:129] [process=1] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.904 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.5312676429748535 s) (per-host)
I0421 02:09:39.256850 139103314573120 base_pytree_checkpoint_handler.py:737] [process=1][thread=MainThread] Initiated Pytree async_save. Time taken: 0.531330s (batch_requests_ready=0.271317s, total_serialization_initiated=0.259942s, others=0.000071s)
I0421 02:09:39.256920 139103314573120 composite_checkpoint_handler.py:715] [process=1][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.535278s (all_items=0.000020s, per_item={'items': '0.00001979'}, temp_paths=0.535258)
I0421 02:09:39.257851 138981148702464 async_checkpointer.py:79] [process=1][thread=async_save] Background save thread started.
I0421 02:09:39.258021 139103314573120 async_checkpointer.py:561] Finished blocking save. Time taken: 1.280615s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_false/checkpoints/10.
I0421 02:09:39.259860 139103314573120 checkpoint_manager.py:1566] [process=1][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize
I0421 02:09:39.260084 138978037208832 async_checkpointer.py:265] [process=1][thread=save_finalize] Waiting for background save thread=async_save.
I0421 02:09:39.260178 139103314573120 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776737377.9755857, 'wait_for_prev_duration_secs': 6.198883056640625e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776737377.9773731, 'checkpointer_blocking_duration_secs': 1.2807562351226807, 'get_old_steps_start_time': 1776737379.2581484, 'get_old_steps_duration_secs': 2.8133392333984375e-05, 'checkpoint_manager_blocking_start_time': 1776737377.9735687, 'checkpoint_manager_blocking_duration_secs': 1.286576271057129}
I0421 02:09:39.260325 139103314573120 checkpointing.py:408] Started an asynchronous checkpoint save for step 10
I0421 02:09:39.260375 139103314573120 max_utils.py:750]
Memstats: After params initialized:
I0421 02:09:39.260434 139103314573120 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_2(process=1,(2,0,0,0))
I0421 02:09:39.260469 139103314573120 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_3(process=1,(3,0,0,0))
I0421 02:09:39.260495 139103314573120 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_6(process=1,(2,1,0,0))
I0421 02:09:39.260519 139103314573120 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_7(process=1,(3,1,0,0))
I0421 02:09:39.517140 139103314573120 metric_logger.py:185] completed step: 10, seconds: 11.157, TFLOP/s/device: 1.218, Tokens/s/device: 183.556, total_weights: 65536, loss: 6.833
I0421 02:09:39.706095 139103314573120 metric_logger.py:185] completed step: 11, seconds: 1.704, TFLOP/s/device: 7.973, Tokens/s/device: 1201.767, total_weights: 65536, loss: 6.528
I0421 02:09:39.853716 139103314573120 metric_logger.py:185] completed step: 12, seconds: 0.042, TFLOP/s/device: 324.267, Tokens/s/device: 48877.115, total_weights: 65536, loss: 6.265
I0421 02:09:40.001300 139103314573120 metric_logger.py:185] completed step: 13, seconds: 0.153, TFLOP/s/device: 88.847, Tokens/s/device: 13391.923, total_weights: 65536, loss: 6.045
I0421 02:09:40.006148 139103314573120 checkpointing.py:772] Waiting for step 15 to finish before checkpoint...
I0421 02:09:40.296008 139103314573120 checkpointing.py:776] Waited 0.2898240089416504 seconds for step 15 to finish before starting checkpointing.
I0421 02:09:40.298895 139103314573120 checkpoint_manager.py:2024] [process=1][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0421 02:09:44.976019 138978606958336 array_metadata_store.py:203] [process=1][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_false/checkpoints/10/items/array_metadatas/process_1
I0421 02:09:50.863846 138981148702464 base_pytree_checkpoint_handler.py:129] [process=1] /jax/checkpoint/write/gbytes_per_sec: 130.134 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 12.138274192810059 s) (per-host)
I0421 02:09:50.863963 138981148702464 async_checkpointer.py:90] [process=1][thread=async_save] 3 Handler Commit operations completed. Time taken: 11.606001s.
I0421 02:09:56.082474 138981148702464 async_checkpointer.py:144] [process=1][thread=async_save] Background save thread done. Time taken: 16.824495s.
I0421 02:09:56.082744 138978037208832 async_checkpointer.py:273] [process=1][thread=save_finalize] Done with waiting for background save thread=async_save.
I0421 02:09:56.082860 138978037208832 async_checkpointer.py:283] [process=1][thread=save_finalize] No errors found in background save thread=async_save.
I0421 02:09:56.082909 138978037208832 checkpoint_manager.py:2133] [process=1][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts...
I0421 02:09:56.084698 138978037208832 checkpoint_manager.py:2142] [process=1][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts.
I0421 02:09:56.084869 139103314573120 checkpoint_manager.py:2036] [process=1][thread=MainThread][step=10][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=10.
W0421 02:09:56.085009 139103314573120 checkpoint_manager.py:1458] Waiting for previous save to complete took 15.786118 seconds. If this number is high, consider checkpointing less frequently.
I0421 02:09:56.087084 139103314573120 checkpoint_manager.py:1518] [process=1] Saving checkpoint at step 15
I0421 02:09:56.091300 139103314573120 async_checkpointer.py:452] [process=1] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_false/checkpoints/15.
I0421 02:09:57.468970 139103314573120 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array.
I0421 02:09:57.469069 139103314573120 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0421 02:09:57.514996 139103314573120 base_pytree_checkpoint_handler.py:153] [process=1][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.047420s
I0421 02:09:57.515177 139103314573120 base_pytree_checkpoint_handler.py:129] [process=1] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.119 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.7280905246734619 s) (per-host)
I0421 02:09:57.515233 139103314573120 base_pytree_checkpoint_handler.py:737] [process=1][thread=MainThread] Initiated Pytree async_save. Time taken: 0.728158s (batch_requests_ready=0.678752s, total_serialization_initiated=0.049329s, others=0.000076s)
I0421 02:09:57.515324 139103314573120 composite_checkpoint_handler.py:715] [process=1][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.732999s (all_items=0.000014s, per_item={'items': '0.00001383'}, temp_paths=0.732985)
I0421 02:09:57.516247 138978606958336 async_checkpointer.py:79] [process=1][thread=async_save] Background save thread started.
I0421 02:09:57.516420 139103314573120 async_checkpointer.py:561] Finished blocking save. Time taken: 1.429250s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_false/checkpoints/15.
I0421 02:09:57.518236 139103314573120 checkpoint_manager.py:1566] [process=1][thread=MainThread][step=15] Starting CheckpointManager Save Finalize thread=save_finalize
I0421 02:09:57.518495 138978037208832 async_checkpointer.py:265] [process=1][thread=save_finalize] Waiting for background save thread=async_save.
I0421 02:09:57.518622 139103314573120 standard_logger.py:34] {'step': 15, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776737380.298867, 'wait_for_prev_duration_secs': 15.786118268966675, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776737396.0871239, 'checkpointer_blocking_duration_secs': 1.4294054508209229, 'get_old_steps_start_time': 1776737397.5165486, 'get_old_steps_duration_secs': 2.6226043701171875e-05, 'checkpoint_manager_blocking_start_time': 1776737380.2967203, 'checkpoint_manager_blocking_duration_secs': 17.221871376037598}
I0421 02:09:57.518781 139103314573120 checkpointing.py:408] Started an asynchronous checkpoint save for step 15
I0421 02:09:57.519263 139103314573120 metric_logger.py:185] completed step: 14, seconds: 0.148, TFLOP/s/device: 91.866, Tokens/s/device: 13847.007, total_weights: 65536, loss: 5.864
I0421 02:09:57.524852 139103314573120 metric_logger.py:185] completed step: 15, seconds: 0.147, TFLOP/s/device: 92.128, Tokens/s/device: 13886.535, total_weights: 65536, loss: 5.719
I0421 02:10:15.318651 139103314573120 metric_logger.py:185] completed step: 16, seconds: 17.517, TFLOP/s/device: 0.776, Tokens/s/device: 116.912, total_weights: 65536, loss: 5.605
I0421 02:10:15.466226 139103314573120 metric_logger.py:185] completed step: 17, seconds: 17.648, TFLOP/s/device: 0.770, Tokens/s/device: 116.049, total_weights: 65536, loss: 5.517
I0421 02:10:15.613791 139103314573120 metric_logger.py:185] completed step: 18, seconds: 0.152, TFLOP/s/device: 89.267, Tokens/s/device: 13455.272, total_weights: 65536, loss: 5.448
I0421 02:10:15.760856 139103314573120 checkpointing.py:772] Waiting for step 19 to finish before checkpoint...
I0421 02:10:15.761547 139103314573120 checkpointing.py:776] Waited 0.0007104873657226562 seconds for step 19 to finish before starting checkpointing.
I0421 02:10:15.763494 139103314573120 checkpoint_manager.py:2024] [process=1][thread=MainThread][step=15][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0421 02:10:20.141654 138980217571072 array_metadata_store.py:203] [process=1][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_false/checkpoints/15/items/array_metadatas/process_1
I0421 02:10:25.498853 138978606958336 base_pytree_checkpoint_handler.py:129] [process=1] /jax/checkpoint/write/gbytes_per_sec: 55.016 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 28.711719751358032 s) (per-host)
I0421 02:10:25.498973 138978606958336 async_checkpointer.py:90] [process=1][thread=async_save] 3 Handler Commit operations completed. Time taken: 27.982616s.
I0421 02:10:32.956008 138978606958336 async_checkpointer.py:144] [process=1][thread=async_save] Background save thread done. Time taken: 35.439637s.
I0421 02:10:32.956259 138978037208832 async_checkpointer.py:273] [process=1][thread=save_finalize] Done with waiting for background save thread=async_save.
I0421 02:10:32.956373 138978037208832 async_checkpointer.py:283] [process=1][thread=save_finalize] No errors found in background save thread=async_save.
I0421 02:10:32.956446 138978037208832 checkpoint_manager.py:2133] [process=1][thread=save_finalize][step=15] CheckpointManager Save Finalize is syncing with other hosts...
I0421 02:10:32.958197 138978037208832 checkpoint_manager.py:2142] [process=1][thread=save_finalize][step=15] CheckpointManager Save Finalize is done on all hosts.
I0421 02:10:32.958368 139103314573120 checkpoint_manager.py:2036] [process=1][thread=MainThread][step=15][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=15.
W0421 02:10:32.958501 139103314573120 checkpoint_manager.py:1458] Waiting for previous save to complete took 17.195018 seconds. If this number is high, consider checkpointing less frequently.
I0421 02:10:32.960363 139103314573120 checkpoint_manager.py:1518] [process=1] Saving checkpoint at step 19
I0421 02:10:32.963909 139103314573120 async_checkpointer.py:452] [process=1] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_false/checkpoints/19.
I0421 02:10:33.917510 139103314573120 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array.
I0421 02:10:33.917605 139103314573120 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0421 02:10:33.964962 139103314573120 base_pytree_checkpoint_handler.py:153] [process=1][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.048423s
I0421 02:10:33.965132 139103314573120 base_pytree_checkpoint_handler.py:129] [process=1] /jax/checkpoint/write/blocking_gbytes_per_sec: 5.113 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.30167651176452637 s) (per-host)
I0421 02:10:33.965184 139103314573120 base_pytree_checkpoint_handler.py:737] [process=1][thread=MainThread] Initiated Pytree async_save. Time taken: 0.301739s (batch_requests_ready=0.251149s, total_serialization_initiated=0.050522s, others=0.000067s)
I0421 02:10:33.965319 139103314573120 composite_checkpoint_handler.py:715] [process=1][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.305790s (all_items=0.000012s, per_item={'items': '0.00001240'}, temp_paths=0.305777)
I0421 02:10:33.966250 138976434296576 async_checkpointer.py:79] [process=1][thread=async_save] Background save thread started.
I0421 02:10:33.966429 139103314573120 async_checkpointer.py:561] Finished blocking save. Time taken: 1.005971s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_false/checkpoints/19.
I0421 02:10:34.371382 139103314573120 checkpoint_manager.py:1566] [process=1][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize
I0421 02:10:34.371761 138978037208832 async_checkpointer.py:265] [process=1][thread=save_finalize] Waiting for background save thread=async_save.
I0421 02:10:34.371934 139103314573120 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776737415.763467, 'wait_for_prev_duration_secs': 17.19501781463623, 'time_between_consecutive_saves_sec': 19.678728818893433, 'checkpointer_blocking_start_time': 1776737432.960416, 'checkpointer_blocking_duration_secs': 1.0061240196228027, 'get_old_steps_start_time': 1776737433.9665525, 'get_old_steps_duration_secs': 2.1696090698242188e-05, 'checkpoint_manager_blocking_start_time': 1776737415.7617762, 'checkpoint_manager_blocking_duration_secs': 18.610122680664062}
I0421 02:10:34.372040 139103314573120 checkpointing.py:408] Started an asynchronous checkpoint save for step 19
I0421 02:10:34.372082 139103314573120 checkpoint_manager.py:2024] [process=1][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0421 02:10:39.550290 138980217571072 array_metadata_store.py:203] [process=1][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260421_005327/linen_xpk_test_pipeline_scan_nnx_20260421_005327_15_ocdbt_false/checkpoints/19/items/array_metadatas/process_1
I0421 02:10:44.675843 138976434296576 base_pytree_checkpoint_handler.py:129] [process=1] /jax/checkpoint/write/gbytes_per_sec: 143.439 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 11.012347221374512 s) (per-host)
I0421 02:10:44.675957 138976434296576 async_checkpointer.py:90] [process=1][thread=async_save] 3 Handler Commit operations completed. Time taken: 10.709595s.
I0421 02:10:50.187849 138976434296576 async_checkpointer.py:144] [process=1][thread=async_save] Background save thread done. Time taken: 16.221472s.
I0421 02:10:50.188075 138978037208832 async_checkpointer.py:273] [process=1][thread=save_finalize] Done with waiting for background save thread=async_save.
I0421 02:10:50.188133 138978037208832 async_checkpointer.py:283] [process=1][thread=save_finalize] No errors found in background save thread=async_save.
I0421 02:10:50.188198 138978037208832 checkpoint_manager.py:2133] [process=1][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts...
I0421 02:10:50.190311 138978037208832 checkpoint_manager.py:2142] [process=1][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts.
I0421 02:10:50.190476 139103314573120 checkpoint_manager.py:2036] [process=1][thread=MainThread][step=19][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=19.
I0421 02:10:50.190617 139103314573120 checkpoint_manager.py:2013] [process=1][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0421 02:10:50.191281 139103314573120 metric_logger.py:185] completed step: 19, seconds: 0.147, TFLOP/s/device: 92.132, Tokens/s/device: 13887.194, total_weights: 65536, loss: 5.391
Per train step:
Total TFLOPs: 13.59
split as 93.93% learnable weight flops and 6.07% attention flops
XPK End: Tue Apr 21 02:11:02 UTC 2026
EXIT_CODE=0