XPK Start: Sun Apr 19 09:10:03 UTC 2026
2026-04-19 09:10:07.919370: 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 00:00:1776589807.931927 10 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered
E0000 00:00:1776589807.935588 10 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered
W0000 00:00:1776589807.946721 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776589807.946741 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776589807.946743 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776589807.946745 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
2026-04-19 09:10:26.931917: 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)
I0419 09:10:27.444483 133050411046720 max_utils.py:273] Attempting to initialize the jax distributed system...
INFO:2026-04-19 09:10:36,484:jax._src.distributed:140: Starting JAX distributed service on [::]:8482
I0419 09:10:36.484633 133050411046720 distributed.py:140] Starting JAX distributed service on [::]:8482
INFO:2026-04-19 09:10:36,486:jax._src.distributed:157: Connecting to JAX distributed service on mt-06-grad-accum-gnmny-slice-job-0-0.mt-06-grad-accum-gnmny:8482
I0419 09:10:36.486987 133050411046720 distributed.py:157] Connecting to JAX distributed service on mt-06-grad-accum-gnmny-slice-job-0-0.mt-06-grad-accum-gnmny:8482
I0419 09:10:38.493108 133050411046720 max_utils.py:284] Jax distributed system initialized!
I0419 09:10:45.367599 133050411046720 max_utils.py:800] System Information: Jax Version: 0.8.1
I0419 09:10:45.367706 133050411046720 max_utils.py:801] System Information: Jaxlib Version: 0.8.1
I0419 09:10:45.367747 133050411046720 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
I0419 09:10:45.367780 133050411046720 train_utils.py:347] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0419 09:10:45.985780 133050411046720 maxtext_utils.py:1398] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0419 09:10:45.986069 133050411046720 checkpointing.py:677] Setting up checkpoint logger...
I0419 09:10:45.986128 133050411046720 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0419 09:10:45.986173 133050411046720 pytree_checkpoint_handler.py:589] save_device_host_concurrent_bytes=None
I0419 09:10:45.986529 133050411046720 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 0x7901bc178fe0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0419 09:10:48.779722 133050411046720 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0419 09:10:48.779962 133050411046720 checkpoint_manager.py:709] [process=3][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x78ef4cd39af0>}, handler_registry=None
I0419 09:10:48.780205 133050411046720 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x78ef4cd39af0>` 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`.
I0419 09:10:48.780267 133050411046720 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x78ef4cddbc20>` 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`.
I0419 09:10:48.780305 133050411046720 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 0x78ef4cd39af0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x78ef4cd39af0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x78ef4cddbc20>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x78ef4cddbc20>}).
I0419 09:10:48.783009 133050411046720 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.33
I0419 09:10:48.783099 133050411046720 async_checkpointer.py:177] [process=3][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7901a55cb2e0> timeout: 600 secs and primary_host=0 for async checkpoint writes
I0419 09:10:50.830840 133050411046720 checkpoint_manager.py:1818] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260419_085454/linen_xpk_test_pipeline_scan_nnx_20260419_085454_06_grad_accum/checkpoints
I0419 09:10:50.833059 133050411046720 checkpoint_manager.py:929] [process=3][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_test_pipeline_scan_nnx_20260419_085454/linen_xpk_test_pipeline_scan_nnx_20260419_085454_06_grad_accum/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x78ef4d6e3470>
I0419 09:10:50.833180 133050411046720 checkpointing.py:301] Checkpoint manager created!
I0419 09:10:52.503949 133050411046720 nnx_wrappers.py:453] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0419 09:10:52.504060 133050411046720 nnx_wrappers.py:453] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0419 09:10:52.875081 133050411046720 attentions.py:1084] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0419 09:10:52.875179 133050411046720 attentions.py:1084] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0419 09:10:52.890921 133050411046720 attentions.py:1085] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0419 09:10:52.890984 133050411046720 attentions.py:1085] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0419 09:10:52.914126 133050411046720 attentions.py:1150] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0419 09:10:52.914207 133050411046720 attentions.py:1150] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0419 09:10:52.929939 133050411046720 attentions.py:1151] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0419 09:10:52.930001 133050411046720 attentions.py:1151] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0419 09:10:52.945745 133050411046720 attentions.py:1152] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0419 09:10:52.945807 133050411046720 attentions.py:1152] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0419 09:10:52.969717 133050411046720 attentions.py:1193] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0419 09:10:52.969787 133050411046720 attentions.py:1193] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0419 09:10:52.989588 133050411046720 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0419 09:10:52.989659 133050411046720 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0419 09:10:53.185221 133050411046720 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0419 09:10:53.185346 133050411046720 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0419 09:10:54.601497 133050411046720 maxtext_utils.py:1501] params/params/decoder/decoder_norm/scale
Shape: float32[2048]
Logical: PartitionSpec('norm',)
Physical: (None,)
I0419 09:10:54.601629 133050411046720 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)
I0419 09:10:54.601683 133050411046720 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)
I0419 09:10:54.601742 133050411046720 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')
I0419 09:10:54.601796 133050411046720 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)
I0419 09:10:54.601838 133050411046720 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)
I0419 09:10:54.601892 133050411046720 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)
I0419 09:10:54.601943 133050411046720 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')
I0419 09:10:54.601982 133050411046720 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)
I0419 09:10:54.602018 133050411046720 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)
I0419 09:10:54.602069 133050411046720 maxtext_utils.py:1501] params/params/decoder/logits_dense/kernel
Shape: float32[2048,32000]
Logical: PartitionSpec('embed', 'vocab')
Physical: ('fsdp', None)
I0419 09:10:54.602119 133050411046720 maxtext_utils.py:1501] params/params/token_embedder/embedding
Shape: float32[32000,2048]
Logical: PartitionSpec('vocab', 'embed')
Physical: (None, 'fsdp')
I0419 09:10:54.626219 133050411046720 gradient_accumulation.py:68] gradient_accumulation/inputs Logical: float32[2048]............................................... Unknown.
I0419 09:10:54.626300 133050411046720 gradient_accumulation.py:68] gradient_accumulation/inputs Physical: float32[2048]............................................... (None,).
I0419 09:10:54.641289 133050411046720 gradient_accumulation.py:68] gradient_accumulation/inputs Logical: float32[2048,16,7168]....................................... Unknown.
I0419 09:10:54.641349 133050411046720 gradient_accumulation.py:68] gradient_accumulation/inputs Physical: float32[2048,16,7168]....................................... ('fsdp', None, None).
I0419 09:10:54.670871 133050411046720 gradient_accumulation.py:68] gradient_accumulation/inputs Logical: float32[7168,16,2048]....................................... Unknown.
I0419 09:10:54.670947 133050411046720 gradient_accumulation.py:68] gradient_accumulation/inputs Physical: float32[7168,16,2048]....................................... (None, None, 'fsdp').
I0419 09:10:54.685804 133050411046720 gradient_accumulation.py:68] gradient_accumulation/inputs Logical: float32[2048,16]............................................ Unknown.
I0419 09:10:54.685858 133050411046720 gradient_accumulation.py:68] gradient_accumulation/inputs Physical: float32[2048,16]............................................ (None, None).
I0419 09:10:54.715555 133050411046720 gradient_accumulation.py:68] gradient_accumulation/inputs Logical: float32[2048,16,16,128]..................................... Unknown.
I0419 09:10:54.715619 133050411046720 gradient_accumulation.py:68] gradient_accumulation/inputs Physical: float32[2048,16,16,128]..................................... ('fsdp', None, None, None).
I0419 09:10:54.730535 133050411046720 gradient_accumulation.py:68] gradient_accumulation/inputs Logical: float32[16,16,128,2048]..................................... Unknown.
I0419 09:10:54.730591 133050411046720 gradient_accumulation.py:68] gradient_accumulation/inputs Physical: float32[16,16,128,2048]..................................... (None, None, None, 'fsdp').
I0419 09:10:54.775082 133050411046720 gradient_accumulation.py:68] gradient_accumulation/inputs Logical: float32[2048,32000]......................................... Unknown.
I0419 09:10:54.775156 133050411046720 gradient_accumulation.py:68] gradient_accumulation/inputs Physical: float32[2048,32000]......................................... ('fsdp', None).
I0419 09:10:54.789942 133050411046720 gradient_accumulation.py:68] gradient_accumulation/inputs Logical: float32[32000,2048]......................................... Unknown.
I0419 09:10:54.789994 133050411046720 gradient_accumulation.py:68] gradient_accumulation/inputs Physical: float32[32000,2048]......................................... (None, 'fsdp').
I0419 09:10:55.460222 133050411046720 train.py:156] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0419 09:10:55.460336 133050411046720 train.py:156] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0419 09:10:55.475984 133050411046720 train.py:163] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0419 09:10:55.476046 133050411046720 train.py:163] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0419 09:11:06.609174 133050411046720 max_utils.py:791] Total memory size: 1.7 GB, Output size: 0.4 GB, Temp size: 1.3 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB.
I0419 09:11:06.610066 133050411046720 metric_logger.py:289] number parameters: 1.104 billion
I0419 09:11:08.730699 133050411046720 checkpointing.py:772] Waiting for step 0 to finish before checkpoint...
I0419 09:11:19.148830 133050411046720 checkpointing.py:776] Waited 10.418111085891724 seconds for step 0 to finish before starting checkpointing.
I0419 09:11:19.151407 133050411046720 checkpoint_manager.py:2013] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0419 09:11:19.153312 133050411046720 checkpoint_manager.py:1518] [process=3] Saving checkpoint at step 0
I0419 09:11:19.156128 133050411046720 async_checkpointer.py:452] [process=3] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260419_085454/linen_xpk_test_pipeline_scan_nnx_20260419_085454_06_grad_accum/checkpoints/0.
I0419 09:11:20.143093 133050411046720 signaling_client.py:364] Using JaxDistributedSignalingClient
I0419 09:11:20.144207 133050411046720 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array.
I0419 09:11:20.144277 133050411046720 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
I0419 09:11:20.387936 133050411046720 base_pytree_checkpoint_handler.py:153] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.244928s
I0419 09:11:20.388120 133050411046720 base_pytree_checkpoint_handler.py:129] [process=3] /jax/checkpoint/write/blocking_gbytes_per_sec: 3.042 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.5071663856506348 s) (per-host)
I0419 09:11:20.388174 133050411046720 base_pytree_checkpoint_handler.py:737] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.507231s (batch_requests_ready=0.258724s, total_serialization_initiated=0.248434s, others=0.000072s)
I0419 09:11:20.388282 133050411046720 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.511383s (all_items=0.000021s, per_item={'items': '0.00002050'}, temp_paths=0.511363)
I0419 09:11:20.389229 132928113710848 async_checkpointer.py:79] [process=3][thread=async_save] Background save thread started.
I0419 09:11:20.389405 133050411046720 async_checkpointer.py:561] Finished blocking save. Time taken: 1.236021s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260419_085454/linen_xpk_test_pipeline_scan_nnx_20260419_085454_06_grad_accum/checkpoints/0.
I0419 09:11:20.839283 133050411046720 checkpoint_manager.py:1566] [process=3][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0419 09:11:20.839658 132924926056192 async_checkpointer.py:265] [process=3][thread=save_finalize] Waiting for background save thread=async_save.
I0419 09:11:20.839833 133050411046720 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260419_085454/linen_xpk_test_pipeline_scan_nnx_20260419_085454_06_grad_accum/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776589879.1513882, 'wait_for_prev_duration_secs': 6.556510925292969e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776589879.153351, 'checkpointer_blocking_duration_secs': 1.2361598014831543, 'get_old_steps_start_time': 1776589880.389532, 'get_old_steps_duration_secs': 2.574920654296875e-05, 'checkpoint_manager_blocking_start_time': 1776589879.149371, 'checkpoint_manager_blocking_duration_secs': 1.6904137134552002}
I0419 09:11:20.839940 133050411046720 checkpointing.py:408] Started an asynchronous checkpoint save for step 0
I0419 09:11:20.839992 133050411046720 max_utils.py:750]
Memstats: After params initialized:
I0419 09:11:20.840048 133050411046720 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_10(process=3,(2,2,0,0))
I0419 09:11:20.840084 133050411046720 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_11(process=3,(3,2,0,0))
I0419 09:11:20.840113 133050411046720 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_14(process=3,(2,3,0,0))
I0419 09:11:20.840139 133050411046720 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_15(process=3,(3,3,0,0))
I0419 09:11:21.105098 133050411046720 metric_logger.py:185] completed step: 0, seconds: 2.121, TFLOP/s/device: 25.630, Tokens/s/device: 3863.207, total_weights: 262144, loss: 10.877
I0419 09:11:21.714163 133050411046720 metric_logger.py:185] completed step: 1, seconds: 12.373, TFLOP/s/device: 4.392, Tokens/s/device: 662.082, total_weights: 262144, loss: 10.877
I0419 09:11:22.293525 133050411046720 metric_logger.py:185] completed step: 2, seconds: 0.030, TFLOP/s/device: 1803.023, Tokens/s/device: 271771.224, total_weights: 262144, loss: 10.563
I0419 09:11:22.872450 133050411046720 metric_logger.py:185] completed step: 3, seconds: 0.585, TFLOP/s/device: 92.939, Tokens/s/device: 14008.783, total_weights: 262144, loss: 10.272
I0419 09:11:23.056341 2420 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0419 09:11:24.030492 133050411046720 metric_logger.py:185] completed step: 4, seconds: 0.579, TFLOP/s/device: 93.812, Tokens/s/device: 14140.326, total_weights: 262144, loss: 10.022
I0419 09:11:24.036227 133050411046720 metric_logger.py:185] completed step: 5, seconds: 0.579, TFLOP/s/device: 93.888, Tokens/s/device: 14151.783, total_weights: 262144, loss: 9.820
I0419 09:11:24.954680 132928122103552 array_metadata_store.py:203] [process=3][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260419_085454/linen_xpk_test_pipeline_scan_nnx_20260419_085454_06_grad_accum/checkpoints/0/items/array_metadatas/process_3
I0419 09:11:58.083917 132928113710848 base_pytree_checkpoint_handler.py:129] [process=3] /jax/checkpoint/write/gbytes_per_sec: 41.348 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 38.202919244766235 s) (per-host)
I0419 09:11:58.084025 132928113710848 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 37.694674s.
I0419 09:12:02.558277 133050411046720 metric_logger.py:185] completed step: 6, seconds: 1.159, TFLOP/s/device: 46.911, Tokens/s/device: 7070.926, total_weights: 262144, loss: 9.667
I0419 09:12:03.137341 133050411046720 metric_logger.py:185] completed step: 7, seconds: 37.943, TFLOP/s/device: 1.432, Tokens/s/device: 215.900, total_weights: 262144, loss: 9.561
I0419 09:12:03.716247 133050411046720 metric_logger.py:185] completed step: 8, seconds: 0.584, TFLOP/s/device: 93.092, Tokens/s/device: 14031.866, total_weights: 262144, loss: 9.496
I0419 09:12:04.295205 133050411046720 checkpointing.py:772] Waiting for step 9 to finish before checkpoint...
I0419 09:12:04.295878 133050411046720 checkpointing.py:776] Waited 0.0006918907165527344 seconds for step 9 to finish before starting checkpointing.
I0419 09:12:04.297916 133050411046720 checkpoint_manager.py:2024] [process=3][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0419 09:12:41.528071 132928113710848 async_checkpointer.py:144] [process=3][thread=async_save] Background save thread done. Time taken: 81.138704s.
I0419 09:12:41.528390 132924926056192 async_checkpointer.py:273] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save.
I0419 09:12:41.528517 132924926056192 async_checkpointer.py:283] [process=3][thread=save_finalize] No errors found in background save thread=async_save.
I0419 09:12:41.528587 132924926056192 checkpoint_manager.py:2133] [process=3][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0419 09:12:41.530060 132924926056192 checkpoint_manager.py:2142] [process=3][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0419 09:12:41.530221 133050411046720 checkpoint_manager.py:2036] [process=3][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0419 09:12:41.530373 133050411046720 checkpoint_manager.py:1458] Waiting for previous save to complete took 37.232463 seconds. If this number is high, consider checkpointing less frequently.
I0419 09:12:41.533805 133050411046720 checkpoint_manager.py:1518] [process=3] Saving checkpoint at step 9
I0419 09:12:41.537366 133050411046720 async_checkpointer.py:452] [process=3] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260419_085454/linen_xpk_test_pipeline_scan_nnx_20260419_085454_06_grad_accum/checkpoints/9.
I0419 09:12:42.950083 133050411046720 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array.
I0419 09:12:42.950193 133050411046720 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
I0419 09:12:42.995312 133050411046720 base_pytree_checkpoint_handler.py:153] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.046357s
I0419 09:12:42.995483 133050411046720 base_pytree_checkpoint_handler.py:129] [process=3] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.118 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.7284677028656006 s) (per-host)
I0419 09:12:42.995534 133050411046720 base_pytree_checkpoint_handler.py:737] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.728528s (batch_requests_ready=0.680230s, total_serialization_initiated=0.048229s, others=0.000069s)
I0419 09:12:42.995623 133050411046720 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.732668s (all_items=0.000018s, per_item={'items': '0.00001788'}, temp_paths=0.732650)
I0419 09:12:42.996500 132924405970688 async_checkpointer.py:79] [process=3][thread=async_save] Background save thread started.
I0419 09:12:42.996656 133050411046720 async_checkpointer.py:561] Finished blocking save. Time taken: 1.462781s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260419_085454/linen_xpk_test_pipeline_scan_nnx_20260419_085454_06_grad_accum/checkpoints/9.
I0419 09:12:43.003718 133050411046720 checkpoint_manager.py:1566] [process=3][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0419 09:12:43.004012 132924926056192 async_checkpointer.py:265] [process=3][thread=save_finalize] Waiting for background save thread=async_save.
I0419 09:12:43.004178 133050411046720 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260419_085454/linen_xpk_test_pipeline_scan_nnx_20260419_085454_06_grad_accum/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776589924.2978861, 'wait_for_prev_duration_secs': 37.232463359832764, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776589961.533847, 'checkpointer_blocking_duration_secs': 1.4629147052764893, 'get_old_steps_start_time': 1776589962.9967794, 'get_old_steps_duration_secs': 2.47955322265625e-05, 'checkpoint_manager_blocking_start_time': 1776589924.296101, 'checkpoint_manager_blocking_duration_secs': 38.70804452896118}
I0419 09:12:43.004297 133050411046720 checkpointing.py:408] Started an asynchronous checkpoint save for step 9
I0419 09:12:43.004343 133050411046720 checkpoint_manager.py:2024] [process=3][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0419 09:12:47.869315 132928122103552 array_metadata_store.py:203] [process=3][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260419_085454/linen_xpk_test_pipeline_scan_nnx_20260419_085454_06_grad_accum/checkpoints/9/items/array_metadatas/process_3
I0419 09:13:24.366936 132924405970688 base_pytree_checkpoint_handler.py:129] [process=3] /jax/checkpoint/write/gbytes_per_sec: 37.520 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.09987950325012 s) (per-host)
I0419 09:13:24.367058 132924405970688 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.370446s.
I0419 09:13:30.196184 132924405970688 async_checkpointer.py:144] [process=3][thread=async_save] Background save thread done. Time taken: 47.199557s.
I0419 09:13:30.196527 132924926056192 async_checkpointer.py:273] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save.
I0419 09:13:30.196650 132924926056192 async_checkpointer.py:283] [process=3][thread=save_finalize] No errors found in background save thread=async_save.
I0419 09:13:30.196698 132924926056192 checkpoint_manager.py:2133] [process=3][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0419 09:13:30.198293 132924926056192 checkpoint_manager.py:2142] [process=3][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0419 09:13:30.198479 133050411046720 checkpoint_manager.py:2036] [process=3][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0419 09:13:30.198621 133050411046720 checkpoint_manager.py:2013] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0419 09:13:30.199327 133050411046720 metric_logger.py:185] completed step: 9, seconds: 0.579, TFLOP/s/device: 93.861, Tokens/s/device: 14147.677, total_weights: 262144, loss: 9.457
Per train step:
Total TFLOPs: 54.35
split as 93.93% learnable weight flops and 6.07% attention flops
XPK End: Sun Apr 19 09:13:39 UTC 2026
EXIT_CODE=0