XPK Start: Sun Apr 19 03:49:59 UTC 2026
2026-04-19 03:50:03.167296: 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 00:00:1776570603.180197 10 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered
E0000 00:00:1776570603.183914 10 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered
W0000 00:00:1776570603.195177 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776570603.195198 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776570603.195200 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776570603.195202 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
2026-04-19 03:50:22.283022: 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 03:50:22.802448 134836086728512 max_utils.py:273] Attempting to initialize the jax distributed system...
INFO:2026-04-19 03:50:31,843:jax._src.distributed:140: Starting JAX distributed service on [::]:8482
I0419 03:50:31.843783 134836086728512 distributed.py:140] Starting JAX distributed service on [::]:8482
INFO:2026-04-19 03:50:31,846:jax._src.distributed:157: Connecting to JAX distributed service on mt-10-shardy-true-dou05-slice-job-0-0.mt-10-shardy-true-dou05:8482
I0419 03:50:31.846149 134836086728512 distributed.py:157] Connecting to JAX distributed service on mt-10-shardy-true-dou05-slice-job-0-0.mt-10-shardy-true-dou05:8482
I0419 03:50:33.594229 134836086728512 max_utils.py:284] Jax distributed system initialized!
I0419 03:50:40.545073 134836086728512 max_utils.py:800] System Information: Jax Version: 0.8.1
I0419 03:50:40.545178 134836086728512 max_utils.py:801] System Information: Jaxlib Version: 0.8.1
I0419 03:50:40.545219 134836086728512 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 03:50:40.545273 134836086728512 train_utils.py:377] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0419 03:50:41.163806 134836086728512 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0419 03:50:41.164425 134836086728512 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0419 03:50:41.164609 134836086728512 checkpointing.py:688] Setting up checkpoint logger...
I0419 03:50:41.164660 134836086728512 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True
I0419 03:50:41.164702 134836086728512 pytree_checkpoint_handler.py:589] save_device_host_concurrent_bytes=None
I0419 03:50:41.165064 134836086728512 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 0x7aa177b70f80>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0419 03:50:44.435539 134836086728512 checkpointing.py:266] Enabling policy for fixed interval checkpointing.
I0419 03:50:44.435780 134836086728512 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 0x7a8efa6e5d90>}, handler_registry=None
I0419 03:50:44.436018 134836086728512 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7a8efa6e5d90>` 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 03:50:44.436064 134836086728512 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a8efa6eaf30>` 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 03:50:44.436100 134836086728512 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 0x7a8efa6e5d90>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7a8efa6e5d90>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a8efa6eaf30>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a8efa6eaf30>}).
I0419 03:50:44.436613 134836086728512 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.33
I0419 03:50:44.436692 134836086728512 async_checkpointer.py:177] [process=3][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7a8d045344a0> timeout: 600 secs and primary_host=0 for async checkpoint writes
I0419 03:50:46.449450 134836086728512 checkpoint_manager.py:1818] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_true/checkpoints
I0419 03:50:46.887089 134836086728512 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_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_true/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7aa034152ff0>
I0419 03:50:46.887290 134836086728512 checkpointing.py:302] Checkpoint manager created!
I0419 03:50:47.799707 134836086728512 nnx_wrappers.py:455] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0419 03:50:47.799811 134836086728512 nnx_wrappers.py:455] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0419 03:50:48.166857 134836086728512 attentions.py:1084] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0419 03:50:48.166952 134836086728512 attentions.py:1084] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0419 03:50:48.182982 134836086728512 attentions.py:1085] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0419 03:50:48.183045 134836086728512 attentions.py:1085] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0419 03:50:48.206413 134836086728512 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 03:50:48.206483 134836086728512 attentions.py:1150] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0419 03:50:48.222280 134836086728512 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 03:50:48.222340 134836086728512 attentions.py:1151] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0419 03:50:48.238074 134836086728512 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 03:50:48.238136 134836086728512 attentions.py:1152] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0419 03:50:48.262316 134836086728512 attentions.py:1193] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0419 03:50:48.262387 134836086728512 attentions.py:1193] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0419 03:50:48.281904 134836086728512 linears.py:541] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0419 03:50:48.281967 134836086728512 linears.py:541] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0419 03:50:48.471339 134836086728512 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint
I0419 03:50:48.471453 134836086728512 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0419 03:50:49.900616 134836086728512 maxtext_utils.py:1740] params/params/decoder/decoder_norm/scale
Shape: float32[2048]
Logical: PartitionSpec('norm',)
Physical: (None,)
I0419 03:50:49.900769 134836086728512 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)
I0419 03:50:49.900825 134836086728512 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)
I0419 03:50:49.900886 134836086728512 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')
I0419 03:50:49.900940 134836086728512 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)
I0419 03:50:49.900981 134836086728512 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)
I0419 03:50:49.901036 134836086728512 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)
I0419 03:50:49.901097 134836086728512 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')
I0419 03:50:49.901142 134836086728512 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)
I0419 03:50:49.901181 134836086728512 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)
I0419 03:50:49.901231 134836086728512 maxtext_utils.py:1740] params/params/decoder/logits_dense/kernel
Shape: float32[2048,32000]
Logical: PartitionSpec('embed', 'vocab')
Physical: ('fsdp', None)
I0419 03:50:49.901296 134836086728512 maxtext_utils.py:1740] params/params/token_embedder/embedding
Shape: float32[32000,2048]
Logical: PartitionSpec('vocab', 'embed')
Physical: (None, 'fsdp')
I0419 03:50:50.410981 134836086728512 train.py:158] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0419 03:50:50.411081 134836086728512 train.py:158] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0419 03:50:50.426031 134836086728512 train.py:165] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0419 03:50:50.426097 134836086728512 train.py:165] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0419 03:51:01.155465 134836086728512 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.
I0419 03:51:01.156401 134836086728512 metric_logger.py:289] number parameters: 1.104 billion
I0419 03:51:12.382676 134836086728512 checkpointing.py:794] Waiting for step 0 to finish before checkpoint...
I0419 03:51:12.538874 134836086728512 checkpointing.py:798] Waited 0.15618157386779785 seconds for step 0 to finish before starting checkpointing.
I0419 03:51:12.541443 134836086728512 checkpoint_manager.py:2013] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0419 03:51:12.543156 134836086728512 checkpoint_manager.py:1518] [process=3] Saving checkpoint at step 0
I0419 03:51:12.545981 134836086728512 async_checkpointer.py:452] [process=3] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_true/checkpoints/0.
I0419 03:51:14.405256 134836086728512 signaling_client.py:364] Using JaxDistributedSignalingClient
I0419 03:51:14.406456 134836086728512 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array.
I0419 03:51:14.406513 134836086728512 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 03:51:14.653749 134836086728512 base_pytree_checkpoint_handler.py:153] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.248590s
I0419 03:51:14.653927 134836086728512 base_pytree_checkpoint_handler.py:129] [process=3] /jax/checkpoint/write/blocking_gbytes_per_sec: 1.122 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 1.374333143234253 s) (per-host)
I0419 03:51:14.653981 134836086728512 base_pytree_checkpoint_handler.py:737] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 1.374399s (batch_requests_ready=1.122204s, total_serialization_initiated=0.252121s, others=0.000073s)
I0419 03:51:14.654073 134836086728512 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.378740s (all_items=0.000021s, per_item={'items': '0.00002074'}, temp_paths=1.378719)
I0419 03:51:14.655030 134709969270528 async_checkpointer.py:79] [process=3][thread=async_save] Background save thread started.
I0419 03:51:14.655157 134836086728512 async_checkpointer.py:561] Finished blocking save. Time taken: 2.111934s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_true/checkpoints/0.
I0419 03:51:14.657044 134836086728512 checkpoint_manager.py:1566] [process=3][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0419 03:51:14.657328 134708880987904 async_checkpointer.py:265] [process=3][thread=save_finalize] Waiting for background save thread=async_save.
I0419 03:51:14.657456 134836086728512 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776570672.541424, 'wait_for_prev_duration_secs': 6.556510925292969e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776570672.5431938, 'checkpointer_blocking_duration_secs': 2.112154722213745, 'get_old_steps_start_time': 1776570674.6553705, 'get_old_steps_duration_secs': 2.5510787963867188e-05, 'checkpoint_manager_blocking_start_time': 1776570672.539448, 'checkpoint_manager_blocking_duration_secs': 2.1179726123809814}
I0419 03:51:14.657611 134836086728512 checkpointing.py:409] Started an asynchronous checkpoint save for step 0
I0419 03:51:14.657663 134836086728512 max_utils.py:750]
Memstats: After params initialized:
I0419 03:51:14.657710 134836086728512 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_10(process=3,(2,2,0,0))
I0419 03:51:14.657752 134836086728512 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_11(process=3,(3,2,0,0))
I0419 03:51:14.657798 134836086728512 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_14(process=3,(2,3,0,0))
I0419 03:51:14.657829 134836086728512 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_15(process=3,(3,3,0,0))
I0419 03:51:14.926610 134836086728512 metric_logger.py:185] completed step: 0, seconds: 11.226, TFLOP/s/device: 1.210, Tokens/s/device: 182.431, total_weights: 65536, loss: 10.874
I0419 03:51:15.096338 134836086728512 metric_logger.py:185] completed step: 1, seconds: 2.543, TFLOP/s/device: 5.344, Tokens/s/device: 805.464, total_weights: 65536, loss: 10.874
I0419 03:51:15.480356 134836086728512 metric_logger.py:185] completed step: 2, seconds: 0.022, TFLOP/s/device: 609.808, Tokens/s/device: 91916.880, total_weights: 65536, loss: 10.263
I0419 03:51:15.627872 134836086728512 metric_logger.py:185] completed step: 3, seconds: 0.385, TFLOP/s/device: 35.325, Tokens/s/device: 5324.639, total_weights: 65536, loss: 9.734
I0419 03:51:15.923479 134836086728512 metric_logger.py:185] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.981, Tokens/s/device: 13412.182, total_weights: 65536, loss: 9.278
I0419 03:51:15.929046 134836086728512 metric_logger.py:185] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.283, Tokens/s/device: 13909.925, total_weights: 65536, loss: 8.892
I0419 03:51:36.012896 134836086728512 metric_logger.py:185] completed step: 6, seconds: 0.296, TFLOP/s/device: 45.879, Tokens/s/device: 6915.368, total_weights: 65536, loss: 8.592
I0419 03:51:36.160397 134836086728512 metric_logger.py:185] completed step: 7, seconds: 19.937, TFLOP/s/device: 0.682, Tokens/s/device: 102.723, total_weights: 65536, loss: 8.384
I0419 03:51:36.307907 134836086728512 metric_logger.py:185] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.297, Tokens/s/device: 13459.870, total_weights: 65536, loss: 8.255
I0419 03:51:36.455034 134836086728512 checkpointing.py:794] Waiting for step 9 to finish before checkpoint...
I0419 03:51:36.455682 134836086728512 checkpointing.py:798] Waited 0.000667572021484375 seconds for step 9 to finish before starting checkpointing.
I0419 03:51:36.457826 134836086728512 checkpoint_manager.py:2024] [process=3][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0419 03:51:37.094048 2627 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0419 03:51:38.973000 134713679255296 array_metadata_store.py:203] [process=3][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_true/checkpoints/0/items/array_metadatas/process_3
I0419 03:52:10.604474 134709969270528 base_pytree_checkpoint_handler.py:129] [process=3] /jax/checkpoint/write/gbytes_per_sec: 27.555 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 57.32485246658325 s) (per-host)
I0419 03:52:10.604576 134709969270528 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 55.949339s.
I0419 03:52:19.301436 134709969270528 async_checkpointer.py:144] [process=3][thread=async_save] Background save thread done. Time taken: 64.646183s.
I0419 03:52:19.301719 134708880987904 async_checkpointer.py:273] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save.
I0419 03:52:19.301860 134708880987904 async_checkpointer.py:283] [process=3][thread=save_finalize] No errors found in background save thread=async_save.
I0419 03:52:19.301914 134708880987904 checkpoint_manager.py:2133] [process=3][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0419 03:52:19.303280 134708880987904 checkpoint_manager.py:2142] [process=3][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0419 03:52:19.303467 134836086728512 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 03:52:19.303599 134836086728512 checkpoint_manager.py:1458] Waiting for previous save to complete took 42.845778 seconds. If this number is high, consider checkpointing less frequently.
I0419 03:52:19.305454 134836086728512 checkpoint_manager.py:1518] [process=3] Saving checkpoint at step 9
I0419 03:52:19.309059 134836086728512 async_checkpointer.py:452] [process=3] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_true/checkpoints/9.
I0419 03:52:20.718133 134836086728512 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array.
I0419 03:52:20.718248 134836086728512 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 03:52:20.762767 134836086728512 base_pytree_checkpoint_handler.py:153] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.045908s
I0419 03:52:20.762947 134836086728512 base_pytree_checkpoint_handler.py:129] [process=3] /jax/checkpoint/write/blocking_gbytes_per_sec: 5.177 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.29795312881469727 s) (per-host)
I0419 03:52:20.763002 134836086728512 base_pytree_checkpoint_handler.py:737] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.298018s (batch_requests_ready=0.250179s, total_serialization_initiated=0.047765s, others=0.000074s)
I0419 03:52:20.763092 134836086728512 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.302297s (all_items=0.000015s, per_item={'items': '0.00001526'}, temp_paths=0.302282)
I0419 03:52:20.763961 134709409466112 async_checkpointer.py:79] [process=3][thread=async_save] Background save thread started.
I0419 03:52:20.764117 134836086728512 async_checkpointer.py:561] Finished blocking save. Time taken: 1.458590s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_true/checkpoints/9.
I0419 03:52:21.206640 134836086728512 checkpoint_manager.py:1566] [process=3][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0419 03:52:21.207000 134708880987904 async_checkpointer.py:265] [process=3][thread=save_finalize] Waiting for background save thread=async_save.
I0419 03:52:21.207154 134836086728512 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776570696.457797, 'wait_for_prev_duration_secs': 42.84577798843384, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776570739.3054981, 'checkpointer_blocking_duration_secs': 1.4587254524230957, 'get_old_steps_start_time': 1776570740.7642546, 'get_old_steps_duration_secs': 2.5510787963867188e-05, 'checkpoint_manager_blocking_start_time': 1776570696.455902, 'checkpoint_manager_blocking_duration_secs': 44.751214265823364}
I0419 03:52:21.207340 134836086728512 checkpointing.py:409] Started an asynchronous checkpoint save for step 9
I0419 03:52:21.207390 134836086728512 checkpoint_manager.py:2024] [process=3][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0419 03:52:28.309001 134713679255296 array_metadata_store.py:203] [process=3][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_10_shardy_true/checkpoints/9/items/array_metadatas/process_3
I0419 03:53:04.456660 134709409466112 base_pytree_checkpoint_handler.py:129] [process=3] /jax/checkpoint/write/gbytes_per_sec: 35.907 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 43.99162697792053 s) (per-host)
I0419 03:53:04.456782 134709409466112 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 43.692709s.
I0419 03:53:12.765114 134709409466112 async_checkpointer.py:144] [process=3][thread=async_save] Background save thread done. Time taken: 52.001016s.
I0419 03:53:12.765453 134708880987904 async_checkpointer.py:273] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save.
I0419 03:53:12.765570 134708880987904 async_checkpointer.py:283] [process=3][thread=save_finalize] No errors found in background save thread=async_save.
I0419 03:53:12.765618 134708880987904 checkpoint_manager.py:2133] [process=3][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0419 03:53:12.767254 134708880987904 checkpoint_manager.py:2142] [process=3][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0419 03:53:12.767433 134836086728512 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 03:53:12.767586 134836086728512 checkpoint_manager.py:2013] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0419 03:53:12.768224 134836086728512 metric_logger.py:185] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.291, Tokens/s/device: 13911.059, total_weights: 65536, loss: 8.179
Per train step:
Total TFLOPs: 13.59
split as 93.93% learnable weight flops and 6.07% attention flops
XPK End: Sun Apr 19 03:53:24 UTC 2026
EXIT_CODE=0