XPK Start: Sat Apr 25 15:06:23 UTC 2026
2026-04-25 15:06:27.186983: 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 00:00:1777129587.200267 10 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered
E0000 00:00:1777129587.203980 10 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered
W0000 00:00:1777129587.215277 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1777129587.215295 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1777129587.215297 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1777129587.215299 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
2026-04-25 15:06:46.397090: 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)
I0425 15:06:46.921764 137147910256448 max_utils.py:273] Attempting to initialize the jax distributed system...
INFO:2026-04-25 15:06:55,962:jax._src.distributed:140: Starting JAX distributed service on [::]:8482
I0425 15:06:55.962944 137147910256448 distributed.py:140] Starting JAX distributed service on [::]:8482
INFO:2026-04-25 15:06:55,965:jax._src.distributed:157: Connecting to JAX distributed service on mt-02-synthetic-kw3li-slice-job-0-0.mt-02-synthetic-kw3li:8482
I0425 15:06:55.965203 137147910256448 distributed.py:157] Connecting to JAX distributed service on mt-02-synthetic-kw3li-slice-job-0-0.mt-02-synthetic-kw3li:8482
I0425 15:06:57.351317 137147910256448 max_utils.py:284] Jax distributed system initialized!
I0425 15:07:04.437217 137147910256448 max_utils.py:800] System Information: Jax Version: 0.8.1
I0425 15:07:04.437328 137147910256448 max_utils.py:801] System Information: Jaxlib Version: 0.8.1
I0425 15:07:04.437370 137147910256448 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
I0425 15:07:04.437403 137147910256448 train_utils.py:377] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0425 15:07:05.064393 137147910256448 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0425 15:07:05.064999 137147910256448 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0425 15:07:05.065185 137147910256448 checkpointing.py:688] Setting up checkpoint logger...
I0425 15:07:05.065236 137147910256448 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True
I0425 15:07:05.065279 137147910256448 pytree_checkpoint_handler.py:589] save_device_host_concurrent_bytes=None
I0425 15:07:05.065626 137147910256448 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 0x7cbbb8157980>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0425 15:07:07.972759 137147910256448 checkpointing.py:266] Enabling policy for fixed interval checkpointing.
I0425 15:07:07.973009 137147910256448 checkpoint_manager.py:709] [process=5][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ca754409580>}, handler_registry=None
I0425 15:07:07.973242 137147910256448 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ca754409580>` 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`.
I0425 15:07:07.973290 137147910256448 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ca75440c050>` 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`.
I0425 15:07:07.973326 137147910256448 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 0x7ca754409580>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ca754409580>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ca75440c050>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ca75440c050>}).
I0425 15:07:07.973839 137147910256448 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.33
I0425 15:07:07.973918 137147910256448 async_checkpointer.py:177] [process=5][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7ca754364180> timeout: 600 secs and primary_host=0 for async checkpoint writes
I0425 15:07:08.682503 137147910256448 checkpoint_manager.py:1818] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_02_synthetic/checkpoints
I0425 15:07:08.933713 137147910256448 checkpoint_manager.py:929] [process=5][thread=MainThread] CheckpointManager created, primary_host=0, CheckpointManagerOptions=CheckpointManagerOptions(save_interval_steps=1, max_to_keep=None, keep_time_interval=None, keep_period=None, should_keep_fn=None, best_fn=None, best_mode='max', keep_checkpoints_without_metrics=True, step_prefix=None, step_format_fixed_length=None, step_name_format=None, create=True, cleanup_tmp_directories=False, save_on_steps=frozenset(), single_host_load_and_broadcast=False, todelete_subdir=None, todelete_full_path=None, enable_background_delete=False, read_only=False, enable_async_checkpointing=True, async_options=None, multiprocessing_options=MultiprocessingOptions(primary_host=0, active_processes=None, barrier_sync_key_prefix=None), should_save_fn=None, file_options=FileOptions(path_permission_mode=None), save_root_metadata=True, temporary_path_class=None, save_decision_policy=FixedIntervalPolicy(interval=10), preservation_policy=LatestN(n=None), prevent_write_metrics=False, enable_should_save_is_saving_in_progress_check=True, enable_per_process_directory_creation=False, lightweight_initialize=False), root_directory=gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_02_synthetic/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7cba77421670>
I0425 15:07:08.933892 137147910256448 checkpointing.py:302] Checkpoint manager created!
I0425 15:07:09.831996 137147910256448 nnx_wrappers.py:455] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0425 15:07:09.832101 137147910256448 nnx_wrappers.py:455] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0425 15:07:10.201573 137147910256448 attentions.py:1084] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0425 15:07:10.201680 137147910256448 attentions.py:1084] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0425 15:07:10.217608 137147910256448 attentions.py:1085] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0425 15:07:10.217681 137147910256448 attentions.py:1085] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0425 15:07:10.240712 137147910256448 attentions.py:1150] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 15:07:10.240780 137147910256448 attentions.py:1150] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 15:07:10.256735 137147910256448 attentions.py:1151] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 15:07:10.256796 137147910256448 attentions.py:1151] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 15:07:10.272556 137147910256448 attentions.py:1152] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 15:07:10.272621 137147910256448 attentions.py:1152] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 15:07:10.297439 137147910256448 attentions.py:1193] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0425 15:07:10.297511 137147910256448 attentions.py:1193] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 15:07:10.317142 137147910256448 linears.py:541] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0425 15:07:10.317203 137147910256448 linears.py:541] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0425 15:07:10.506239 137147910256448 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint
I0425 15:07:10.506350 137147910256448 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0425 15:07:11.936711 137147910256448 maxtext_utils.py:1740] params/params/decoder/decoder_norm/scale
Shape: float32[2048]
Logical: PartitionSpec('norm',)
Physical: (None,)
I0425 15:07:11.936846 137147910256448 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)
I0425 15:07:11.936901 137147910256448 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)
I0425 15:07:11.936958 137147910256448 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')
I0425 15:07:11.937012 137147910256448 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)
I0425 15:07:11.937050 137147910256448 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)
I0425 15:07:11.937103 137147910256448 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)
I0425 15:07:11.937155 137147910256448 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')
I0425 15:07:11.937195 137147910256448 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)
I0425 15:07:11.937232 137147910256448 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)
I0425 15:07:11.937287 137147910256448 maxtext_utils.py:1740] params/params/decoder/logits_dense/kernel
Shape: float32[2048,32000]
Logical: PartitionSpec('embed', 'vocab')
Physical: ('fsdp', None)
I0425 15:07:11.937334 137147910256448 maxtext_utils.py:1740] params/params/token_embedder/embedding
Shape: float32[32000,2048]
Logical: PartitionSpec('vocab', 'embed')
Physical: (None, 'fsdp')
I0425 15:07:12.440757 137147910256448 train.py:158] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0425 15:07:12.440851 137147910256448 train.py:158] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0425 15:07:12.455739 137147910256448 train.py:165] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0425 15:07:12.455802 137147910256448 train.py:165] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0425 15:07:23.376629 137147910256448 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.
I0425 15:07:23.377515 137147910256448 metric_logger.py:289] number parameters: 1.104 billion
I0425 15:07:34.527019 137147910256448 checkpointing.py:794] Waiting for step 0 to finish before checkpoint...
I0425 15:07:34.681099 137147910256448 checkpointing.py:798] Waited 0.15406584739685059 seconds for step 0 to finish before starting checkpointing.
I0425 15:07:34.683631 137147910256448 checkpoint_manager.py:2013] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0425 15:07:34.685454 137147910256448 checkpoint_manager.py:1518] [process=5] Saving checkpoint at step 0
I0425 15:07:34.688289 137147910256448 async_checkpointer.py:452] [process=5] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_02_synthetic/checkpoints/0.
I0425 15:07:35.291399 137147910256448 signaling_client.py:364] Using JaxDistributedSignalingClient
I0425 15:07:35.292456 137147910256448 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array.
I0425 15:07:35.292513 137147910256448 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
I0425 15:07:35.540636 137147910256448 base_pytree_checkpoint_handler.py:153] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.249320s
I0425 15:07:35.540815 137147910256448 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.893 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.5331227779388428 s) (per-host)
I0425 15:07:35.540867 137147910256448 base_pytree_checkpoint_handler.py:737] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.533183s (batch_requests_ready=0.280216s, total_serialization_initiated=0.252899s, others=0.000068s)
I0425 15:07:35.540960 137147910256448 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.537196s (all_items=0.000019s, per_item={'items': '0.00001884'}, temp_paths=0.537177)
I0425 15:07:35.541949 137021704091392 async_checkpointer.py:79] [process=5][thread=async_save] Background save thread started.
I0425 15:07:35.542080 137147910256448 async_checkpointer.py:561] Finished blocking save. Time taken: 0.856555s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_02_synthetic/checkpoints/0.
I0425 15:07:35.557090 137147910256448 checkpoint_manager.py:1566] [process=5][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0425 15:07:35.557344 137020118656768 async_checkpointer.py:265] [process=5][thread=save_finalize] Waiting for background save thread=async_save.
I0425 15:07:35.557476 137147910256448 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_02_synthetic/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777129654.6836133, 'wait_for_prev_duration_secs': 7.605552673339844e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777129654.685492, 'checkpointer_blocking_duration_secs': 0.8567681312561035, 'get_old_steps_start_time': 1777129655.5422804, 'get_old_steps_duration_secs': 2.5272369384765625e-05, 'checkpoint_manager_blocking_start_time': 1777129654.6816964, 'checkpoint_manager_blocking_duration_secs': 0.875739574432373}
I0425 15:07:35.557580 137147910256448 checkpointing.py:409] Started an asynchronous checkpoint save for step 0
I0425 15:07:35.557631 137147910256448 max_utils.py:750]
Memstats: After params initialized:
I0425 15:07:35.557693 137147910256448 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_18(process=5,(2,4,0,0))
I0425 15:07:35.557730 137147910256448 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_19(process=5,(3,4,0,0))
I0425 15:07:35.557759 137147910256448 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_22(process=5,(2,5,0,0))
I0425 15:07:35.557783 137147910256448 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_23(process=5,(3,5,0,0))
I0425 15:07:35.827473 137147910256448 metric_logger.py:185] completed step: 0, seconds: 11.149, TFLOP/s/device: 1.219, Tokens/s/device: 183.687, total_weights: 65536, loss: 10.874
I0425 15:07:35.999191 137147910256448 metric_logger.py:185] completed step: 1, seconds: 1.299, TFLOP/s/device: 10.459, Tokens/s/device: 1576.432, total_weights: 65536, loss: 10.874
I0425 15:07:36.417779 137147910256448 metric_logger.py:185] completed step: 2, seconds: 0.025, TFLOP/s/device: 554.260, Tokens/s/device: 83544.097, total_weights: 65536, loss: 10.263
I0425 15:07:36.565278 137147910256448 metric_logger.py:185] completed step: 3, seconds: 0.419, TFLOP/s/device: 32.443, Tokens/s/device: 4890.151, total_weights: 65536, loss: 9.734
I0425 15:07:36.860735 137147910256448 metric_logger.py:185] completed step: 4, seconds: 0.153, TFLOP/s/device: 89.014, Tokens/s/device: 13417.103, total_weights: 65536, loss: 9.278
I0425 15:07:36.866197 137147910256448 metric_logger.py:185] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.132, Tokens/s/device: 13887.100, total_weights: 65536, loss: 8.892
I0425 15:07:55.645562 137147910256448 metric_logger.py:185] completed step: 6, seconds: 0.296, TFLOP/s/device: 45.919, Tokens/s/device: 6921.444, total_weights: 65536, loss: 8.592
I0425 15:07:55.793209 137147910256448 metric_logger.py:185] completed step: 7, seconds: 18.633, TFLOP/s/device: 0.729, Tokens/s/device: 109.915, total_weights: 65536, loss: 8.384
I0425 15:07:55.940551 137147910256448 metric_logger.py:185] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.304, Tokens/s/device: 13460.932, total_weights: 65536, loss: 8.255
I0425 15:07:56.087723 137147910256448 checkpointing.py:794] Waiting for step 9 to finish before checkpoint...
I0425 15:07:56.088347 137147910256448 checkpointing.py:798] Waited 0.0006458759307861328 seconds for step 9 to finish before starting checkpointing.
I0425 15:07:56.090370 137147910256448 checkpoint_manager.py:2024] [process=5][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0425 15:07:56.746925 2688 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0425 15:07:58.624454 137021712484096 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_02_synthetic/checkpoints/0/items/array_metadatas/process_5
I0425 15:08:31.597619 137021704091392 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/gbytes_per_sec: 27.913 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 56.58988308906555 s) (per-host)
I0425 15:08:31.597753 137021704091392 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 56.055593s.
I0425 15:08:39.107192 137021704091392 async_checkpointer.py:144] [process=5][thread=async_save] Background save thread done. Time taken: 63.565016s.
I0425 15:08:39.107508 137020118656768 async_checkpointer.py:273] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save.
I0425 15:08:39.107648 137020118656768 async_checkpointer.py:283] [process=5][thread=save_finalize] No errors found in background save thread=async_save.
I0425 15:08:39.107719 137020118656768 checkpoint_manager.py:2133] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0425 15:08:39.109314 137020118656768 checkpoint_manager.py:2142] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0425 15:08:39.109504 137147910256448 checkpoint_manager.py:2036] [process=5][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0425 15:08:39.109648 137147910256448 checkpoint_manager.py:1458] Waiting for previous save to complete took 43.019283 seconds. If this number is high, consider checkpointing less frequently.
I0425 15:08:39.111579 137147910256448 checkpoint_manager.py:1518] [process=5] Saving checkpoint at step 9
I0425 15:08:39.115012 137147910256448 async_checkpointer.py:452] [process=5] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_02_synthetic/checkpoints/9.
I0425 15:08:39.638712 137147910256448 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array.
I0425 15:08:39.638810 137147910256448 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
I0425 15:08:39.685105 137147910256448 base_pytree_checkpoint_handler.py:153] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.047761s
I0425 15:08:39.685253 137147910256448 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/blocking_gbytes_per_sec: 5.235 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.29465413093566895 s) (per-host)
I0425 15:08:39.685302 137147910256448 base_pytree_checkpoint_handler.py:737] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.294712s (batch_requests_ready=0.245059s, total_serialization_initiated=0.049589s, others=0.000065s)
I0425 15:08:39.685384 137147910256448 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.298660s (all_items=0.000016s, per_item={'items': '0.00001597'}, temp_paths=0.298644)
I0425 15:08:39.686317 137020663920384 async_checkpointer.py:79] [process=5][thread=async_save] Background save thread started.
I0425 15:08:39.686474 137147910256448 async_checkpointer.py:561] Finished blocking save. Time taken: 0.574821s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_02_synthetic/checkpoints/9.
I0425 15:08:39.708969 137147910256448 checkpoint_manager.py:1566] [process=5][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0425 15:08:39.709265 137020118656768 async_checkpointer.py:265] [process=5][thread=save_finalize] Waiting for background save thread=async_save.
I0425 15:08:39.709430 137147910256448 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_02_synthetic/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777129676.0903401, 'wait_for_prev_duration_secs': 43.019282817840576, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777129719.1116207, 'checkpointer_blocking_duration_secs': 0.5749621391296387, 'get_old_steps_start_time': 1777129719.6866016, 'get_old_steps_duration_secs': 2.6702880859375e-05, 'checkpoint_manager_blocking_start_time': 1777129676.0885725, 'checkpoint_manager_blocking_duration_secs': 43.620821952819824}
I0425 15:08:39.709538 137147910256448 checkpointing.py:409] Started an asynchronous checkpoint save for step 9
I0425 15:08:39.709585 137147910256448 checkpoint_manager.py:2024] [process=5][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0425 15:08:44.738879 137021712484096 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_02_synthetic/checkpoints/9/items/array_metadatas/process_5
I0425 15:09:21.465130 137020663920384 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/gbytes_per_sec: 37.543 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.074488401412964 s) (per-host)
I0425 15:09:21.465248 137020663920384 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.778823s.
I0425 15:09:28.472563 137020663920384 async_checkpointer.py:144] [process=5][thread=async_save] Background save thread done. Time taken: 48.786124s.
I0425 15:09:28.472859 137020118656768 async_checkpointer.py:273] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save.
I0425 15:09:28.472976 137020118656768 async_checkpointer.py:283] [process=5][thread=save_finalize] No errors found in background save thread=async_save.
I0425 15:09:28.473033 137020118656768 checkpoint_manager.py:2133] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0425 15:09:28.474473 137020118656768 checkpoint_manager.py:2142] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0425 15:09:28.474683 137147910256448 checkpoint_manager.py:2036] [process=5][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0425 15:09:28.474829 137147910256448 checkpoint_manager.py:2013] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0425 15:09:28.475526 137147910256448 metric_logger.py:185] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.136, Tokens/s/device: 13887.759, 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: Sat Apr 25 15:09:39 UTC 2026
EXIT_CODE=0