XPK Start: Sat Apr 25 16:10:50 UTC 2026 2026-04-25 16:10:54.112589: 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 00:00:1777133454.125433 10 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered E0000 00:00:1777133454.129175 10 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered W0000 00:00:1777133454.141120 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1777133454.141141 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1777133454.141143 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1777133454.141145 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. 2026-04-25 16:11:13.317729: 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 16:11:13.847251 138064362866496 max_utils.py:273] Attempting to initialize the jax distributed system... INFO:2026-04-25 16:11:22,890:jax._src.distributed:140: Starting JAX distributed service on [::]:8482 I0425 16:11:22.890672 138064362866496 distributed.py:140] Starting JAX distributed service on [::]:8482 INFO:2026-04-25 16:11:22,893:jax._src.distributed:157: Connecting to JAX distributed service on mt-15-ocdbt-false-rs-j3fgd-slice-job-0-0.mt-15-ocdbt-false-rs-j3fgd:8482 I0425 16:11:22.893131 138064362866496 distributed.py:157] Connecting to JAX distributed service on mt-15-ocdbt-false-rs-j3fgd-slice-job-0-0.mt-15-ocdbt-false-rs-j3fgd:8482 I0425 16:11:23.763239 138064362866496 max_utils.py:284] Jax distributed system initialized! I0425 16:11:30.713623 138064362866496 max_utils.py:800] System Information: Jax Version: 0.8.1 I0425 16:11:30.713730 138064362866496 max_utils.py:801] System Information: Jaxlib Version: 0.8.1 I0425 16:11:30.713771 138064362866496 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 16:11:30.713804 138064362866496 train_utils.py:377] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0425 16:11:31.345636 138064362866496 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0425 16:11:31.346247 138064362866496 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0425 16:11:31.346432 138064362866496 checkpointing.py:688] Setting up checkpoint logger... I0425 16:11:31.346482 138064362866496 checkpointing.py:234] Creating checkpoint manager with ocdbt=False and zarr3=True I0425 16:11:31.346524 138064362866496 pytree_checkpoint_handler.py:589] save_device_host_concurrent_bytes=None I0425 16:11:31.346915 138064362866496 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 0x7d911e775160>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0425 16:11:32.602057 138064362866496 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0425 16:11:32.602323 138064362866496 checkpoint_manager.py:709] [process=6][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d8fd46c0230>}, handler_registry=None I0425 16:11:32.602562 138064362866496 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d8fd46c0230>` 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 16:11:32.602612 138064362866496 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d7c9c1cf110>` 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 16:11:32.602648 138064362866496 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 0x7d8fd46c0230>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d8fd46c0230>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d7c9c1cf110>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d7c9c1cf110>}). I0425 16:11:32.603165 138064362866496 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.33 I0425 16:11:32.603244 138064362866496 async_checkpointer.py:177] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7d7c94780180> timeout: 600 secs and primary_host=0 for async checkpoint writes I0425 16:11:34.205673 137944375469824 checkpoint.py:228] Read Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1777133361322806965, 'commit_timestamp_nsecs': 1777133374895112559, 'custom_metadata': {}} from gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_15_ocdbt_false/checkpoints/9/_CHECKPOINT_METADATA I0425 16:11:34.450153 137944375469824 checkpoint_manager.py:1877] Missing metrics for step 9 I0425 16:11:35.051209 138064362866496 checkpoint_manager.py:1818] Found 3 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_15_ocdbt_false/checkpoints I0425 16:11:35.114860 138064362866496 checkpoint_manager.py:929] [process=6][thread=MainThread] CheckpointManager created, primary_host=0, CheckpointManagerOptions=CheckpointManagerOptions(save_interval_steps=1, max_to_keep=None, keep_time_interval=None, keep_period=None, should_keep_fn=None, best_fn=None, best_mode='max', keep_checkpoints_without_metrics=True, step_prefix=None, step_format_fixed_length=None, step_name_format=None, create=True, cleanup_tmp_directories=False, save_on_steps=frozenset(), single_host_load_and_broadcast=False, todelete_subdir=None, todelete_full_path=None, enable_background_delete=False, read_only=False, enable_async_checkpointing=True, async_options=None, multiprocessing_options=MultiprocessingOptions(primary_host=0, active_processes=None, barrier_sync_key_prefix=None), should_save_fn=None, file_options=FileOptions(path_permission_mode=None), save_root_metadata=True, temporary_path_class=None, save_decision_policy=FixedIntervalPolicy(interval=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_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_15_ocdbt_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7d8fd4765730> I0425 16:11:35.115026 138064362866496 checkpointing.py:302] Checkpoint manager created! I0425 16:11:36.036325 138064362866496 nnx_wrappers.py:455] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0425 16:11:36.036431 138064362866496 nnx_wrappers.py:455] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0425 16:11:36.403124 138064362866496 attentions.py:1084] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0425 16:11:36.403217 138064362866496 attentions.py:1084] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0425 16:11:36.419022 138064362866496 attentions.py:1085] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0425 16:11:36.419085 138064362866496 attentions.py:1085] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0425 16:11:36.443983 138064362866496 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 16:11:36.444053 138064362866496 attentions.py:1150] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 16:11:36.460070 138064362866496 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 16:11:36.460143 138064362866496 attentions.py:1151] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 16:11:36.475986 138064362866496 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 16:11:36.476050 138064362866496 attentions.py:1152] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 16:11:36.500846 138064362866496 attentions.py:1193] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0425 16:11:36.500921 138064362866496 attentions.py:1193] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0425 16:11:36.520511 138064362866496 linears.py:541] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0425 16:11:36.520583 138064362866496 linears.py:541] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0425 16:11:36.711186 138064362866496 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0425 16:11:36.711310 138064362866496 checkpointing.py:582] restoring from this run's directory step 9 I0425 16:11:37.198520 138064362866496 checkpointer.py:304] Restoring checkpoint from gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_15_ocdbt_false/checkpoints/9. I0425 16:11:39.756237 1445 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0425 16:11:48.886213 138064362866496 jax_array_handlers.py:837] [process=6] /jax/orbax/read/worker/io/requested throughput: 155.442 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 10.16631269454956 s) (per-host) I0425 16:11:48.893704 138064362866496 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/read/gbytes_per_sec: 149.669 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 10.573952674865723 s) (per-host) I0425 16:11:49.930449 138064362866496 checkpointer.py:318] Finished restoring checkpoint in 12.96 seconds from gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_15_ocdbt_false/checkpoints/9. I0425 16:11:49.930629 138064362866496 standard_logger.py:34] {'step': 9, 'event_type': 'restore', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_15_ocdbt_false/checkpoints', 'checkpointer_start_time': 1777133496.9668987, 'checkpointer_duration_secs': 12.963698387145996, 'checkpoint_manager_start_time': 1777133496.711575, 'checkpoint_manager_duration_secs': 13.219023942947388} fsdp: 32 I0425 16:11:50.332456 138064362866496 maxtext_utils.py:1740] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: PartitionSpec('norm',) Physical: (None,) I0425 16:11:50.332590 138064362866496 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 16:11:50.332645 138064362866496 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 16:11:50.332707 138064362866496 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 16:11:50.332762 138064362866496 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 16:11:50.332803 138064362866496 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 16:11:50.332858 138064362866496 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 16:11:50.332911 138064362866496 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 16:11:50.332952 138064362866496 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 16:11:50.332991 138064362866496 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 16:11:50.333041 138064362866496 maxtext_utils.py:1740] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: PartitionSpec('embed', 'vocab') Physical: ('fsdp', None) I0425 16:11:50.333088 138064362866496 maxtext_utils.py:1740] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: PartitionSpec('vocab', 'embed') Physical: (None, 'fsdp') I0425 16:11:50.827731 138064362866496 train.py:158] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0425 16:11:50.827830 138064362866496 train.py:158] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0425 16:11:50.843129 138064362866496 train.py:165] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0425 16:11:50.843190 138064362866496 train.py:165] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0425 16:12:01.704749 138064362866496 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 16:12:01.705687 138064362866496 metric_logger.py:289] number parameters: 1.104 billion I0425 16:12:12.979396 138064362866496 checkpointing.py:794] Waiting for step 10 to finish before checkpoint... I0425 16:12:13.133602 138064362866496 checkpointing.py:798] Waited 0.15418791770935059 seconds for step 10 to finish before starting checkpointing. I0425 16:12:13.136049 138064362866496 checkpoint_manager.py:2013] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0425 16:12:13.137854 138064362866496 checkpoint_manager.py:1518] [process=6] Saving checkpoint at step 10 I0425 16:12:13.141087 138064362866496 async_checkpointer.py:452] [process=6] 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_15_ocdbt_false/checkpoints/10. I0425 16:12:13.718774 138064362866496 signaling_client.py:364] Using JaxDistributedSignalingClient I0425 16:12:13.719984 138064362866496 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array. I0425 16:12:13.720044 138064362866496 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 16:12:13.972460 138064362866496 base_pytree_checkpoint_handler.py:153] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.253779s I0425 16:12:13.972627 138064362866496 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/blocking_gbytes_per_sec: 3.134 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.49222397804260254 s) (per-host) I0425 16:12:13.972683 138064362866496 base_pytree_checkpoint_handler.py:737] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.492290s (batch_requests_ready=0.236401s, total_serialization_initiated=0.255816s, others=0.000074s) I0425 16:12:13.972771 138064362866496 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.496910s (all_items=0.000028s, per_item={'items': '0.00002813'}, temp_paths=0.496882) I0425 16:12:13.973637 137942152484608 async_checkpointer.py:79] [process=6][thread=async_save] Background save thread started. I0425 16:12:13.973812 138064362866496 async_checkpointer.py:561] Finished blocking save. Time taken: 0.835884s. 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_15_ocdbt_false/checkpoints/10. I0425 16:12:14.013115 138064362866496 checkpoint_manager.py:1566] [process=6][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize I0425 16:12:14.013417 137939518486272 async_checkpointer.py:265] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0425 16:12:14.013553 138064362866496 standard_logger.py:34] {'step': 10, '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_15_ocdbt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777133533.13603, 'wait_for_prev_duration_secs': 8.082389831542969e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777133533.1378932, 'checkpointer_blocking_duration_secs': 0.8360309600830078, 'get_old_steps_start_time': 1777133533.973943, 'get_old_steps_duration_secs': 2.7418136596679688e-05, 'checkpoint_manager_blocking_start_time': 1777133533.1341312, 'checkpoint_manager_blocking_duration_secs': 0.8793857097625732} I0425 16:12:14.013661 138064362866496 checkpointing.py:409] Started an asynchronous checkpoint save for step 10 I0425 16:12:14.013712 138064362866496 max_utils.py:750] Memstats: After params initialized: I0425 16:12:14.013764 138064362866496 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0)) I0425 16:12:14.013796 138064362866496 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0)) I0425 16:12:14.013823 138064362866496 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0)) I0425 16:12:14.013846 138064362866496 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0)) I0425 16:12:14.279701 138064362866496 metric_logger.py:185] completed step: 10, seconds: 11.274, TFLOP/s/device: 1.205, Tokens/s/device: 181.664, total_weights: 65536, loss: 6.833 I0425 16:12:14.447382 138064362866496 metric_logger.py:185] completed step: 11, seconds: 1.299, TFLOP/s/device: 10.460, Tokens/s/device: 1576.601, total_weights: 65536, loss: 6.528 I0425 16:12:14.595057 138064362866496 metric_logger.py:185] completed step: 12, seconds: 0.020, TFLOP/s/device: 665.351, Tokens/s/device: 100288.918, total_weights: 65536, loss: 6.265 I0425 16:12:14.742617 138064362866496 metric_logger.py:185] completed step: 13, seconds: 0.153, TFLOP/s/device: 88.682, Tokens/s/device: 13367.099, total_weights: 65536, loss: 6.045 I0425 16:12:14.747393 138064362866496 checkpointing.py:794] Waiting for step 15 to finish before checkpoint... I0425 16:12:15.037179 138064362866496 checkpointing.py:798] Waited 0.28975629806518555 seconds for step 15 to finish before starting checkpointing. I0425 16:12:15.040159 138064362866496 checkpoint_manager.py:2024] [process=6][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0425 16:12:19.053679 137940013393664 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_15_ocdbt_false/checkpoints/10/items/array_metadatas/process_6 I0425 16:12:24.357912 137942152484608 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/gbytes_per_sec: 145.217 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 10.877471685409546 s) (per-host) I0425 16:12:24.358021 137942152484608 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 10.384271s. I0425 16:12:30.589108 137942152484608 async_checkpointer.py:144] [process=6][thread=async_save] Background save thread done. Time taken: 16.615325s. I0425 16:12:30.589389 137939518486272 async_checkpointer.py:273] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0425 16:12:30.589510 137939518486272 async_checkpointer.py:283] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0425 16:12:30.589557 137939518486272 checkpoint_manager.py:2133] [process=6][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts... I0425 16:12:30.591813 137939518486272 checkpoint_manager.py:2142] [process=6][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts. I0425 16:12:30.591982 138064362866496 checkpoint_manager.py:2036] [process=6][thread=MainThread][step=10][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=10. W0425 16:12:30.592135 138064362866496 checkpoint_manager.py:1458] Waiting for previous save to complete took 15.551980 seconds. If this number is high, consider checkpointing less frequently. I0425 16:12:30.594147 138064362866496 checkpoint_manager.py:1518] [process=6] Saving checkpoint at step 15 I0425 16:12:30.598324 138064362866496 async_checkpointer.py:452] [process=6] 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_15_ocdbt_false/checkpoints/15. I0425 16:12:31.136489 138064362866496 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array. I0425 16:12:31.136589 138064362866496 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 16:12:31.182880 138064362866496 base_pytree_checkpoint_handler.py:153] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.047590s I0425 16:12:31.183043 138064362866496 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/blocking_gbytes_per_sec: 5.059 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.3049020767211914 s) (per-host) I0425 16:12:31.183108 138064362866496 base_pytree_checkpoint_handler.py:737] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.304962s (batch_requests_ready=0.255396s, total_serialization_initiated=0.049498s, others=0.000068s) I0425 16:12:31.183200 138064362866496 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.309802s (all_items=0.000014s, per_item={'items': '0.00001407'}, temp_paths=0.309788) I0425 16:12:31.184124 137937329039104 async_checkpointer.py:79] [process=6][thread=async_save] Background save thread started. I0425 16:12:31.184283 138064362866496 async_checkpointer.py:561] Finished blocking save. Time taken: 0.590064s. 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_15_ocdbt_false/checkpoints/15. I0425 16:12:31.187425 138064362866496 checkpoint_manager.py:1566] [process=6][thread=MainThread][step=15] Starting CheckpointManager Save Finalize thread=save_finalize I0425 16:12:31.187705 137939518486272 async_checkpointer.py:265] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0425 16:12:31.187870 138064362866496 standard_logger.py:34] {'step': 15, '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_15_ocdbt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777133535.040131, 'wait_for_prev_duration_secs': 15.551979541778564, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777133550.5941856, 'checkpointer_blocking_duration_secs': 0.5902047157287598, 'get_old_steps_start_time': 1777133551.18441, 'get_old_steps_duration_secs': 2.5272369384765625e-05, 'checkpoint_manager_blocking_start_time': 1777133535.0378382, 'checkpoint_manager_blocking_duration_secs': 16.14999556541443} I0425 16:12:31.187994 138064362866496 checkpointing.py:409] Started an asynchronous checkpoint save for step 15 I0425 16:12:31.188575 138064362866496 metric_logger.py:185] completed step: 14, seconds: 0.148, TFLOP/s/device: 92.003, Tokens/s/device: 13867.728, total_weights: 65536, loss: 5.864 I0425 16:12:31.194767 138064362866496 metric_logger.py:185] completed step: 15, seconds: 0.148, TFLOP/s/device: 92.064, Tokens/s/device: 13876.843, total_weights: 65536, loss: 5.719 I0425 16:12:48.722684 138064362866496 metric_logger.py:185] completed step: 16, seconds: 16.446, TFLOP/s/device: 0.826, Tokens/s/device: 124.529, total_weights: 65536, loss: 5.605 I0425 16:12:48.869979 138064362866496 metric_logger.py:185] completed step: 17, seconds: 17.382, TFLOP/s/device: 0.782, Tokens/s/device: 117.825, total_weights: 65536, loss: 5.517 I0425 16:12:49.017233 138064362866496 metric_logger.py:185] completed step: 18, seconds: 0.152, TFLOP/s/device: 89.187, Tokens/s/device: 13443.172, total_weights: 65536, loss: 5.448 I0425 16:12:49.164572 138064362866496 checkpointing.py:794] Waiting for step 19 to finish before checkpoint... I0425 16:12:49.165283 138064362866496 checkpointing.py:798] Waited 0.0007493495941162109 seconds for step 19 to finish before starting checkpointing. I0425 16:12:49.167158 138064362866496 checkpoint_manager.py:2024] [process=6][thread=MainThread][step=15][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0425 16:12:53.262337 137940013393664 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_15_ocdbt_false/checkpoints/15/items/array_metadatas/process_6 I0425 16:12:59.196411 137937329039104 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/gbytes_per_sec: 55.780 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 28.318246841430664 s) (per-host) I0425 16:12:59.196514 137937329039104 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 28.012281s. I0425 16:13:03.234215 137937329039104 async_checkpointer.py:144] [process=6][thread=async_save] Background save thread done. Time taken: 32.049967s. I0425 16:13:03.234501 137939518486272 async_checkpointer.py:273] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0425 16:13:03.234620 137939518486272 async_checkpointer.py:283] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0425 16:13:03.234668 137939518486272 checkpoint_manager.py:2133] [process=6][thread=save_finalize][step=15] CheckpointManager Save Finalize is syncing with other hosts... I0425 16:13:03.237047 137939518486272 checkpoint_manager.py:2142] [process=6][thread=save_finalize][step=15] CheckpointManager Save Finalize is done on all hosts. I0425 16:13:03.237238 138064362866496 checkpoint_manager.py:2036] [process=6][thread=MainThread][step=15][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=15. W0425 16:13:03.237360 138064362866496 checkpoint_manager.py:1458] Waiting for previous save to complete took 14.070213 seconds. If this number is high, consider checkpointing less frequently. I0425 16:13:03.238852 138064362866496 checkpoint_manager.py:1518] [process=6] Saving checkpoint at step 19 I0425 16:13:03.244805 138064362866496 async_checkpointer.py:452] [process=6] 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_15_ocdbt_false/checkpoints/19. I0425 16:13:03.900344 138064362866496 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array. I0425 16:13:03.900439 138064362866496 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 16:13:03.945919 138064362866496 base_pytree_checkpoint_handler.py:153] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.046557s I0425 16:13:03.946086 138064362866496 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/blocking_gbytes_per_sec: 4.995 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.30879974365234375 s) (per-host) I0425 16:13:03.946147 138064362866496 base_pytree_checkpoint_handler.py:737] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.308871s (batch_requests_ready=0.260101s, total_serialization_initiated=0.048694s, others=0.000076s) I0425 16:13:03.946239 138064362866496 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.312855s (all_items=0.000011s, per_item={'items': '0.00001144'}, temp_paths=0.312843) I0425 16:13:03.947140 137937371002624 async_checkpointer.py:79] [process=6][thread=async_save] Background save thread started. I0425 16:13:03.947304 138064362866496 async_checkpointer.py:561] Finished blocking save. Time taken: 0.708383s. 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_15_ocdbt_false/checkpoints/19. I0425 16:13:03.949291 138064362866496 checkpoint_manager.py:1566] [process=6][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize I0425 16:13:03.949582 137939518486272 async_checkpointer.py:265] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0425 16:13:03.949739 138064362866496 standard_logger.py:34] {'step': 19, '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_15_ocdbt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777133569.1671317, 'wait_for_prev_duration_secs': 14.070212841033936, 'time_between_consecutive_saves_sec': 18.575276613235474, 'checkpointer_blocking_start_time': 1777133583.2388904, 'checkpointer_blocking_duration_secs': 0.7085220813751221, 'get_old_steps_start_time': 1777133583.9474254, 'get_old_steps_duration_secs': 2.1457672119140625e-05, 'checkpoint_manager_blocking_start_time': 1777133569.1655087, 'checkpoint_manager_blocking_duration_secs': 14.784198522567749} I0425 16:13:03.949842 138064362866496 checkpointing.py:409] Started an asynchronous checkpoint save for step 19 I0425 16:13:03.949885 138064362866496 checkpoint_manager.py:2024] [process=6][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0425 16:13:08.953687 137940013393664 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260425_150412/linen_xpk_feat_nnx_set_defaults_true_20260425_150412_15_ocdbt_false/checkpoints/19/items/array_metadatas/process_6 I0425 16:13:14.379065 137937371002624 base_pytree_checkpoint_handler.py:129] [process=6] /jax/checkpoint/write/gbytes_per_sec: 147.052 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 10.741736888885498 s) (per-host) I0425 16:13:14.379199 137937371002624 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 10.431944s. I0425 16:13:18.575597 137937371002624 async_checkpointer.py:144] [process=6][thread=async_save] Background save thread done. Time taken: 14.628327s. I0425 16:13:18.575884 137939518486272 async_checkpointer.py:273] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0425 16:13:18.576011 137939518486272 async_checkpointer.py:283] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0425 16:13:18.576051 137939518486272 checkpoint_manager.py:2133] [process=6][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts... I0425 16:13:18.577725 137939518486272 checkpoint_manager.py:2142] [process=6][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts. I0425 16:13:18.577893 138064362866496 checkpoint_manager.py:2036] [process=6][thread=MainThread][step=19][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=19. I0425 16:13:18.578035 138064362866496 checkpoint_manager.py:2013] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0425 16:13:18.578797 138064362866496 metric_logger.py:185] completed step: 19, seconds: 0.147, TFLOP/s/device: 92.293, Tokens/s/device: 13911.342, 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: Sat Apr 25 16:13:31 UTC 2026 EXIT_CODE=0