2026-04-15 23:22:05.098725: 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) I0415 23:22:05.215774 137498252926080 max_utils.py:238] Skipping jax distributed system due to skip_jax_distributed_system=True flag. I0415 23:22:58.812711 137498252926080 max_utils.py:800] System Information: Jax Version: 0.9.2 I0415 23:22:58.812817 137498252926080 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0415 23:22:58.812850 137498252926080 max_utils.py:802] System Information: Jax Backend: PJRT C API TFRT TPU v6 lite Built on Apr 6 2026 20:48:10 (1775533690) cl/895581894 I0415 23:22:58.812874 137498252926080 train_utils.py:334] WARNING: 'dataset_path' might be pointing your local file system I0415 23:22:58.812897 137498252926080 train_utils.py:347] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0415 23:22:58.812968 137498252926080 train.py:715] [DECOUPLED NO-OP] skipping cloud diagnostics wrapper. W0415 23:22:58.903093 3365964 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0415 23:22:59.287655 137498252926080 maxtext_utils.py:1520] Num_devices: 8, shape (1, 1, 1, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0415 23:22:59.287912 137498252926080 checkpointing.py:677] Setting up checkpoint logger... I0415 23:22:59.287958 137498252926080 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True I0415 23:22:59.287998 137498252926080 pytree_checkpoint_handler.py:577] save_device_host_concurrent_bytes=None I0415 23:22:59.288445 137498252926080 base_pytree_checkpoint_handler.py:411] 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 0x7d0d379f8800>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0415 23:23:01.651954 137498252926080 checkpointing.py:265] Enabling policy for fixed interval checkpointing. I0415 23:23:01.652161 137498252926080 checkpoint_manager.py:702] [process=0][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d06bc9d3f20>}, handler_registry=None I0415 23:23:01.652412 137498252926080 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d06bc9d3f20>` 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`. I0415 23:23:01.652452 137498252926080 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d06bb7314f0>` 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`. I0415 23:23:01.652481 137498252926080 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 0x7d06bc9d3f20>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d06bc9d3f20>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d06bb7314f0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d06bb7314f0>}). I0415 23:23:01.652766 137498252926080 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.28 I0415 23:23:01.652817 137498252926080 async_checkpointer.py:177] [process=0][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>.<lambda> at 0x7d06bb7394e0> timeout: 600 secs and primary_host=0 for async checkpoint writes I0415 23:23:01.793176 137498252926080 checkpoint_manager.py:1788] Found 0 checkpoint steps in gs://wanglance-maxtext/linen_ckpt_feat_migrate_nnx_utils_20260415_230805/linen_feat_migrate_nnx_utils_20260415_230805_06_grad_accum/checkpoints I0415 23:23:01.793393 137498252926080 checkpoint_manager.py:921] [process=0][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_hns=False, 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), root_directory=gs://wanglance-maxtext/linen_ckpt_feat_migrate_nnx_utils_20260415_230805/linen_feat_migrate_nnx_utils_20260415_230805_06_grad_accum/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7d06bbf842c0> I0415 23:23:01.793473 137498252926080 checkpointing.py:301] Checkpoint manager created! I0415 23:23:02.643098 137498252926080 nnx_wrappers.py:437] Unknown Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0415 23:23:02.643199 137498252926080 nnx_wrappers.py:437] Unknown Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0415 23:23:02.731990 137498252926080 attentions.py:1088] attentions/inputs_q Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0415 23:23:02.732077 137498252926080 attentions.py:1088] attentions/inputs_q Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0415 23:23:02.746319 137498252926080 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0415 23:23:02.746369 137498252926080 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, None). I0415 23:23:02.766831 137498252926080 attentions.py:1154] attentions/query Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0415 23:23:02.766890 137498252926080 attentions.py:1154] attentions/query Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0415 23:23:02.781412 137498252926080 attentions.py:1155] attentions/key Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0415 23:23:02.781461 137498252926080 attentions.py:1155] attentions/key Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0415 23:23:02.795591 137498252926080 attentions.py:1156] attentions/value Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0415 23:23:02.795640 137498252926080 attentions.py:1156] attentions/value Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0415 23:23:02.817153 137498252926080 attentions.py:1197] attentions/out Logical: bfloat16[8,2048,16,128]..................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0415 23:23:02.817208 137498252926080 attentions.py:1197] attentions/out Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, None, None). I0415 23:23:02.835417 137498252926080 linears.py:525] linears/x Logical: bfloat16[8,2048,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0415 23:23:02.835467 137498252926080 linears.py:525] linears/x Physical: bfloat16[8,2048,7168]....................................... ('fsdp', None, None). I0415 23:23:03.025589 137498252926080 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint I0415 23:23:03.025685 137498252926080 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint. W0415 23:23:03.075940 3365964 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. [DECOUPLED NO-OP] gcs_storage: using stubs. [DECOUPLED NO-OP] mldiagnostics: using stub. [DECOUPLED NO-OP] mldiagnostics: using stub. [DECOUPLED NO-OP] mldiagnostics: using stub. [DECOUPLED NO-OP] workload_monitor: using stub. [DECOUPLED NO-OP] vertex_tensorboard: using stub. fsdp: 8 I0415 23:23:03.471531 137498252926080 maxtext_utils.py:1623] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0415 23:23:03.471645 137498252926080 maxtext_utils.py:1623] params/params/decoder/layers/mlp/wi_0/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0415 23:23:03.471687 137498252926080 maxtext_utils.py:1623] params/params/decoder/layers/mlp/wi_1/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0415 23:23:03.471732 137498252926080 maxtext_utils.py:1623] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: P('mlp', 'layers', 'embed') Physical: (None, None, 'fsdp') I0415 23:23:03.471771 137498252926080 maxtext_utils.py:1623] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0415 23:23:03.471799 137498252926080 maxtext_utils.py:1623] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0415 23:23:03.471848 137498252926080 maxtext_utils.py:1623] params/params/decoder/layers/self_attention/key/kernel Shape: float32[2048,16,16,128] Logical: P('embed', 'layers', 'kv_heads', 'kv_head_dim') Physical: ('fsdp', None, None, None) I0415 23:23:03.471890 137498252926080 maxtext_utils.py:1623] params/params/decoder/layers/self_attention/out/kernel Shape: float32[16,16,128,2048] Logical: P('heads', 'layers', 'kv', 'embed') Physical: (None, None, None, 'fsdp') I0415 23:23:03.471919 137498252926080 maxtext_utils.py:1623] params/params/decoder/layers/self_attention/query/kernel Shape: float32[2048,16,16,128] Logical: P('embed', 'layers', 'q_heads', 'kv') Physical: ('fsdp', None, None, None) I0415 23:23:03.471946 137498252926080 maxtext_utils.py:1623] params/params/decoder/layers/self_attention/value/kernel Shape: float32[2048,16,16,128] Logical: P('embed', 'layers', 'kv_heads', 'kv_head_dim') Physical: ('fsdp', None, None, None) I0415 23:23:03.471981 137498252926080 maxtext_utils.py:1623] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed', 'vocab') Physical: ('fsdp', None) I0415 23:23:03.472014 137498252926080 maxtext_utils.py:1623] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed') Physical: (None, 'fsdp') I0415 23:23:03.490197 137498252926080 gradient_accumulation.py:68] gradient_accumulation/inputs Logical: float32[2048]............................................... Unknown. I0415 23:23:03.490248 137498252926080 gradient_accumulation.py:68] gradient_accumulation/inputs Physical: float32[2048]............................................... (None,). I0415 23:23:03.503247 137498252926080 gradient_accumulation.py:68] gradient_accumulation/inputs Logical: float32[2048,16,7168]....................................... Unknown. I0415 23:23:03.503295 137498252926080 gradient_accumulation.py:68] gradient_accumulation/inputs Physical: float32[2048,16,7168]....................................... ('fsdp', None, None). I0415 23:23:03.529039 137498252926080 gradient_accumulation.py:68] gradient_accumulation/inputs Logical: float32[7168,16,2048]....................................... Unknown. I0415 23:23:03.529103 137498252926080 gradient_accumulation.py:68] gradient_accumulation/inputs Physical: float32[7168,16,2048]....................................... (None, None, 'fsdp'). I0415 23:23:03.542012 137498252926080 gradient_accumulation.py:68] gradient_accumulation/inputs Logical: float32[2048,16]............................................ Unknown. I0415 23:23:03.542068 137498252926080 gradient_accumulation.py:68] gradient_accumulation/inputs Physical: float32[2048,16]............................................ (None, None). I0415 23:23:03.567819 137498252926080 gradient_accumulation.py:68] gradient_accumulation/inputs Logical: float32[2048,16,16,128]..................................... Unknown. I0415 23:23:03.567877 137498252926080 gradient_accumulation.py:68] gradient_accumulation/inputs Physical: float32[2048,16,16,128]..................................... ('fsdp', None, None, None). I0415 23:23:03.580783 137498252926080 gradient_accumulation.py:68] gradient_accumulation/inputs Logical: float32[16,16,128,2048]..................................... Unknown. I0415 23:23:03.580829 137498252926080 gradient_accumulation.py:68] gradient_accumulation/inputs Physical: float32[16,16,128,2048]..................................... (None, None, None, 'fsdp'). I0415 23:23:03.619463 137498252926080 gradient_accumulation.py:68] gradient_accumulation/inputs Logical: float32[2048,32000]......................................... Unknown. I0415 23:23:03.619520 137498252926080 gradient_accumulation.py:68] gradient_accumulation/inputs Physical: float32[2048,32000]......................................... ('fsdp', None). I0415 23:23:03.632433 137498252926080 gradient_accumulation.py:68] gradient_accumulation/inputs Logical: float32[32000,2048]......................................... Unknown. I0415 23:23:03.632479 137498252926080 gradient_accumulation.py:68] gradient_accumulation/inputs Physical: float32[32000,2048]......................................... (None, 'fsdp'). I0415 23:23:04.223404 137498252926080 train.py:155] train/xent Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length'). I0415 23:23:04.223555 137498252926080 train.py:155] train/xent Physical: float32[8,2048]............................................. ('fsdp', None). I0415 23:23:04.238142 137498252926080 train.py:162] train/z_loss Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length'). I0415 23:23:04.238191 137498252926080 train.py:162] train/z_loss Physical: float32[8,2048]............................................. ('fsdp', None). W0415 23:23:05.092768 3365964 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0415 23:23:05.225160 137498252926080 max_utils.py:791] Total memory size: 4.5 GB, Output size: 1.5 GB, Temp size: 2.9 GB, Argument size: 1.5 GB, Host temp size: 0.0 GB. I0415 23:23:05.225626 137498252926080 max_utils.py:194] tensorboardX not available; using no-op SummaryWriter. I0415 23:23:05.225770 137498252926080 metric_logger.py:289] number parameters: 1.104 billion W0415 23:23:06.582468 3365964 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0415 23:23:06.709668 137498252926080 checkpointing.py:772] Waiting for step 0 to finish before checkpoint... I0415 23:23:07.131727 137498252926080 checkpointing.py:776] Waited 0.42204737663269043 seconds for step 0 to finish before starting checkpointing. I0415 23:23:07.132177 137498252926080 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0415 23:23:07.132328 137498252926080 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 0 I0415 23:23:07.132708 137498252926080 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/linen_ckpt_feat_migrate_nnx_utils_20260415_230805/linen_feat_migrate_nnx_utils_20260415_230805_06_grad_accum/checkpoints/0. I0415 23:23:07.223565 137498252926080 signaling_client.py:373] Using ThreadSafeKeyValueSignalingClient I0415 23:23:07.303960 137390679131712 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_feat_migrate_nnx_utils_20260415_230805/linen_feat_migrate_nnx_utils_20260415_230805_06_grad_accum/checkpoints/0 I0415 23:23:07.320736 137498252926080 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array. I0415 23:23:07.320823 137498252926080 replica_slices.py:410] 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 W0415 23:23:07.546936 3365964 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0415 23:23:07.560158 3365964 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0415 23:23:07.569512 3365964 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0415 23:23:07.578192 3365964 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0415 23:23:07.590965 3365964 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0415 23:23:07.599396 3365964 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0415 23:23:07.606057 3365964 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0415 23:23:07.611297 3365964 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0415 23:23:08.008304 137390668645952 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_feat_migrate_nnx_utils_20260415_230805/linen_feat_migrate_nnx_utils_20260415_230805_06_grad_accum/checkpoints/0/items I0415 23:23:08.150531 137390632994368 checkpoint.py:188] Wrote Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776295387915949726, 'commit_timestamp_nsecs': None, 'custom_metadata': {}}, json={"item_handlers": null, "metrics": {}, "performance_metrics": {}, "init_timestamp_nsecs": 1776295387915949726, "commit_timestamp_nsecs": null, "custom_metadata": {}} to gs://wanglance-maxtext/linen_ckpt_feat_migrate_nnx_utils_20260415_230805/linen_feat_migrate_nnx_utils_20260415_230805_06_grad_accum/checkpoints/0/_CHECKPOINT_METADATA I0415 23:23:08.407932 137498252926080 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 1.087591s I0415 23:23:08.408365 137498252926080 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 10.427 GiB/s (total gbytes: 12.3 GiB) (time elapsed: a second) (per-host) I0415 23:23:08.408417 137498252926080 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 1.183627s (batch_requests_ready=0.091832s, total_serialization_initiated=1.091476s, others=0.000319s) I0415 23:23:08.408488 137498252926080 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.184456s (all_items=0.000020s, per_item={'items': '0.00001979'}, temp_paths=1.184436) I0415 23:23:08.409277 137390612022848 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0415 23:23:08.409373 137498252926080 async_checkpointer.py:561] Finished blocking save. Time taken: 1.277005s. Continuing background save to gs://wanglance-maxtext/linen_ckpt_feat_migrate_nnx_utils_20260415_230805/linen_feat_migrate_nnx_utils_20260415_230805_06_grad_accum/checkpoints/0. I0415 23:23:08.409560 137498252926080 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0415 23:23:08.409741 137390689617472 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0415 23:23:08.409855 137498252926080 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/linen_ckpt_feat_migrate_nnx_utils_20260415_230805/linen_feat_migrate_nnx_utils_20260415_230805_06_grad_accum/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776295387.1321642, 'wait_for_prev_duration_secs': 4.076957702636719e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776295387.132349, 'checkpointer_blocking_duration_secs': 1.2771353721618652, 'get_old_steps_start_time': 1776295388.4095054, 'get_old_steps_duration_secs': 2.0742416381835938e-05, 'checkpoint_manager_blocking_start_time': 1776295387.132083, 'checkpoint_manager_blocking_duration_secs': 1.2777349948883057} I0415 23:23:08.409970 137498252926080 checkpointing.py:408] Started an asynchronous checkpoint save for step 0 I0415 23:23:08.410010 137498252926080 max_utils.py:750] Memstats: After params initialized: I0415 23:23:08.410103 137498252926080 max_utils.py:756] Using (GB) 1.6 / 31.25 (5.120000%) on TPU_0(process=0,(0,0,0,0)) I0415 23:23:08.410131 137498252926080 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_1(process=0,(1,0,0,0)) I0415 23:23:08.410151 137498252926080 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_2(process=0,(0,1,0,0)) I0415 23:23:08.410168 137498252926080 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_3(process=0,(1,1,0,0)) I0415 23:23:08.410184 137498252926080 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_4(process=0,(0,2,0,0)) I0415 23:23:08.410200 137498252926080 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_5(process=0,(1,2,0,0)) I0415 23:23:08.410216 137498252926080 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_6(process=0,(0,3,0,0)) I0415 23:23:08.410232 137498252926080 max_utils.py:756] Using (GB) 1.59 / 31.25 (5.088000%) on TPU_7(process=0,(1,3,0,0)) W0415 23:23:08.415874 3365964 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0415 23:23:08.425263 3365964 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. W0415 23:23:08.430040 3365964 pjrt_executable.cc:642] Assume version compatibility. PjRt-IFRT does not track XLA executable versions. I0415 23:23:08.474761 3368239 google_auth_provider.cc:149] Using credentials at ~/.config/gcloud/application_default_credentials.json I0415 23:23:08.474828 3368239 google_auth_provider.cc:156] Using OAuth2 AuthProvider I0415 23:23:08.733760 137498252926080 metric_logger.py:185] completed step: 0, seconds: 1.483, TFLOP/s/device: 36.638, Tokens/s/device: 5522.404, total_weights: 65536, loss: 10.871 I0415 23:23:08.734805 137498252926080 metric_logger.py:269] To see full metrics 'tensorboard --logdir=gs://wanglance-maxtext/linen_ckpt_feat_migrate_nnx_utils_20260415_230805/linen_feat_migrate_nnx_utils_20260415_230805_06_grad_accum/tensorboard/' I0415 23:23:09.160480 137498252926080 metric_logger.py:185] completed step: 1, seconds: 2.022, TFLOP/s/device: 26.876, Tokens/s/device: 4051.068, total_weights: 65536, loss: 10.871 I0415 23:23:09.418062 137390679131712 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://wanglance-maxtext/linen_ckpt_feat_migrate_nnx_utils_20260415_230805/linen_feat_migrate_nnx_utils_20260415_230805_06_grad_accum/checkpoints/0/items/array_metadatas/process_0 I0415 23:23:09.589276 137498252926080 metric_logger.py:185] completed step: 2, seconds: 0.007, TFLOP/s/device: 8166.569, Tokens/s/device: 1230954.170, total_weights: 65536, loss: 10.261 I0415 23:23:10.024967 137498252926080 metric_logger.py:185] completed step: 3, seconds: 0.427, TFLOP/s/device: 127.144, Tokens/s/device: 19164.456, total_weights: 65536, loss: 9.732 I0415 23:23:47.534328 137498252926080 metric_logger.py:185] completed step: 4, seconds: 0.430, TFLOP/s/device: 126.426, Tokens/s/device: 19056.304, total_weights: 65536, loss: 9.274 I0415 23:23:47.541394 137498252926080 metric_logger.py:185] completed step: 5, seconds: 0.458, TFLOP/s/device: 118.786, Tokens/s/device: 17904.759, total_weights: 65536, loss: 8.888 I0415 23:23:47.952883 137498252926080 metric_logger.py:185] completed step: 6, seconds: 37.487, TFLOP/s/device: 1.450, Tokens/s/device: 218.530, total_weights: 65536, loss: 8.588 I0415 23:23:48.205849 137390622508608 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 39.729609s (commit=39.301434s, array_metadata_write=0.428174s) I0415 23:23:48.207116 137390612022848 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 308.348 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 40 seconds) (per-host) I0415 23:23:48.207241 137390612022848 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 39.797816s. I0415 23:23:48.381515 137498252926080 metric_logger.py:185] completed step: 7, seconds: 0.005, TFLOP/s/device: 11367.604, Tokens/s/device: 1713449.069, total_weights: 65536, loss: 8.380 I0415 23:23:48.442478 137390612022848 checkpoint.py:228] Read Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776295387915949726, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} from gs://wanglance-maxtext/linen_ckpt_feat_migrate_nnx_utils_20260415_230805/linen_feat_migrate_nnx_utils_20260415_230805_06_grad_accum/checkpoints/0/_CHECKPOINT_METADATA I0415 23:23:48.647228 137390612022848 array_metadata_store.py:367] [process=0][thread=async_save] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0. I0415 23:23:48.813119 137498252926080 metric_logger.py:185] completed step: 8, seconds: 0.412, TFLOP/s/device: 131.823, Tokens/s/device: 19869.847, total_weights: 65536, loss: 8.251 I0415 23:23:48.831654 137390632994368 checkpoint.py:247] Updated Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776295387915949726, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} to gs://wanglance-maxtext/linen_ckpt_feat_migrate_nnx_utils_20260415_230805/linen_feat_migrate_nnx_utils_20260415_230805_06_grad_accum/checkpoints/0/_CHECKPOINT_METADATA I0415 23:23:49.063158 137390612022848 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0415 23:23:49.063766 137390612022848 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.575824s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/linen_ckpt_feat_migrate_nnx_utils_20260415_230805/linen_feat_migrate_nnx_utils_20260415_230805_06_grad_accum/checkpoints/0/items I0415 23:23:49.064465 137390612022848 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_feat_migrate_nnx_utils_20260415_230805/linen_feat_migrate_nnx_utils_20260415_230805_06_grad_accum/checkpoints/0/items I0415 23:23:49.241011 137498252926080 checkpointing.py:772] Waiting for step 9 to finish before checkpoint... I0415 23:23:49.241856 137498252926080 checkpointing.py:776] Waited 0.0008637905120849609 seconds for step 9 to finish before starting checkpointing. I0415 23:23:49.242142 137498252926080 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0415 23:23:49.303654 137390612022848 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_feat_migrate_nnx_utils_20260415_230805/linen_feat_migrate_nnx_utils_20260415_230805_06_grad_accum/checkpoints/0 I0415 23:23:49.962553 137390612022848 atomicity.py:794] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://wanglance-maxtext/linen_ckpt_feat_migrate_nnx_utils_20260415_230805/linen_feat_migrate_nnx_utils_20260415_230805_06_grad_accum/checkpoints/0`. I0415 23:23:49.963190 137390612022848 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 42.830825s. directory=gs://wanglance-maxtext/linen_ckpt_feat_migrate_nnx_utils_20260415_230805/linen_feat_migrate_nnx_utils_20260415_230805_06_grad_accum/checkpoints/0 I0415 23:23:49.963269 137390612022848 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 41.553851s. I0415 23:23:49.963443 137390689617472 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0415 23:23:49.963543 137390689617472 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0415 23:23:49.963634 137390689617472 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0415 23:23:49.963689 137390689617472 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0415 23:23:49.963827 137498252926080 checkpoint_manager.py:2006] [process=0][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0. I0415 23:23:49.964138 137498252926080 checkpoint_manager.py:1501] [process=0] Saving checkpoint at step 9 I0415 23:23:49.964457 137498252926080 async_checkpointer.py:452] [process=0] Started async saving checkpoint to gs://wanglance-maxtext/linen_ckpt_feat_migrate_nnx_utils_20260415_230805/linen_feat_migrate_nnx_utils_20260415_230805_06_grad_accum/checkpoints/9. I0415 23:23:50.137638 137498252926080 jax_array_handlers.py:347] Scheduling D2H of 39 prioritized jax.Array. I0415 23:23:50.137726 137498252926080 replica_slices.py:410] 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 I0415 23:23:50.164689 137390689617472 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_feat_migrate_nnx_utils_20260415_230805/linen_feat_migrate_nnx_utils_20260415_230805_06_grad_accum/checkpoints/9 I0415 23:23:50.870539 137390540719680 atomicity.py:137] Creating tmp directory gs://wanglance-maxtext/linen_ckpt_feat_migrate_nnx_utils_20260415_230805/linen_feat_migrate_nnx_utils_20260415_230805_06_grad_accum/checkpoints/9/items I0415 23:24:02.368632 137498252926080 base_pytree_checkpoint_handler.py:153] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 12.231405s I0415 23:24:02.372724 137498252926080 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/blocking_gbytes_per_sec: 1.001 GiB/s (total gbytes: 12.3 GiB) (time elapsed: 12 seconds) (per-host) I0415 23:24:02.372786 137498252926080 base_pytree_checkpoint_handler.py:732] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 12.323919s (batch_requests_ready=0.085210s, total_serialization_initiated=12.234744s, others=0.003965s) I0415 23:24:02.372859 137498252926080 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 12.324450s (all_items=0.000024s, per_item={'items': '0.00002384'}, temp_paths=12.324426) I0415 23:24:02.374606 137390622508608 async_checkpointer.py:79] [process=0][thread=async_save] Background save thread started. I0415 23:24:02.374717 137498252926080 async_checkpointer.py:561] Finished blocking save. Time taken: 12.410520s. Continuing background save to gs://wanglance-maxtext/linen_ckpt_feat_migrate_nnx_utils_20260415_230805/linen_feat_migrate_nnx_utils_20260415_230805_06_grad_accum/checkpoints/9. I0415 23:24:02.374981 137498252926080 checkpoint_manager.py:1549] [process=0][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0415 23:24:02.375158 137390612022848 async_checkpointer.py:265] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0415 23:24:02.375260 137498252926080 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://wanglance-maxtext/linen_ckpt_feat_migrate_nnx_utils_20260415_230805/linen_feat_migrate_nnx_utils_20260415_230805_06_grad_accum/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776295429.242101, 'wait_for_prev_duration_secs': 0.7218127250671387, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776295429.9641635, 'checkpointer_blocking_duration_secs': 12.410698652267456, 'get_old_steps_start_time': 1776295442.3748856, 'get_old_steps_duration_secs': 4.100799560546875e-05, 'checkpoint_manager_blocking_start_time': 1776295429.242059, 'checkpoint_manager_blocking_duration_secs': 13.133172988891602} I0415 23:24:02.375383 137498252926080 checkpointing.py:408] Started an asynchronous checkpoint save for step 9 I0415 23:24:02.375417 137498252926080 checkpoint_manager.py:1994] [process=0][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0415 23:24:03.147400 137390679131712 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://wanglance-maxtext/linen_ckpt_feat_migrate_nnx_utils_20260415_230805/linen_feat_migrate_nnx_utils_20260415_230805_06_grad_accum/checkpoints/9/items/array_metadatas/process_0 I0415 23:24:30.505150 137390540719680 base_pytree_checkpoint_handler.py:1217] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 28.131547s (commit=27.673289s, array_metadata_write=0.458258s) I0415 23:24:30.506217 137390622508608 base_pytree_checkpoint_handler.py:128] [process=0] /jax/checkpoint/write/gbytes_per_sec: 312.349 MiB/s (total gbytes: 12.3 GiB) (time elapsed: 40 seconds) (per-host) I0415 23:24:30.506322 137390622508608 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 28.131546s. I0415 23:24:30.945202 137390622508608 array_metadata_store.py:367] [process=0][thread=async_save] Skipped cross-host ArrayMetadata validation because only one process is found: process_index=0. I0415 23:24:31.371955 137390622508608 ocdbt_utils.py:56] Param validation support for Zarr3 will be added later (b/362328389). I0415 23:24:31.372714 137390622508608 base_pytree_checkpoint_handler.py:1342] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 0.587525s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://wanglance-maxtext/linen_ckpt_feat_migrate_nnx_utils_20260415_230805/linen_feat_migrate_nnx_utils_20260415_230805_06_grad_accum/checkpoints/9/items I0415 23:24:31.373357 137390622508608 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_feat_migrate_nnx_utils_20260415_230805/linen_feat_migrate_nnx_utils_20260415_230805_06_grad_accum/checkpoints/9/items I0415 23:24:31.616967 137390622508608 atomicity.py:608] Finalizing gs://wanglance-maxtext/linen_ckpt_feat_migrate_nnx_utils_20260415_230805/linen_feat_migrate_nnx_utils_20260415_230805_06_grad_accum/checkpoints/9 I0415 23:24:32.296723 137390622508608 atomicity.py:794] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://wanglance-maxtext/linen_ckpt_feat_migrate_nnx_utils_20260415_230805/linen_feat_migrate_nnx_utils_20260415_230805_06_grad_accum/checkpoints/9`. I0415 23:24:32.297367 137390622508608 async_checkpointer.py:420] Finished async_save (blocking + background). Time taken: 42.333188s. directory=gs://wanglance-maxtext/linen_ckpt_feat_migrate_nnx_utils_20260415_230805/linen_feat_migrate_nnx_utils_20260415_230805_06_grad_accum/checkpoints/9 I0415 23:24:32.297450 137390622508608 async_checkpointer.py:144] [process=0][thread=async_save] Background save thread done. Time taken: 29.922676s. I0415 23:24:32.297605 137390612022848 async_checkpointer.py:273] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0415 23:24:32.297702 137390612022848 async_checkpointer.py:283] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0415 23:24:32.297769 137390612022848 checkpoint_manager.py:2103] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0415 23:24:32.297810 137390612022848 checkpoint_manager.py:2112] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0415 23:24:32.297954 137498252926080 checkpoint_manager.py:2006] [process=0][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9. I0415 23:24:32.298086 137498252926080 checkpoint_manager.py:1983] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0415 23:24:32.298771 137498252926080 metric_logger.py:185] completed step: 9, seconds: 0.429, TFLOP/s/device: 126.801, Tokens/s/device: 19112.857, total_weights: 65536, loss: 8.175 Per train step: Total TFLOPs: 54.35 split as 93.93% learnable weight flops and 6.07% attention flops