XPK Start: Sun Apr 19 03:54:54 UTC 2026 2026-04-19 03:54:58.076514: 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 00:00:1776570898.088682 10 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered E0000 00:00:1776570898.092339 10 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered W0000 00:00:1776570898.103608 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776570898.103626 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776570898.103629 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. W0000 00:00:1776570898.103631 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once. 2026-04-19 03:55:17.414633: E external/local_xla/xla/stream_executor/cuda/cuda_platform.cc:51] failed call to cuInit: INTERNAL: CUDA error: Failed call to cuInit: UNKNOWN ERROR (303) I0419 03:55:17.946127 132434841487168 max_utils.py:273] Attempting to initialize the jax distributed system... INFO:2026-04-19 03:55:26,987:jax._src.distributed:140: Starting JAX distributed service on [::]:8482 I0419 03:55:26.987142 132434841487168 distributed.py:140] Starting JAX distributed service on [::]:8482 INFO:2026-04-19 03:55:26,989:jax._src.distributed:157: Connecting to JAX distributed service on mt-11-optimizer-offload-w16a0-slice-job-0-0.mt-11-optimizer-offload-w16a0:8482 I0419 03:55:26.989817 132434841487168 distributed.py:157] Connecting to JAX distributed service on mt-11-optimizer-offload-w16a0-slice-job-0-0.mt-11-optimizer-offload-w16a0:8482 I0419 03:55:28.460933 132434841487168 max_utils.py:284] Jax distributed system initialized! I0419 03:55:35.400934 132434841487168 max_utils.py:800] System Information: Jax Version: 0.8.1 I0419 03:55:35.401041 132434841487168 max_utils.py:801] System Information: Jaxlib Version: 0.8.1 I0419 03:55:35.401093 132434841487168 max_utils.py:802] System Information: Jax Backend: PJRT C API TFRT TPU v6 lite Built on Nov 12 2025 14:16:36 (1762985796) cl/831091709 I0419 03:55:35.401137 132434841487168 train_utils.py:377] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0419 03:55:36.020997 132434841487168 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0419 03:55:36.021655 132434841487168 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0419 03:55:36.021859 132434841487168 checkpointing.py:688] Setting up checkpoint logger... I0419 03:55:36.021915 132434841487168 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0419 03:55:36.021977 132434841487168 pytree_checkpoint_handler.py:589] save_device_host_concurrent_bytes=None I0419 03:55:36.022377 132434841487168 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 0x787267575310>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0419 03:55:39.219122 132434841487168 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0419 03:55:39.219491 132434841487168 checkpoint_manager.py:709] [process=3][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x785f68c29d90>}, handler_registry=None I0419 03:55:39.219729 132434841487168 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x785f68c29d90>` for item "items" and save args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>` to `_handler_registry`. I0419 03:55:39.219779 132434841487168 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x785f68c2f050>` for item "metrics" and save args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>` to `_handler_registry`. I0419 03:55:39.219815 132434841487168 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 0x785f68c29d90>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x785f68c29d90>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x785f68c2f050>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x785f68c2f050>}). I0419 03:55:39.220341 132434841487168 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.33 I0419 03:55:39.220420 132434841487168 async_checkpointer.py:177] [process=3][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x785e0420c180> timeout: 600 secs and primary_host=0 for async checkpoint writes I0419 03:55:41.241229 132434841487168 checkpoint_manager.py:1818] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_11_optimizer_offload_false/checkpoints I0419 03:55:41.243483 132434841487168 checkpoint_manager.py:929] [process=3][thread=MainThread] CheckpointManager created, primary_host=0, CheckpointManagerOptions=CheckpointManagerOptions(save_interval_steps=1, max_to_keep=None, keep_time_interval=None, keep_period=None, should_keep_fn=None, best_fn=None, best_mode='max', keep_checkpoints_without_metrics=True, step_prefix=None, step_format_fixed_length=None, step_name_format=None, create=True, cleanup_tmp_directories=False, save_on_steps=frozenset(), single_host_load_and_broadcast=False, todelete_subdir=None, todelete_full_path=None, enable_background_delete=False, read_only=False, enable_async_checkpointing=True, async_options=None, multiprocessing_options=MultiprocessingOptions(primary_host=0, active_processes=None, barrier_sync_key_prefix=None), should_save_fn=None, file_options=FileOptions(path_permission_mode=None), save_root_metadata=True, temporary_path_class=None, save_decision_policy=FixedIntervalPolicy(interval=10), preservation_policy=LatestN(n=None), prevent_write_metrics=False, enable_should_save_is_saving_in_progress_check=True, enable_per_process_directory_creation=False, lightweight_initialize=False), root_directory=gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_11_optimizer_offload_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x785f68c2ede0> I0419 03:55:41.243598 132434841487168 checkpointing.py:302] Checkpoint manager created! I0419 03:55:42.138664 132434841487168 nnx_wrappers.py:455] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0419 03:55:42.138771 132434841487168 nnx_wrappers.py:455] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0419 03:55:42.514449 132434841487168 attentions.py:1084] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0419 03:55:42.514552 132434841487168 attentions.py:1084] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0419 03:55:42.530574 132434841487168 attentions.py:1085] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0419 03:55:42.530636 132434841487168 attentions.py:1085] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0419 03:55:42.553608 132434841487168 attentions.py:1150] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0419 03:55:42.553675 132434841487168 attentions.py:1150] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0419 03:55:42.569625 132434841487168 attentions.py:1151] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0419 03:55:42.569687 132434841487168 attentions.py:1151] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0419 03:55:42.585524 132434841487168 attentions.py:1152] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0419 03:55:42.585584 132434841487168 attentions.py:1152] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0419 03:55:42.615525 132434841487168 attentions.py:1193] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0419 03:55:42.615629 132434841487168 attentions.py:1193] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0419 03:55:42.635387 132434841487168 linears.py:541] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0419 03:55:42.635452 132434841487168 linears.py:541] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0419 03:55:42.833878 132434841487168 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0419 03:55:42.833991 132434841487168 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0419 03:55:44.308770 132434841487168 maxtext_utils.py:1740] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: PartitionSpec('norm',) Physical: (None,) I0419 03:55:44.308909 132434841487168 maxtext_utils.py:1740] params/params/decoder/layers/mlp/wi_0/kernel Shape: float32[2048,16,7168] Logical: PartitionSpec('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0419 03:55:44.308967 132434841487168 maxtext_utils.py:1740] params/params/decoder/layers/mlp/wi_1/kernel Shape: float32[2048,16,7168] Logical: PartitionSpec('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0419 03:55:44.309027 132434841487168 maxtext_utils.py:1740] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: PartitionSpec('mlp', 'layers', 'embed') Physical: (None, None, 'fsdp') I0419 03:55:44.309081 132434841487168 maxtext_utils.py:1740] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: PartitionSpec('norm', 'layers') Physical: (None, None) I0419 03:55:44.309123 132434841487168 maxtext_utils.py:1740] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: PartitionSpec('norm', 'layers') Physical: (None, None) I0419 03:55:44.309177 132434841487168 maxtext_utils.py:1740] params/params/decoder/layers/self_attention/key/kernel Shape: float32[2048,16,16,128] Logical: PartitionSpec('embed', 'layers', 'kv_heads', 'kv_head_dim') Physical: ('fsdp', None, None, None) I0419 03:55:44.309252 132434841487168 maxtext_utils.py:1740] params/params/decoder/layers/self_attention/out/kernel Shape: float32[16,16,128,2048] Logical: PartitionSpec('heads', 'layers', 'kv', 'embed') Physical: (None, None, None, 'fsdp') I0419 03:55:44.309302 132434841487168 maxtext_utils.py:1740] params/params/decoder/layers/self_attention/query/kernel Shape: float32[2048,16,16,128] Logical: PartitionSpec('embed', 'layers', 'q_heads', 'kv') Physical: ('fsdp', None, None, None) I0419 03:55:44.309342 132434841487168 maxtext_utils.py:1740] params/params/decoder/layers/self_attention/value/kernel Shape: float32[2048,16,16,128] Logical: PartitionSpec('embed', 'layers', 'kv_heads', 'kv_head_dim') Physical: ('fsdp', None, None, None) I0419 03:55:44.309394 132434841487168 maxtext_utils.py:1740] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: PartitionSpec('embed', 'vocab') Physical: ('fsdp', None) I0419 03:55:44.309443 132434841487168 maxtext_utils.py:1740] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: PartitionSpec('vocab', 'embed') Physical: (None, 'fsdp') I0419 03:55:44.820705 132434841487168 train.py:158] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0419 03:55:44.820801 132434841487168 train.py:158] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0419 03:55:44.835727 132434841487168 train.py:165] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0419 03:55:44.835789 132434841487168 train.py:165] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0419 03:55:55.601937 132434841487168 max_utils.py:791] Total memory size: 1.5 GB, Output size: 0.4 GB, Temp size: 1.1 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB. I0419 03:55:55.602799 132434841487168 metric_logger.py:289] number parameters: 1.104 billion I0419 03:56:06.726574 132434841487168 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0419 03:56:06.978181 132434841487168 checkpointing.py:798] Waited 0.2515902519226074 seconds for step 0 to finish before starting checkpointing. I0419 03:56:06.980749 132434841487168 checkpoint_manager.py:2013] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0419 03:56:06.982640 132434841487168 checkpoint_manager.py:1518] [process=3] Saving checkpoint at step 0 I0419 03:56:06.985398 132434841487168 async_checkpointer.py:452] [process=3] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_11_optimizer_offload_false/checkpoints/0. I0419 03:56:08.387645 132434841487168 signaling_client.py:364] Using JaxDistributedSignalingClient I0419 03:56:08.388907 132434841487168 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array. I0419 03:56:08.388966 132434841487168 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0419 03:56:08.638797 132434841487168 base_pytree_checkpoint_handler.py:153] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.251235s I0419 03:56:08.638964 132434841487168 base_pytree_checkpoint_handler.py:129] [process=3] /jax/checkpoint/write/blocking_gbytes_per_sec: 1.649 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.9354119300842285 s) (per-host) I0419 03:56:08.639015 132434841487168 base_pytree_checkpoint_handler.py:737] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.935472s (batch_requests_ready=0.680458s, total_serialization_initiated=0.254947s, others=0.000067s) I0419 03:56:08.639104 132434841487168 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.939685s (all_items=0.000020s, per_item={'items': '0.00001955'}, temp_paths=0.939666) I0419 03:56:08.640078 132312079517440 async_checkpointer.py:79] [process=3][thread=async_save] Background save thread started. I0419 03:56:08.640210 132434841487168 async_checkpointer.py:561] Finished blocking save. Time taken: 1.657495s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_11_optimizer_offload_false/checkpoints/0. I0419 03:56:08.685867 132434841487168 checkpoint_manager.py:1566] [process=3][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0419 03:56:08.686182 132307776157440 async_checkpointer.py:265] [process=3][thread=save_finalize] Waiting for background save thread=async_save. I0419 03:56:08.686353 132434841487168 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_11_optimizer_offload_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776570966.9807312, 'wait_for_prev_duration_secs': 6.389617919921875e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776570966.9826808, 'checkpointer_blocking_duration_secs': 1.6577301025390625, 'get_old_steps_start_time': 1776570968.6404314, 'get_old_steps_duration_secs': 2.574920654296875e-05, 'checkpoint_manager_blocking_start_time': 1776570966.9787486, 'checkpoint_manager_blocking_duration_secs': 1.7075622081756592} I0419 03:56:08.686462 132434841487168 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0419 03:56:08.686515 132434841487168 max_utils.py:750] Memstats: After params initialized: I0419 03:56:08.686570 132434841487168 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_10(process=3,(2,2,0,0)) I0419 03:56:08.686606 132434841487168 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_11(process=3,(3,2,0,0)) I0419 03:56:08.686634 132434841487168 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_14(process=3,(2,3,0,0)) I0419 03:56:08.686660 132434841487168 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_15(process=3,(3,3,0,0)) I0419 03:56:08.953966 132434841487168 metric_logger.py:185] completed step: 0, seconds: 11.124, TFLOP/s/device: 1.221, Tokens/s/device: 184.112, total_weights: 65536, loss: 10.874 I0419 03:56:09.145832 132434841487168 metric_logger.py:185] completed step: 1, seconds: 2.226, TFLOP/s/device: 6.104, Tokens/s/device: 920.000, total_weights: 65536, loss: 10.874 I0419 03:56:09.541702 132434841487168 metric_logger.py:185] completed step: 2, seconds: 0.045, TFLOP/s/device: 305.123, Tokens/s/device: 45991.466, total_weights: 65536, loss: 10.263 I0419 03:56:09.689260 132434841487168 metric_logger.py:185] completed step: 3, seconds: 0.396, TFLOP/s/device: 34.310, Tokens/s/device: 5171.626, total_weights: 65536, loss: 9.734 I0419 03:56:09.984787 132434841487168 metric_logger.py:185] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.830, Tokens/s/device: 13389.471, total_weights: 65536, loss: 9.278 I0419 03:56:09.990272 132434841487168 metric_logger.py:185] completed step: 5, seconds: 0.148, TFLOP/s/device: 92.077, Tokens/s/device: 13878.818, total_weights: 65536, loss: 8.892 I0419 03:56:28.373107 132434841487168 metric_logger.py:185] completed step: 6, seconds: 0.296, TFLOP/s/device: 45.939, Tokens/s/device: 6924.463, total_weights: 65536, loss: 8.592 I0419 03:56:28.520694 132434841487168 metric_logger.py:185] completed step: 7, seconds: 18.236, TFLOP/s/device: 0.745, Tokens/s/device: 112.304, total_weights: 65536, loss: 8.384 I0419 03:56:28.668286 132434841487168 metric_logger.py:185] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.317, Tokens/s/device: 13462.878, total_weights: 65536, loss: 8.255 I0419 03:56:28.815489 132434841487168 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0419 03:56:28.816141 132434841487168 checkpointing.py:798] Waited 0.0006716251373291016 seconds for step 9 to finish before starting checkpointing. I0419 03:56:28.818177 132434841487168 checkpoint_manager.py:2024] [process=3][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0419 03:56:29.206842 2709 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0419 03:56:32.338701 132312087910144 array_metadata_store.py:203] [process=3][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_11_optimizer_offload_false/checkpoints/0/items/array_metadatas/process_3 I0419 03:57:01.151575 132312079517440 base_pytree_checkpoint_handler.py:129] [process=3] /jax/checkpoint/write/gbytes_per_sec: 29.554 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 53.44798159599304 s) (per-host) I0419 03:57:01.151692 132312079517440 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 52.511385s. I0419 03:57:10.601139 132312079517440 async_checkpointer.py:144] [process=3][thread=async_save] Background save thread done. Time taken: 61.960817s. I0419 03:57:10.601499 132307776157440 async_checkpointer.py:273] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save. I0419 03:57:10.601625 132307776157440 async_checkpointer.py:283] [process=3][thread=save_finalize] No errors found in background save thread=async_save. I0419 03:57:10.601675 132307776157440 checkpoint_manager.py:2133] [process=3][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0419 03:57:10.604033 132307776157440 checkpoint_manager.py:2142] [process=3][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0419 03:57:10.604196 132434841487168 checkpoint_manager.py:2036] [process=3][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0. W0419 03:57:10.604351 132434841487168 checkpoint_manager.py:1458] Waiting for previous save to complete took 41.786178 seconds. If this number is high, consider checkpointing less frequently. I0419 03:57:10.606314 132434841487168 checkpoint_manager.py:1518] [process=3] Saving checkpoint at step 9 I0419 03:57:10.609722 132434841487168 async_checkpointer.py:452] [process=3] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_11_optimizer_offload_false/checkpoints/9. I0419 03:57:11.592088 132434841487168 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array. I0419 03:57:11.592189 132434841487168 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0419 03:57:11.641005 132434841487168 base_pytree_checkpoint_handler.py:153] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.050170s I0419 03:57:11.641170 132434841487168 base_pytree_checkpoint_handler.py:129] [process=3] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.058 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.7496223449707031 s) (per-host) I0419 03:57:11.641221 132434841487168 base_pytree_checkpoint_handler.py:737] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.749687s (batch_requests_ready=0.697516s, total_serialization_initiated=0.052097s, others=0.000073s) I0419 03:57:11.641327 132434841487168 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.753698s (all_items=0.000017s, per_item={'items': '0.00001669'}, temp_paths=0.753682) I0419 03:57:11.642188 132308338206464 async_checkpointer.py:79] [process=3][thread=async_save] Background save thread started. I0419 03:57:11.642361 132434841487168 async_checkpointer.py:561] Finished blocking save. Time taken: 1.035971s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_11_optimizer_offload_false/checkpoints/9. I0419 03:57:12.069322 132434841487168 checkpoint_manager.py:1566] [process=3][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0419 03:57:12.069683 132307776157440 async_checkpointer.py:265] [process=3][thread=save_finalize] Waiting for background save thread=async_save. I0419 03:57:12.069861 132434841487168 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_11_optimizer_offload_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776570988.8181481, 'wait_for_prev_duration_secs': 41.78617763519287, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776571030.6063576, 'checkpointer_blocking_duration_secs': 1.0361168384552002, 'get_old_steps_start_time': 1776571031.6424975, 'get_old_steps_duration_secs': 2.574920654296875e-05, 'checkpoint_manager_blocking_start_time': 1776570988.8163872, 'checkpoint_manager_blocking_duration_secs': 43.2534282207489} I0419 03:57:12.069979 132434841487168 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0419 03:57:12.070023 132434841487168 checkpoint_manager.py:2024] [process=3][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0419 03:57:16.604652 132312087910144 array_metadata_store.py:203] [process=3][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260419_025828/linen_xpk_feat_nnx_set_defaults_true_20260419_025828_11_optimizer_offload_false/checkpoints/9/items/array_metadatas/process_3 I0419 03:57:53.815775 132308338206464 base_pytree_checkpoint_handler.py:129] [process=3] /jax/checkpoint/write/gbytes_per_sec: 36.800 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.92418885231018 s) (per-host) I0419 03:57:53.815898 132308338206464 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.173586s. I0419 03:58:03.541357 132308338206464 async_checkpointer.py:144] [process=3][thread=async_save] Background save thread done. Time taken: 51.899029s. I0419 03:58:03.541610 132307776157440 async_checkpointer.py:273] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save. I0419 03:58:03.541666 132307776157440 async_checkpointer.py:283] [process=3][thread=save_finalize] No errors found in background save thread=async_save. I0419 03:58:03.541720 132307776157440 checkpoint_manager.py:2133] [process=3][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0419 03:58:03.544515 132307776157440 checkpoint_manager.py:2142] [process=3][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0419 03:58:03.544683 132434841487168 checkpoint_manager.py:2036] [process=3][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9. I0419 03:58:03.544831 132434841487168 checkpoint_manager.py:2013] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0419 03:58:03.545504 132434841487168 metric_logger.py:185] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.142, Tokens/s/device: 13888.701, total_weights: 65536, loss: 8.179 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Sun Apr 19 03:58:14 UTC 2026 EXIT_CODE=0