XPK Start: Thu Apr 23 15:29:38 UTC 2026 PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used. `rope_parameters`'s factor field must be a float >= 1, got 40 `rope_parameters`'s beta_fast field must be a float, got 32 `rope_parameters`'s beta_slow field must be a float, got 1 DeepseekV32Config got `key=rope_scaling` in kwargs but hasn't set it as attribute. For RoPE standardization you need to set `self.rope_parameters` in model's config. 2026-04-23 15:30:03.925513: 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) I0423 15:30:04.136573 140294024329024 max_utils.py:273] Attempting to initialize the jax distributed system... I0423 15:30:13.178643 140294024329024 distributed.py:149] Starting JAX distributed service on [::]:8482 I0423 15:30:13.181330 140294024329024 distributed.py:172] Connecting to JAX distributed service on mt-15-ocdbt-false-rs-w476r-slice-job-0-0.mt-15-ocdbt-false-rs-w476r:8482 I0423 15:30:14.183934 140294024329024 max_utils.py:284] Jax distributed system initialized! I0423 15:30:20.165188 140294024329024 max_utils.py:800] System Information: Jax Version: 0.9.2 I0423 15:30:20.165292 140294024329024 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0423 15:30:20.165339 140294024329024 max_utils.py:802] System Information: Jax Backend: PJRT C API TFRT TPU v6 lite Built on Mar 4 2026 11:32:08 (1772652728) cl/878335365 I0423 15:30:20.165377 140294024329024 train_utils.py:391] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0423 15:30:20.865503 140294024329024 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0423 15:30:20.978349 140294024329024 checkpointing.py:688] Setting up checkpoint logger... I0423 15:30:20.978470 140294024329024 checkpointing.py:234] Creating checkpoint manager with ocdbt=False and zarr3=True I0423 15:30:20.978519 140294024329024 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0423 15:30:20.978722 140294024329024 base_pytree_checkpoint_handler.py:441] 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 0x7f9807d53260>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0423 15:30:22.265570 140294024329024 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0423 15:30:22.265806 140294024329024 checkpoint_manager.py:708] [process=6][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7f82c06207d0>}, handler_registry=None I0423 15:30:22.266043 140294024329024 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7f82c06207d0>` 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`. I0423 15:30:22.266102 140294024329024 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7f82e04b5d60>` 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`. I0423 15:30:22.266140 140294024329024 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 0x7f82c06207d0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7f82c06207d0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7f82e04b5d60>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7f82e04b5d60>}). I0423 15:30:22.266472 140294024329024 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0423 15:30:22.266542 140294024329024 async_checkpointer.py:192] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7f82e04576a0> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0423 15:30:23.858667 140172398147328 checkpoint.py:228] Read Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776958064782160169, 'commit_timestamp_nsecs': 1776958080285959536, 'custom_metadata': {}} from gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints/5/_CHECKPOINT_METADATA I0423 15:30:24.112648 140172398147328 checkpoint_manager.py:1871] Missing metrics for step 5 I0423 15:30:24.292191 140294024329024 checkpoint_manager.py:1812] Found 3 checkpoint steps in gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints I0423 15:30:25.007205 140294024329024 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/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7f82e0437440> I0423 15:30:25.007388 140294024329024 checkpointing.py:302] Checkpoint manager created! I0423 15:30:25.973601 140294024329024 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0423 15:30:25.973723 140294024329024 checkpointing.py:582] restoring from this run's directory step 9 I0423 15:30:26.234836 140294024329024 event_tracking.py:70] [process=6] [sync] Started load checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints/9. I0423 15:30:26.488647 140294024329024 checkpointer.py:307] Restoring checkpoint from gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints/9. I0423 15:30:26.489062 140294024329024 event_tracking.py:125] [process=6] [sync] Finished blocking load in 0.25 seconds. Continuing load @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints/9. I0423 15:30:29.385771 1490 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0423 15:30:38.473613 140294024329024 jax_array_handlers.py:843] [process=6] /jax/orbax/read/worker/io/requested throughput: 151.931 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 10.401270627975464 s) (per-host) I0423 15:30:38.483510 140294024329024 base_pytree_checkpoint_handler.py:130] [process=6] /jax/checkpoint/read/gbytes_per_sec: 146.191 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 10.82563591003418 s) (per-host) I0423 15:30:39.903870 140294024329024 event_tracking.py:138] [process=6] [sync] Finished load in 13.67 seconds @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints/9 I0423 15:30:39.904031 140294024329024 standard_logger.py:34] {'step': 9, 'event_type': 'restore', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints', 'checkpointer_start_time': 1776958226.2347407, 'checkpointer_duration_secs': 13.669259071350098, 'checkpoint_manager_start_time': 1776958225.9743397, 'checkpoint_manager_duration_secs': 13.929661989212036} fsdp: 32 I0423 15:30:39.980388 140294024329024 maxtext_utils.py:1889] decoder/decoder_norm/scale/value Shape: float32[2048] Physical: (None,) I0423 15:30:39.980505 140294024329024 maxtext_utils.py:1889] decoder/layers/mlp/wi_0/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0423 15:30:39.980556 140294024329024 maxtext_utils.py:1889] decoder/layers/mlp/wi_1/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0423 15:30:39.980597 140294024329024 maxtext_utils.py:1889] decoder/layers/mlp/wo/kernel/value Shape: float32[7168,16,2048] Physical: (None, None, 'fsdp') I0423 15:30:39.980635 140294024329024 maxtext_utils.py:1889] decoder/layers/post_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0423 15:30:39.980669 140294024329024 maxtext_utils.py:1889] decoder/layers/pre_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0423 15:30:39.980704 140294024329024 maxtext_utils.py:1889] decoder/layers/self_attention/key/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0423 15:30:39.980738 140294024329024 maxtext_utils.py:1889] decoder/layers/self_attention/out/kernel/value Shape: float32[16,16,128,2048] Physical: (None, None, None, 'fsdp') I0423 15:30:39.980771 140294024329024 maxtext_utils.py:1889] decoder/layers/self_attention/query/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0423 15:30:39.980804 140294024329024 maxtext_utils.py:1889] decoder/layers/self_attention/value/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0423 15:30:39.980836 140294024329024 maxtext_utils.py:1889] decoder/logits_dense/kernel/value Shape: float32[2048,32000] Physical: ('fsdp', None) I0423 15:30:39.980867 140294024329024 maxtext_utils.py:1889] token_embedder/embedding/value Shape: float32[32000,2048] Physical: (None, 'fsdp') I0423 15:30:40.391845 140294024329024 nnx_decoders.py:465] nnx_decoders/carry Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0423 15:30:40.391951 140294024329024 nnx_decoders.py:465] nnx_decoders/carry Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 15:30:40.397464 140294024329024 nnx_decoders.py:465] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0423 15:30:40.397520 140294024329024 nnx_decoders.py:465] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 15:30:40.414088 140294024329024 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 15:30:40.414165 140294024329024 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 15:30:40.430089 140294024329024 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 15:30:40.430161 140294024329024 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 15:30:40.454165 140294024329024 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 15:30:40.454233 140294024329024 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 15:30:40.470193 140294024329024 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 15:30:40.470254 140294024329024 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 15:30:40.486067 140294024329024 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 15:30:40.486140 140294024329024 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 15:30:40.515738 140294024329024 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0423 15:30:40.515810 140294024329024 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 15:30:40.535718 140294024329024 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0423 15:30:40.535789 140294024329024 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0423 15:30:51.701134 140294024329024 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. I0423 15:30:51.703508 140294024329024 metric_logger.py:301] number parameters: 1.104 billion I0423 15:31:03.029270 140294024329024 checkpointing.py:794] Waiting for step 10 to finish before checkpoint... I0423 15:31:03.180751 140294024329024 checkpointing.py:798] Waited 0.15147185325622559 seconds for step 10 to finish before starting checkpointing. I0423 15:31:03.183437 140294024329024 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 15:31:03.185355 140294024329024 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 10 I0423 15:31:03.186996 140294024329024 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints/10. I0423 15:31:03.526122 140294024329024 signaling_client.py:364] Using JaxDistributedSignalingClient I0423 15:31:03.527151 140294024329024 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array. I0423 15:31:03.527214 140294024329024 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 I0423 15:31:03.801257 140294024329024 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.275933s I0423 15:31:03.801422 140294024329024 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.452 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28296327590942383 s) (per-host) I0423 15:31:03.801474 140294024329024 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.283026s (batch_requests_ready=0.002695s, total_serialization_initiated=0.280260s, others=0.000071s) I0423 15:31:03.801565 140294024329024 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.287050s (all_items=0.000018s, per_item={'items': '0.00001764'}, temp_paths=0.287033) I0423 15:31:03.802278 140294024329024 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.62 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints/10. I0423 15:31:03.802628 140169126598400 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 15:51:03.802589 I0423 15:31:03.815667 140294024329024 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize I0423 15:31:03.815978 140169109812992 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0423 15:31:03.816141 140294024329024 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776958263.183419, 'wait_for_prev_duration_secs': 6.222724914550781e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776958263.1853948, 'checkpointer_blocking_duration_secs': 0.6173946857452393, 'get_old_steps_start_time': 1776958263.8028128, 'get_old_steps_duration_secs': 3.1948089599609375e-05, 'checkpoint_manager_blocking_start_time': 1776958263.1811295, 'checkpoint_manager_blocking_duration_secs': 0.6349766254425049} I0423 15:31:03.816251 140294024329024 checkpointing.py:409] Started an asynchronous checkpoint save for step 10 I0423 15:31:03.816325 140294024329024 max_utils.py:750] Memstats: After params initialized: I0423 15:31:03.816377 140294024329024 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0)) I0423 15:31:03.816414 140294024329024 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0)) I0423 15:31:03.816442 140294024329024 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0)) I0423 15:31:03.816465 140294024329024 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0)) I0423 15:31:04.136439 140294024329024 metric_logger.py:196] completed step: 10, seconds: 11.325, TFLOP/s/device: 1.200, Tokens/s/device: 180.844, total_weights: 65536, loss: 6.827, lm_loss: 6.827, perplexity: 922.537 I0423 15:31:04.705573 140294024329024 metric_logger.py:196] completed step: 11, seconds: 1.105, TFLOP/s/device: 12.293, Tokens/s/device: 1852.899, total_weights: 65536, loss: 6.522, lm_loss: 6.522, perplexity: 679.821 I0423 15:31:04.853033 140294024329024 metric_logger.py:196] completed step: 12, seconds: 0.420, TFLOP/s/device: 32.322, Tokens/s/device: 4871.887, total_weights: 65536, loss: 6.260, lm_loss: 6.260, perplexity: 523.013 I0423 15:31:05.000740 140294024329024 metric_logger.py:196] completed step: 13, seconds: 0.157, TFLOP/s/device: 86.678, Tokens/s/device: 13065.057, total_weights: 65536, loss: 6.039, lm_loss: 6.039, perplexity: 419.520 I0423 15:31:05.007186 140294024329024 checkpointing.py:794] Waiting for step 15 to finish before checkpoint... I0423 15:31:05.295476 140294024329024 checkpointing.py:798] Waited 0.28825998306274414 seconds for step 15 to finish before starting checkpointing. I0423 15:31:05.298160 140294024329024 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 15:31:08.647782 140169134991104 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints/10/items/array_metadatas/process_6 I0423 15:31:13.913964 140169126598400 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 151.950 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 10.39547085762024 s) (per-host) I0423 15:31:13.914091 140169126598400 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 10.111348s. I0423 15:31:20.390703 140169126598400 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 16.587944s. I0423 15:31:20.390987 140169109812992 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 15:31:20.391113 140169109812992 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0423 15:31:20.391163 140169109812992 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts... I0423 15:31:20.393567 140169109812992 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts. I0423 15:31:20.393753 140294024329024 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=10][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=10. W0423 15:31:20.393886 140294024329024 checkpoint_manager.py:1452] Waiting for previous save to complete took 15.095725 seconds. If this number is high, consider checkpointing less frequently. I0423 15:31:20.395789 140294024329024 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 15 I0423 15:31:20.398265 140294024329024 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints/15. I0423 15:31:20.708122 140294024329024 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array. I0423 15:31:20.708214 140294024329024 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 I0423 15:31:20.748302 140294024329024 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.041766s I0423 15:31:20.748471 140294024329024 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 31.334 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.049230098724365234 s) (per-host) I0423 15:31:20.748530 140294024329024 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.049299s (batch_requests_ready=0.003144s, total_serialization_initiated=0.046077s, others=0.000077s) I0423 15:31:20.748630 140294024329024 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.054397s (all_items=0.000014s, per_item={'items': '0.00001359'}, temp_paths=0.054384) I0423 15:31:20.749289 140294024329024 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.35 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints/15. I0423 15:31:20.749584 140165376894720 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 15:51:20.749549 I0423 15:31:20.757217 140294024329024 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=15] Starting CheckpointManager Save Finalize thread=save_finalize I0423 15:31:20.757514 140169109812992 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0423 15:31:20.757671 140294024329024 standard_logger.py:34] {'step': 15, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776958265.2981305, 'wait_for_prev_duration_secs': 15.095724821090698, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776958280.3958287, 'checkpointer_blocking_duration_secs': 0.3539009094238281, 'get_old_steps_start_time': 1776958280.7497516, 'get_old_steps_duration_secs': 2.9087066650390625e-05, 'checkpoint_manager_blocking_start_time': 1776958265.2959678, 'checkpoint_manager_blocking_duration_secs': 15.461670875549316} I0423 15:31:20.757781 140294024329024 checkpointing.py:409] Started an asynchronous checkpoint save for step 15 I0423 15:31:20.758816 140294024329024 metric_logger.py:196] completed step: 14, seconds: 0.147, TFLOP/s/device: 92.313, Tokens/s/device: 13914.461, total_weights: 65536, loss: 5.858, lm_loss: 5.858, perplexity: 350.067 I0423 15:31:20.766600 140294024329024 metric_logger.py:196] completed step: 15, seconds: 0.148, TFLOP/s/device: 91.780, Tokens/s/device: 13834.099, total_weights: 65536, loss: 5.713, lm_loss: 5.713, perplexity: 302.780 I0423 15:31:26.433704 140169134991104 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints/15/items/array_metadatas/process_6 I0423 15:31:31.468221 140165376894720 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 146.681 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 10.768940210342407 s) (per-host) I0423 15:31:31.468347 140165376894720 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 10.718649s. I0423 15:31:37.369596 140165376894720 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 16.619882s. I0423 15:31:37.369897 140169109812992 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 15:31:37.370018 140169109812992 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0423 15:31:37.370066 140169109812992 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=15] CheckpointManager Save Finalize is syncing with other hosts... I0423 15:31:37.371494 140169109812992 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=15] CheckpointManager Save Finalize is done on all hosts. I0423 15:31:42.503203 140294024329024 metric_logger.py:196] completed step: 16, seconds: 15.758, TFLOP/s/device: 0.862, Tokens/s/device: 129.969, total_weights: 65536, loss: 5.599, lm_loss: 5.599, perplexity: 270.201 I0423 15:31:42.650623 140294024329024 metric_logger.py:196] completed step: 17, seconds: 21.591, TFLOP/s/device: 0.629, Tokens/s/device: 94.852, total_weights: 65536, loss: 5.511, lm_loss: 5.511, perplexity: 247.443 I0423 15:31:42.798475 140294024329024 metric_logger.py:196] completed step: 18, seconds: 0.153, TFLOP/s/device: 88.798, Tokens/s/device: 13384.659, total_weights: 65536, loss: 5.442, lm_loss: 5.442, perplexity: 230.909 I0423 15:31:42.947025 140294024329024 checkpointing.py:794] Waiting for step 19 to finish before checkpoint... I0423 15:31:42.947734 140294024329024 checkpointing.py:798] Waited 0.0007216930389404297 seconds for step 19 to finish before starting checkpointing. I0423 15:31:42.949689 140294024329024 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 15:31:42.951440 140294024329024 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 19 I0423 15:31:42.952901 140294024329024 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints/19. I0423 15:31:43.275386 140294024329024 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array. I0423 15:31:43.275558 140294024329024 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 I0423 15:31:43.310793 140294024329024 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.036952s I0423 15:31:43.310958 140294024329024 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 34.819 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.044302940368652344 s) (per-host) I0423 15:31:43.311007 140294024329024 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.044362s (batch_requests_ready=0.002857s, total_serialization_initiated=0.041440s, others=0.000065s) I0423 15:31:43.311115 140294024329024 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.048461s (all_items=0.000014s, per_item={'items': '0.00001431'}, temp_paths=0.048447) I0423 15:31:43.311826 140294024329024 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.36 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints/19. I0423 15:31:43.312170 140169109812992 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 15:51:43.312134 I0423 15:31:43.314195 140294024329024 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize I0423 15:31:43.314495 140164823238400 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0423 15:31:43.314663 140294024329024 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776958302.9496577, 'wait_for_prev_duration_secs': 7.104873657226562e-05, 'time_between_consecutive_saves_sec': 5.578124761581421, 'checkpointer_blocking_start_time': 1776958302.9514778, 'checkpointer_blocking_duration_secs': 0.360851526260376, 'get_old_steps_start_time': 1776958303.3123484, 'get_old_steps_duration_secs': 2.574920654296875e-05, 'checkpoint_manager_blocking_start_time': 1776958302.9479704, 'checkpoint_manager_blocking_duration_secs': 0.3666560649871826} I0423 15:31:43.314780 140294024329024 checkpointing.py:409] Started an asynchronous checkpoint save for step 19 I0423 15:31:43.314832 140294024329024 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 15:31:48.442444 140169134991104 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/nnx_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints/19/items/array_metadatas/process_6 I0423 15:31:53.297667 140169109812992 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 157.472 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 10.030972003936768 s) (per-host) I0423 15:31:53.297790 140169109812992 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 9.985492s. I0423 15:31:59.191484 140169109812992 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 15.879175s. I0423 15:31:59.191765 140164823238400 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 15:31:59.191879 140164823238400 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0423 15:31:59.191923 140164823238400 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts... I0423 15:31:59.193330 140164823238400 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts. I0423 15:31:59.193506 140294024329024 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=19][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=19. I0423 15:31:59.193677 140294024329024 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 15:31:59.194679 140294024329024 metric_logger.py:196] completed step: 19, seconds: 0.148, TFLOP/s/device: 91.923, Tokens/s/device: 13855.625, total_weights: 65536, loss: 5.385, lm_loss: 5.385, perplexity: 218.045 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Thu Apr 23 15:32:09 UTC 2026 EXIT_CODE=0