XPK Start: Thu Apr 23 13:59:31 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 13:59:56.157151: 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 13:59:56.367885 134258596198208 max_utils.py:273] Attempting to initialize the jax distributed system... I0423 14:00:05.409040 134258596198208 distributed.py:149] Starting JAX distributed service on [::]:8482 I0423 14:00:05.411485 134258596198208 distributed.py:172] Connecting to JAX distributed service on mt-15-ocdbt-false-rs-f1pwv-slice-job-0-0.mt-15-ocdbt-false-rs-f1pwv:8482 I0423 14:00:06.261380 134258596198208 max_utils.py:284] Jax distributed system initialized! I0423 14:00:12.549255 134258596198208 max_utils.py:800] System Information: Jax Version: 0.9.2 I0423 14:00:12.549361 134258596198208 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0423 14:00:12.549402 134258596198208 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 14:00:12.549437 134258596198208 train_utils.py:391] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0423 14:00:13.244014 134258596198208 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0423 14:00:13.244625 134258596198208 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0423 14:00:13.244805 134258596198208 checkpointing.py:688] Setting up checkpoint logger... I0423 14:00:13.244855 134258596198208 checkpointing.py:234] Creating checkpoint manager with ocdbt=False and zarr3=True I0423 14:00:13.244899 134258596198208 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0423 14:00:13.245267 134258596198208 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 0x7a1ae61f3800>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0423 14:00:14.541479 134258596198208 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0423 14:00:14.541717 134258596198208 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 0x7a068c5a9190>}, handler_registry=None I0423 14:00:14.541966 134258596198208 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7a068c5a9190>` 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 14:00:14.542016 134258596198208 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a068c20df10>` 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 14:00:14.542053 134258596198208 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 0x7a068c5a9190>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7a068c5a9190>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a068c20df10>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a068c20df10>}). I0423 14:00:14.542407 134258596198208 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0423 14:00:14.542476 134258596198208 async_checkpointer.py:192] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7a05ac4fdd00> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0423 14:00:16.524742 134137088288512 checkpoint.py:228] Read Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776952686455490192, 'commit_timestamp_nsecs': 1776952700293800672, 'custom_metadata': {}} from gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints/9/_CHECKPOINT_METADATA I0423 14:00:16.780022 134137088288512 checkpoint_manager.py:1871] Missing metrics for step 9 I0423 14:00:17.178446 134258596198208 checkpoint_manager.py:1812] Found 3 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints I0423 14:00:17.563425 134258596198208 checkpoint_manager.py:929] [process=6][thread=MainThread] CheckpointManager created, primary_host=0, CheckpointManagerOptions=CheckpointManagerOptions(save_interval_steps=1, max_to_keep=None, keep_time_interval=None, keep_period=None, should_keep_fn=None, best_fn=None, best_mode='max', keep_checkpoints_without_metrics=True, step_prefix=None, step_format_fixed_length=None, step_name_format=None, create=True, cleanup_tmp_directories=False, save_on_steps=frozenset(), single_host_load_and_broadcast=False, todelete_subdir=None, todelete_full_path=None, enable_background_delete=False, read_only=False, enable_async_checkpointing=True, async_options=None, multiprocessing_options=MultiprocessingOptions(primary_host=0, active_processes=None, barrier_sync_key_prefix=None), should_save_fn=None, file_options=FileOptions(path_permission_mode=None), save_root_metadata=True, temporary_path_class=None, save_decision_policy=FixedIntervalPolicy(interval=5), preservation_policy=LatestN(n=None), prevent_write_metrics=False, enable_should_save_is_saving_in_progress_check=True, enable_per_process_directory_creation=False, lightweight_initialize=False), root_directory=gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7a068c209910> I0423 14:00:17.563600 134258596198208 checkpointing.py:302] Checkpoint manager created! I0423 14:00:18.519014 134258596198208 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0423 14:00:18.519287 134258596198208 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 14:00:18.901758 134258596198208 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 14:00:18.901855 134258596198208 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 14:00:18.918233 134258596198208 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 14:00:18.918296 134258596198208 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 14:00:18.942229 134258596198208 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 14:00:18.942304 134258596198208 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 14:00:18.958861 134258596198208 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 14:00:18.958932 134258596198208 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 14:00:18.975449 134258596198208 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 14:00:18.975512 134258596198208 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 14:00:19.000318 134258596198208 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0423 14:00:19.000387 134258596198208 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 14:00:19.021287 134258596198208 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0423 14:00:19.021353 134258596198208 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0423 14:00:19.243793 134258596198208 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0423 14:00:19.243907 134258596198208 checkpointing.py:582] restoring from this run's directory step 9 I0423 14:00:19.501167 134258596198208 event_tracking.py:70] [process=6] [sync] Started load checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints/9. I0423 14:00:19.740311 134258596198208 checkpointer.py:307] Restoring checkpoint from gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints/9. I0423 14:00:19.740730 134258596198208 event_tracking.py:125] [process=6] [sync] Finished blocking load in 0.24 seconds. Continuing load @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints/9. I0423 14:00:22.373909 1489 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0423 14:00:32.402294 134258596198208 jax_array_handlers.py:843] [process=6] /jax/orbax/read/worker/io/requested throughput: 142.004 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 11.12834644317627 s) (per-host) I0423 14:00:32.409261 134258596198208 base_pytree_checkpoint_handler.py:130] [process=6] /jax/checkpoint/read/gbytes_per_sec: 137.279 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 11.528326272964478 s) (per-host) I0423 14:00:32.418787 134258596198208 event_tracking.py:138] [process=6] [sync] Finished load in 12.92 seconds @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints/9 I0423 14:00:32.418893 134258596198208 standard_logger.py:34] {'step': 9, 'event_type': 'restore', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints', 'checkpointer_start_time': 1776952819.5010574, 'checkpointer_duration_secs': 12.917805910110474, 'checkpoint_manager_start_time': 1776952819.244168, 'checkpoint_manager_duration_secs': 13.174697637557983} fsdp: 32 I0423 14:00:32.836907 134258596198208 maxtext_utils.py:1880] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0423 14:00:32.837038 134258596198208 maxtext_utils.py:1880] params/params/decoder/layers/mlp/wi_0/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0423 14:00:32.837103 134258596198208 maxtext_utils.py:1880] params/params/decoder/layers/mlp/wi_1/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0423 14:00:32.837164 134258596198208 maxtext_utils.py:1880] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: P('mlp', 'layers', 'embed') Physical: (None, None, 'fsdp') I0423 14:00:32.837217 134258596198208 maxtext_utils.py:1880] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0423 14:00:32.837253 134258596198208 maxtext_utils.py:1880] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0423 14:00:32.837305 134258596198208 maxtext_utils.py:1880] 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) I0423 14:00:32.837357 134258596198208 maxtext_utils.py:1880] 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') I0423 14:00:32.837396 134258596198208 maxtext_utils.py:1880] 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) I0423 14:00:32.837431 134258596198208 maxtext_utils.py:1880] 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) I0423 14:00:32.837477 134258596198208 maxtext_utils.py:1880] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0423 14:00:32.837520 134258596198208 maxtext_utils.py:1880] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0423 14:00:33.328613 134258596198208 train.py:157] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0423 14:00:33.328708 134258596198208 train.py:157] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0423 14:00:33.344295 134258596198208 train.py:164] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0423 14:00:33.344353 134258596198208 train.py:164] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0423 14:00:44.403147 134258596198208 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 14:00:44.404041 134258596198208 metric_logger.py:301] number parameters: 1.104 billion I0423 14:00:55.815464 134258596198208 checkpointing.py:794] Waiting for step 10 to finish before checkpoint... I0423 14:00:55.968390 134258596198208 checkpointing.py:798] Waited 0.15290522575378418 seconds for step 10 to finish before starting checkpointing. I0423 14:00:55.971727 134258596198208 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 14:00:55.973725 134258596198208 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 10 I0423 14:00:55.975621 134258596198208 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints/10. I0423 14:00:56.342109 134258596198208 signaling_client.py:364] Using JaxDistributedSignalingClient I0423 14:00:56.343014 134258596198208 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0423 14:00:56.343075 134258596198208 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 14:00:56.617864 134258596198208 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.275842s I0423 14:00:56.618032 134258596198208 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.514 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2797374725341797 s) (per-host) I0423 14:00:56.618085 134258596198208 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.279801s (batch_requests_ready=0.002226s, total_serialization_initiated=0.277503s, others=0.000072s) I0423 14:00:56.618224 134258596198208 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.284158s (all_items=0.000019s, per_item={'items': '0.00001907'}, temp_paths=0.284138) I0423 14:00:56.619012 134258596198208 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.65 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints/10. I0423 14:00:56.619369 134134328432384 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 14:20:56.619332 I0423 14:00:56.628544 134258596198208 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize I0423 14:00:56.628863 134133288261376 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0423 14:00:56.629018 134258596198208 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_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': 1776952855.971709, 'wait_for_prev_duration_secs': 6.103515625e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776952855.9737628, 'checkpointer_blocking_duration_secs': 0.6457657814025879, 'get_old_steps_start_time': 1776952856.6195524, 'get_old_steps_duration_secs': 3.314018249511719e-05, 'checkpoint_manager_blocking_start_time': 1776952855.9688368, 'checkpoint_manager_blocking_duration_secs': 0.6601450443267822} I0423 14:00:56.629153 134258596198208 checkpointing.py:409] Started an asynchronous checkpoint save for step 10 I0423 14:00:56.629205 134258596198208 max_utils.py:750] Memstats: After params initialized: I0423 14:00:56.629256 134258596198208 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0)) I0423 14:00:56.629295 134258596198208 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0)) I0423 14:00:56.629322 134258596198208 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0)) I0423 14:00:56.629347 134258596198208 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0)) I0423 14:00:56.944363 134258596198208 metric_logger.py:196] completed step: 10, seconds: 11.411, TFLOP/s/device: 1.191, Tokens/s/device: 179.471, total_weights: 65536, loss: 6.833, lm_loss: 6.833, perplexity: 927.869 I0423 14:00:57.135383 134258596198208 metric_logger.py:196] completed step: 11, seconds: 1.127, TFLOP/s/device: 12.052, Tokens/s/device: 1816.598, total_weights: 65536, loss: 6.527, lm_loss: 6.527, perplexity: 683.659 I0423 14:00:57.282915 134258596198208 metric_logger.py:196] completed step: 12, seconds: 0.044, TFLOP/s/device: 310.847, Tokens/s/device: 46854.267, total_weights: 65536, loss: 6.265, lm_loss: 6.265, perplexity: 526.068 I0423 14:00:57.430227 134258596198208 metric_logger.py:196] completed step: 13, seconds: 0.153, TFLOP/s/device: 88.626, Tokens/s/device: 13358.642, total_weights: 65536, loss: 6.045, lm_loss: 6.045, perplexity: 422.001 I0423 14:00:57.434777 134258596198208 checkpointing.py:794] Waiting for step 15 to finish before checkpoint... I0423 14:00:57.724435 134258596198208 checkpointing.py:798] Waited 0.28962206840515137 seconds for step 15 to finish before starting checkpointing. I0423 14:00:57.727525 134258596198208 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 14:01:01.520308 134133791561472 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints/10/items/array_metadatas/process_6 I0423 14:01:06.945744 134134328432384 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 148.914 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 10.607410430908203 s) (per-host) I0423 14:01:06.945873 134134328432384 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 10.326389s. I0423 14:01:13.196558 134134328432384 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 16.577050s. I0423 14:01:13.196836 134133288261376 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 14:01:13.196955 134133288261376 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0423 14:01:13.197003 134133288261376 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts... I0423 14:01:13.199489 134133288261376 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts. I0423 14:01:13.199665 134258596198208 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 14:01:13.199802 134258596198208 checkpoint_manager.py:1452] Waiting for previous save to complete took 15.472279 seconds. If this number is high, consider checkpointing less frequently. I0423 14:01:13.201792 134258596198208 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 15 I0423 14:01:13.204348 134258596198208 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints/15. I0423 14:01:13.901056 134258596198208 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0423 14:01:13.901163 134258596198208 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 14:01:13.926431 134258596198208 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.026587s I0423 14:01:13.926612 134258596198208 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 51.221 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.03011631965637207 s) (per-host) I0423 14:01:13.926667 134258596198208 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.030181s (batch_requests_ready=0.001868s, total_serialization_initiated=0.028240s, others=0.000073s) I0423 14:01:13.926761 134258596198208 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.035227s (all_items=0.000013s, per_item={'items': '0.00001311'}, temp_paths=0.035214) I0423 14:01:13.927478 134258596198208 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.73 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints/15. I0423 14:01:13.927773 134133288261376 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 14:21:13.927748 I0423 14:01:13.940352 134258596198208 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=15] Starting CheckpointManager Save Finalize thread=save_finalize I0423 14:01:13.940609 134133799954176 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0423 14:01:13.940740 134258596198208 standard_logger.py:34] {'step': 15, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_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': 1776952857.7274919, 'wait_for_prev_duration_secs': 15.472278594970703, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776952873.2018313, 'checkpointer_blocking_duration_secs': 0.7260599136352539, 'get_old_steps_start_time': 1776952873.9279163, 'get_old_steps_duration_secs': 3.218650817871094e-05, 'checkpoint_manager_blocking_start_time': 1776952857.7250664, 'checkpoint_manager_blocking_duration_secs': 16.215639114379883} I0423 14:01:13.940855 134258596198208 checkpointing.py:409] Started an asynchronous checkpoint save for step 15 I0423 14:01:13.941664 134258596198208 metric_logger.py:196] completed step: 14, seconds: 0.148, TFLOP/s/device: 92.112, Tokens/s/device: 13884.181, total_weights: 65536, loss: 5.864, lm_loss: 5.864, perplexity: 352.193 I0423 14:01:13.948404 134258596198208 metric_logger.py:196] completed step: 15, seconds: 0.147, TFLOP/s/device: 92.234, Tokens/s/device: 13902.560, total_weights: 65536, loss: 5.719, lm_loss: 5.719, perplexity: 304.661 I0423 14:01:19.322653 134133791561472 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints/15/items/array_metadatas/process_6 I0423 14:01:24.356919 134133288261376 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 151.008 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 10.460384845733643 s) (per-host) I0423 14:01:24.357040 134133288261376 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 10.429185s. I0423 14:01:30.122215 134133288261376 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 16.194344s. I0423 14:01:30.122456 134133799954176 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 14:01:30.122515 134133799954176 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0423 14:01:30.122584 134133799954176 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=15] CheckpointManager Save Finalize is syncing with other hosts... I0423 14:01:30.124089 134133799954176 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=15] CheckpointManager Save Finalize is done on all hosts. I0423 14:01:34.981664 134258596198208 metric_logger.py:196] completed step: 16, seconds: 16.512, TFLOP/s/device: 0.823, Tokens/s/device: 124.030, total_weights: 65536, loss: 5.605, lm_loss: 5.605, perplexity: 271.872 I0423 14:01:35.129587 134258596198208 metric_logger.py:196] completed step: 17, seconds: 20.887, TFLOP/s/device: 0.650, Tokens/s/device: 98.050, total_weights: 65536, loss: 5.517, lm_loss: 5.517, perplexity: 248.975 I0423 14:01:35.276635 134258596198208 metric_logger.py:196] completed step: 18, seconds: 0.152, TFLOP/s/device: 89.144, Tokens/s/device: 13436.821, total_weights: 65536, loss: 5.448, lm_loss: 5.448, perplexity: 232.333 I0423 14:01:35.423347 134258596198208 checkpointing.py:794] Waiting for step 19 to finish before checkpoint... I0423 14:01:35.423995 134258596198208 checkpointing.py:798] Waited 0.0006694793701171875 seconds for step 19 to finish before starting checkpointing. I0423 14:01:35.426124 134258596198208 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 14:01:35.427676 134258596198208 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 19 I0423 14:01:35.429236 134258596198208 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints/19. I0423 14:01:35.774466 134258596198208 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0423 14:01:35.774555 134258596198208 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 14:01:35.800538 134258596198208 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.026952s I0423 14:01:35.800709 134258596198208 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 50.602 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.030484437942504883 s) (per-host) I0423 14:01:35.800759 134258596198208 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.030545s (batch_requests_ready=0.001732s, total_serialization_initiated=0.028748s, others=0.000066s) I0423 14:01:35.800853 134258596198208 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.034556s (all_items=0.000011s, per_item={'items': '0.00001121'}, temp_paths=0.034545) I0423 14:01:35.801454 134258596198208 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.37 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints/19. I0423 14:01:35.801708 134128984901376 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 14:21:35.801682 I0423 14:01:35.805734 134258596198208 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize I0423 14:01:35.806014 134133799954176 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0423 14:01:35.806171 134258596198208 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_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': 1776952895.4260778, 'wait_for_prev_duration_secs': 8.893013000488281e-05, 'time_between_consecutive_saves_sec': 5.30192756652832, 'checkpointer_blocking_start_time': 1776952895.4277143, 'checkpointer_blocking_duration_secs': 0.3740968704223633, 'get_old_steps_start_time': 1776952895.8018258, 'get_old_steps_duration_secs': 2.193450927734375e-05, 'checkpoint_manager_blocking_start_time': 1776952895.424249, 'checkpoint_manager_blocking_duration_secs': 0.3818938732147217} I0423 14:01:35.806324 134258596198208 checkpointing.py:409] Started an asynchronous checkpoint save for step 19 I0423 14:01:35.806368 134258596198208 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 14:01:41.117636 134133791561472 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_15_ocdbt_false/checkpoints/19/items/array_metadatas/process_6 I0423 14:01:45.988807 134128984901376 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 154.581 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 10.218545913696289 s) (per-host) I0423 14:01:45.988931 134128984901376 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 10.187145s. I0423 14:01:51.034514 134128984901376 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 15.232711s. I0423 14:01:51.034789 134133799954176 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 14:01:51.034907 134133799954176 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0423 14:01:51.034949 134133799954176 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts... I0423 14:01:51.036366 134133799954176 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts. I0423 14:01:51.036568 134258596198208 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 14:01:51.036714 134258596198208 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 14:01:51.037660 134258596198208 metric_logger.py:196] completed step: 19, seconds: 0.147, TFLOP/s/device: 92.129, Tokens/s/device: 13886.629, total_weights: 65536, loss: 5.391, lm_loss: 5.391, perplexity: 219.349 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Thu Apr 23 14:02:01 UTC 2026 EXIT_CODE=0