XPK Start: Thu Apr 23 13:46:10 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 13:46:35.017998: 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 13:46:35.229197 140518658361152 max_utils.py:273] Attempting to initialize the jax distributed system... I0423 13:46:44.272010 140518658361152 distributed.py:149] Starting JAX distributed service on [::]:8482 I0423 13:46:44.274341 140518658361152 distributed.py:172] Connecting to JAX distributed service on mt-15-ocdbt-true-sv-dtbpc-slice-job-0-0.mt-15-ocdbt-true-sv-dtbpc:8482 I0423 13:46:45.540779 140518658361152 max_utils.py:284] Jax distributed system initialized! I0423 13:46:50.568911 140518658361152 max_utils.py:800] System Information: Jax Version: 0.9.2 I0423 13:46:50.569021 140518658361152 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0423 13:46:50.569061 140518658361152 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 13:46:50.569123 140518658361152 train_utils.py:391] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0423 13:46:51.261491 140518658361152 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0423 13:46:51.262074 140518658361152 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0423 13:46:51.262276 140518658361152 checkpointing.py:688] Setting up checkpoint logger... I0423 13:46:51.262329 140518658361152 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0423 13:46:51.262374 140518658361152 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0423 13:46:51.262717 140518658361152 base_pytree_checkpoint_handler.py:441] 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 0x7fcc5504c0b0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0423 13:46:54.218296 140518658361152 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0423 13:46:54.218530 140518658361152 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 0x7fcb485a7170>}, handler_registry=None I0423 13:46:54.218765 140518658361152 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7fcb485a7170>` 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 13:46:54.218813 140518658361152 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7fb8e84c46b0>` 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 13:46:54.218851 140518658361152 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 0x7fcb485a7170>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7fcb485a7170>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7fb8e84c46b0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7fb8e84c46b0>}). I0423 13:46:54.219203 140518658361152 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0423 13:46:54.219281 140518658361152 async_checkpointer.py:192] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7fb8d05a5e40> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0423 13:46:55.434903 140518658361152 checkpoint_manager.py:1812] Found 0 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_true/checkpoints I0423 13:46:55.468369 140518658361152 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_true/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7fb8e84c1ac0> I0423 13:46:55.468542 140518658361152 checkpointing.py:302] Checkpoint manager created! I0423 13:46:56.416733 140518658361152 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0423 13:46:56.416840 140518658361152 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 13:46:56.796234 140518658361152 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 13:46:56.796325 140518658361152 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 13:46:56.812718 140518658361152 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 13:46:56.812780 140518658361152 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 13:46:56.836752 140518658361152 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 13:46:56.836820 140518658361152 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 13:46:56.853269 140518658361152 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 13:46:56.853328 140518658361152 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 13:46:56.869879 140518658361152 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 13:46:56.869940 140518658361152 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 13:46:56.896451 140518658361152 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0423 13:46:56.896527 140518658361152 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 13:46:56.918138 140518658361152 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0423 13:46:56.918206 140518658361152 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0423 13:46:57.138787 140518658361152 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0423 13:46:57.138898 140518658361152 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0423 13:46:58.569073 140518658361152 maxtext_utils.py:1880] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0423 13:46:58.569229 140518658361152 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 13:46:58.569288 140518658361152 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 13:46:58.569343 140518658361152 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 13:46:58.569396 140518658361152 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 13:46:58.569444 140518658361152 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 13:46:58.569507 140518658361152 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 13:46:58.569563 140518658361152 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 13:46:58.569602 140518658361152 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 13:46:58.569638 140518658361152 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 13:46:58.569688 140518658361152 maxtext_utils.py:1880] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0423 13:46:58.569737 140518658361152 maxtext_utils.py:1880] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0423 13:46:59.066992 140518658361152 train.py:157] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0423 13:46:59.067091 140518658361152 train.py:157] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0423 13:46:59.082575 140518658361152 train.py:164] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0423 13:46:59.082636 140518658361152 train.py:164] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0423 13:47:10.130009 140518658361152 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 13:47:10.130764 140518658361152 metric_logger.py:301] number parameters: 1.104 billion I0423 13:47:21.784598 140518658361152 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0423 13:47:21.939184 140518658361152 checkpointing.py:798] Waited 0.15456414222717285 seconds for step 0 to finish before starting checkpointing. I0423 13:47:21.941457 140518658361152 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 13:47:21.943295 140518658361152 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 0 I0423 13:47:21.944736 140518658361152 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_true/checkpoints/0. I0423 13:47:22.996402 140518658361152 signaling_client.py:364] Using JaxDistributedSignalingClient I0423 13:47:22.997426 140518658361152 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0423 13:47:22.997490 140518658361152 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 13:47:23.283902 140518658361152 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.287581s I0423 13:47:23.284079 140518658361152 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 2.111 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.7308406829833984 s) (per-host) I0423 13:47:23.284147 140518658361152 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.730920s (batch_requests_ready=0.439960s, total_serialization_initiated=0.290873s, others=0.000087s) I0423 13:47:23.284286 140518658361152 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.735006s (all_items=0.000017s, per_item={'items': '0.00001740'}, temp_paths=0.734989) I0423 13:47:23.285179 140518658361152 event_tracking.py:125] [process=6] [async] Finished blocking save in 1.34 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_true/checkpoints/0. I0423 13:47:23.285479 140392188069632 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 14:07:23.285445 I0423 13:47:23.287547 140518658361152 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0423 13:47:23.287848 140392162891520 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0423 13:47:23.287976 140518658361152 standard_logger.py:34] {'step': 0, '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_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776952041.9414392, 'wait_for_prev_duration_secs': 5.9604644775390625e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776952041.9433336, 'checkpointer_blocking_duration_secs': 1.3423006534576416, 'get_old_steps_start_time': 1776952043.2856598, 'get_old_steps_duration_secs': 2.9802322387695312e-05, 'checkpoint_manager_blocking_start_time': 1776952041.9395974, 'checkpoint_manager_blocking_duration_secs': 1.3483340740203857} I0423 13:47:23.288089 140518658361152 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0423 13:47:23.288153 140518658361152 max_utils.py:750] Memstats: After params initialized: I0423 13:47:23.288206 140518658361152 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0)) I0423 13:47:23.288239 140518658361152 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0)) I0423 13:47:23.288268 140518658361152 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0)) I0423 13:47:23.288295 140518658361152 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0)) I0423 13:47:23.605458 140518658361152 metric_logger.py:196] completed step: 0, seconds: 11.654, TFLOP/s/device: 1.166, Tokens/s/device: 175.738, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875 I0423 13:47:23.775703 140518658361152 metric_logger.py:196] completed step: 1, seconds: 1.819, TFLOP/s/device: 7.469, Tokens/s/device: 1125.753, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875 I0423 13:47:24.184113 140518658361152 metric_logger.py:196] completed step: 2, seconds: 0.023, TFLOP/s/device: 587.526, Tokens/s/device: 88558.333, total_weights: 65536, loss: 10.560, lm_loss: 10.560, perplexity: 38547.719 I0423 13:47:24.331352 140518658361152 metric_logger.py:196] completed step: 3, seconds: 0.409, TFLOP/s/device: 33.239, Tokens/s/device: 5010.189, total_weights: 65536, loss: 9.980, lm_loss: 9.980, perplexity: 21590.506 I0423 13:47:24.335982 140518658361152 checkpointing.py:794] Waiting for step 5 to finish before checkpoint... I0423 13:47:24.625388 140518658361152 checkpointing.py:798] Waited 0.2893695831298828 seconds for step 5 to finish before starting checkpointing. I0423 13:47:24.628298 140518658361152 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 13:47:25.806223 2741 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0423 13:47:27.846423 140392171284224 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_true/checkpoints/0/items/array_metadatas/process_6 I0423 13:47:58.946416 140392188069632 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 43.404 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 36.39313817024231 s) (per-host) I0423 13:47:58.946541 140392188069632 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 35.660951s. I0423 13:48:08.958632 140392188069632 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 45.673025s. I0423 13:48:08.958911 140392162891520 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 13:48:08.959035 140392162891520 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0423 13:48:08.959086 140392162891520 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0423 13:48:08.960728 140392162891520 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0423 13:48:08.960867 140518658361152 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0. W0423 13:48:08.960955 140518658361152 checkpoint_manager.py:1452] Waiting for previous save to complete took 44.332659 seconds. If this number is high, consider checkpointing less frequently. I0423 13:48:08.963069 140518658361152 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 5 I0423 13:48:08.965693 140518658361152 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_true/checkpoints/5. I0423 13:48:09.256260 140518658361152 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0423 13:48:09.256353 140518658361152 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 13:48:09.289917 140518658361152 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.034719s I0423 13:48:09.290064 140518658361152 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 40.418 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.03816533088684082 s) (per-host) I0423 13:48:09.290125 140518658361152 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.038235s (batch_requests_ready=0.001775s, total_serialization_initiated=0.036383s, others=0.000077s) I0423 13:48:09.290209 140518658361152 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.043337s (all_items=0.000015s, per_item={'items': '0.00001454'}, temp_paths=0.043322) I0423 13:48:09.290906 140518658361152 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.33 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_true/checkpoints/5. I0423 13:48:09.291209 140392162891520 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 14:08:09.291177 I0423 13:48:09.300852 140518658361152 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=5] Starting CheckpointManager Save Finalize thread=save_finalize I0423 13:48:09.301140 140365352916736 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0423 13:48:09.301309 140518658361152 standard_logger.py:34] {'step': 5, '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_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776952044.6282685, 'wait_for_prev_duration_secs': 44.33265948295593, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776952088.9631245, 'checkpointer_blocking_duration_secs': 0.32822322845458984, 'get_old_steps_start_time': 1776952089.291369, 'get_old_steps_duration_secs': 3.147125244140625e-05, 'checkpoint_manager_blocking_start_time': 1776952044.626005, 'checkpoint_manager_blocking_duration_secs': 44.67526412010193} I0423 13:48:09.301416 140518658361152 checkpointing.py:409] Started an asynchronous checkpoint save for step 5 I0423 13:48:09.302205 140518658361152 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.786, Tokens/s/device: 13382.822, total_weights: 65536, loss: 9.460, lm_loss: 9.460, perplexity: 12840.355 I0423 13:48:09.308198 140518658361152 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.348, Tokens/s/device: 13919.663, total_weights: 65536, loss: 8.959, lm_loss: 8.959, perplexity: 7776.467 I0423 13:48:14.789467 140392171284224 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_true/checkpoints/5/items/array_metadatas/process_6 I0423 13:48:31.930358 140518658361152 metric_logger.py:196] completed step: 6, seconds: 44.971, TFLOP/s/device: 0.302, Tokens/s/device: 45.541, total_weights: 65536, loss: 8.469, lm_loss: 8.469, perplexity: 4762.740 I0423 13:48:32.077722 140518658361152 metric_logger.py:196] completed step: 7, seconds: 22.476, TFLOP/s/device: 0.605, Tokens/s/device: 91.118, total_weights: 65536, loss: 8.003, lm_loss: 8.003, perplexity: 2989.151 I0423 13:48:32.225234 140518658361152 metric_logger.py:196] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.323, Tokens/s/device: 13463.675, total_weights: 65536, loss: 7.572, lm_loss: 7.572, perplexity: 1943.098 I0423 13:48:32.371920 140518658361152 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0423 13:48:32.372619 140518658361152 checkpointing.py:798] Waited 0.0007176399230957031 seconds for step 9 to finish before starting checkpointing. I0423 13:48:32.374614 140518658361152 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=5][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 13:48:51.163468 140392162891520 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 37.689 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.91152787208557 s) (per-host) I0423 13:48:51.163606 140392162891520 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.872287s. I0423 13:48:59.601363 140392162891520 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 50.310028s. I0423 13:48:59.601657 140365352916736 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 13:48:59.601778 140365352916736 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0423 13:48:59.601828 140365352916736 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=5] CheckpointManager Save Finalize is syncing with other hosts... I0423 13:48:59.603305 140365352916736 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=5] CheckpointManager Save Finalize is done on all hosts. I0423 13:48:59.603499 140518658361152 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=5][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=5. W0423 13:48:59.603625 140518658361152 checkpoint_manager.py:1452] Waiting for previous save to complete took 27.229016 seconds. If this number is high, consider checkpointing less frequently. I0423 13:48:59.605186 140518658361152 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 9 I0423 13:48:59.607284 140518658361152 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_true/checkpoints/9. I0423 13:49:00.113293 140518658361152 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0423 13:49:00.113384 140518658361152 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 13:49:00.147084 140518658361152 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.034738s I0423 13:49:00.147258 140518658361152 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 40.230 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.03834390640258789 s) (per-host) I0423 13:49:00.147314 140518658361152 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.038407s (batch_requests_ready=0.001662s, total_serialization_initiated=0.036677s, others=0.000069s) I0423 13:49:00.147409 140518658361152 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.042533s (all_items=0.000010s, per_item={'items': '0.00001025'}, temp_paths=0.042522) I0423 13:49:00.148108 140518658361152 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.54 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_true/checkpoints/9. I0423 13:49:00.148411 140365352916736 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 14:09:00.148386 I0423 13:49:00.150320 140518658361152 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0423 13:49:00.150587 140390048978688 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0423 13:49:00.150744 140518658361152 standard_logger.py:34] {'step': 9, '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_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776952112.374584, 'wait_for_prev_duration_secs': 27.229016065597534, 'time_between_consecutive_saves_sec': 23.413816213607788, 'checkpointer_blocking_start_time': 1776952139.6052268, 'checkpointer_blocking_duration_secs': 0.5432839393615723, 'get_old_steps_start_time': 1776952140.1485271, 'get_old_steps_duration_secs': 2.7418136596679688e-05, 'checkpoint_manager_blocking_start_time': 1776952112.3728464, 'checkpoint_manager_blocking_duration_secs': 27.777868270874023} I0423 13:49:00.150853 140518658361152 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0423 13:49:00.150895 140518658361152 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 13:49:05.293983 140392171284224 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_true/checkpoints/9/items/array_metadatas/process_6 I0423 13:49:41.231837 140365352916736 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 38.412 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.12288308143616 s) (per-host) I0423 13:49:41.231966 140365352916736 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.083479s. I0423 13:49:50.319496 140365352916736 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 50.170995s. I0423 13:49:50.319796 140390048978688 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 13:49:50.319919 140390048978688 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0423 13:49:50.319962 140390048978688 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0423 13:49:50.321275 140390048978688 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0423 13:49:50.321436 140518658361152 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9. I0423 13:49:50.321584 140518658361152 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 13:49:50.322560 140518658361152 metric_logger.py:196] completed step: 9, seconds: 0.149, TFLOP/s/device: 91.388, Tokens/s/device: 13774.920, total_weights: 65536, loss: 7.181, lm_loss: 7.181, perplexity: 1314.495 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Thu Apr 23 13:50:00 UTC 2026 EXIT_CODE=0