XPK Start: Fri Apr 24 13:13:47 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. 2026-04-24 13:14:11.613794: 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) I0424 13:14:12.189528 135444366239552 max_utils.py:273] Attempting to initialize the jax distributed system... I0424 13:14:21.230675 135444366239552 distributed.py:149] Starting JAX distributed service on [::]:8482 I0424 13:14:21.233128 135444366239552 distributed.py:172] Connecting to JAX distributed service on mt-16-zarr3-true-sv-mj2lf-slice-job-0-0.mt-16-zarr3-true-sv-mj2lf:8482 I0424 13:14:22.259091 135444366239552 max_utils.py:284] Jax distributed system initialized! I0424 13:14:27.209175 135444366239552 max_utils.py:800] System Information: Jax Version: 0.9.2 I0424 13:14:27.209285 135444366239552 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0424 13:14:27.209328 135444366239552 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 I0424 13:14:27.209366 135444366239552 train_utils.py:391] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0424 13:14:27.916567 135444366239552 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0424 13:14:27.917172 135444366239552 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0424 13:14:27.917363 135444366239552 checkpointing.py:688] Setting up checkpoint logger... I0424 13:14:27.917415 135444366239552 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0424 13:14:27.917459 135444366239552 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0424 13:14:27.917793 135444366239552 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 0x7b2ee1948a10>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0424 13:14:30.817314 135444366239552 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0424 13:14:30.817552 135444366239552 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 0x7b1b4063f800>}, handler_registry=None I0424 13:14:30.817796 135444366239552 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7b1b4063f800>` 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`. I0424 13:14:30.817846 135444366239552 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7b1b4044c800>` 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`. I0424 13:14:30.817882 135444366239552 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 0x7b1b4063f800>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7b1b4063f800>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7b1b4044c800>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7b1b4044c800>}). I0424 13:14:30.818214 135444366239552 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0424 13:14:30.818290 135444366239552 async_checkpointer.py:192] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7b1b385b9940> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0424 13:14:31.564633 135444366239552 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_16_zarr3_true/checkpoints I0424 13:14:31.571481 135444366239552 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_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_16_zarr3_true/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7b1b40449a90> I0424 13:14:31.571597 135444366239552 checkpointing.py:302] Checkpoint manager created! I0424 13:14:32.509484 135444366239552 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0424 13:14:32.509590 135444366239552 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0424 13:14:32.888522 135444366239552 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn'). I0424 13:14:32.888614 135444366239552 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0424 13:14:32.905217 135444366239552 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn'). I0424 13:14:32.905282 135444366239552 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0424 13:14:32.929044 135444366239552 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim'). I0424 13:14:32.929130 135444366239552 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 13:14:32.945676 135444366239552 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim'). I0424 13:14:32.945737 135444366239552 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 13:14:32.962389 135444366239552 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim'). I0424 13:14:32.962448 135444366239552 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 13:14:32.987176 135444366239552 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch_attn', 'activation_length_attn', 'activation_heads', 'activation_kv'). I0424 13:14:32.987248 135444366239552 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 13:14:33.007978 135444366239552 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0424 13:14:33.008044 135444366239552 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0424 13:14:33.224223 135444366239552 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0424 13:14:33.224335 135444366239552 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0424 13:14:34.660684 135444366239552 maxtext_utils.py:1880] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0424 13:14:34.660814 135444366239552 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) I0424 13:14:34.660871 135444366239552 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) I0424 13:14:34.660931 135444366239552 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') I0424 13:14:34.660984 135444366239552 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) I0424 13:14:34.661026 135444366239552 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) I0424 13:14:34.661079 135444366239552 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) I0424 13:14:34.661166 135444366239552 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') I0424 13:14:34.661216 135444366239552 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) I0424 13:14:34.661253 135444366239552 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) I0424 13:14:34.661301 135444366239552 maxtext_utils.py:1880] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0424 13:14:34.661352 135444366239552 maxtext_utils.py:1880] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0424 13:14:35.157723 135444366239552 train.py:157] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0424 13:14:35.157819 135444366239552 train.py:157] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0424 13:14:35.173482 135444366239552 train.py:164] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0424 13:14:35.173544 135444366239552 train.py:164] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0424 13:14:46.173603 135444366239552 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. I0424 13:14:46.174443 135444366239552 metric_logger.py:301] number parameters: 1.104 billion I0424 13:14:57.600003 135444366239552 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0424 13:14:57.752918 135444366239552 checkpointing.py:798] Waited 0.15289998054504395 seconds for step 0 to finish before starting checkpointing. I0424 13:14:57.755447 135444366239552 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0424 13:14:57.757123 135444366239552 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 0 I0424 13:14:57.758703 135444366239552 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_16_zarr3_true/checkpoints/0. I0424 13:14:58.336176 135444366239552 signaling_client.py:364] Using JaxDistributedSignalingClient I0424 13:14:58.337279 135444366239552 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0424 13:14:58.337335 135444366239552 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 I0424 13:14:58.613226 135444366239552 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.277136s I0424 13:14:58.613400 135444366239552 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.456 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2827157974243164 s) (per-host) I0424 13:14:58.613452 135444366239552 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.282780s (batch_requests_ready=0.002344s, total_serialization_initiated=0.280364s, others=0.000072s) I0424 13:14:58.613548 135444366239552 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.286836s (all_items=0.000018s, per_item={'items': '0.00001836'}, temp_paths=0.286818) I0424 13:14:58.614373 135444366239552 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.86 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_16_zarr3_true/checkpoints/0. I0424 13:14:58.614701 135318581802752 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-24 13:34:58.614663 I0424 13:14:59.044935 135444366239552 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0424 13:14:59.045344 135317991642880 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0424 13:14:59.045513 135444366239552 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_16_zarr3_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777036497.7554283, 'wait_for_prev_duration_secs': 6.413459777832031e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777036497.757161, 'checkpointer_blocking_duration_secs': 0.8576915264129639, 'get_old_steps_start_time': 1777036498.6148777, 'get_old_steps_duration_secs': 3.218650817871094e-05, 'checkpoint_manager_blocking_start_time': 1777036497.7534637, 'checkpoint_manager_blocking_duration_secs': 1.292006254196167} I0424 13:14:59.045620 135444366239552 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0424 13:14:59.045674 135444366239552 max_utils.py:750] Memstats: After params initialized: I0424 13:14:59.045733 135444366239552 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0)) I0424 13:14:59.045767 135444366239552 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0)) I0424 13:14:59.045797 135444366239552 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0)) I0424 13:14:59.045824 135444366239552 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0)) I0424 13:14:59.359527 135444366239552 metric_logger.py:196] completed step: 0, seconds: 11.425, TFLOP/s/device: 1.189, Tokens/s/device: 179.249, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875 I0424 13:14:59.541931 135444366239552 metric_logger.py:196] completed step: 1, seconds: 1.758, TFLOP/s/device: 7.729, Tokens/s/device: 1164.967, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875 I0424 13:14:59.952481 135444366239552 metric_logger.py:196] completed step: 2, seconds: 0.035, TFLOP/s/device: 386.833, Tokens/s/device: 58307.710, total_weights: 65536, loss: 10.560, lm_loss: 10.560, perplexity: 38547.719 I0424 13:15:00.099824 135444366239552 metric_logger.py:196] completed step: 3, seconds: 0.411, TFLOP/s/device: 33.081, Tokens/s/device: 4986.365, total_weights: 65536, loss: 9.980, lm_loss: 9.980, perplexity: 21590.506 I0424 13:15:00.104270 135444366239552 checkpointing.py:794] Waiting for step 5 to finish before checkpoint... I0424 13:15:00.393862 135444366239552 checkpointing.py:798] Waited 0.28956031799316406 seconds for step 5 to finish before starting checkpointing. I0424 13:15:00.396762 135444366239552 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0424 13:15:02.227346 2740 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0424 13:15:04.272768 135318000035584 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_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_16_zarr3_true/checkpoints/0/items/array_metadatas/process_6 I0424 13:15:36.088763 135318581802752 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 41.835 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 37.75804114341736 s) (per-host) I0424 13:15:36.088889 135318581802752 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 37.474075s. I0424 13:15:44.595315 135318581802752 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 45.980485s. I0424 13:15:44.595603 135317991642880 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0424 13:15:44.595722 135317991642880 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0424 13:15:44.595774 135317991642880 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0424 13:15:44.597209 135317991642880 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0424 13:15:44.597389 135444366239552 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. W0424 13:15:44.597527 135444366239552 checkpoint_manager.py:1452] Waiting for previous save to complete took 44.200759 seconds. If this number is high, consider checkpointing less frequently. I0424 13:15:44.599553 135444366239552 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 5 I0424 13:15:44.602080 135444366239552 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_16_zarr3_true/checkpoints/5. I0424 13:15:44.891632 135444366239552 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0424 13:15:44.891723 135444366239552 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 I0424 13:15:44.931690 135444366239552 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.041127s I0424 13:15:44.931853 135444366239552 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 34.542 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04465842247009277 s) (per-host) I0424 13:15:44.931904 135444366239552 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.044719s (batch_requests_ready=0.001867s, total_serialization_initiated=0.042785s, others=0.000067s) I0424 13:15:44.931990 135444366239552 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.049622s (all_items=0.000031s, per_item={'items': '0.00003099'}, temp_paths=0.049591) I0424 13:15:44.932728 135444366239552 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_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_16_zarr3_true/checkpoints/5. I0424 13:15:44.933084 135317991642880 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-24 13:35:44.933047 I0424 13:15:44.936672 135444366239552 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=5] Starting CheckpointManager Save Finalize thread=save_finalize I0424 13:15:44.936925 135318000035584 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0424 13:15:44.937087 135444366239552 standard_logger.py:34] {'step': 5, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_16_zarr3_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777036500.3967311, 'wait_for_prev_duration_secs': 44.20075869560242, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777036544.5995924, 'checkpointer_blocking_duration_secs': 0.3336527347564697, 'get_old_steps_start_time': 1777036544.933269, 'get_old_steps_duration_secs': 3.218650817871094e-05, 'checkpoint_manager_blocking_start_time': 1777036500.3945084, 'checkpoint_manager_blocking_duration_secs': 44.54254102706909} I0424 13:15:44.937210 135444366239552 checkpointing.py:409] Started an asynchronous checkpoint save for step 5 I0424 13:15:44.938017 135444366239552 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.797, Tokens/s/device: 13384.396, total_weights: 65536, loss: 9.460, lm_loss: 9.460, perplexity: 12840.355 I0424 13:15:44.944090 135444366239552 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.232, Tokens/s/device: 13902.277, total_weights: 65536, loss: 8.959, lm_loss: 8.959, perplexity: 7776.467 I0424 13:15:50.068932 135291176208128 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_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_16_zarr3_true/checkpoints/5/items/array_metadatas/process_6 I0424 13:16:07.389900 135444366239552 metric_logger.py:196] completed step: 6, seconds: 44.838, TFLOP/s/device: 0.303, Tokens/s/device: 45.675, total_weights: 65536, loss: 8.469, lm_loss: 8.469, perplexity: 4762.740 I0424 13:16:07.537286 135444366239552 metric_logger.py:196] completed step: 7, seconds: 22.300, TFLOP/s/device: 0.609, Tokens/s/device: 91.838, total_weights: 65536, loss: 8.003, lm_loss: 8.003, perplexity: 2989.151 I0424 13:16:07.684619 135444366239552 metric_logger.py:196] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.511, Tokens/s/device: 13492.058, total_weights: 65536, loss: 7.572, lm_loss: 7.572, perplexity: 1943.098 I0424 13:16:07.831218 135444366239552 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0424 13:16:07.831896 135444366239552 checkpointing.py:798] Waited 0.0006985664367675781 seconds for step 9 to finish before starting checkpointing. I0424 13:16:07.833902 135444366239552 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=5][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0424 13:16:27.414236 135317991642880 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 37.143 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.527021169662476 s) (per-host) I0424 13:16:27.414351 135317991642880 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.481135s. I0424 13:16:35.096208 135317991642880 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 50.162976s. I0424 13:16:35.096502 135318000035584 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0424 13:16:35.096624 135318000035584 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0424 13:16:35.096673 135318000035584 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=5] CheckpointManager Save Finalize is syncing with other hosts... I0424 13:16:35.098261 135318000035584 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=5] CheckpointManager Save Finalize is done on all hosts. I0424 13:16:35.098447 135444366239552 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. W0424 13:16:35.098587 135444366239552 checkpoint_manager.py:1452] Waiting for previous save to complete took 27.264691 seconds. If this number is high, consider checkpointing less frequently. I0424 13:16:35.099982 135444366239552 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 9 I0424 13:16:35.102043 135444366239552 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_16_zarr3_true/checkpoints/9. I0424 13:16:35.406988 135444366239552 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0424 13:16:35.407076 135444366239552 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 I0424 13:16:35.446409 135444366239552 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.040256s I0424 13:16:35.446588 135444366239552 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 35.218 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04380083084106445 s) (per-host) I0424 13:16:35.446642 135444366239552 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.043866s (batch_requests_ready=0.001751s, total_serialization_initiated=0.042045s, others=0.000071s) I0424 13:16:35.446735 135444366239552 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.047863s (all_items=0.000011s, per_item={'items': '0.00001121'}, temp_paths=0.047852) I0424 13:16:35.447399 135444366239552 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.35 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_16_zarr3_true/checkpoints/9. I0424 13:16:35.447696 135315325458176 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-24 13:36:35.447663 I0424 13:16:35.449679 135444366239552 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0424 13:16:35.449943 135318000035584 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0424 13:16:35.450111 135444366239552 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_16_zarr3_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777036567.833871, 'wait_for_prev_duration_secs': 27.26469087600708, 'time_between_consecutive_saves_sec': 23.236621618270874, 'checkpointer_blocking_start_time': 1777036595.100025, 'checkpointer_blocking_duration_secs': 0.34781360626220703, 'get_old_steps_start_time': 1777036595.4478557, 'get_old_steps_duration_secs': 2.47955322265625e-05, 'checkpoint_manager_blocking_start_time': 1777036567.8321462, 'checkpoint_manager_blocking_duration_secs': 27.617918491363525} I0424 13:16:35.450223 135444366239552 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0424 13:16:35.450265 135444366239552 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0424 13:16:40.917250 135291176208128 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_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_16_zarr3_true/checkpoints/9/items/array_metadatas/process_6 I0424 13:17:18.360750 135315325458176 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 36.771 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.95792508125305 s) (per-host) I0424 13:17:18.360877 135315325458176 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.913073s. I0424 13:17:25.134615 135315325458176 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 49.686794s. I0424 13:17:25.134887 135318000035584 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0424 13:17:25.135005 135318000035584 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0424 13:17:25.135046 135318000035584 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0424 13:17:25.136401 135318000035584 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0424 13:17:25.136606 135444366239552 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. I0424 13:17:25.136754 135444366239552 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0424 13:17:25.137813 135444366239552 metric_logger.py:196] completed step: 9, seconds: 0.148, TFLOP/s/device: 92.028, Tokens/s/device: 13871.486, 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: Fri Apr 24 13:17:37 UTC 2026 EXIT_CODE=0