XPK Start: Tue Apr 21 15:26:38 UTC 2026 PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used. `rope_parameters`'s factor field must be a float >= 1, got 40 `rope_parameters`'s beta_fast field must be a float, got 32 `rope_parameters`'s beta_slow field must be a float, got 1 DeepseekV32Config got `key=rope_scaling` in kwargs but hasn't set it as attribute. For RoPE standardization you need to set `self.rope_parameters` in model's config. 2026-04-21 15:27:02.940184: 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) I0421 15:27:03.149770 135758943283008 max_utils.py:273] Attempting to initialize the jax distributed system... I0421 15:27:12.191168 135758943283008 distributed.py:149] Starting JAX distributed service on [::]:8482 I0421 15:27:12.193612 135758943283008 distributed.py:172] Connecting to JAX distributed service on mt-13-scan-layers-true-x86qa-slice-job-0-0.mt-13-scan-layers-true-x86qa:8482 I0421 15:27:13.711461 135758943283008 max_utils.py:284] Jax distributed system initialized! I0421 15:27:19.764876 135758943283008 max_utils.py:800] System Information: Jax Version: 0.9.2 I0421 15:27:19.764981 135758943283008 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0421 15:27:19.765027 135758943283008 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 I0421 15:27:19.765065 135758943283008 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0421 15:27:20.466927 135758943283008 maxtext_utils.py:1565] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0421 15:27:20.467207 135758943283008 checkpointing.py:677] Setting up checkpoint logger... I0421 15:27:20.467261 135758943283008 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True I0421 15:27:20.467308 135758943283008 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0421 15:27:20.467642 135758943283008 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 0x7b781fe4c080>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0421 15:27:23.328540 135758943283008 checkpointing.py:265] Enabling policy for fixed interval checkpointing. I0421 15:27:23.328802 135758943283008 checkpoint_manager.py:708] [process=7][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7b62d0462ba0>}, handler_registry=None I0421 15:27:23.329037 135758943283008 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7b62d0462ba0>` 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`. I0421 15:27:23.329087 135758943283008 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7b63c419e960>` 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`. I0421 15:27:23.329123 135758943283008 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 0x7b62d0462ba0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7b62d0462ba0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7b63c419e960>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7b63c419e960>}). I0421 15:27:23.329437 135758943283008 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0421 15:27:23.329510 135758943283008 async_checkpointer.py:192] [process=7][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7b638c6c9800> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0421 15:27:24.496179 135758943283008 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_13_scan_layers_true/checkpoints I0421 15:27:24.903729 135758943283008 checkpoint_manager.py:929] [process=7][thread=MainThread] CheckpointManager created, primary_host=0, CheckpointManagerOptions=CheckpointManagerOptions(save_interval_steps=1, max_to_keep=None, keep_time_interval=None, keep_period=None, should_keep_fn=None, best_fn=None, best_mode='max', keep_checkpoints_without_metrics=True, step_prefix=None, step_format_fixed_length=None, step_name_format=None, create=True, cleanup_tmp_directories=False, save_on_steps=frozenset(), single_host_load_and_broadcast=False, todelete_subdir=None, todelete_full_path=None, enable_background_delete=False, read_only=False, enable_async_checkpointing=True, async_options=None, multiprocessing_options=MultiprocessingOptions(primary_host=0, active_processes=None, barrier_sync_key_prefix=None), should_save_fn=None, file_options=FileOptions(path_permission_mode=None), save_root_metadata=True, temporary_path_class=None, save_decision_policy=FixedIntervalPolicy(interval=10), preservation_policy=LatestN(n=None), prevent_write_metrics=False, enable_should_save_is_saving_in_progress_check=True, enable_per_process_directory_creation=False, lightweight_initialize=False), root_directory=gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_13_scan_layers_true/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7b63c419f890> I0421 15:27:24.903950 135758943283008 checkpointing.py:301] Checkpoint manager created! I0421 15:27:25.851400 135758943283008 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0421 15:27:25.851520 135758943283008 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0421 15:27:26.234075 135758943283008 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0421 15:27:26.234168 135758943283008 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0421 15:27:26.250869 135758943283008 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0421 15:27:26.250928 135758943283008 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0421 15:27:26.274989 135758943283008 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0421 15:27:26.275055 135758943283008 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0421 15:27:26.291833 135758943283008 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0421 15:27:26.291895 135758943283008 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0421 15:27:26.308571 135758943283008 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0421 15:27:26.308632 135758943283008 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0421 15:27:26.334036 135758943283008 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0421 15:27:26.334107 135758943283008 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0421 15:27:26.355270 135758943283008 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0421 15:27:26.355339 135758943283008 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0421 15:27:26.567449 135758943283008 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint I0421 15:27:26.567556 135758943283008 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0421 15:27:27.996329 135758943283008 maxtext_utils.py:1668] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0421 15:27:27.996455 135758943283008 maxtext_utils.py:1668] params/params/decoder/layers/mlp/wi_0/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0421 15:27:27.996508 135758943283008 maxtext_utils.py:1668] params/params/decoder/layers/mlp/wi_1/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0421 15:27:27.996567 135758943283008 maxtext_utils.py:1668] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: P('mlp', 'layers', 'embed') Physical: (None, None, 'fsdp') I0421 15:27:27.996621 135758943283008 maxtext_utils.py:1668] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0421 15:27:27.996659 135758943283008 maxtext_utils.py:1668] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0421 15:27:27.996709 135758943283008 maxtext_utils.py:1668] 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) I0421 15:27:27.996773 135758943283008 maxtext_utils.py:1668] 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') I0421 15:27:27.996815 135758943283008 maxtext_utils.py:1668] 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) I0421 15:27:27.996850 135758943283008 maxtext_utils.py:1668] 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) I0421 15:27:27.996897 135758943283008 maxtext_utils.py:1668] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0421 15:27:27.996942 135758943283008 maxtext_utils.py:1668] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0421 15:27:28.497891 135758943283008 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0421 15:27:28.497988 135758943283008 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0421 15:27:28.513706 135758943283008 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0421 15:27:28.513780 135758943283008 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0421 15:27:39.421025 135758943283008 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. I0421 15:27:39.421860 135758943283008 metric_logger.py:301] number parameters: 1.104 billion I0421 15:27:50.951826 135758943283008 checkpointing.py:772] Waiting for step 0 to finish before checkpoint... I0421 15:27:51.224989 135758943283008 checkpointing.py:776] Waited 0.27314209938049316 seconds for step 0 to finish before starting checkpointing. I0421 15:27:51.227468 135758943283008 checkpoint_manager.py:2009] [process=7][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0421 15:27:51.229464 135758943283008 checkpoint_manager.py:1512] [process=7] Saving checkpoint at step 0 I0421 15:27:51.230826 135758943283008 event_tracking.py:70] [process=7] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_13_scan_layers_true/checkpoints/0. I0421 15:27:51.570775 135758943283008 signaling_client.py:364] Using JaxDistributedSignalingClient I0421 15:27:51.571671 135758943283008 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0421 15:27:51.571727 135758943283008 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 I0421 15:27:51.843407 135758943283008 base_pytree_checkpoint_handler.py:154] [process=7][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.272717s I0421 15:27:51.843578 135758943283008 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/blocking_gbytes_per_sec: 5.544 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2782444953918457 s) (per-host) I0421 15:27:51.843631 135758943283008 base_pytree_checkpoint_handler.py:768] [process=7][thread=MainThread] Initiated Pytree async_save. Time taken: 0.278306s (batch_requests_ready=0.002216s, total_serialization_initiated=0.276021s, others=0.000070s) I0421 15:27:51.843726 135758943283008 composite_checkpoint_handler.py:715] [process=7][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.282770s (all_items=0.000018s, per_item={'items': '0.00001836'}, temp_paths=0.282752) I0421 15:27:51.844460 135758943283008 event_tracking.py:125] [process=7] [async] Finished blocking save in 0.61 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_13_scan_layers_true/checkpoints/0. I0421 15:27:51.844784 135628515399424 async_checkpointer.py:76] [process=7][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-21 15:47:51.844742 I0421 15:27:51.863022 135758943283008 checkpoint_manager.py:1560] [process=7][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0421 15:27:51.863297 135630149924608 async_checkpointer.py:280] [process=7][thread=save_finalize] Waiting for background save thread=async_save. I0421 15:27:51.863454 135758943283008 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_13_scan_layers_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776785271.227449, 'wait_for_prev_duration_secs': 6.151199340820312e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776785271.2295043, 'checkpointer_blocking_duration_secs': 0.6153879165649414, 'get_old_steps_start_time': 1776785271.8449147, 'get_old_steps_duration_secs': 2.6226043701171875e-05, 'checkpoint_manager_blocking_start_time': 1776785271.2255006, 'checkpoint_manager_blocking_duration_secs': 0.6379148960113525} I0421 15:27:51.863557 135758943283008 checkpointing.py:408] Started an asynchronous checkpoint save for step 0 I0421 15:27:51.863606 135758943283008 max_utils.py:750] Memstats: After params initialized: I0421 15:27:51.863656 135758943283008 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_26(process=7,(2,6,0,0)) I0421 15:27:51.863688 135758943283008 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_27(process=7,(3,6,0,0)) I0421 15:27:51.863715 135758943283008 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_30(process=7,(2,7,0,0)) I0421 15:27:51.863751 135758943283008 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_31(process=7,(3,7,0,0)) I0421 15:27:52.171099 135758943283008 metric_logger.py:196] completed step: 0, seconds: 11.530, TFLOP/s/device: 1.178, Tokens/s/device: 177.626, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875 I0421 15:27:52.353279 135758943283008 metric_logger.py:196] completed step: 1, seconds: 1.218, TFLOP/s/device: 11.158, Tokens/s/device: 1681.794, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875 I0421 15:27:52.741187 135758943283008 metric_logger.py:196] completed step: 2, seconds: 0.034, TFLOP/s/device: 405.538, Tokens/s/device: 61127.030, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28637.129 I0421 15:27:52.888650 135758943283008 metric_logger.py:196] completed step: 3, seconds: 0.389, TFLOP/s/device: 34.897, Tokens/s/device: 5260.022, total_weights: 65536, loss: 9.734, lm_loss: 9.734, perplexity: 16889.203 I0421 15:27:53.183472 135758943283008 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.602, Tokens/s/device: 13354.983, total_weights: 65536, loss: 9.277, lm_loss: 9.277, perplexity: 10694.614 I0421 15:27:53.189362 135758943283008 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.194, Tokens/s/device: 13896.428, total_weights: 65536, loss: 8.892, lm_loss: 8.892, perplexity: 7270.717 I0421 15:27:54.747636 2848 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0421 15:27:57.310188 135628523792128 array_metadata_store.py:203] [process=7][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_13_scan_layers_true/checkpoints/0/items/array_metadatas/process_7 I0421 15:28:14.906347 135758943283008 metric_logger.py:196] completed step: 6, seconds: 0.295, TFLOP/s/device: 46.030, Tokens/s/device: 6938.210, total_weights: 65536, loss: 8.592, lm_loss: 8.592, perplexity: 5390.759 I0421 15:28:15.053704 135758943283008 metric_logger.py:196] completed step: 7, seconds: 21.570, TFLOP/s/device: 0.630, Tokens/s/device: 94.945, total_weights: 65536, loss: 8.384, lm_loss: 8.384, perplexity: 4376.905 I0421 15:28:15.201195 135758943283008 metric_logger.py:196] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.316, Tokens/s/device: 13462.613, total_weights: 65536, loss: 8.255, lm_loss: 8.255, perplexity: 3846.406 I0421 15:28:15.347840 135758943283008 checkpointing.py:772] Waiting for step 9 to finish before checkpoint... I0421 15:28:15.348481 135758943283008 checkpointing.py:776] Waited 0.0006616115570068359 seconds for step 9 to finish before starting checkpointing. I0421 15:28:15.350642 135758943283008 checkpoint_manager.py:2020] [process=7][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0421 15:28:28.408104 135628515399424 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/gbytes_per_sec: 42.874 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 36.84273672103882 s) (per-host) I0421 15:28:28.408213 135628515399424 async_checkpointer.py:90] [process=7][thread=async_save] 3 Handler Commit operations completed. Time taken: 36.562875s. I0421 15:28:37.728153 135628515399424 async_checkpointer.py:160] [process=7][thread=async_save] Background save thread done. Time taken: 45.882800s. I0421 15:28:37.728439 135630149924608 async_checkpointer.py:288] [process=7][thread=save_finalize] Done with waiting for background save thread=async_save. I0421 15:28:37.728549 135630149924608 async_checkpointer.py:298] [process=7][thread=save_finalize] No errors found in background save thread=async_save. I0421 15:28:37.728599 135630149924608 checkpoint_manager.py:2137] [process=7][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0421 15:28:37.731464 135630149924608 checkpoint_manager.py:2146] [process=7][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0421 15:28:37.731647 135758943283008 checkpoint_manager.py:2032] [process=7][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0. W0421 15:28:37.731797 135758943283008 checkpoint_manager.py:1452] Waiting for previous save to complete took 22.381156 seconds. If this number is high, consider checkpointing less frequently. I0421 15:28:37.733595 135758943283008 checkpoint_manager.py:1512] [process=7] Saving checkpoint at step 9 I0421 15:28:37.735606 135758943283008 event_tracking.py:70] [process=7] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_13_scan_layers_true/checkpoints/9. I0421 15:28:38.442497 135758943283008 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0421 15:28:38.442597 135758943283008 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 I0421 15:28:38.482975 135758943283008 base_pytree_checkpoint_handler.py:154] [process=7][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.041642s I0421 15:28:38.483134 135758943283008 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/blocking_gbytes_per_sec: 34.210 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.045091867446899414 s) (per-host) I0421 15:28:38.483185 135758943283008 base_pytree_checkpoint_handler.py:768] [process=7][thread=MainThread] Initiated Pytree async_save. Time taken: 0.045152s (batch_requests_ready=0.001821s, total_serialization_initiated=0.043264s, others=0.000067s) I0421 15:28:38.483293 135758943283008 composite_checkpoint_handler.py:715] [process=7][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.049461s (all_items=0.000015s, per_item={'items': '0.00001454'}, temp_paths=0.049446) I0421 15:28:38.484033 135758943283008 event_tracking.py:125] [process=7] [async] Finished blocking save in 0.75 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_13_scan_layers_true/checkpoints/9. I0421 15:28:38.484335 135630149924608 async_checkpointer.py:76] [process=7][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-21 15:48:38.484297 I0421 15:28:38.486391 135758943283008 checkpoint_manager.py:1560] [process=7][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0421 15:28:38.486692 135630135592704 async_checkpointer.py:280] [process=7][thread=save_finalize] Waiting for background save thread=async_save. I0421 15:28:38.486874 135758943283008 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_13_scan_layers_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776785295.3506112, 'wait_for_prev_duration_secs': 22.38115620613098, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776785317.733636, 'checkpointer_blocking_duration_secs': 0.7508454322814941, 'get_old_steps_start_time': 1776785318.4845042, 'get_old_steps_duration_secs': 3.0517578125e-05, 'checkpoint_manager_blocking_start_time': 1776785295.348704, 'checkpoint_manager_blocking_duration_secs': 23.13813281059265} I0421 15:28:38.486990 135758943283008 checkpointing.py:408] Started an asynchronous checkpoint save for step 9 I0421 15:28:38.487035 135758943283008 checkpoint_manager.py:2020] [process=7][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0421 15:28:44.188727 135605845485312 array_metadata_store.py:203] [process=7][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_13_scan_layers_true/checkpoints/9/items/array_metadatas/process_7 I0421 15:29:25.216715 135630149924608 base_pytree_checkpoint_handler.py:130] [process=7] /jax/orbax/write/gbytes_per_sec: 33.767 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 46.77863430976868 s) (per-host) I0421 15:29:25.216858 135630149924608 async_checkpointer.py:90] [process=7][thread=async_save] 3 Handler Commit operations completed. Time taken: 46.732404s. I0421 15:29:31.213477 135630149924608 async_checkpointer.py:160] [process=7][thread=async_save] Background save thread done. Time taken: 52.729008s. I0421 15:29:31.213760 135630135592704 async_checkpointer.py:288] [process=7][thread=save_finalize] Done with waiting for background save thread=async_save. I0421 15:29:31.213886 135630135592704 async_checkpointer.py:298] [process=7][thread=save_finalize] No errors found in background save thread=async_save. I0421 15:29:31.213934 135630135592704 checkpoint_manager.py:2137] [process=7][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0421 15:29:31.216469 135630135592704 checkpoint_manager.py:2146] [process=7][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0421 15:29:31.216626 135758943283008 checkpoint_manager.py:2032] [process=7][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9. I0421 15:29:31.216780 135758943283008 checkpoint_manager.py:2009] [process=7][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0421 15:29:31.217702 135758943283008 metric_logger.py:196] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.189, Tokens/s/device: 13895.674, total_weights: 65536, loss: 8.179, lm_loss: 8.179, perplexity: 3564.635 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Tue Apr 21 15:29:43 UTC 2026 EXIT_CODE=0