XPK Start: Wed Apr 22 22:20:08 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. 2026-04-22 22:20:33.577774: 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) I0422 22:20:33.790050 133387672659776 max_utils.py:273] Attempting to initialize the jax distributed system... I0422 22:20:42.832805 133387672659776 distributed.py:149] Starting JAX distributed service on [::]:8482 I0422 22:20:42.835165 133387672659776 distributed.py:172] Connecting to JAX distributed service on mt-14-async-ckpt-false--dd7i1-slice-job-0-0.mt-14-async-ckpt-false--dd7i1:8482 I0422 22:20:43.772544 133387672659776 max_utils.py:284] Jax distributed system initialized! I0422 22:20:49.837603 133387672659776 max_utils.py:800] System Information: Jax Version: 0.9.2 I0422 22:20:49.837707 133387672659776 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0422 22:20:49.837747 133387672659776 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 I0422 22:20:49.837783 133387672659776 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0422 22:20:50.539921 133387672659776 maxtext_utils.py:1565] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0422 22:20:50.540218 133387672659776 checkpointing.py:677] Setting up checkpoint logger... I0422 22:20:50.540278 133387672659776 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True I0422 22:20:50.540325 133387672659776 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0422 22:20:50.540665 133387672659776 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 0x795005144590>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0422 22:20:52.252265 133387672659776 checkpointing.py:265] Enabling policy for fixed interval checkpointing. I0422 22:20:52.252514 133387672659776 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 0x793b347db650>}, handler_registry=None I0422 22:20:52.252756 133387672659776 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x793b347db650>` 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`. I0422 22:20:52.252804 133387672659776 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x793b347df740>` 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`. I0422 22:20:52.252840 133387672659776 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 0x793b347db650>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x793b347db650>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x793b347df740>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x793b347df740>}). I0422 22:20:52.253174 133387672659776 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0422 22:20:55.049601 133266988328704 checkpoint.py:228] Read Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776896210356882087, 'commit_timestamp_nsecs': 1776896259965456585, 'custom_metadata': {}} from gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_14_async_ckpt_false/checkpoints/5/_CHECKPOINT_METADATA I0422 22:20:55.299819 133266988328704 checkpoint_manager.py:1871] Missing metrics for step 5 I0422 22:20:56.563173 133387672659776 checkpoint_manager.py:1812] Found 3 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_14_async_ckpt_false/checkpoints I0422 22:20:56.754295 133387672659776 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=False, 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_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_14_async_ckpt_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x793b347dc6e0> I0422 22:20:56.754478 133387672659776 checkpointing.py:301] Checkpoint manager created! I0422 22:20:57.696797 133387672659776 nnx_wrappers.py:453] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0422 22:20:57.696917 133387672659776 nnx_wrappers.py:453] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0422 22:20:58.077729 133387672659776 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0422 22:20:58.077826 133387672659776 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0422 22:20:58.094211 133387672659776 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0422 22:20:58.094270 133387672659776 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0422 22:20:58.117768 133387672659776 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0422 22:20:58.117837 133387672659776 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0422 22:20:58.134259 133387672659776 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0422 22:20:58.134325 133387672659776 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0422 22:20:58.150631 133387672659776 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0422 22:20:58.150695 133387672659776 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0422 22:20:58.175686 133387672659776 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0422 22:20:58.175758 133387672659776 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0422 22:20:58.197632 133387672659776 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0422 22:20:58.197705 133387672659776 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0422 22:20:58.409931 133387672659776 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint I0422 22:20:58.410043 133387672659776 checkpointing.py:581] restoring from this run's directory step 9 I0422 22:20:58.662181 133387672659776 event_tracking.py:70] [process=6] [sync] Started load checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_14_async_ckpt_false/checkpoints/9. I0422 22:20:58.908248 133387672659776 checkpointer.py:307] Restoring checkpoint from gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_14_async_ckpt_false/checkpoints/9. I0422 22:20:58.908693 133387672659776 event_tracking.py:125] [process=6] [sync] Finished blocking load in 0.25 seconds. Continuing load @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_14_async_ckpt_false/checkpoints/9. I0422 22:21:00.764066 1439 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0422 22:21:07.636622 133387672659776 jax_array_handlers.py:843] [process=6] /jax/orbax/read/worker/io/requested throughput: 229.743 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 6.878451585769653 s) (per-host) I0422 22:21:07.643723 133387672659776 base_pytree_checkpoint_handler.py:130] [process=6] /jax/checkpoint/read/gbytes_per_sec: 217.284 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 7.283534049987793 s) (per-host) I0422 22:21:08.901957 133387672659776 event_tracking.py:138] [process=6] [sync] Finished load in 10.24 seconds @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_14_async_ckpt_false/checkpoints/9 I0422 22:21:08.902139 133387672659776 standard_logger.py:34] {'step': 9, 'event_type': 'restore', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_14_async_ckpt_false/checkpoints', 'checkpointer_start_time': 1776896458.662081, 'checkpointer_duration_secs': 10.240007877349854, 'checkpoint_manager_start_time': 1776896458.4105272, 'checkpoint_manager_duration_secs': 10.491564512252808} fsdp: 32 I0422 22:21:09.322064 133387672659776 maxtext_utils.py:1668] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0422 22:21:09.322206 133387672659776 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) I0422 22:21:09.322261 133387672659776 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) I0422 22:21:09.322318 133387672659776 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') I0422 22:21:09.322370 133387672659776 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) I0422 22:21:09.322408 133387672659776 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) I0422 22:21:09.322461 133387672659776 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) I0422 22:21:09.322517 133387672659776 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') I0422 22:21:09.322556 133387672659776 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) I0422 22:21:09.322600 133387672659776 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) I0422 22:21:09.322647 133387672659776 maxtext_utils.py:1668] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0422 22:21:09.322693 133387672659776 maxtext_utils.py:1668] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0422 22:21:09.809878 133387672659776 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0422 22:21:09.809971 133387672659776 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0422 22:21:09.825442 133387672659776 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0422 22:21:09.825502 133387672659776 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0422 22:21:20.802868 133387672659776 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. I0422 22:21:20.803768 133387672659776 metric_logger.py:301] number parameters: 1.104 billion I0422 22:21:32.426199 133387672659776 checkpointing.py:772] Waiting for step 10 to finish before checkpoint... I0422 22:21:32.582443 133387672659776 checkpointing.py:776] Waited 0.15622377395629883 seconds for step 10 to finish before starting checkpointing. I0422 22:21:32.584801 133387672659776 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0422 22:21:32.586620 133387672659776 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 10 I0422 22:21:32.587997 133387672659776 event_tracking.py:70] [process=6] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_14_async_ckpt_false/checkpoints/10. I0422 22:21:36.437061 133387672659776 signaling_client.py:364] Using JaxDistributedSignalingClient I0422 22:21:36.438468 133387672659776 future.py:372] [process=6][thread=MainThread][operation_id=1] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture. I0422 22:21:37.797917 133387672659776 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0422 22:21:37.798012 133387672659776 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 I0422 22:21:38.080776 133387672659776 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.284008s I0422 22:21:38.080967 133387672659776 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.351 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2882821559906006 s) (per-host) I0422 22:21:38.081023 133387672659776 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.288349s (batch_requests_ready=0.002494s, total_serialization_initiated=0.285780s, others=0.000076s) I0422 22:21:38.081131 133387672659776 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.644158s (all_items=0.000045s, per_item={'items': '0.00004458'}, temp_paths=1.644114) I0422 22:21:38.081179 133387672659776 future.py:372] [process=6][thread=MainThread][operation_id=1] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture. I0422 22:21:38.081219 133387672659776 future.py:372] [process=6][thread=MainThread][operation_id=1] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture. I0422 22:21:40.665183 133266954757888 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_14_async_ckpt_false/checkpoints/10/items/array_metadatas/process_6 I0422 22:22:15.486505 133387672659776 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 41.906 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 37.69378733634949 s) (per-host) I0422 22:22:21.348771 133387672659776 event_tracking.py:125] [process=6] [sync] Finished blocking save in 48.76 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_14_async_ckpt_false/checkpoints/10. I0422 22:22:25.301026 133387672659776 event_tracking.py:138] [process=6] [sync] Finished save in 52.71 seconds @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_14_async_ckpt_false/checkpoints/10 I0422 22:22:25.303660 133387672659776 checkpoint_manager.py:2137] [process=6][thread=MainThread][step=10] CheckpointManager Save Finalize is syncing with other hosts... I0422 22:22:25.305160 133387672659776 checkpoint_manager.py:2146] [process=6][thread=MainThread][step=10] CheckpointManager Save Finalize is done on all hosts. I0422 22:22:25.305209 133387672659776 checkpoint_manager.py:1581] [process=6][thread=MainThread][step=10] Finished synchronous save. I0422 22:22:25.305263 133387672659776 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1776896492.5847826, 'wait_for_prev_duration_secs': 6.270408630371094e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776896492.5866601, 'checkpointer_blocking_duration_secs': 52.71451139450073, 'get_old_steps_start_time': 1776896545.301192, 'get_old_steps_duration_secs': 2.8133392333984375e-05, 'checkpoint_manager_blocking_start_time': 1776896492.582831, 'checkpoint_manager_blocking_duration_secs': 52.722405433654785} I0422 22:22:25.305354 133387672659776 checkpointing.py:410] Saved a checkpoint at step 10. I0422 22:22:25.305396 133387672659776 max_utils.py:750] Memstats: After params initialized: I0422 22:22:25.305441 133387672659776 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0)) I0422 22:22:25.305472 133387672659776 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0)) I0422 22:22:25.305496 133387672659776 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0)) I0422 22:22:25.305525 133387672659776 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0)) I0422 22:22:25.633052 133387672659776 metric_logger.py:196] completed step: 10, seconds: 11.622, TFLOP/s/device: 1.169, Tokens/s/device: 176.213, total_weights: 65536, loss: 6.833, lm_loss: 6.833, perplexity: 927.869 I0422 22:22:25.793457 133387672659776 metric_logger.py:196] completed step: 11, seconds: 53.189, TFLOP/s/device: 0.255, Tokens/s/device: 38.504, total_weights: 65536, loss: 6.527, lm_loss: 6.527, perplexity: 683.659 I0422 22:22:25.941228 133387672659776 metric_logger.py:196] completed step: 12, seconds: 0.029, TFLOP/s/device: 463.503, Tokens/s/device: 69864.229, total_weights: 65536, loss: 6.265, lm_loss: 6.265, perplexity: 526.068 I0422 22:22:26.088350 133387672659776 metric_logger.py:196] completed step: 13, seconds: 0.154, TFLOP/s/device: 88.476, Tokens/s/device: 13336.025, total_weights: 65536, loss: 6.045, lm_loss: 6.045, perplexity: 422.001 I0422 22:22:26.093401 133387672659776 checkpointing.py:772] Waiting for step 15 to finish before checkpoint... I0422 22:22:26.382585 133387672659776 checkpointing.py:776] Waited 0.2891502380371094 seconds for step 15 to finish before starting checkpointing. I0422 22:22:26.385531 133387672659776 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0422 22:22:26.387064 133387672659776 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 15 I0422 22:22:26.388995 133387672659776 event_tracking.py:70] [process=6] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_14_async_ckpt_false/checkpoints/15. I0422 22:22:30.128088 133387672659776 future.py:372] [process=6][thread=MainThread][operation_id=2] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture. I0422 22:22:32.809357 133387672659776 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0422 22:22:32.809455 133387672659776 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 I0422 22:22:32.853910 133387672659776 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.045729s I0422 22:22:32.854090 133387672659776 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 31.159 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.049506425857543945 s) (per-host) I0422 22:22:32.854156 133387672659776 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.049582s (batch_requests_ready=0.001894s, total_serialization_initiated=0.047607s, others=0.000081s) I0422 22:22:32.854254 133387672659776 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 2.727349s (all_items=0.000028s, per_item={'items': '0.00002766'}, temp_paths=2.727321) I0422 22:22:32.854296 133387672659776 future.py:372] [process=6][thread=MainThread][operation_id=2] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture. I0422 22:22:32.854333 133387672659776 future.py:372] [process=6][thread=MainThread][operation_id=2] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture. I0422 22:22:35.321908 133261024032512 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_14_async_ckpt_false/checkpoints/15/items/array_metadatas/process_6 I0422 22:23:10.967221 133387672659776 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 41.391 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 38.162595987319946 s) (per-host) I0422 22:23:18.689188 133387672659776 event_tracking.py:125] [process=6] [sync] Finished blocking save in 52.30 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_14_async_ckpt_false/checkpoints/15. I0422 22:23:22.563920 133387672659776 event_tracking.py:138] [process=6] [sync] Finished save in 56.18 seconds @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_14_async_ckpt_false/checkpoints/15 I0422 22:23:22.565875 133387672659776 checkpoint_manager.py:2137] [process=6][thread=MainThread][step=15] CheckpointManager Save Finalize is syncing with other hosts... I0422 22:23:22.567357 133387672659776 checkpoint_manager.py:2146] [process=6][thread=MainThread][step=15] CheckpointManager Save Finalize is done on all hosts. I0422 22:23:22.567408 133387672659776 checkpoint_manager.py:1581] [process=6][thread=MainThread][step=15] Finished synchronous save. I0422 22:23:22.567459 133387672659776 standard_logger.py:34] {'step': 15, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1776896546.3855083, 'wait_for_prev_duration_secs': 6.151199340820312e-05, 'time_between_consecutive_saves_sec': 1.0803096294403076, 'checkpointer_blocking_start_time': 1776896546.3871176, 'checkpointer_blocking_duration_secs': 56.17692041397095, 'get_old_steps_start_time': 1776896602.5640576, 'get_old_steps_duration_secs': 2.7179718017578125e-05, 'checkpoint_manager_blocking_start_time': 1776896546.3832302, 'checkpoint_manager_blocking_duration_secs': 56.184205055236816} I0422 22:23:22.567551 133387672659776 checkpointing.py:410] Saved a checkpoint at step 15. I0422 22:23:22.568379 133387672659776 metric_logger.py:196] completed step: 14, seconds: 0.148, TFLOP/s/device: 92.092, Tokens/s/device: 13881.170, total_weights: 65536, loss: 5.864, lm_loss: 5.864, perplexity: 352.193 I0422 22:23:22.591164 133387672659776 metric_logger.py:196] completed step: 15, seconds: 0.148, TFLOP/s/device: 92.044, Tokens/s/device: 13873.835, total_weights: 65536, loss: 5.719, lm_loss: 5.719, perplexity: 304.661 I0422 22:23:43.830112 133387672659776 metric_logger.py:196] completed step: 16, seconds: 56.480, TFLOP/s/device: 0.241, Tokens/s/device: 36.261, total_weights: 65536, loss: 5.605, lm_loss: 5.605, perplexity: 271.872 I0422 22:23:43.977433 133387672659776 metric_logger.py:196] completed step: 17, seconds: 21.109, TFLOP/s/device: 0.644, Tokens/s/device: 97.019, total_weights: 65536, loss: 5.517, lm_loss: 5.517, perplexity: 248.975 I0422 22:23:44.124930 133387672659776 metric_logger.py:196] completed step: 18, seconds: 0.153, TFLOP/s/device: 89.049, Tokens/s/device: 13422.379, total_weights: 65536, loss: 5.448, lm_loss: 5.448, perplexity: 232.333 I0422 22:23:44.271732 133387672659776 checkpointing.py:772] Waiting for step 19 to finish before checkpoint... I0422 22:23:44.272439 133387672659776 checkpointing.py:776] Waited 0.0007300376892089844 seconds for step 19 to finish before starting checkpointing. I0422 22:23:44.274542 133387672659776 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0422 22:23:44.276376 133387672659776 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 19 I0422 22:23:44.278406 133387672659776 event_tracking.py:70] [process=6] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_14_async_ckpt_false/checkpoints/19. I0422 22:23:47.592280 133387672659776 future.py:372] [process=6][thread=MainThread][operation_id=3] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture. I0422 22:23:49.485902 133387672659776 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0422 22:23:49.486001 133387672659776 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 I0422 22:23:49.530442 133387672659776 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.045729s I0422 22:23:49.530627 133387672659776 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 31.125 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.049560546875 s) (per-host) I0422 22:23:49.530678 133387672659776 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.049623s (batch_requests_ready=0.001899s, total_serialization_initiated=0.047656s, others=0.000067s) I0422 22:23:49.537324 133387672659776 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.946313s (all_items=0.000027s, per_item={'items': '0.00002718'}, temp_paths=1.946285) I0422 22:23:49.537384 133387672659776 future.py:372] [process=6][thread=MainThread][operation_id=3] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture. I0422 22:23:49.537425 133387672659776 future.py:372] [process=6][thread=MainThread][operation_id=3] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture. I0422 22:23:51.504572 133266954757888 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_14_async_ckpt_false/checkpoints/19/items/array_metadatas/process_6 I0422 22:24:26.948633 133387672659776 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 42.159 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 37.46752953529358 s) (per-host) I0422 22:24:32.384555 133387672659776 event_tracking.py:125] [process=6] [sync] Finished blocking save in 48.11 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_14_async_ckpt_false/checkpoints/19. I0422 22:24:36.380734 133387672659776 event_tracking.py:138] [process=6] [sync] Finished save in 52.10 seconds @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_14_async_ckpt_false/checkpoints/19 I0422 22:24:36.383639 133387672659776 checkpoint_manager.py:2137] [process=6][thread=MainThread][step=19] CheckpointManager Save Finalize is syncing with other hosts... I0422 22:24:36.385344 133387672659776 checkpoint_manager.py:2146] [process=6][thread=MainThread][step=19] CheckpointManager Save Finalize is done on all hosts. I0422 22:24:36.385394 133387672659776 checkpoint_manager.py:1581] [process=6][thread=MainThread][step=19] Finished synchronous save. I0422 22:24:36.385445 133387672659776 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1776896624.2745252, 'wait_for_prev_duration_secs': 6.365776062011719e-05, 'time_between_consecutive_saves_sec': 21.707128047943115, 'checkpointer_blocking_start_time': 1776896624.2764137, 'checkpointer_blocking_duration_secs': 52.10444140434265, 'get_old_steps_start_time': 1776896676.3808694, 'get_old_steps_duration_secs': 2.3126602172851562e-05, 'checkpoint_manager_blocking_start_time': 1776896624.272696, 'checkpoint_manager_blocking_duration_secs': 52.112725257873535} I0422 22:24:36.385537 133387672659776 checkpointing.py:410] Saved a checkpoint at step 19. I0422 22:24:36.385570 133387672659776 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0422 22:24:36.385600 133387672659776 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0422 22:24:36.386294 133387672659776 metric_logger.py:196] completed step: 19, seconds: 0.147, TFLOP/s/device: 92.192, Tokens/s/device: 13896.240, total_weights: 65536, loss: 5.391, lm_loss: 5.391, perplexity: 219.349 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Wed Apr 22 22:24:48 UTC 2026 EXIT_CODE=0