XPK Start: Thu Apr 23 14:07:56 UTC 2026 PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used. `rope_parameters`'s factor field must be a float >= 1, got 40 `rope_parameters`'s beta_fast field must be a float, got 32 `rope_parameters`'s beta_slow field must be a float, got 1 DeepseekV32Config got `key=rope_scaling` in kwargs but hasn't set it as attribute. For RoPE standardization you need to set `self.rope_parameters` in model's config. 2026-04-23 14:08:21.577766: E external/local_xla/xla/stream_executor/cuda/cuda_platform.cc:51] failed call to cuInit: INTERNAL: CUDA error: Failed call to cuInit: UNKNOWN ERROR (303) I0423 14:08:21.790673 139283668178752 max_utils.py:273] Attempting to initialize the jax distributed system... I0423 14:08:30.831251 139283668178752 distributed.py:149] Starting JAX distributed service on [::]:8482 I0423 14:08:30.833780 139283668178752 distributed.py:172] Connecting to JAX distributed service on mt-16-zarr3-true-rs-yznhu-slice-job-0-0.mt-16-zarr3-true-rs-yznhu:8482 I0423 14:08:32.053456 139283668178752 max_utils.py:284] Jax distributed system initialized! I0423 14:08:37.063233 139283668178752 max_utils.py:800] System Information: Jax Version: 0.9.2 I0423 14:08:37.063339 139283668178752 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0423 14:08:37.063380 139283668178752 max_utils.py:802] System Information: Jax Backend: PJRT C API TFRT TPU v6 lite Built on Mar 4 2026 11:32:08 (1772652728) cl/878335365 I0423 14:08:37.063415 139283668178752 train_utils.py:391] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0423 14:08:37.759061 139283668178752 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0423 14:08:37.759652 139283668178752 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0423 14:08:37.759833 139283668178752 checkpointing.py:688] Setting up checkpoint logger... I0423 14:08:37.759884 139283668178752 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0423 14:08:37.759938 139283668178752 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0423 14:08:37.760277 139283668178752 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 0x7eace091cb00>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0423 14:08:39.009895 139283668178752 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0423 14:08:39.010161 139283668178752 checkpoint_manager.py:708] [process=3][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7eabbdef79b0>}, handler_registry=None I0423 14:08:39.010398 139283668178752 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7eabbdef79b0>` for item "items" and save args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>` to `_handler_registry`. I0423 14:08:39.010454 139283668178752 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e991c280980>` for item "metrics" and save args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>` to `_handler_registry`. I0423 14:08:39.010491 139283668178752 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 0x7eabbdef79b0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7eabbdef79b0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e991c280980>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e991c280980>}). I0423 14:08:39.010809 139283668178752 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0423 14:08:39.010880 139283668178752 async_checkpointer.py:192] [process=3][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7e979c771e40> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0423 14:08:40.717263 139161839335168 checkpoint.py:228] Read Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776953057590504891, 'commit_timestamp_nsecs': 1776953102252621127, 'custom_metadata': {}} from gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_16_zarr3_true/checkpoints/0/_CHECKPOINT_METADATA I0423 14:08:40.961685 139161839335168 checkpoint_manager.py:1871] Missing metrics for step 0 I0423 14:08:41.359416 139283668178752 checkpoint_manager.py:1812] Found 3 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_16_zarr3_true/checkpoints I0423 14:08:41.579751 139283668178752 checkpoint_manager.py:929] [process=3][thread=MainThread] CheckpointManager created, primary_host=0, CheckpointManagerOptions=CheckpointManagerOptions(save_interval_steps=1, max_to_keep=None, keep_time_interval=None, keep_period=None, should_keep_fn=None, best_fn=None, best_mode='max', keep_checkpoints_without_metrics=True, step_prefix=None, step_format_fixed_length=None, step_name_format=None, create=True, cleanup_tmp_directories=False, save_on_steps=frozenset(), single_host_load_and_broadcast=False, todelete_subdir=None, todelete_full_path=None, enable_background_delete=False, read_only=False, enable_async_checkpointing=True, async_options=None, multiprocessing_options=MultiprocessingOptions(primary_host=0, active_processes=None, barrier_sync_key_prefix=None), should_save_fn=None, file_options=FileOptions(path_permission_mode=None), save_root_metadata=True, temporary_path_class=None, save_decision_policy=FixedIntervalPolicy(interval=5), preservation_policy=LatestN(n=None), prevent_write_metrics=False, enable_should_save_is_saving_in_progress_check=True, enable_per_process_directory_creation=False, lightweight_initialize=False), root_directory=gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_16_zarr3_true/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7e991c2804d0> I0423 14:08:41.579946 139283668178752 checkpointing.py:302] Checkpoint manager created! I0423 14:08:42.528088 139283668178752 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0423 14:08:42.528195 139283668178752 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 14:08:42.915851 139283668178752 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 14:08:42.915956 139283668178752 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 14:08:42.932518 139283668178752 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 14:08:42.932576 139283668178752 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 14:08:42.956535 139283668178752 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 14:08:42.956611 139283668178752 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 14:08:42.973061 139283668178752 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 14:08:42.973122 139283668178752 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 14:08:42.989598 139283668178752 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 14:08:42.989661 139283668178752 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 14:08:43.014602 139283668178752 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0423 14:08:43.014672 139283668178752 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 14:08:43.036397 139283668178752 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0423 14:08:43.036468 139283668178752 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0423 14:08:43.257014 139283668178752 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0423 14:08:43.257121 139283668178752 checkpointing.py:582] restoring from this run's directory step 9 I0423 14:08:43.519373 139283668178752 event_tracking.py:70] [process=3] [sync] Started load checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_16_zarr3_true/checkpoints/9. I0423 14:08:43.779049 139283668178752 checkpointer.py:307] Restoring checkpoint from gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_16_zarr3_true/checkpoints/9. I0423 14:08:43.779495 139283668178752 event_tracking.py:125] [process=3] [sync] Finished blocking load in 0.26 seconds. Continuing load @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_16_zarr3_true/checkpoints/9. I0423 14:08:45.197006 1457 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0423 14:08:51.957913 139283668178752 jax_array_handlers.py:843] [process=3] /jax/orbax/read/worker/io/requested throughput: 233.543 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 6.76651668548584 s) (per-host) I0423 14:08:51.962882 139283668178752 base_pytree_checkpoint_handler.py:130] [process=3] /jax/checkpoint/read/gbytes_per_sec: 220.370 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 7.18152117729187 s) (per-host) I0423 14:08:51.966122 139283668178752 event_tracking.py:138] [process=3] [sync] Finished load in 8.45 seconds @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_16_zarr3_true/checkpoints/9 I0423 14:08:51.966223 139283668178752 standard_logger.py:34] {'step': 9, 'event_type': 'restore', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_16_zarr3_true/checkpoints', 'checkpointer_start_time': 1776953323.5192738, 'checkpointer_duration_secs': 8.446921348571777, 'checkpoint_manager_start_time': 1776953323.2573988, 'checkpoint_manager_duration_secs': 8.708797931671143} fsdp: 32 I0423 14:08:52.385247 139283668178752 maxtext_utils.py:1880] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0423 14:08:52.385380 139283668178752 maxtext_utils.py:1880] params/params/decoder/layers/mlp/wi_0/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0423 14:08:52.385437 139283668178752 maxtext_utils.py:1880] params/params/decoder/layers/mlp/wi_1/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0423 14:08:52.385502 139283668178752 maxtext_utils.py:1880] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: P('mlp', 'layers', 'embed') Physical: (None, None, 'fsdp') I0423 14:08:52.385557 139283668178752 maxtext_utils.py:1880] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0423 14:08:52.385597 139283668178752 maxtext_utils.py:1880] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0423 14:08:52.385650 139283668178752 maxtext_utils.py:1880] params/params/decoder/layers/self_attention/key/kernel Shape: float32[2048,16,16,128] Logical: P('embed', 'layers', 'kv_heads', 'kv_head_dim') Physical: ('fsdp', None, None, None) I0423 14:08:52.385705 139283668178752 maxtext_utils.py:1880] params/params/decoder/layers/self_attention/out/kernel Shape: float32[16,16,128,2048] Logical: P('heads', 'layers', 'kv', 'embed') Physical: (None, None, None, 'fsdp') I0423 14:08:52.385747 139283668178752 maxtext_utils.py:1880] params/params/decoder/layers/self_attention/query/kernel Shape: float32[2048,16,16,128] Logical: P('embed', 'layers', 'q_heads', 'kv') Physical: ('fsdp', None, None, None) I0423 14:08:52.385785 139283668178752 maxtext_utils.py:1880] params/params/decoder/layers/self_attention/value/kernel Shape: float32[2048,16,16,128] Logical: P('embed', 'layers', 'kv_heads', 'kv_head_dim') Physical: ('fsdp', None, None, None) I0423 14:08:52.385833 139283668178752 maxtext_utils.py:1880] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0423 14:08:52.385881 139283668178752 maxtext_utils.py:1880] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0423 14:08:52.880427 139283668178752 train.py:157] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0423 14:08:52.880528 139283668178752 train.py:157] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0423 14:08:52.896127 139283668178752 train.py:164] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0423 14:08:52.896191 139283668178752 train.py:164] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0423 14:09:03.932711 139283668178752 max_utils.py:791] Total memory size: 1.5 GB, Output size: 0.4 GB, Temp size: 1.1 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB. I0423 14:09:03.933510 139283668178752 metric_logger.py:301] number parameters: 1.104 billion I0423 14:09:15.298237 139283668178752 checkpointing.py:794] Waiting for step 10 to finish before checkpoint... I0423 14:09:15.453787 139283668178752 checkpointing.py:798] Waited 0.15552496910095215 seconds for step 10 to finish before starting checkpointing. I0423 14:09:15.456210 139283668178752 checkpoint_manager.py:2009] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 14:09:15.458160 139283668178752 checkpoint_manager.py:1512] [process=3] Saving checkpoint at step 10 I0423 14:09:15.459847 139283668178752 event_tracking.py:70] [process=3] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_16_zarr3_true/checkpoints/10. I0423 14:09:15.802855 139283668178752 signaling_client.py:364] Using JaxDistributedSignalingClient I0423 14:09:15.804018 139283668178752 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0423 14:09:15.804074 139283668178752 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0423 14:09:16.077872 139283668178752 base_pytree_checkpoint_handler.py:154] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.275098s I0423 14:09:16.078062 139283668178752 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/blocking_gbytes_per_sec: 5.531 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2789039611816406 s) (per-host) I0423 14:09:16.078118 139283668178752 base_pytree_checkpoint_handler.py:768] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.278971s (batch_requests_ready=0.002127s, total_serialization_initiated=0.276768s, others=0.000075s) I0423 14:09:16.078213 139283668178752 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.283232s (all_items=0.000018s, per_item={'items': '0.00001764'}, temp_paths=0.283215) I0423 14:09:16.078953 139283668178752 event_tracking.py:125] [process=3] [async] Finished blocking save in 0.62 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_16_zarr3_true/checkpoints/10. I0423 14:09:16.079243 139161788978944 async_checkpointer.py:76] [process=3][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 14:29:16.079210 I0423 14:09:16.090397 139283668178752 checkpoint_manager.py:1560] [process=3][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize I0423 14:09:16.090731 139160203544320 async_checkpointer.py:280] [process=3][thread=save_finalize] Waiting for background save thread=async_save. I0423 14:09:16.090900 139283668178752 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_16_zarr3_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776953355.456192, 'wait_for_prev_duration_secs': 6.246566772460938e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776953355.4581993, 'checkpointer_blocking_duration_secs': 0.6211934089660645, 'get_old_steps_start_time': 1776953356.0794153, 'get_old_steps_duration_secs': 3.314018249511719e-05, 'checkpoint_manager_blocking_start_time': 1776953355.4543285, 'checkpoint_manager_blocking_duration_secs': 0.6365365982055664} I0423 14:09:16.091007 139283668178752 checkpointing.py:409] Started an asynchronous checkpoint save for step 10 I0423 14:09:16.091058 139283668178752 max_utils.py:750] Memstats: After params initialized: I0423 14:09:16.091106 139283668178752 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_10(process=3,(2,2,0,0)) I0423 14:09:16.091139 139283668178752 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_11(process=3,(3,2,0,0)) I0423 14:09:16.091166 139283668178752 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_14(process=3,(2,3,0,0)) I0423 14:09:16.091191 139283668178752 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_15(process=3,(3,3,0,0)) I0423 14:09:16.838089 139283668178752 metric_logger.py:196] completed step: 10, seconds: 11.365, TFLOP/s/device: 1.196, Tokens/s/device: 180.208, total_weights: 65536, loss: 6.833, lm_loss: 6.833, perplexity: 927.869 I0423 14:09:16.991681 139283668178752 metric_logger.py:196] completed step: 11, seconds: 1.538, TFLOP/s/device: 8.833, Tokens/s/device: 1331.341, total_weights: 65536, loss: 6.527, lm_loss: 6.527, perplexity: 683.659 I0423 14:09:17.139113 139283668178752 metric_logger.py:196] completed step: 12, seconds: 0.006, TFLOP/s/device: 2181.270, Tokens/s/device: 328784.717, total_weights: 65536, loss: 6.265, lm_loss: 6.265, perplexity: 526.068 I0423 14:09:17.286588 139283668178752 metric_logger.py:196] completed step: 13, seconds: 0.153, TFLOP/s/device: 88.663, Tokens/s/device: 13364.221, total_weights: 65536, loss: 6.045, lm_loss: 6.045, perplexity: 422.001 I0423 14:09:17.290914 139283668178752 checkpointing.py:794] Waiting for step 15 to finish before checkpoint... I0423 14:09:17.581166 139283668178752 checkpointing.py:798] Waited 0.2902204990386963 seconds for step 15 to finish before starting checkpointing. I0423 14:09:17.584153 139283668178752 checkpoint_manager.py:2020] [process=3][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 14:09:21.031694 139160715237120 array_metadata_store.py:203] [process=3][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_16_zarr3_true/checkpoints/10/items/array_metadatas/process_3 I0423 14:09:57.714848 139161788978944 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/gbytes_per_sec: 37.685 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.91565537452698 s) (per-host) I0423 14:09:57.714972 139161788978944 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.635617s. I0423 14:10:04.567537 139161788978944 async_checkpointer.py:160] [process=3][thread=async_save] Background save thread done. Time taken: 48.488167s. I0423 14:10:04.567836 139160203544320 async_checkpointer.py:288] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 14:10:04.567973 139160203544320 async_checkpointer.py:298] [process=3][thread=save_finalize] No errors found in background save thread=async_save. I0423 14:10:04.568021 139160203544320 checkpoint_manager.py:2137] [process=3][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts... I0423 14:10:04.569617 139160203544320 checkpoint_manager.py:2146] [process=3][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts. I0423 14:10:04.569803 139283668178752 checkpoint_manager.py:2032] [process=3][thread=MainThread][step=10][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=10. W0423 14:10:04.569958 139283668178752 checkpoint_manager.py:1452] Waiting for previous save to complete took 46.985789 seconds. If this number is high, consider checkpointing less frequently. I0423 14:10:04.571999 139283668178752 checkpoint_manager.py:1512] [process=3] Saving checkpoint at step 15 I0423 14:10:04.574532 139283668178752 event_tracking.py:70] [process=3] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_16_zarr3_true/checkpoints/15. I0423 14:10:04.868812 139283668178752 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0423 14:10:04.868906 139283668178752 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0423 14:10:04.895098 139283668178752 base_pytree_checkpoint_handler.py:154] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.027487s I0423 14:10:04.895276 139283668178752 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/blocking_gbytes_per_sec: 49.849 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.03094482421875 s) (per-host) I0423 14:10:04.895330 139283668178752 base_pytree_checkpoint_handler.py:768] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.031009s (batch_requests_ready=0.001768s, total_serialization_initiated=0.029171s, others=0.000070s) I0423 14:10:04.895428 139283668178752 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.036149s (all_items=0.000013s, per_item={'items': '0.00001311'}, temp_paths=0.036136) I0423 14:10:04.896119 139283668178752 event_tracking.py:125] [process=3] [async] Finished blocking save in 0.32 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_16_zarr3_true/checkpoints/15. I0423 14:10:04.896453 139160203544320 async_checkpointer.py:76] [process=3][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 14:30:04.896415 I0423 14:10:04.909461 139283668178752 checkpoint_manager.py:1560] [process=3][thread=MainThread][step=15] Starting CheckpointManager Save Finalize thread=save_finalize I0423 14:10:04.909726 139158032389888 async_checkpointer.py:280] [process=3][thread=save_finalize] Waiting for background save thread=async_save. I0423 14:10:04.909869 139283668178752 standard_logger.py:34] {'step': 15, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_16_zarr3_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776953357.5841246, 'wait_for_prev_duration_secs': 46.98578929901123, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776953404.5720396, 'checkpointer_blocking_duration_secs': 0.32456398010253906, 'get_old_steps_start_time': 1776953404.896628, 'get_old_steps_duration_secs': 3.123283386230469e-05, 'checkpoint_manager_blocking_start_time': 1776953357.5817828, 'checkpoint_manager_blocking_duration_secs': 47.32805109024048} I0423 14:10:04.909989 139283668178752 checkpointing.py:409] Started an asynchronous checkpoint save for step 15 I0423 14:10:04.910850 139283668178752 metric_logger.py:196] completed step: 14, seconds: 0.147, TFLOP/s/device: 92.231, Tokens/s/device: 13901.994, total_weights: 65536, loss: 5.864, lm_loss: 5.864, perplexity: 352.193 I0423 14:10:04.916981 139283668178752 metric_logger.py:196] completed step: 15, seconds: 0.147, TFLOP/s/device: 92.116, Tokens/s/device: 13884.746, total_weights: 65536, loss: 5.719, lm_loss: 5.719, perplexity: 304.661 I0423 14:10:10.076904 139160715237120 array_metadata_store.py:203] [process=3][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_16_zarr3_true/checkpoints/15/items/array_metadatas/process_3 I0423 14:10:26.169163 139283668178752 metric_logger.py:196] completed step: 16, seconds: 47.624, TFLOP/s/device: 0.285, Tokens/s/device: 43.003, total_weights: 65536, loss: 5.605, lm_loss: 5.605, perplexity: 271.872 I0423 14:10:26.316328 139283668178752 metric_logger.py:196] completed step: 17, seconds: 21.106, TFLOP/s/device: 0.644, Tokens/s/device: 97.034, total_weights: 65536, loss: 5.517, lm_loss: 5.517, perplexity: 248.975 I0423 14:10:26.463722 139283668178752 metric_logger.py:196] completed step: 18, seconds: 0.153, TFLOP/s/device: 88.952, Tokens/s/device: 13407.880, total_weights: 65536, loss: 5.448, lm_loss: 5.448, perplexity: 232.333 I0423 14:10:26.610327 139283668178752 checkpointing.py:794] Waiting for step 19 to finish before checkpoint... I0423 14:10:26.611101 139283668178752 checkpointing.py:798] Waited 0.0007913112640380859 seconds for step 19 to finish before starting checkpointing. I0423 14:10:26.613425 139283668178752 checkpoint_manager.py:2020] [process=3][thread=MainThread][step=15][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 14:10:46.965851 139160203544320 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/gbytes_per_sec: 37.519 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.10148000717163 s) (per-host) I0423 14:10:46.965996 139160203544320 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.069420s. I0423 14:10:52.712222 139160203544320 async_checkpointer.py:160] [process=3][thread=async_save] Background save thread done. Time taken: 47.815631s. I0423 14:10:52.712433 139158032389888 async_checkpointer.py:288] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 14:10:52.712498 139158032389888 async_checkpointer.py:298] [process=3][thread=save_finalize] No errors found in background save thread=async_save. I0423 14:10:52.712551 139158032389888 checkpoint_manager.py:2137] [process=3][thread=save_finalize][step=15] CheckpointManager Save Finalize is syncing with other hosts... I0423 14:10:52.714034 139158032389888 checkpoint_manager.py:2146] [process=3][thread=save_finalize][step=15] CheckpointManager Save Finalize is done on all hosts. I0423 14:10:52.714196 139283668178752 checkpoint_manager.py:2032] [process=3][thread=MainThread][step=15][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=15. W0423 14:10:52.714325 139283668178752 checkpoint_manager.py:1452] Waiting for previous save to complete took 26.100922 seconds. If this number is high, consider checkpointing less frequently. I0423 14:10:52.715856 139283668178752 checkpoint_manager.py:1512] [process=3] Saving checkpoint at step 19 I0423 14:10:52.717972 139283668178752 event_tracking.py:70] [process=3] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_16_zarr3_true/checkpoints/19. I0423 14:10:53.014271 139283668178752 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0423 14:10:53.014361 139283668178752 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0423 14:10:53.040344 139283668178752 base_pytree_checkpoint_handler.py:154] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.027075s I0423 14:10:53.040514 139283668178752 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/blocking_gbytes_per_sec: 50.422 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.030593156814575195 s) (per-host) I0423 14:10:53.040565 139283668178752 base_pytree_checkpoint_handler.py:768] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.030654s (batch_requests_ready=0.001674s, total_serialization_initiated=0.028915s, others=0.000066s) I0423 14:10:53.040664 139283668178752 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.034774s (all_items=0.000011s, per_item={'items': '0.00001097'}, temp_paths=0.034763) I0423 14:10:53.041330 139283668178752 event_tracking.py:125] [process=3] [async] Finished blocking save in 0.33 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_16_zarr3_true/checkpoints/19. I0423 14:10:53.041671 139155365594880 async_checkpointer.py:76] [process=3][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 14:30:53.041633 I0423 14:10:53.047375 139283668178752 checkpoint_manager.py:1560] [process=3][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize I0423 14:10:53.047666 139158032389888 async_checkpointer.py:280] [process=3][thread=save_finalize] Waiting for background save thread=async_save. I0423 14:10:53.047837 139283668178752 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_16_zarr3_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776953426.6133773, 'wait_for_prev_duration_secs': 26.100922107696533, 'time_between_consecutive_saves_sec': 22.043720722198486, 'checkpointer_blocking_start_time': 1776953452.7158968, 'checkpointer_blocking_duration_secs': 0.32593441009521484, 'get_old_steps_start_time': 1776953453.041851, 'get_old_steps_duration_secs': 2.9325485229492188e-05, 'checkpoint_manager_blocking_start_time': 1776953426.6113675, 'checkpoint_manager_blocking_duration_secs': 26.43643569946289} I0423 14:10:53.047957 139283668178752 checkpointing.py:409] Started an asynchronous checkpoint save for step 19 I0423 14:10:53.048002 139283668178752 checkpoint_manager.py:2020] [process=3][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 14:10:58.310548 139160715237120 array_metadata_store.py:203] [process=3][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_16_zarr3_true/checkpoints/19/items/array_metadatas/process_3 I0423 14:11:34.746880 139155365594880 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/gbytes_per_sec: 37.847 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.736918926239014 s) (per-host) I0423 14:11:34.747014 139155365594880 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.705221s. I0423 14:11:40.668104 139155365594880 async_checkpointer.py:160] [process=3][thread=async_save] Background save thread done. Time taken: 47.626296s. I0423 14:11:40.668402 139158032389888 async_checkpointer.py:288] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 14:11:40.668521 139158032389888 async_checkpointer.py:298] [process=3][thread=save_finalize] No errors found in background save thread=async_save. I0423 14:11:40.668564 139158032389888 checkpoint_manager.py:2137] [process=3][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts... I0423 14:11:40.670142 139158032389888 checkpoint_manager.py:2146] [process=3][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts. I0423 14:11:40.670311 139283668178752 checkpoint_manager.py:2032] [process=3][thread=MainThread][step=19][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=19. I0423 14:11:40.670464 139283668178752 checkpoint_manager.py:2009] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 14:11:40.671377 139283668178752 metric_logger.py:196] completed step: 19, seconds: 0.147, TFLOP/s/device: 92.349, Tokens/s/device: 13919.852, total_weights: 65536, loss: 5.391, lm_loss: 5.391, perplexity: 219.349 Per train step: Total TFLOPs: 13.59 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Thu Apr 23 14:11:52 UTC 2026 EXIT_CODE=0