XPK Start: Fri Apr 24 12:21:09 UTC 2026 PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used. `rope_parameters`'s factor field must be a float >= 1, got 40 `rope_parameters`'s beta_fast field must be a float, got 32 `rope_parameters`'s beta_slow field must be a float, got 1 DeepseekV32Config got `key=rope_scaling` in kwargs but hasn't set it as attribute. For RoPE standardization you need to set `self.rope_parameters` in model's config. 2026-04-24 12:21:34.626713: E external/local_xla/xla/stream_executor/cuda/cuda_platform.cc:51] failed call to cuInit: INTERNAL: CUDA error: Failed call to cuInit: UNKNOWN ERROR (303) I0424 12:21:34.841646 137067711661888 max_utils.py:273] Attempting to initialize the jax distributed system... I0424 12:21:43.883840 137067711661888 distributed.py:149] Starting JAX distributed service on [::]:8482 I0424 12:21:43.886141 137067711661888 distributed.py:172] Connecting to JAX distributed service on mt-07-eval-yjtbo-slice-job-0-0.mt-07-eval-yjtbo:8482 I0424 12:21:45.165859 137067711661888 max_utils.py:284] Jax distributed system initialized! I0424 12:21:50.242563 137067711661888 max_utils.py:800] System Information: Jax Version: 0.9.2 I0424 12:21:50.242671 137067711661888 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0424 12:21:50.242710 137067711661888 max_utils.py:802] System Information: Jax Backend: PJRT C API TFRT TPU v6 lite Built on Mar 4 2026 11:32:08 (1772652728) cl/878335365 I0424 12:21:50.242745 137067711661888 train_utils.py:391] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0424 12:21:50.951351 137067711661888 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0424 12:21:50.951946 137067711661888 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0424 12:21:50.952143 137067711661888 checkpointing.py:688] Setting up checkpoint logger... I0424 12:21:50.952193 137067711661888 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0424 12:21:50.952237 137067711661888 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0424 12:21:50.952609 137067711661888 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 0x7ca8d894cce0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0424 12:21:53.833204 137067711661888 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0424 12:21:53.833444 137067711661888 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 0x7c955436bfe0>}, handler_registry=None I0424 12:21:53.833683 137067711661888 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7c955436bfe0>` for item "items" and save args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>` to `_handler_registry`. I0424 12:21:53.833733 137067711661888 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7c955436dfd0>` for item "metrics" and save args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>` to `_handler_registry`. I0424 12:21:53.833771 137067711661888 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 0x7c955436bfe0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7c955436bfe0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7c955436dfd0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7c955436dfd0>}). I0424 12:21:53.834113 137067711661888 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0424 12:21:53.834187 137067711661888 async_checkpointer.py:192] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7c945866dd00> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0424 12:21:54.763429 137067711661888 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_07_eval/checkpoints I0424 12:21:54.777839 137067711661888 checkpoint_manager.py:929] [process=6][thread=MainThread] CheckpointManager created, primary_host=0, CheckpointManagerOptions=CheckpointManagerOptions(save_interval_steps=1, max_to_keep=None, keep_time_interval=None, keep_period=None, should_keep_fn=None, best_fn=None, best_mode='max', keep_checkpoints_without_metrics=True, step_prefix=None, step_format_fixed_length=None, step_name_format=None, create=True, cleanup_tmp_directories=False, save_on_steps=frozenset(), single_host_load_and_broadcast=False, todelete_subdir=None, todelete_full_path=None, enable_background_delete=False, read_only=False, enable_async_checkpointing=True, async_options=None, multiprocessing_options=MultiprocessingOptions(primary_host=0, active_processes=None, barrier_sync_key_prefix=None), should_save_fn=None, file_options=FileOptions(path_permission_mode=None), save_root_metadata=True, temporary_path_class=None, save_decision_policy=FixedIntervalPolicy(interval=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_feat_nnx_post_train_fixes_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_07_eval/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7c955436dac0> I0424 12:21:54.777961 137067711661888 checkpointing.py:302] Checkpoint manager created! I0424 12:21:55.723216 137067711661888 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0424 12:21:55.723327 137067711661888 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0424 12:21:56.116297 137067711661888 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn'). I0424 12:21:56.116389 137067711661888 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0424 12:21:56.132848 137067711661888 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn'). I0424 12:21:56.132909 137067711661888 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0424 12:21:56.157020 137067711661888 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim'). I0424 12:21:56.157089 137067711661888 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 12:21:56.173631 137067711661888 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim'). I0424 12:21:56.173692 137067711661888 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 12:21:56.190167 137067711661888 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim'). I0424 12:21:56.190226 137067711661888 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 12:21:56.214920 137067711661888 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch_attn', 'activation_length_attn', 'activation_heads', 'activation_kv'). I0424 12:21:56.214989 137067711661888 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 12:21:56.235909 137067711661888 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0424 12:21:56.235973 137067711661888 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0424 12:21:56.458308 137067711661888 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0424 12:21:56.458417 137067711661888 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0424 12:21:57.899561 137067711661888 maxtext_utils.py:1880] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0424 12:21:57.899693 137067711661888 maxtext_utils.py:1880] params/params/decoder/layers/mlp/wi_0/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0424 12:21:57.899748 137067711661888 maxtext_utils.py:1880] params/params/decoder/layers/mlp/wi_1/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0424 12:21:57.899806 137067711661888 maxtext_utils.py:1880] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: P('mlp', 'layers', 'embed') Physical: (None, None, 'fsdp') I0424 12:21:57.899859 137067711661888 maxtext_utils.py:1880] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0424 12:21:57.899899 137067711661888 maxtext_utils.py:1880] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0424 12:21:57.899951 137067711661888 maxtext_utils.py:1880] params/params/decoder/layers/self_attention/key/kernel Shape: float32[2048,16,16,128] Logical: P('embed', 'layers', 'kv_heads', 'kv_head_dim') Physical: ('fsdp', None, None, None) I0424 12:21:57.900003 137067711661888 maxtext_utils.py:1880] params/params/decoder/layers/self_attention/out/kernel Shape: float32[16,16,128,2048] Logical: P('heads', 'layers', 'kv', 'embed') Physical: (None, None, None, 'fsdp') I0424 12:21:57.900043 137067711661888 maxtext_utils.py:1880] params/params/decoder/layers/self_attention/query/kernel Shape: float32[2048,16,16,128] Logical: P('embed', 'layers', 'q_heads', 'kv') Physical: ('fsdp', None, None, None) I0424 12:21:57.900079 137067711661888 maxtext_utils.py:1880] params/params/decoder/layers/self_attention/value/kernel Shape: float32[2048,16,16,128] Logical: P('embed', 'layers', 'kv_heads', 'kv_head_dim') Physical: ('fsdp', None, None, None) I0424 12:21:57.900141 137067711661888 maxtext_utils.py:1880] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0424 12:21:57.900194 137067711661888 maxtext_utils.py:1880] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0424 12:21:58.398997 137067711661888 train.py:157] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0424 12:21:58.399091 137067711661888 train.py:157] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0424 12:21:58.414954 137067711661888 train.py:164] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0424 12:21:58.415014 137067711661888 train.py:164] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0424 12:22:09.494306 137067711661888 max_utils.py:791] Total memory size: 1.5 GB, Output size: 0.4 GB, Temp size: 1.1 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB. I0424 12:22:09.495149 137067711661888 metric_logger.py:301] number parameters: 1.104 billion I0424 12:22:20.928627 137067711661888 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0424 12:22:21.084446 137067711661888 checkpointing.py:798] Waited 0.15580272674560547 seconds for step 0 to finish before starting checkpointing. I0424 12:22:21.088546 137067711661888 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0424 12:22:21.090082 137067711661888 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 0 I0424 12:22:21.091676 137067711661888 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_07_eval/checkpoints/0. I0424 12:22:21.397583 137067711661888 signaling_client.py:364] Using JaxDistributedSignalingClient I0424 12:22:21.398606 137067711661888 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0424 12:22:21.398679 137067711661888 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0424 12:22:21.678745 137067711661888 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.281246s I0424 12:22:21.678921 137067711661888 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.372 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28716039657592773 s) (per-host) I0424 12:22:21.678976 137067711661888 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.287225s (batch_requests_ready=0.002296s, total_serialization_initiated=0.284855s, others=0.000074s) I0424 12:22:21.679066 137067711661888 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.291499s (all_items=0.000023s, per_item={'items': '0.00002265'}, temp_paths=0.291476) I0424 12:22:21.679905 137067711661888 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.59 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_07_eval/checkpoints/0. I0424 12:22:21.680250 136942380640000 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-24 12:42:21.680212 I0424 12:22:21.686320 137067711661888 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0424 12:22:21.686636 136939722237696 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0424 12:22:21.686792 137067711661888 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_07_eval/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777033341.0885258, 'wait_for_prev_duration_secs': 7.104873657226562e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777033341.0901382, 'checkpointer_blocking_duration_secs': 0.5902657508850098, 'get_old_steps_start_time': 1777033341.6804314, 'get_old_steps_duration_secs': 2.9087066650390625e-05, 'checkpoint_manager_blocking_start_time': 1777033341.0849435, 'checkpoint_manager_blocking_duration_secs': 0.6018099784851074} I0424 12:22:21.686895 137067711661888 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0424 12:22:21.686943 137067711661888 max_utils.py:750] Memstats: After params initialized: I0424 12:22:21.686992 137067711661888 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0)) I0424 12:22:21.687024 137067711661888 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0)) I0424 12:22:21.687052 137067711661888 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0)) I0424 12:22:21.687075 137067711661888 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0)) I0424 12:22:22.005984 137067711661888 metric_logger.py:196] completed step: 0, seconds: 11.433, TFLOP/s/device: 1.188, Tokens/s/device: 179.125, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875 I0424 12:22:22.174569 137067711661888 metric_logger.py:196] completed step: 1, seconds: 1.076, TFLOP/s/device: 12.629, Tokens/s/device: 1903.641, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875 I0424 12:22:22.599981 137067711661888 metric_logger.py:196] completed step: 2, seconds: 0.021, TFLOP/s/device: 640.510, Tokens/s/device: 96544.572, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28637.129 I0424 12:22:22.747179 137067711661888 metric_logger.py:196] completed step: 3, seconds: 0.425, TFLOP/s/device: 31.950, Tokens/s/device: 4815.821, total_weights: 65536, loss: 9.734, lm_loss: 9.734, perplexity: 16889.203 I0424 12:22:23.042087 137067711661888 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.612, Tokens/s/device: 13356.638, total_weights: 65536, loss: 9.277, lm_loss: 9.277, perplexity: 10694.614 I0424 12:22:23.047779 137067711661888 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.340, Tokens/s/device: 13918.528, total_weights: 65536, loss: 8.892, lm_loss: 8.892, perplexity: 7270.717 I0424 12:22:29.571316 2767 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0424 12:22:31.604780 136939730630400 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_07_eval/checkpoints/0/items/array_metadatas/process_6 I0424 12:22:44.803610 137067711661888 metric_logger.py:196] completed step: 6, seconds: 0.295, TFLOP/s/device: 46.004, Tokens/s/device: 6934.216, total_weights: 65536, loss: 8.592, lm_loss: 8.592, perplexity: 5390.759 I0424 12:22:44.951048 137067711661888 metric_logger.py:196] completed step: 7, seconds: 21.609, TFLOP/s/device: 0.629, Tokens/s/device: 94.775, total_weights: 65536, loss: 8.384, lm_loss: 8.384, perplexity: 4376.905 I0424 12:22:45.098358 137067711661888 metric_logger.py:196] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.219, Tokens/s/device: 13448.027, total_weights: 65536, loss: 8.255, lm_loss: 8.255, perplexity: 3846.406 I0424 12:22:45.244930 137067711661888 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0424 12:22:45.245596 137067711661888 checkpointing.py:798] Waited 0.0006873607635498047 seconds for step 9 to finish before starting checkpointing. I0424 12:22:45.247691 137067711661888 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0424 12:23:03.342448 136942380640000 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 37.654 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.950663566589355 s) (per-host) I0424 12:23:03.342551 136942380640000 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.662184s. I0424 12:23:13.025286 136942380640000 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 51.344902s. I0424 12:23:13.025577 136939722237696 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0424 12:23:13.025703 136939722237696 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0424 12:23:13.025755 136939722237696 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0424 12:23:13.027582 136939722237696 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0424 12:23:13.027739 137067711661888 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0. W0424 12:23:13.027884 137067711661888 checkpoint_manager.py:1452] Waiting for previous save to complete took 27.780195 seconds. If this number is high, consider checkpointing less frequently. I0424 12:23:13.029751 137067711661888 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 9 I0424 12:23:13.031821 137067711661888 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_07_eval/checkpoints/9. I0424 12:23:13.320155 137067711661888 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0424 12:23:13.320248 137067711661888 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False I0424 12:23:13.356091 137067711661888 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.037105s I0424 12:23:13.356267 137067711661888 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 38.056 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.040534019470214844 s) (per-host) I0424 12:23:13.356319 137067711661888 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.040595s (batch_requests_ready=0.001794s, total_serialization_initiated=0.038731s, others=0.000069s) I0424 12:23:13.356408 137067711661888 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.044590s (all_items=0.000015s, per_item={'items': '0.00001550'}, temp_paths=0.044575) I0424 12:23:13.357088 137067711661888 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.33 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_07_eval/checkpoints/9. I0424 12:23:13.357474 136939722237696 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-24 12:43:13.357435 I0424 12:23:13.359391 137067711661888 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0424 12:23:13.359617 136914430588672 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0424 12:23:13.359748 137067711661888 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_07_eval/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777033365.24766, 'wait_for_prev_duration_secs': 27.780194759368896, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777033393.0297897, 'checkpointer_blocking_duration_secs': 0.3278326988220215, 'get_old_steps_start_time': 1777033393.3576467, 'get_old_steps_duration_secs': 3.0279159545898438e-05, 'checkpoint_manager_blocking_start_time': 1777033365.2458184, 'checkpoint_manager_blocking_duration_secs': 28.11389684677124} I0424 12:23:13.359907 137067711661888 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0424 12:23:13.359952 137067711661888 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0424 12:23:19.335560 136939730630400 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_07_eval/checkpoints/9/items/array_metadatas/process_6 I0424 12:23:55.246150 136939722237696 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 37.672 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.93036079406738 s) (per-host) I0424 12:23:55.246279 136939722237696 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.888691s. I0424 12:24:04.090341 136939722237696 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 50.732726s. I0424 12:24:04.090646 136914430588672 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0424 12:24:04.090764 136914430588672 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0424 12:24:04.090811 136914430588672 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0424 12:24:04.093214 136914430588672 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0424 12:24:04.093425 137067711661888 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9. I0424 12:24:04.093584 137067711661888 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0424 12:24:04.094589 137067711661888 metric_logger.py:196] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.259, Tokens/s/device: 13906.336, 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: Fri Apr 24 12:24:14 UTC 2026 EXIT_CODE=0