XPK Start: Fri Apr 24 09:15:22 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 09:15:47.205075: 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 09:15:47.414258 136699630667584 max_utils.py:273] Attempting to initialize the jax distributed system... I0424 09:15:56.453177 136699630667584 distributed.py:149] Starting JAX distributed service on [::]:8482 I0424 09:15:56.455431 136699630667584 distributed.py:172] Connecting to JAX distributed service on mt-02-synthetic-n34dg-slice-job-0-0.mt-02-synthetic-n34dg:8482 I0424 09:15:57.831601 136699630667584 max_utils.py:284] Jax distributed system initialized! I0424 09:16:03.061333 136699630667584 max_utils.py:800] System Information: Jax Version: 0.9.2 I0424 09:16:03.061439 136699630667584 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0424 09:16:03.061480 136699630667584 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 09:16:03.061516 136699630667584 train_utils.py:391] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0424 09:16:03.760261 136699630667584 maxtext_utils.py:1732] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0424 09:16:03.760860 136699630667584 maxtext_utils.py:1732] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0424 09:16:03.761042 136699630667584 checkpointing.py:688] Setting up checkpoint logger... I0424 09:16:03.761091 136699630667584 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0424 09:16:03.761135 136699630667584 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0424 09:16:03.761484 136699630667584 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 0x7c5346910560>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0424 09:16:06.754805 136699630667584 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0424 09:16:06.755011 136699630667584 checkpoint_manager.py:708] [process=5][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7c3fac45eab0>}, handler_registry=None I0424 09:16:06.755245 136699630667584 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7c3fac45eab0>` 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 09:16:06.755294 136699630667584 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7c3fac4627e0>` 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 09:16:06.755330 136699630667584 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 0x7c3fac45eab0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7c3fac45eab0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7c3fac4627e0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7c3fac4627e0>}). I0424 09:16:06.755665 136699630667584 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0424 09:16:06.755736 136699630667584 async_checkpointer.py:192] [process=5][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7c3fac165d00> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0424 09:16:07.449172 136699630667584 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260424_091312/linen_xpk_feat_nnx_trainstate_and_training_loop_20260424_091312_02_synthetic/checkpoints I0424 09:16:07.475774 136699630667584 checkpoint_manager.py:929] [process=5][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_trainstate_and_training_loop_20260424_091312/linen_xpk_feat_nnx_trainstate_and_training_loop_20260424_091312_02_synthetic/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7c3fac45f320> I0424 09:16:07.475897 136699630667584 checkpointing.py:302] Checkpoint manager created! I0424 09:16:08.416129 136699630667584 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0424 09:16:08.416236 136699630667584 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0424 09:16:08.793437 136699630667584 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0424 09:16:08.793530 136699630667584 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0424 09:16:08.810026 136699630667584 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0424 09:16:08.810085 136699630667584 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0424 09:16:08.833891 136699630667584 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0424 09:16:08.833957 136699630667584 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 09:16:08.850584 136699630667584 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0424 09:16:08.850646 136699630667584 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 09:16:08.867070 136699630667584 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0424 09:16:08.867134 136699630667584 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 09:16:08.892027 136699630667584 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0424 09:16:08.892096 136699630667584 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0424 09:16:08.912960 136699630667584 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0424 09:16:08.913023 136699630667584 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0424 09:16:09.133190 136699630667584 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0424 09:16:09.133301 136699630667584 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0424 09:16:10.575399 136699630667584 maxtext_utils.py:1835] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0424 09:16:10.575525 136699630667584 maxtext_utils.py:1835] params/params/decoder/layers/mlp/wi_0/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0424 09:16:10.575585 136699630667584 maxtext_utils.py:1835] params/params/decoder/layers/mlp/wi_1/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0424 09:16:10.575645 136699630667584 maxtext_utils.py:1835] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: P('mlp', 'layers', 'embed') Physical: (None, None, 'fsdp') I0424 09:16:10.575759 136699630667584 maxtext_utils.py:1835] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0424 09:16:10.575800 136699630667584 maxtext_utils.py:1835] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0424 09:16:10.575853 136699630667584 maxtext_utils.py:1835] 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 09:16:10.575906 136699630667584 maxtext_utils.py:1835] 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 09:16:10.575944 136699630667584 maxtext_utils.py:1835] 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 09:16:10.575979 136699630667584 maxtext_utils.py:1835] 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 09:16:10.576025 136699630667584 maxtext_utils.py:1835] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0424 09:16:10.576076 136699630667584 maxtext_utils.py:1835] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0424 09:16:11.070740 136699630667584 train.py:157] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0424 09:16:11.070827 136699630667584 train.py:157] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0424 09:16:11.086396 136699630667584 train.py:164] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0424 09:16:11.086457 136699630667584 train.py:164] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0424 09:16:22.166027 136699630667584 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 09:16:22.166787 136699630667584 metric_logger.py:301] number parameters: 1.104 billion I0424 09:16:33.286716 136699630667584 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0424 09:16:33.440545 136699630667584 checkpointing.py:798] Waited 0.15380859375 seconds for step 0 to finish before starting checkpointing. I0424 09:16:33.443117 136699630667584 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0424 09:16:33.444723 136699630667584 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 0 I0424 09:16:33.446207 136699630667584 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260424_091312/linen_xpk_feat_nnx_trainstate_and_training_loop_20260424_091312_02_synthetic/checkpoints/0. I0424 09:16:33.791632 136699630667584 signaling_client.py:364] Using JaxDistributedSignalingClient I0424 09:16:33.792567 136699630667584 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0424 09:16:33.792624 136699630667584 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 09:16:34.072392 136699630667584 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.280829s I0424 09:16:34.072568 136699630667584 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 5.382 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2866334915161133 s) (per-host) I0424 09:16:34.072619 136699630667584 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.286695s (batch_requests_ready=0.002645s, total_serialization_initiated=0.283981s, others=0.000069s) I0424 09:16:34.072722 136699630667584 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.290789s (all_items=0.000017s, per_item={'items': '0.00001740'}, temp_paths=0.290772) I0424 09:16:34.073484 136699630667584 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.63 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260424_091312/linen_xpk_feat_nnx_trainstate_and_training_loop_20260424_091312_02_synthetic/checkpoints/0. I0424 09:16:34.073815 136574276036352 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-24 09:36:34.073777 I0424 09:16:34.075811 136699630667584 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0424 09:16:34.076047 136572682888960 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0424 09:16:34.076158 136699630667584 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260424_091312/linen_xpk_feat_nnx_trainstate_and_training_loop_20260424_091312_02_synthetic/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777022193.4430985, 'wait_for_prev_duration_secs': 6.151199340820312e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777022193.4447606, 'checkpointer_blocking_duration_secs': 0.6292121410369873, 'get_old_steps_start_time': 1777022194.0739956, 'get_old_steps_duration_secs': 2.956390380859375e-05, 'checkpoint_manager_blocking_start_time': 1777022193.4410667, 'checkpoint_manager_blocking_duration_secs': 0.6350533962249756} I0424 09:16:34.076268 136699630667584 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0424 09:16:34.076313 136699630667584 max_utils.py:750] Memstats: After params initialized: I0424 09:16:34.076360 136699630667584 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_18(process=5,(2,4,0,0)) I0424 09:16:34.076390 136699630667584 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_19(process=5,(3,4,0,0)) I0424 09:16:34.076416 136699630667584 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_22(process=5,(2,5,0,0)) I0424 09:16:34.076440 136699630667584 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_23(process=5,(3,5,0,0)) I0424 09:16:34.387674 136699630667584 metric_logger.py:196] completed step: 0, seconds: 11.120, TFLOP/s/device: 1.222, Tokens/s/device: 184.176, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875 I0424 09:16:34.558355 136699630667584 metric_logger.py:196] completed step: 1, seconds: 1.099, TFLOP/s/device: 12.359, Tokens/s/device: 1862.878, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875 I0424 09:16:34.975668 136699630667584 metric_logger.py:196] completed step: 2, seconds: 0.023, TFLOP/s/device: 580.771, Tokens/s/device: 87540.073, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28637.129 I0424 09:16:35.123137 136699630667584 metric_logger.py:196] completed step: 3, seconds: 0.418, TFLOP/s/device: 32.529, Tokens/s/device: 4903.087, total_weights: 65536, loss: 9.734, lm_loss: 9.734, perplexity: 16889.203 I0424 09:16:35.418254 136699630667584 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.889, Tokens/s/device: 13398.319, total_weights: 65536, loss: 9.277, lm_loss: 9.277, perplexity: 10694.614 I0424 09:16:35.424004 136699630667584 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.173, Tokens/s/device: 13893.317, total_weights: 65536, loss: 8.892, lm_loss: 8.892, perplexity: 7270.717 I0424 09:16:37.540692 2768 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0424 09:16:39.743181 136573198747392 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260424_091312/linen_xpk_feat_nnx_trainstate_and_training_loop_20260424_091312_02_synthetic/checkpoints/0/items/array_metadatas/process_5 I0424 09:16:57.070765 136699630667584 metric_logger.py:196] completed step: 6, seconds: 0.296, TFLOP/s/device: 45.978, Tokens/s/device: 6930.274, total_weights: 65536, loss: 8.592, lm_loss: 8.592, perplexity: 5390.759 I0424 09:16:57.218164 136699630667584 metric_logger.py:196] completed step: 7, seconds: 21.499, TFLOP/s/device: 0.632, Tokens/s/device: 95.260, total_weights: 65536, loss: 8.384, lm_loss: 8.384, perplexity: 4376.905 I0424 09:16:57.365829 136699630667584 metric_logger.py:196] completed step: 8, seconds: 0.153, TFLOP/s/device: 88.804, Tokens/s/device: 13385.446, total_weights: 65536, loss: 8.255, lm_loss: 8.255, perplexity: 3846.406 I0424 09:16:57.512559 136699630667584 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0424 09:16:57.513249 136699630667584 checkpointing.py:798] Waited 0.0007119178771972656 seconds for step 9 to finish before starting checkpointing. I0424 09:16:57.515323 136699630667584 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0424 09:17:11.398423 136574276036352 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 41.997 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 37.61244773864746 s) (per-host) I0424 09:17:11.398546 136574276036352 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 37.324618s. I0424 09:17:17.426077 136574276036352 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 43.352132s. I0424 09:17:17.426346 136572682888960 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0424 09:17:17.426410 136572682888960 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0424 09:17:17.426466 136572682888960 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0424 09:17:17.429429 136572682888960 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0424 09:17:17.429631 136699630667584 checkpoint_manager.py:2032] [process=5][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0. W0424 09:17:17.429805 136699630667584 checkpoint_manager.py:1452] Waiting for previous save to complete took 19.914480 seconds. If this number is high, consider checkpointing less frequently. I0424 09:17:17.431670 136699630667584 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 9 I0424 09:17:17.433635 136699630667584 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260424_091312/linen_xpk_feat_nnx_trainstate_and_training_loop_20260424_091312_02_synthetic/checkpoints/9. I0424 09:17:17.727997 136699630667584 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0424 09:17:17.728089 136699630667584 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 09:17:17.766781 136699630667584 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.039697s I0424 09:17:17.766960 136699630667584 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 35.582 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04335308074951172 s) (per-host) I0424 09:17:17.767009 136699630667584 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.043411s (batch_requests_ready=0.001921s, total_serialization_initiated=0.041416s, others=0.000074s) I0424 09:17:17.767095 136699630667584 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.047406s (all_items=0.000015s, per_item={'items': '0.00001550'}, temp_paths=0.047391) I0424 09:17:17.767797 136699630667584 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.34 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260424_091312/linen_xpk_feat_nnx_trainstate_and_training_loop_20260424_091312_02_synthetic/checkpoints/9. I0424 09:17:17.768105 136572682888960 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-24 09:37:17.768072 I0424 09:17:17.770033 136699630667584 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0424 09:17:17.770251 136546061608704 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0424 09:17:17.770380 136699630667584 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260424_091312/linen_xpk_feat_nnx_trainstate_and_training_loop_20260424_091312_02_synthetic/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777022217.515293, 'wait_for_prev_duration_secs': 19.914480447769165, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777022237.4317076, 'checkpointer_blocking_duration_secs': 0.3365457057952881, 'get_old_steps_start_time': 1777022237.7682757, 'get_old_steps_duration_secs': 2.956390380859375e-05, 'checkpoint_manager_blocking_start_time': 1777022217.5134742, 'checkpoint_manager_blocking_duration_secs': 20.256871700286865} I0424 09:17:17.770482 136699630667584 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0424 09:17:17.770525 136699630667584 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0424 09:17:23.015399 136573198747392 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260424_091312/linen_xpk_feat_nnx_trainstate_and_training_loop_20260424_091312_02_synthetic/checkpoints/9/items/array_metadatas/process_5 I0424 09:18:00.652741 136572682888960 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 36.795 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.929112911224365 s) (per-host) I0424 09:18:00.652861 136572682888960 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.884641s. I0424 09:18:06.867535 136572682888960 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 49.099298s. I0424 09:18:06.867840 136546061608704 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0424 09:18:06.867957 136546061608704 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0424 09:18:06.868006 136546061608704 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0424 09:18:06.869687 136546061608704 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0424 09:18:06.869858 136699630667584 checkpoint_manager.py:2032] [process=5][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9. I0424 09:18:06.870013 136699630667584 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0424 09:18:06.870971 136699630667584 metric_logger.py:196] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.227, Tokens/s/device: 13901.522, 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 09:18:17 UTC 2026 EXIT_CODE=0