main (586e69205) vs feat/nnx-post-train-fixes (7f06c99ac)| Metric | main 586e69205 | feat/nnx-post-train-fixes 7f06c99ac | Diff (feat/nnx-post-train-fixes − main) |
|---|---|---|---|
| Parameters | 1.104 billion | 1.104 billion | — |
| Final loss | 5.8920 | 5.8920 | 0 |
| TFLOP/s | 58.583 | 58.304 | -0.279 |
| Tok/s | 8830.3 | 8788.2 | -42.136 |
| Avg s/step | 3.388 | 3.325 | -0.063 |
| Memory % | 1.38 | 1.38 | 0 |
| JAX | 0.9.2 | 0.9.2 | — |
Diff = branch value − main value. Green = branch improved. Red = branch regressed.
XPK Start: Thu Apr 23 07:51:18 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 07:51:43.005064: 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 07:51:43.213678 136787013527360 max_utils.py:273] Attempting to initialize the jax distributed system... I0423 07:51:52.254612 136787013527360 distributed.py:149] Starting JAX distributed service on [::]:8482 I0423 07:51:52.256982 136787013527360 distributed.py:172] Connecting to JAX distributed service on mt-09-pdb-lt-1-0a2q8-slice-job-0-0.mt-09-pdb-lt-1-0a2q8:8482 I0423 07:51:53.743714 136787013527360 max_utils.py:284] Jax distributed system initialized! I0423 07:51:59.756491 136787013527360 max_utils.py:800] System Information: Jax Version: 0.9.2 I0423 07:51:59.756598 136787013527360 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0423 07:51:59.756638 136787013527360 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 07:51:59.756693 136787013527360 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0423 07:52:00.450295 136787013527360 maxtext_utils.py:1604] Num_devices: 32, shape (1, 1, 1, 8, 1, 1, 1, 1, 4, 1, 1, 1, 1) I0423 07:52:00.450573 136787013527360 checkpointing.py:677] Setting up checkpoint logger... I0423 07:52:00.450627 136787013527360 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True I0423 07:52:00.450685 136787013527360 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0423 07:52:00.451025 136787013527360 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 0x7c67a5d14c50>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0423 07:52:04.194893 136787013527360 checkpointing.py:265] Enabling policy for fixed interval checkpointing. I0423 07:52:04.195144 136787013527360 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 0x7c536873be00>}, handler_registry=None I0423 07:52:04.195375 136787013527360 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7c536873be00>` 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 07:52:04.195422 136787013527360 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7c53687de150>` 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 07:52:04.195457 136787013527360 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 0x7c536873be00>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7c536873be00>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7c53687de150>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7c53687de150>}). I0423 07:52:04.195797 136787013527360 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0423 07:52:04.195863 136787013527360 async_checkpointer.py:192] [process=5][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7c5348711b20> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0423 07:52:04.867532 136787013527360 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_09_pdb_lt_1/checkpoints I0423 07:52:05.307007 136787013527360 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_main_20260423_071538/linen_xpk_main_20260423_071538_09_pdb_lt_1/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7c53687d0b60> I0423 07:52:05.307175 136787013527360 checkpointing.py:301] Checkpoint manager created! I0423 07:52:06.226885 136787013527360 nnx_wrappers.py:437] Unknown Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0423 07:52:06.227006 136787013527360 nnx_wrappers.py:437] Unknown Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, 'tensor'). I0423 07:52:06.605701 136787013527360 attentions.py:1088] attentions/inputs_q Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 07:52:06.605797 136787013527360 attentions.py:1088] attentions/inputs_q Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, 'tensor'). I0423 07:52:06.622286 136787013527360 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 07:52:06.622347 136787013527360 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, 'tensor'). I0423 07:52:06.646183 136787013527360 attentions.py:1154] attentions/query Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 07:52:06.646249 136787013527360 attentions.py:1154] attentions/query Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, 'tensor', None). I0423 07:52:06.662853 136787013527360 attentions.py:1155] attentions/key Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 07:52:06.662913 136787013527360 attentions.py:1155] attentions/key Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, 'tensor', None). I0423 07:52:06.679329 136787013527360 attentions.py:1156] attentions/value Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 07:52:06.679393 136787013527360 attentions.py:1156] attentions/value Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, 'tensor', None). I0423 07:52:06.704201 136787013527360 attentions.py:1198] attentions/out Logical: bfloat16[8,2048,16,128]..................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0423 07:52:06.704272 136787013527360 attentions.py:1198] attentions/out Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, 'tensor', None). I0423 07:52:06.725508 136787013527360 linears.py:525] linears/x Logical: bfloat16[8,2048,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0423 07:52:06.725571 136787013527360 linears.py:525] linears/x Physical: bfloat16[8,2048,7168]....................................... ('fsdp', None, 'tensor'). I0423 07:52:06.938464 136787013527360 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint I0423 07:52:06.938576 136787013527360 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint. fsdp: 8 tensor: 4 I0423 07:52:08.387416 136787013527360 maxtext_utils.py:1707] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: ('tensor',) I0423 07:52:08.387551 136787013527360 maxtext_utils.py:1707] params/params/decoder/layers/mlp/wi_0/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, 'tensor') I0423 07:52:08.387605 136787013527360 maxtext_utils.py:1707] params/params/decoder/layers/mlp/wi_1/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, 'tensor') I0423 07:52:08.387679 136787013527360 maxtext_utils.py:1707] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: P('mlp', 'layers', 'embed') Physical: ('tensor', None, 'fsdp') I0423 07:52:08.387888 136787013527360 maxtext_utils.py:1707] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: ('tensor', None) I0423 07:52:08.388079 136787013527360 maxtext_utils.py:1707] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: ('tensor', None) I0423 07:52:08.388183 136787013527360 maxtext_utils.py:1707] 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, 'tensor', None) I0423 07:52:08.388278 136787013527360 maxtext_utils.py:1707] params/params/decoder/layers/self_attention/out/kernel Shape: float32[16,16,128,2048] Logical: P('heads', 'layers', 'kv', 'embed') Physical: ('tensor', None, None, 'fsdp') I0423 07:52:08.388332 136787013527360 maxtext_utils.py:1707] params/params/decoder/layers/self_attention/query/kernel Shape: float32[2048,16,16,128] Logical: P('embed', 'layers', 'q_heads', 'kv') Physical: ('fsdp', None, 'tensor', None) I0423 07:52:08.388374 136787013527360 maxtext_utils.py:1707] 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, 'tensor', None) I0423 07:52:08.388431 136787013527360 maxtext_utils.py:1707] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', 'tensor') I0423 07:52:08.388492 136787013527360 maxtext_utils.py:1707] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: ('tensor', 'fsdp') I0423 07:52:08.887515 136787013527360 train.py:155] train/xent Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length'). I0423 07:52:08.887612 136787013527360 train.py:155] train/xent Physical: float32[8,2048]............................................. ('fsdp', None). I0423 07:52:08.903216 136787013527360 train.py:162] train/z_loss Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length'). I0423 07:52:08.903279 136787013527360 train.py:162] train/z_loss Physical: float32[8,2048]............................................. ('fsdp', None). I0423 07:52:23.998539 136787013527360 max_utils.py:791] Total memory size: 0.9 GB, Output size: 0.4 GB, Temp size: 0.5 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB. I0423 07:52:23.999321 136787013527360 metric_logger.py:301] number parameters: 1.104 billion I0423 07:52:25.573770 136787013527360 checkpointing.py:772] Waiting for step 0 to finish before checkpoint... I0423 07:52:39.849961 136787013527360 checkpointing.py:776] Waited 14.276163816452026 seconds for step 0 to finish before starting checkpointing. I0423 07:52:39.852271 136787013527360 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 07:52:39.854264 136787013527360 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 0 I0423 07:52:39.855633 136787013527360 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_09_pdb_lt_1/checkpoints/0. I0423 07:52:40.560122 136787013527360 signaling_client.py:364] Using JaxDistributedSignalingClient I0423 07:52:40.561012 136787013527360 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0423 07:52:40.561071 136787013527360 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 07:52:40.826185 136787013527360 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.266137s I0423 07:52:40.826353 136787013527360 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 5.676 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.271775484085083 s) (per-host) I0423 07:52:40.826403 136787013527360 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.271835s (batch_requests_ready=0.002371s, total_serialization_initiated=0.269397s, others=0.000067s) I0423 07:52:40.826494 136787013527360 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.275970s (all_items=0.000018s, per_item={'items': '0.00001836'}, temp_paths=0.275952) I0423 07:52:40.827323 136787013527360 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.97 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_09_pdb_lt_1/checkpoints/0. I0423 07:52:40.827604 136659282687744 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 08:12:40.827573 I0423 07:52:40.829890 136787013527360 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0423 07:52:40.830193 136659257509632 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0423 07:52:40.830355 136787013527360 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_09_pdb_lt_1/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776930759.852253, 'wait_for_prev_duration_secs': 6.079673767089844e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776930759.8543026, 'checkpointer_blocking_duration_secs': 0.9734597206115723, 'get_old_steps_start_time': 1776930760.8277884, 'get_old_steps_duration_secs': 2.9325485229492188e-05, 'checkpoint_manager_blocking_start_time': 1776930759.8504884, 'checkpoint_manager_blocking_duration_secs': 0.9798288345336914} I0423 07:52:40.830461 136787013527360 checkpointing.py:408] Started an asynchronous checkpoint save for step 0 I0423 07:52:40.830513 136787013527360 max_utils.py:750] Memstats: After params initialized: I0423 07:52:40.830562 136787013527360 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_18(process=5,(2,4,0,0)) I0423 07:52:40.830595 136787013527360 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_19(process=5,(3,4,0,0)) I0423 07:52:40.830624 136787013527360 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_22(process=5,(2,5,0,0)) I0423 07:52:40.830664 136787013527360 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_23(process=5,(3,5,0,0)) I0423 07:52:41.140145 136787013527360 metric_logger.py:196] completed step: 0, seconds: 1.574, TFLOP/s/device: 2.158, Tokens/s/device: 325.215, total_weights: 16384, loss: 10.862, lm_loss: 10.862, perplexity: 52153.723 I0423 07:52:41.230454 136787013527360 metric_logger.py:196] completed step: 1, seconds: 15.565, TFLOP/s/device: 0.218, Tokens/s/device: 32.895, total_weights: 16384, loss: 10.862, lm_loss: 10.862, perplexity: 52153.723 I0423 07:52:41.633573 136787013527360 metric_logger.py:196] completed step: 2, seconds: 0.032, TFLOP/s/device: 106.316, Tokens/s/device: 16025.039, total_weights: 16384, loss: 9.763, lm_loss: 9.763, perplexity: 17373.129 I0423 07:52:41.691857 136787013527360 metric_logger.py:196] completed step: 3, seconds: 0.403, TFLOP/s/device: 8.424, Tokens/s/device: 1269.725, total_weights: 16384, loss: 8.823, lm_loss: 8.823, perplexity: 6791.817 I0423 07:52:41.808950 136787013527360 metric_logger.py:196] completed step: 4, seconds: 0.064, TFLOP/s/device: 52.958, Tokens/s/device: 7982.414, total_weights: 16384, loss: 7.947, lm_loss: 7.947, perplexity: 2828.417 I0423 07:52:41.814574 136787013527360 metric_logger.py:196] completed step: 5, seconds: 0.058, TFLOP/s/device: 58.343, Tokens/s/device: 8794.078, total_weights: 16384, loss: 7.212, lm_loss: 7.212, perplexity: 1355.339 I0423 07:52:43.710017 2509 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0423 07:52:46.161417 136659265902336 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_09_pdb_lt_1/checkpoints/0/items/array_metadatas/process_5 I0423 07:52:56.001365 136787013527360 metric_logger.py:196] completed step: 6, seconds: 0.117, TFLOP/s/device: 28.919, Tokens/s/device: 4358.968, total_weights: 16384, loss: 6.652, lm_loss: 6.652, perplexity: 774.659 I0423 07:52:56.059696 136787013527360 metric_logger.py:196] completed step: 7, seconds: 14.129, TFLOP/s/device: 0.240, Tokens/s/device: 36.238, total_weights: 16384, loss: 6.269, lm_loss: 6.269, perplexity: 527.696 I0423 07:52:56.118057 136787013527360 metric_logger.py:196] completed step: 8, seconds: 0.063, TFLOP/s/device: 53.643, Tokens/s/device: 8085.657, total_weights: 16384, loss: 6.031, lm_loss: 6.031, perplexity: 416.165 I0423 07:52:56.175677 136787013527360 checkpointing.py:772] Waiting for step 9 to finish before checkpoint... I0423 07:52:56.176280 136787013527360 checkpointing.py:776] Waited 0.0006439685821533203 seconds for step 9 to finish before starting checkpointing. I0423 07:52:56.179532 136787013527360 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 07:53:17.574971 136659282687744 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 42.668 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 37.020325899124146 s) (per-host) I0423 07:53:17.575100 136659282687744 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 36.747373s. I0423 07:53:25.154350 136659282687744 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 44.326607s. I0423 07:53:25.154620 136659257509632 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 07:53:25.154762 136659257509632 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0423 07:53:25.154824 136659257509632 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0423 07:53:25.156922 136659257509632 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0423 07:53:25.157098 136787013527360 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. W0423 07:53:25.157229 136787013527360 checkpoint_manager.py:1452] Waiting for previous save to complete took 28.977697 seconds. If this number is high, consider checkpointing less frequently. I0423 07:53:25.159279 136787013527360 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 9 I0423 07:53:25.161582 136787013527360 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_09_pdb_lt_1/checkpoints/9. I0423 07:53:25.871907 136787013527360 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0423 07:53:25.872003 136787013527360 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 07:53:25.897622 136787013527360 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.026779s I0423 07:53:25.897802 136787013527360 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 50.696 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.030428171157836914 s) (per-host) I0423 07:53:25.897853 136787013527360 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.030489s (batch_requests_ready=0.001933s, total_serialization_initiated=0.028488s, others=0.000069s) I0423 07:53:25.897949 136787013527360 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.035417s (all_items=0.000015s, per_item={'items': '0.00001526'}, temp_paths=0.035402) I0423 07:53:25.898604 136787013527360 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.74 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_09_pdb_lt_1/checkpoints/9. I0423 07:53:25.898871 136659257509632 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 08:13:25.898847 I0423 07:53:25.902461 136787013527360 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0423 07:53:25.902764 136658745816832 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0423 07:53:25.902925 136787013527360 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_09_pdb_lt_1/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776930776.1795013, 'wait_for_prev_duration_secs': 28.977696657180786, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776930805.1593187, 'checkpointer_blocking_duration_secs': 0.7396523952484131, 'get_old_steps_start_time': 1776930805.8989968, 'get_old_steps_duration_secs': 2.9325485229492188e-05, 'checkpoint_manager_blocking_start_time': 1776930776.176499, 'checkpoint_manager_blocking_duration_secs': 29.726391315460205} I0423 07:53:25.903038 136787013527360 checkpointing.py:408] Started an asynchronous checkpoint save for step 9 I0423 07:53:25.903084 136787013527360 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 07:53:31.402973 136664735258368 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_09_pdb_lt_1/checkpoints/9/items/array_metadatas/process_5 I0423 07:54:08.024563 136659257509632 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 37.469 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.157129526138306 s) (per-host) I0423 07:54:08.024700 136659257509632 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.125750s. I0423 07:54:15.125515 136659257509632 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 49.226550s. I0423 07:54:15.125868 136658745816832 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 07:54:15.126015 136658745816832 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0423 07:54:15.126063 136658745816832 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0423 07:54:15.127613 136658745816832 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0423 07:54:15.127801 136787013527360 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. I0423 07:54:15.127975 136787013527360 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 07:54:15.128954 136787013527360 metric_logger.py:196] completed step: 9, seconds: 0.058, TFLOP/s/device: 58.583, Tokens/s/device: 8830.327, total_weights: 16384, loss: 5.892, lm_loss: 5.892, perplexity: 361.955 Per train step: Total TFLOPs: 3.40 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Thu Apr 23 07:54:23 UTC 2026 EXIT_CODE=0
XPK Start: Thu Apr 23 13:16:24 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 13:16:49.603266: 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 13:16:49.813758 136944106862400 max_utils.py:273] Attempting to initialize the jax distributed system... I0423 13:16:58.854962 136944106862400 distributed.py:149] Starting JAX distributed service on [::]:8482 I0423 13:16:58.857548 136944106862400 distributed.py:172] Connecting to JAX distributed service on mt-09-pdb-lt-1-9wm8c-slice-job-0-0.mt-09-pdb-lt-1-9wm8c:8482 I0423 13:16:59.881524 136944106862400 max_utils.py:284] Jax distributed system initialized! I0423 13:17:05.092915 136944106862400 max_utils.py:800] System Information: Jax Version: 0.9.2 I0423 13:17:05.093022 136944106862400 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0423 13:17:05.093064 136944106862400 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 13:17:05.093124 136944106862400 train_utils.py:391] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0423 13:17:05.789554 136944106862400 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 8, 1, 1, 1, 1, 4, 1, 1, 1, 1) I0423 13:17:05.790151 136944106862400 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 8, 1, 1, 1, 1, 4, 1, 1, 1, 1) I0423 13:17:05.790331 136944106862400 checkpointing.py:688] Setting up checkpoint logger... I0423 13:17:05.790379 136944106862400 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0423 13:17:05.790421 136944106862400 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0423 13:17:05.790760 136944106862400 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 0x7c8c2fd1ca10>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0423 13:17:08.737227 136944106862400 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0423 13:17:08.737576 136944106862400 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 0x7c785c2aaa20>}, handler_registry=None I0423 13:17:08.737811 136944106862400 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7c785c2aaa20>` 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 13:17:08.737859 136944106862400 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7c785c2ae870>` 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 13:17:08.737895 136944106862400 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 0x7c785c2aaa20>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7c785c2aaa20>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7c785c2ae870>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7c785c2ae870>}). I0423 13:17:08.738224 136944106862400 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0423 13:17:08.738294 136944106862400 async_checkpointer.py:192] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7c7834379e40> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0423 13:17:09.846663 136944106862400 checkpoint_manager.py:1812] Found 0 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_09_pdb_lt_1/checkpoints I0423 13:17:10.297254 136944106862400 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_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_09_pdb_lt_1/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7c785c209490> I0423 13:17:10.297430 136944106862400 checkpointing.py:302] Checkpoint manager created! I0423 13:17:11.239597 136944106862400 nnx_wrappers.py:437] Unknown Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0423 13:17:11.239707 136944106862400 nnx_wrappers.py:437] Unknown Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, 'tensor'). I0423 13:17:11.623358 136944106862400 attentions.py:1088] attentions/inputs_q Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 13:17:11.623460 136944106862400 attentions.py:1088] attentions/inputs_q Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, 'tensor'). I0423 13:17:11.640079 136944106862400 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 13:17:11.640153 136944106862400 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, 'tensor'). I0423 13:17:11.663998 136944106862400 attentions.py:1154] attentions/query Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 13:17:11.664065 136944106862400 attentions.py:1154] attentions/query Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, 'tensor', None). I0423 13:17:11.680850 136944106862400 attentions.py:1155] attentions/key Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 13:17:11.680914 136944106862400 attentions.py:1155] attentions/key Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, 'tensor', None). I0423 13:17:11.697358 136944106862400 attentions.py:1156] attentions/value Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 13:17:11.697417 136944106862400 attentions.py:1156] attentions/value Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, 'tensor', None). I0423 13:17:11.722303 136944106862400 attentions.py:1198] attentions/out Logical: bfloat16[8,2048,16,128]..................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0423 13:17:11.722374 136944106862400 attentions.py:1198] attentions/out Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, 'tensor', None). I0423 13:17:11.743352 136944106862400 linears.py:525] linears/x Logical: bfloat16[8,2048,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0423 13:17:11.743416 136944106862400 linears.py:525] linears/x Physical: bfloat16[8,2048,7168]....................................... ('fsdp', None, 'tensor'). I0423 13:17:11.961409 136944106862400 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0423 13:17:11.961522 136944106862400 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 8 tensor: 4 I0423 13:17:13.423034 136944106862400 maxtext_utils.py:1880] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: ('tensor',) I0423 13:17:13.423180 136944106862400 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, 'tensor') I0423 13:17:13.423235 136944106862400 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, 'tensor') I0423 13:17:13.423293 136944106862400 maxtext_utils.py:1880] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: P('mlp', 'layers', 'embed') Physical: ('tensor', None, 'fsdp') I0423 13:17:13.423352 136944106862400 maxtext_utils.py:1880] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: ('tensor', None) I0423 13:17:13.423393 136944106862400 maxtext_utils.py:1880] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: ('tensor', None) I0423 13:17:13.423445 136944106862400 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, 'tensor', None) I0423 13:17:13.423497 136944106862400 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: ('tensor', None, None, 'fsdp') I0423 13:17:13.423538 136944106862400 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, 'tensor', None) I0423 13:17:13.423576 136944106862400 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, 'tensor', None) I0423 13:17:13.423630 136944106862400 maxtext_utils.py:1880] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', 'tensor') I0423 13:17:13.423680 136944106862400 maxtext_utils.py:1880] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: ('tensor', 'fsdp') I0423 13:17:13.920151 136944106862400 train.py:157] train/xent Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length'). I0423 13:17:13.920248 136944106862400 train.py:157] train/xent Physical: float32[8,2048]............................................. ('fsdp', None). I0423 13:17:13.935946 136944106862400 train.py:164] train/z_loss Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length'). I0423 13:17:13.936008 136944106862400 train.py:164] train/z_loss Physical: float32[8,2048]............................................. ('fsdp', None). I0423 13:17:29.092810 136944106862400 max_utils.py:791] Total memory size: 0.9 GB, Output size: 0.4 GB, Temp size: 0.5 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB. I0423 13:17:29.093681 136944106862400 metric_logger.py:301] number parameters: 1.104 billion I0423 13:17:30.273683 136944106862400 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0423 13:17:44.689982 136944106862400 checkpointing.py:798] Waited 14.416275024414062 seconds for step 0 to finish before starting checkpointing. I0423 13:17:44.692560 136944106862400 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 13:17:44.694456 136944106862400 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 0 I0423 13:17:44.696312 136944106862400 event_tracking.py:70] [process=6] [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_09_pdb_lt_1/checkpoints/0. I0423 13:17:45.046754 136944106862400 signaling_client.py:364] Using JaxDistributedSignalingClient I0423 13:17:45.047704 136944106862400 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0423 13:17:45.047762 136944106862400 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 13:17:45.313636 136944106862400 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.266956s I0423 13:17:45.313804 136944106862400 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.655 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.27276062965393066 s) (per-host) I0423 13:17:45.313856 136944106862400 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.272822s (batch_requests_ready=0.002628s, total_serialization_initiated=0.270125s, others=0.000069s) I0423 13:17:45.313951 136944106862400 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.276997s (all_items=0.000019s, per_item={'items': '0.00001884'}, temp_paths=0.276978) I0423 13:17:45.314698 136944106862400 event_tracking.py:125] [process=6] [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_09_pdb_lt_1/checkpoints/0. I0423 13:17:45.315028 136815377905408 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 13:37:45.314991 I0423 13:17:45.332577 136944106862400 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0423 13:17:45.332896 136815352727296 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0423 13:17:45.333053 136944106862400 standard_logger.py:34] {'step': 0, '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_09_pdb_lt_1/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776950264.692534, 'wait_for_prev_duration_secs': 6.937980651855469e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776950264.6944945, 'checkpointer_blocking_duration_secs': 0.6206414699554443, 'get_old_steps_start_time': 1776950265.3151605, 'get_old_steps_duration_secs': 2.9325485229492188e-05, 'checkpoint_manager_blocking_start_time': 1776950264.6905103, 'checkpoint_manager_blocking_duration_secs': 0.6425034999847412} I0423 13:17:45.333180 136944106862400 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0423 13:17:45.333232 136944106862400 max_utils.py:750] Memstats: After params initialized: I0423 13:17:45.333284 136944106862400 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0)) I0423 13:17:45.333317 136944106862400 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0)) I0423 13:17:45.333346 136944106862400 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0)) I0423 13:17:45.333373 136944106862400 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0)) I0423 13:17:45.646382 136944106862400 metric_logger.py:196] completed step: 0, seconds: 1.180, TFLOP/s/device: 2.879, Tokens/s/device: 433.939, total_weights: 16384, loss: 10.862, lm_loss: 10.862, perplexity: 52153.723 I0423 13:17:45.728282 136944106862400 metric_logger.py:196] completed step: 1, seconds: 15.371, TFLOP/s/device: 0.221, Tokens/s/device: 33.309, total_weights: 16384, loss: 10.862, lm_loss: 10.862, perplexity: 52153.723 I0423 13:17:46.151551 136944106862400 metric_logger.py:196] completed step: 2, seconds: 0.024, TFLOP/s/device: 142.788, Tokens/s/device: 21522.552, total_weights: 16384, loss: 9.763, lm_loss: 9.763, perplexity: 17373.129 I0423 13:17:46.209937 136944106862400 metric_logger.py:196] completed step: 3, seconds: 0.424, TFLOP/s/device: 8.016, Tokens/s/device: 1208.331, total_weights: 16384, loss: 8.823, lm_loss: 8.823, perplexity: 6791.817 I0423 13:17:46.327198 136944106862400 metric_logger.py:196] completed step: 4, seconds: 0.064, TFLOP/s/device: 53.472, Tokens/s/device: 8059.946, total_weights: 16384, loss: 7.947, lm_loss: 7.947, perplexity: 2828.417 I0423 13:17:46.332909 136944106862400 metric_logger.py:196] completed step: 5, seconds: 0.058, TFLOP/s/device: 58.436, Tokens/s/device: 8808.148, total_weights: 16384, loss: 7.212, lm_loss: 7.212, perplexity: 1355.339 I0423 13:17:48.298772 2561 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0423 13:17:50.531395 136815361120000 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_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_09_pdb_lt_1/checkpoints/0/items/array_metadatas/process_6 I0423 13:18:00.137253 136944106862400 metric_logger.py:196] completed step: 6, seconds: 0.118, TFLOP/s/device: 28.815, Tokens/s/device: 4343.253, total_weights: 16384, loss: 6.652, lm_loss: 6.652, perplexity: 774.659 I0423 13:18:00.195644 136944106862400 metric_logger.py:196] completed step: 7, seconds: 13.747, TFLOP/s/device: 0.247, Tokens/s/device: 37.246, total_weights: 16384, loss: 6.269, lm_loss: 6.269, perplexity: 527.696 I0423 13:18:00.253910 136944106862400 metric_logger.py:196] completed step: 8, seconds: 0.063, TFLOP/s/device: 53.741, Tokens/s/device: 8100.497, total_weights: 16384, loss: 6.031, lm_loss: 6.031, perplexity: 416.165 I0423 13:18:00.311539 136944106862400 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0423 13:18:00.312170 136944106862400 checkpointing.py:798] Waited 0.0006482601165771484 seconds for step 9 to finish before starting checkpointing. I0423 13:18:00.315514 136944106862400 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 13:18:22.074018 136815377905408 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 42.654 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 37.03295612335205 s) (per-host) I0423 13:18:22.074142 136815377905408 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 36.758482s. I0423 13:18:30.039960 136815377905408 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 44.724280s. I0423 13:18:30.040272 136815352727296 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 13:18:30.040404 136815352727296 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0423 13:18:30.040458 136815352727296 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0423 13:18:30.042121 136815352727296 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0423 13:18:30.042387 136944106862400 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. W0423 13:18:30.042523 136944106862400 checkpoint_manager.py:1452] Waiting for previous save to complete took 29.727013 seconds. If this number is high, consider checkpointing less frequently. I0423 13:18:30.044348 136944106862400 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 9 I0423 13:18:30.046289 136944106862400 event_tracking.py:70] [process=6] [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_09_pdb_lt_1/checkpoints/9. I0423 13:18:30.437015 136944106862400 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0423 13:18:30.437130 136944106862400 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 13:18:30.462897 136944106862400 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.026798s I0423 13:18:30.463041 136944106862400 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 50.748 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.03039693832397461 s) (per-host) I0423 13:18:30.463090 136944106862400 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.030456s (batch_requests_ready=0.001903s, total_serialization_initiated=0.028487s, others=0.000066s) I0423 13:18:30.463184 136944106862400 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.035244s (all_items=0.000018s, per_item={'items': '0.00001764'}, temp_paths=0.035226) I0423 13:18:30.463916 136944106862400 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.42 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_09_pdb_lt_1/checkpoints/9. I0423 13:18:30.464254 136815352727296 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 13:38:30.464217 I0423 13:18:30.467593 136944106862400 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0423 13:18:30.467860 136819664480000 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0423 13:18:30.468026 136944106862400 standard_logger.py:34] {'step': 9, '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_09_pdb_lt_1/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776950280.3154771, 'wait_for_prev_duration_secs': 29.727013111114502, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776950310.0443883, 'checkpointer_blocking_duration_secs': 0.4200112819671631, 'get_old_steps_start_time': 1776950310.4644232, 'get_old_steps_duration_secs': 3.218650817871094e-05, 'checkpoint_manager_blocking_start_time': 1776950280.3123944, 'checkpoint_manager_blocking_duration_secs': 30.15559482574463} I0423 13:18:30.468156 136944106862400 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0423 13:18:30.468201 136944106862400 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 13:18:35.583987 136809447147264 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_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_09_pdb_lt_1/checkpoints/9/items/array_metadatas/process_6 I0423 13:19:11.638867 136815352727296 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 38.334 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.206180810928345 s) (per-host) I0423 13:19:11.638995 136815352727296 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.174625s. I0423 13:19:20.300075 136815352727296 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 49.835688s. I0423 13:19:20.300368 136819664480000 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 13:19:20.300497 136819664480000 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0423 13:19:20.300545 136819664480000 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0423 13:19:20.302867 136819664480000 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0423 13:19:20.303036 136944106862400 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. I0423 13:19:20.303204 136944106862400 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 13:19:20.304152 136944106862400 metric_logger.py:196] completed step: 9, seconds: 0.058, TFLOP/s/device: 58.304, Tokens/s/device: 8788.191, total_weights: 16384, loss: 5.892, lm_loss: 5.892, perplexity: 361.955 Per train step: Total TFLOPs: 3.40 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Thu Apr 23 13:19:29 UTC 2026 EXIT_CODE=0