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 | 8.1790 | 8.1790 | 0 |
| TFLOP/s | 92.254 | 92.296 | +0.042 |
| Tok/s | 13905.5 | 13911.8 | +6.329 |
| Avg s/step | 2.816 | 2.847 | +0.031 |
| 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 07:54:16 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 07:54:41.052619: 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 07:54:41.263463 134937117493056 max_utils.py:273] Attempting to initialize the jax distributed system... I0423 07:54:50.304568 134937117493056 distributed.py:149] Starting JAX distributed service on [::]:8482 I0423 07:54:50.306813 134937117493056 distributed.py:172] Connecting to JAX distributed service on mt-10-shardy-true-8riju-slice-job-0-0.mt-10-shardy-true-8riju:8482 I0423 07:54:51.681029 134937117493056 max_utils.py:284] Jax distributed system initialized! I0423 07:54:57.945348 134937117493056 max_utils.py:800] System Information: Jax Version: 0.9.2 I0423 07:54:57.945455 134937117493056 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0423 07:54:57.945494 134937117493056 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 07:54:57.945535 134937117493056 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0423 07:54:58.653835 134937117493056 maxtext_utils.py:1604] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0423 07:54:58.654127 134937117493056 checkpointing.py:677] Setting up checkpoint logger... I0423 07:54:58.654183 134937117493056 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True I0423 07:54:58.654227 134937117493056 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0423 07:54:58.654578 134937117493056 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 0x7ab8c7348a40>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0423 07:55:01.802383 134937117493056 checkpointing.py:265] Enabling policy for fixed interval checkpointing. I0423 07:55:01.802626 134937117493056 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 0x7aa47432c3b0>}, handler_registry=None I0423 07:55:01.802865 134937117493056 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7aa47432c3b0>` 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 07:55:01.802912 134937117493056 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7aa474118b90>` 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 07:55:01.802948 134937117493056 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 0x7aa47432c3b0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7aa47432c3b0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7aa474118b90>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7aa474118b90>}). I0423 07:55:01.803274 134937117493056 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0423 07:55:01.803348 134937117493056 async_checkpointer.py:192] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7aa39047da80> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0423 07:55:03.561692 134937117493056 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_10_shardy_true/checkpoints I0423 07:55:03.596245 134937117493056 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_main_20260423_071538/linen_xpk_main_20260423_071538_10_shardy_true/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7aa474118620> I0423 07:55:03.596381 134937117493056 checkpointing.py:301] Checkpoint manager created! I0423 07:55:04.523080 134937117493056 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0423 07:55:04.523214 134937117493056 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 07:55:04.904983 134937117493056 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn'). I0423 07:55:04.905079 134937117493056 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 07:55:04.922027 134937117493056 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn'). I0423 07:55:04.922087 134937117493056 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 07:55:04.946365 134937117493056 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 07:55:04.946434 134937117493056 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 07:55:04.963525 134937117493056 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 07:55:04.963596 134937117493056 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 07:55:04.980572 134937117493056 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 07:55:04.980639 134937117493056 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 07:55:05.006105 134937117493056 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch_attn', 'activation_length_attn', 'activation_heads', 'activation_kv'). I0423 07:55:05.006174 134937117493056 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 07:55:05.027746 134937117493056 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0423 07:55:05.027814 134937117493056 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0423 07:55:05.241860 134937117493056 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint I0423 07:55:05.241975 134937117493056 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0423 07:55:06.671266 134937117493056 maxtext_utils.py:1707] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0423 07:55:06.671398 134937117493056 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, None) I0423 07:55:06.671452 134937117493056 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, None) I0423 07:55:06.671509 134937117493056 maxtext_utils.py:1707] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: P('mlp', 'layers', 'embed') Physical: (None, None, 'fsdp') I0423 07:55:06.671571 134937117493056 maxtext_utils.py:1707] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0423 07:55:06.671612 134937117493056 maxtext_utils.py:1707] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0423 07:55:06.671665 134937117493056 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, None, None) I0423 07:55:06.671716 134937117493056 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: (None, None, None, 'fsdp') I0423 07:55:06.671755 134937117493056 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, None, None) I0423 07:55:06.671792 134937117493056 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, None, None) I0423 07:55:06.671839 134937117493056 maxtext_utils.py:1707] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0423 07:55:06.671887 134937117493056 maxtext_utils.py:1707] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0423 07:55:07.171033 134937117493056 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0423 07:55:07.171148 134937117493056 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0423 07:55:07.187032 134937117493056 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0423 07:55:07.187105 134937117493056 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0423 07:55:18.230356 134937117493056 max_utils.py:791] Total memory size: 1.5 GB, Output size: 0.4 GB, Temp size: 1.1 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB. I0423 07:55:18.231228 134937117493056 metric_logger.py:301] number parameters: 1.104 billion I0423 07:55:30.375482 134937117493056 checkpointing.py:772] Waiting for step 0 to finish before checkpoint... I0423 07:55:30.531723 134937117493056 checkpointing.py:776] Waited 0.1562199592590332 seconds for step 0 to finish before starting checkpointing. I0423 07:55:30.534090 134937117493056 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 07:55:30.535690 134937117493056 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 0 I0423 07:55:30.537041 134937117493056 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_10_shardy_true/checkpoints/0. I0423 07:55:31.296318 134937117493056 signaling_client.py:364] Using JaxDistributedSignalingClient I0423 07:55:31.298907 134937117493056 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0423 07:55:31.298964 134937117493056 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 07:55:31.577702 134937117493056 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.281462s I0423 07:55:31.577886 134937117493056 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.375 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2869696617126465 s) (per-host) I0423 07:55:31.577942 134937117493056 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.287046s (batch_requests_ready=0.002237s, total_serialization_initiated=0.284725s, others=0.000085s) I0423 07:55:31.578048 134937117493056 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.291074s (all_items=0.000018s, per_item={'items': '0.00001836'}, temp_paths=0.291056) I0423 07:55:31.578890 134937117493056 event_tracking.py:125] [process=6] [async] Finished blocking save in 1.04 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_10_shardy_true/checkpoints/0. I0423 07:55:31.579238 134807935178496 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 08:15:31.579198 I0423 07:55:31.587080 134937117493056 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0423 07:55:31.587384 134804162995968 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0423 07:55:31.587539 134937117493056 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_10_shardy_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776930930.5340724, 'wait_for_prev_duration_secs': 7.200241088867188e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776930930.5357287, 'checkpointer_blocking_duration_secs': 1.0436692237854004, 'get_old_steps_start_time': 1776930931.5794241, 'get_old_steps_duration_secs': 3.0994415283203125e-05, 'checkpoint_manager_blocking_start_time': 1776930930.532253, 'checkpoint_manager_blocking_duration_secs': 1.0552465915679932} I0423 07:55:31.587644 134937117493056 checkpointing.py:408] Started an asynchronous checkpoint save for step 0 I0423 07:55:31.587693 134937117493056 max_utils.py:750] Memstats: After params initialized: I0423 07:55:31.587743 134937117493056 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0)) I0423 07:55:31.587776 134937117493056 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0)) I0423 07:55:31.587801 134937117493056 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0)) I0423 07:55:31.587827 134937117493056 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0)) I0423 07:55:31.904980 134937117493056 metric_logger.py:196] completed step: 0, seconds: 12.144, TFLOP/s/device: 1.119, Tokens/s/device: 168.641, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875 I0423 07:55:32.078904 134937117493056 metric_logger.py:196] completed step: 1, seconds: 1.528, TFLOP/s/device: 8.892, Tokens/s/device: 1340.372, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875 I0423 07:55:32.505897 134937117493056 metric_logger.py:196] completed step: 2, seconds: 0.027, TFLOP/s/device: 509.148, Tokens/s/device: 76744.360, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28637.129 I0423 07:55:32.653220 134937117493056 metric_logger.py:196] completed step: 3, seconds: 0.427, TFLOP/s/device: 31.793, Tokens/s/device: 4792.224, total_weights: 65536, loss: 9.734, lm_loss: 9.734, perplexity: 16889.203 I0423 07:55:32.948232 134937117493056 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.886, Tokens/s/device: 13397.880, total_weights: 65536, loss: 9.277, lm_loss: 9.277, perplexity: 10694.614 I0423 07:55:32.953931 134937117493056 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.291, Tokens/s/device: 13911.059, total_weights: 65536, loss: 8.892, lm_loss: 8.892, perplexity: 7270.717 I0423 07:55:36.576321 2858 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0423 07:55:39.120030 134805212292864 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_10_shardy_true/checkpoints/0/items/array_metadatas/process_6 I0423 07:55:55.565791 134937117493056 metric_logger.py:196] completed step: 6, seconds: 0.295, TFLOP/s/device: 45.998, Tokens/s/device: 6933.348, total_weights: 65536, loss: 8.592, lm_loss: 8.592, perplexity: 5390.759 I0423 07:55:55.713122 134937117493056 metric_logger.py:196] completed step: 7, seconds: 22.465, TFLOP/s/device: 0.605, Tokens/s/device: 91.163, total_weights: 65536, loss: 8.384, lm_loss: 8.384, perplexity: 4376.905 I0423 07:55:55.860363 134937117493056 metric_logger.py:196] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.173, Tokens/s/device: 13441.142, total_weights: 65536, loss: 8.255, lm_loss: 8.255, perplexity: 3846.406 I0423 07:55:56.006937 134937117493056 checkpointing.py:772] Waiting for step 9 to finish before checkpoint... I0423 07:55:56.007560 134937117493056 checkpointing.py:776] Waited 0.0006430149078369141 seconds for step 9 to finish before starting checkpointing. I0423 07:55:56.010975 134937117493056 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 07:56:09.831361 134807935178496 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 40.985 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 38.54042100906372 s) (per-host) I0423 07:56:09.831467 134807935178496 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 38.252110s. I0423 07:56:19.445087 134807935178496 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 47.865712s. I0423 07:56:19.445423 134804162995968 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 07:56:19.445561 134804162995968 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0423 07:56:19.445611 134804162995968 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0423 07:56:19.447243 134804162995968 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0423 07:56:19.447414 134937117493056 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 07:56:19.447543 134937117493056 checkpoint_manager.py:1452] Waiting for previous save to complete took 23.436569 seconds. If this number is high, consider checkpointing less frequently. I0423 07:56:19.449466 134937117493056 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 9 I0423 07:56:19.451787 134937117493056 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_10_shardy_true/checkpoints/9. I0423 07:56:20.145057 134937117493056 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0423 07:56:20.145166 134937117493056 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 07:56:20.185118 134937117493056 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.041193s I0423 07:56:20.185293 134937117493056 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 34.490 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04472541809082031 s) (per-host) I0423 07:56:20.185344 134937117493056 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.044787s (batch_requests_ready=0.001826s, total_serialization_initiated=0.042891s, others=0.000070s) I0423 07:56:20.185439 134937117493056 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.048857s (all_items=0.000016s, per_item={'items': '0.00001645'}, temp_paths=0.048840) I0423 07:56:20.186110 134937117493056 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.74 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_10_shardy_true/checkpoints/9. I0423 07:56:20.186463 134804162995968 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 08:16:20.186424 I0423 07:56:20.188544 134937117493056 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0423 07:56:20.188867 134805212292864 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0423 07:56:20.189030 134937117493056 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_10_shardy_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776930956.010944, 'wait_for_prev_duration_secs': 23.436569452285767, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776930979.4495053, 'checkpointer_blocking_duration_secs': 0.7371017932891846, 'get_old_steps_start_time': 1776930980.1866317, 'get_old_steps_duration_secs': 2.8848648071289062e-05, 'checkpoint_manager_blocking_start_time': 1776930956.007788, 'checkpoint_manager_blocking_duration_secs': 24.18120574951172} I0423 07:56:20.189172 134937117493056 checkpointing.py:408] Started an asynchronous checkpoint save for step 9 I0423 07:56:20.189217 134937117493056 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 07:56:26.156921 134786286847744 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_10_shardy_true/checkpoints/9/items/array_metadatas/process_6 I0423 07:57:02.288498 134804162995968 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 37.477 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.147905111312866 s) (per-host) I0423 07:57:02.288614 134804162995968 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.102040s. I0423 07:57:11.166948 134804162995968 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 50.980358s. I0423 07:57:11.167242 134805212292864 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 07:57:11.167365 134805212292864 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0423 07:57:11.167413 134805212292864 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0423 07:57:11.169355 134805212292864 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0423 07:57:11.169580 134937117493056 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 07:57:11.169735 134937117493056 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 07:57:11.170693 134937117493056 metric_logger.py:196] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.254, Tokens/s/device: 13905.486, 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: Thu Apr 23 07:57:21 UTC 2026 EXIT_CODE=0
XPK Start: Thu Apr 23 13:19:22 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. 2026-04-23 13:19:47.574216: 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 13:19:47.783144 133486912243520 max_utils.py:273] Attempting to initialize the jax distributed system... I0423 13:19:56.823776 133486912243520 distributed.py:149] Starting JAX distributed service on [::]:8482 I0423 13:19:56.826057 133486912243520 distributed.py:172] Connecting to JAX distributed service on mt-10-shardy-true-fzpad-slice-job-0-0.mt-10-shardy-true-fzpad:8482 I0423 13:19:58.047644 133486912243520 max_utils.py:284] Jax distributed system initialized! I0423 13:20:04.400679 133486912243520 max_utils.py:800] System Information: Jax Version: 0.9.2 I0423 13:20:04.400782 133486912243520 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0423 13:20:04.400824 133486912243520 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 13:20:04.400860 133486912243520 train_utils.py:391] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0423 13:20:05.098310 133486912243520 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0423 13:20:05.098910 133486912243520 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0423 13:20:05.099095 133486912243520 checkpointing.py:688] Setting up checkpoint logger... I0423 13:20:05.099144 133486912243520 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0423 13:20:05.099193 133486912243520 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0423 13:20:05.099526 133486912243520 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 0x796739f18e00>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0423 13:20:08.086976 133486912243520 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0423 13:20:08.087296 133486912243520 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 0x7952c01fa480>}, handler_registry=None I0423 13:20:08.087575 133486912243520 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7952c01fa480>` 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 13:20:08.087641 133486912243520 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7952c01fc4d0>` 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 13:20:08.087703 133486912243520 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 0x7952c01fa480>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7952c01fa480>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7952c01fc4d0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7952c01fc4d0>}). I0423 13:20:08.088120 133486912243520 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0423 13:20:08.088212 133486912243520 async_checkpointer.py:192] [process=5][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7952a85cdd00> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0423 13:20:08.998698 133486912243520 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_10_shardy_true/checkpoints I0423 13:20:09.001278 133486912243520 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_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_10_shardy_true/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7952c01fbbc0> I0423 13:20:09.001390 133486912243520 checkpointing.py:302] Checkpoint manager created! I0423 13:20:09.942849 133486912243520 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0423 13:20:09.942959 133486912243520 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 13:20:10.326596 133486912243520 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 13:20:10.326702 133486912243520 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 13:20:10.343191 133486912243520 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0423 13:20:10.343253 133486912243520 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0423 13:20:10.367173 133486912243520 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 13:20:10.367240 133486912243520 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 13:20:10.383882 133486912243520 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 13:20:10.383952 133486912243520 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 13:20:10.400403 133486912243520 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0423 13:20:10.400467 133486912243520 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 13:20:10.425318 133486912243520 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0423 13:20:10.425389 133486912243520 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0423 13:20:10.446322 133486912243520 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0423 13:20:10.446386 133486912243520 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0423 13:20:10.665229 133486912243520 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0423 13:20:10.665341 133486912243520 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0423 13:20:12.086530 133486912243520 maxtext_utils.py:1880] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0423 13:20:12.086676 133486912243520 maxtext_utils.py:1880] params/params/decoder/layers/mlp/wi_0/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0423 13:20:12.086732 133486912243520 maxtext_utils.py:1880] params/params/decoder/layers/mlp/wi_1/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0423 13:20:12.086789 133486912243520 maxtext_utils.py:1880] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: P('mlp', 'layers', 'embed') Physical: (None, None, 'fsdp') I0423 13:20:12.086844 133486912243520 maxtext_utils.py:1880] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0423 13:20:12.086883 133486912243520 maxtext_utils.py:1880] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0423 13:20:12.086935 133486912243520 maxtext_utils.py:1880] params/params/decoder/layers/self_attention/key/kernel Shape: float32[2048,16,16,128] Logical: P('embed', 'layers', 'kv_heads', 'kv_head_dim') Physical: ('fsdp', None, None, None) I0423 13:20:12.086986 133486912243520 maxtext_utils.py:1880] params/params/decoder/layers/self_attention/out/kernel Shape: float32[16,16,128,2048] Logical: P('heads', 'layers', 'kv', 'embed') Physical: (None, None, None, 'fsdp') I0423 13:20:12.087025 133486912243520 maxtext_utils.py:1880] params/params/decoder/layers/self_attention/query/kernel Shape: float32[2048,16,16,128] Logical: P('embed', 'layers', 'q_heads', 'kv') Physical: ('fsdp', None, None, None) I0423 13:20:12.087061 133486912243520 maxtext_utils.py:1880] params/params/decoder/layers/self_attention/value/kernel Shape: float32[2048,16,16,128] Logical: P('embed', 'layers', 'kv_heads', 'kv_head_dim') Physical: ('fsdp', None, None, None) I0423 13:20:12.087107 133486912243520 maxtext_utils.py:1880] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0423 13:20:12.087157 133486912243520 maxtext_utils.py:1880] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0423 13:20:12.584182 133486912243520 train.py:157] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0423 13:20:12.584284 133486912243520 train.py:157] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0423 13:20:12.599879 133486912243520 train.py:164] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0423 13:20:12.599941 133486912243520 train.py:164] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0423 13:20:23.223404 133486912243520 max_utils.py:791] Total memory size: 1.5 GB, Output size: 0.4 GB, Temp size: 1.1 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB. I0423 13:20:23.224229 133486912243520 metric_logger.py:301] number parameters: 1.104 billion I0423 13:20:34.536439 133486912243520 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0423 13:20:34.870174 133486912243520 checkpointing.py:798] Waited 0.33371472358703613 seconds for step 0 to finish before starting checkpointing. I0423 13:20:34.872552 133486912243520 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 13:20:34.874280 133486912243520 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 0 I0423 13:20:34.875646 133486912243520 event_tracking.py:70] [process=5] [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_10_shardy_true/checkpoints/0. I0423 13:20:35.473123 133486912243520 signaling_client.py:364] Using JaxDistributedSignalingClient I0423 13:20:35.474045 133486912243520 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0423 13:20:35.474102 133486912243520 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 13:20:35.744595 133486912243520 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.271545s I0423 13:20:35.744767 133486912243520 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 5.564 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2772207260131836 s) (per-host) I0423 13:20:35.744820 133486912243520 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.277283s (batch_requests_ready=0.002309s, total_serialization_initiated=0.274904s, others=0.000070s) I0423 13:20:35.744919 133486912243520 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.281307s (all_items=0.000019s, per_item={'items': '0.00001907'}, temp_paths=0.281288) I0423 13:20:35.745762 133486912243520 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.87 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_10_shardy_true/checkpoints/0. I0423 13:20:35.746045 133356855490304 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 13:40:35.746021 I0423 13:20:35.757353 133486912243520 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0423 13:20:35.757645 133355728336640 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0423 13:20:35.757810 133486912243520 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_10_shardy_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776950434.8725343, 'wait_for_prev_duration_secs': 6.0558319091796875e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776950434.8743196, 'checkpointer_blocking_duration_secs': 0.871842622756958, 'get_old_steps_start_time': 1776950435.7461898, 'get_old_steps_duration_secs': 3.170967102050781e-05, 'checkpoint_manager_blocking_start_time': 1776950434.8706896, 'checkpoint_manager_blocking_duration_secs': 0.8870818614959717} I0423 13:20:35.757916 133486912243520 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0423 13:20:35.757971 133486912243520 max_utils.py:750] Memstats: After params initialized: I0423 13:20:35.758023 133486912243520 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_18(process=5,(2,4,0,0)) I0423 13:20:35.758056 133486912243520 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_19(process=5,(3,4,0,0)) I0423 13:20:35.758086 133486912243520 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_22(process=5,(2,5,0,0)) I0423 13:20:35.758112 133486912243520 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_23(process=5,(3,5,0,0)) I0423 13:20:36.082101 133486912243520 metric_logger.py:196] completed step: 0, seconds: 11.312, TFLOP/s/device: 1.201, Tokens/s/device: 181.045, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875 I0423 13:20:36.320842 133486912243520 metric_logger.py:196] completed step: 1, seconds: 1.544, TFLOP/s/device: 8.799, Tokens/s/device: 1326.291, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875 I0423 13:20:36.754012 133486912243520 metric_logger.py:196] completed step: 2, seconds: 0.092, TFLOP/s/device: 148.072, Tokens/s/device: 22319.093, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28637.129 I0423 13:20:36.901304 133486912243520 metric_logger.py:196] completed step: 3, seconds: 0.433, TFLOP/s/device: 31.351, Tokens/s/device: 4725.601, total_weights: 65536, loss: 9.734, lm_loss: 9.734, perplexity: 16889.203 I0423 13:20:37.196410 133486912243520 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 89.018, Tokens/s/device: 13417.718, total_weights: 65536, loss: 9.277, lm_loss: 9.277, perplexity: 10694.614 I0423 13:20:37.202299 133486912243520 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.174, Tokens/s/device: 13893.411, total_weights: 65536, loss: 8.892, lm_loss: 8.892, perplexity: 7270.717 I0423 13:20:43.908290 2841 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0423 13:20:46.370068 133355781748480 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_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_10_shardy_true/checkpoints/0/items/array_metadatas/process_5 I0423 13:21:00.006281 133486912243520 metric_logger.py:196] completed step: 6, seconds: 0.296, TFLOP/s/device: 45.977, Tokens/s/device: 6930.180, total_weights: 65536, loss: 8.592, lm_loss: 8.592, perplexity: 5390.759 I0423 13:21:00.153665 133486912243520 metric_logger.py:196] completed step: 7, seconds: 22.657, TFLOP/s/device: 0.600, Tokens/s/device: 90.391, total_weights: 65536, loss: 8.384, lm_loss: 8.384, perplexity: 4376.905 I0423 13:21:00.301027 133486912243520 metric_logger.py:196] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.162, Tokens/s/device: 13439.467, total_weights: 65536, loss: 8.255, lm_loss: 8.255, perplexity: 3846.406 I0423 13:21:00.447596 133486912243520 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0423 13:21:00.448192 133486912243520 checkpointing.py:798] Waited 0.0006167888641357422 seconds for step 9 to finish before starting checkpointing. I0423 13:21:00.450447 133486912243520 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 13:21:17.916468 133356855490304 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 37.212 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.44888496398926 s) (per-host) I0423 13:21:17.916584 133356855490304 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.170461s. I0423 13:21:26.679438 133356855490304 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 50.933299s. I0423 13:21:26.679771 133355728336640 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 13:21:26.679887 133355728336640 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0423 13:21:26.679936 133355728336640 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0423 13:21:26.681353 133355728336640 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0423 13:21:26.681585 133486912243520 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 13:21:26.681739 133486912243520 checkpoint_manager.py:1452] Waiting for previous save to complete took 26.231293 seconds. If this number is high, consider checkpointing less frequently. I0423 13:21:26.684755 133486912243520 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 9 I0423 13:21:26.686873 133486912243520 event_tracking.py:70] [process=5] [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_10_shardy_true/checkpoints/9. I0423 13:21:27.340831 133486912243520 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0423 13:21:27.340935 133486912243520 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 13:21:27.380081 133486912243520 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.040396s I0423 13:21:27.380269 133486912243520 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 35.104 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04394340515136719 s) (per-host) I0423 13:21:27.380334 133486912243520 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.044015s (batch_requests_ready=0.001885s, total_serialization_initiated=0.042048s, others=0.000082s) I0423 13:21:27.380453 133486912243520 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.048186s (all_items=0.000016s, per_item={'items': '0.00001597'}, temp_paths=0.048170) I0423 13:21:27.381222 133486912243520 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.70 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_10_shardy_true/checkpoints/9. I0423 13:21:27.381571 133355728336640 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 13:41:27.381530 I0423 13:21:27.383531 133486912243520 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0423 13:21:27.383771 133356830312192 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0423 13:21:27.383895 133486912243520 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_10_shardy_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776950460.4504168, 'wait_for_prev_duration_secs': 26.231292963027954, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776950486.6847944, 'checkpointer_blocking_duration_secs': 0.6968884468078613, 'get_old_steps_start_time': 1776950487.3817067, 'get_old_steps_duration_secs': 3.0279159545898438e-05, 'checkpoint_manager_blocking_start_time': 1776950460.4484181, 'checkpoint_manager_blocking_duration_secs': 26.93544101715088} I0423 13:21:27.384011 133486912243520 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0423 13:21:27.384056 133486912243520 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0423 13:21:32.399774 133356838704896 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_post_train_fixes_20260423_124541/linen_xpk_feat_nnx_post_train_fixes_20260423_124541_10_shardy_true/checkpoints/9/items/array_metadatas/process_5 I0423 13:22:09.815509 133355728336640 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 37.185 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.4791419506073 s) (per-host) I0423 13:22:09.815635 133355728336640 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.433420s. I0423 13:22:17.353422 133355728336640 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 49.971193s. I0423 13:22:17.353750 133356830312192 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0423 13:22:17.353870 133356830312192 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0423 13:22:17.353920 133356830312192 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0423 13:22:17.355409 133356830312192 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0423 13:22:17.355565 133486912243520 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 13:22:17.355724 133486912243520 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0423 13:22:17.356714 133486912243520 metric_logger.py:196] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.296, Tokens/s/device: 13911.815, 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: Thu Apr 23 13:22:28 UTC 2026 EXIT_CODE=0