main (574ad3fb9) vs feat/nnx-post-train-fixes (574ad3fb9)| Metric | main 574ad3fb9 | feat/nnx-post-train-fixes 574ad3fb9 | Diff (feat/nnx-post-train-fixes − main) |
|---|---|---|---|
| Parameters | 1.104 billion | 1.104 billion | — |
| Final loss | 8.1790 | 8.1790 | 0 |
| TFLOP/s | 92.235 | 92.037 | -0.198 |
| Tok/s | 13902.7 | 13872.8 | -29.853 |
| Avg s/step | 2.719 | 2.797 | +0.078 |
| 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: Mon Apr 20 06:18:32 UTC 2026 PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used. 2026-04-20 06:18:56.286028: 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) I0420 06:18:56.823451 137946811504448 max_utils.py:273] Attempting to initialize the jax distributed system... I0420 06:19:05.865581 137946811504448 distributed.py:149] Starting JAX distributed service on [::]:8482 I0420 06:19:05.867967 137946811504448 distributed.py:172] Connecting to JAX distributed service on mt-07-eval-3ko6e-slice-job-0-0.mt-07-eval-3ko6e:8482 I0420 06:19:07.562508 137946811504448 max_utils.py:284] Jax distributed system initialized! I0420 06:19:13.675007 137946811504448 max_utils.py:800] System Information: Jax Version: 0.9.2 I0420 06:19:13.675110 137946811504448 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0420 06:19:13.675151 137946811504448 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 I0420 06:19:13.675187 137946811504448 train_utils.py:348] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0420 06:19:14.447207 137946811504448 maxtext_utils.py:1551] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0420 06:19:14.447512 137946811504448 checkpointing.py:677] Setting up checkpoint logger... I0420 06:19:14.447568 137946811504448 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True I0420 06:19:14.447615 137946811504448 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0420 06:19:14.447959 137946811504448 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 0x7d75a5d92a20>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0420 06:19:17.579974 137946811504448 checkpointing.py:265] Enabling policy for fixed interval checkpointing. I0420 06:19:17.580208 137946811504448 checkpoint_manager.py:708] [process=2][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d606c5b5af0>}, handler_registry=None I0420 06:19:17.580447 137946811504448 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d606c5b5af0>` 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`. I0420 06:19:17.580512 137946811504448 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d614021ce00>` 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`. I0420 06:19:17.580550 137946811504448 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 0x7d606c5b5af0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d606c5b5af0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d614021ce00>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d614021ce00>}). I0420 06:19:17.580871 137946811504448 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0420 06:19:17.580943 137946811504448 async_checkpointer.py:192] [process=2][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7d604c51b7e0> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0420 06:19:18.296594 137946811504448 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260420_060028/linen_xpk_main_20260420_060028_07_eval/checkpoints I0420 06:19:18.730435 137946811504448 checkpoint_manager.py:929] [process=2][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_20260420_060028/linen_xpk_main_20260420_060028_07_eval/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7d747aae9c40> I0420 06:19:18.730635 137946811504448 checkpointing.py:301] Checkpoint manager created! I0420 06:19:19.652753 137946811504448 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0420 06:19:19.652871 137946811504448 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0420 06:19:20.033174 137946811504448 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0420 06:19:20.033265 137946811504448 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0420 06:19:20.049696 137946811504448 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0420 06:19:20.049757 137946811504448 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0420 06:19:20.073678 137946811504448 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0420 06:19:20.073743 137946811504448 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0420 06:19:20.090249 137946811504448 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0420 06:19:20.090312 137946811504448 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0420 06:19:20.113429 137946811504448 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0420 06:19:20.113535 137946811504448 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0420 06:19:20.139798 137946811504448 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0420 06:19:20.139868 137946811504448 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0420 06:19:20.160865 137946811504448 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0420 06:19:20.160929 137946811504448 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0420 06:19:20.383670 137946811504448 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint I0420 06:19:20.383789 137946811504448 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0420 06:19:21.817003 137946811504448 maxtext_utils.py:1654] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0420 06:19:21.817125 137946811504448 maxtext_utils.py:1654] params/params/decoder/layers/mlp/wi_0/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0420 06:19:21.817180 137946811504448 maxtext_utils.py:1654] params/params/decoder/layers/mlp/wi_1/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0420 06:19:21.817239 137946811504448 maxtext_utils.py:1654] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: P('mlp', 'layers', 'embed') Physical: (None, None, 'fsdp') I0420 06:19:21.817301 137946811504448 maxtext_utils.py:1654] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0420 06:19:21.817342 137946811504448 maxtext_utils.py:1654] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0420 06:19:21.817395 137946811504448 maxtext_utils.py:1654] 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) I0420 06:19:21.817448 137946811504448 maxtext_utils.py:1654] 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') I0420 06:19:21.817506 137946811504448 maxtext_utils.py:1654] 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) I0420 06:19:21.817553 137946811504448 maxtext_utils.py:1654] 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) I0420 06:19:21.817605 137946811504448 maxtext_utils.py:1654] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0420 06:19:21.817655 137946811504448 maxtext_utils.py:1654] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0420 06:19:22.319468 137946811504448 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0420 06:19:22.319574 137946811504448 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0420 06:19:22.334954 137946811504448 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0420 06:19:22.335013 137946811504448 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0420 06:19:33.321103 137946811504448 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. I0420 06:19:33.323501 137946811504448 metric_logger.py:301] number parameters: 1.104 billion I0420 06:19:44.475430 137946811504448 checkpointing.py:772] Waiting for step 0 to finish before checkpoint... I0420 06:19:44.627908 137946811504448 checkpointing.py:776] Waited 0.15245842933654785 seconds for step 0 to finish before starting checkpointing. I0420 06:19:44.630672 137946811504448 checkpoint_manager.py:2009] [process=2][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0420 06:19:44.632270 137946811504448 checkpoint_manager.py:1512] [process=2] Saving checkpoint at step 0 I0420 06:19:44.633678 137946811504448 event_tracking.py:70] [process=2] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260420_060028/linen_xpk_main_20260420_060028_07_eval/checkpoints/0. I0420 06:19:44.979087 137946811504448 signaling_client.py:364] Using JaxDistributedSignalingClient I0420 06:19:44.980053 137946811504448 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0420 06:19:44.980109 137946811504448 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 I0420 06:19:45.256725 137946811504448 base_pytree_checkpoint_handler.py:154] [process=2][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.277714s I0420 06:19:45.256896 137946811504448 base_pytree_checkpoint_handler.py:130] [process=2] /jax/orbax/write/blocking_gbytes_per_sec: 5.442 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2834746837615967 s) (per-host) I0420 06:19:45.256950 137946811504448 base_pytree_checkpoint_handler.py:768] [process=2][thread=MainThread] Initiated Pytree async_save. Time taken: 0.283537s (batch_requests_ready=0.002440s, total_serialization_initiated=0.281027s, others=0.000070s) I0420 06:19:45.257042 137946811504448 composite_checkpoint_handler.py:715] [process=2][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.287465s (all_items=0.000017s, per_item={'items': '0.00001740'}, temp_paths=0.287448) I0420 06:19:45.257860 137946811504448 event_tracking.py:125] [process=2] [async] Finished blocking save in 0.63 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260420_060028/linen_xpk_main_20260420_060028_07_eval/checkpoints/0. I0420 06:19:45.258120 137818383931136 async_checkpointer.py:76] [process=2][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-20 06:39:45.258098 I0420 06:19:45.265630 137946811504448 checkpoint_manager.py:1560] [process=2][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0420 06:19:45.265877 137816239503104 async_checkpointer.py:280] [process=2][thread=save_finalize] Waiting for background save thread=async_save. I0420 06:19:45.265995 137946811504448 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260420_060028/linen_xpk_main_20260420_060028_07_eval/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776665984.630655, 'wait_for_prev_duration_secs': 6.794929504394531e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776665984.6323078, 'checkpointer_blocking_duration_secs': 0.6259200572967529, 'get_old_steps_start_time': 1776665985.2582526, 'get_old_steps_duration_secs': 3.123283386230469e-05, 'checkpoint_manager_blocking_start_time': 1776665984.628316, 'checkpoint_manager_blocking_duration_secs': 0.6376402378082275} I0420 06:19:45.266105 137946811504448 checkpointing.py:408] Started an asynchronous checkpoint save for step 0 I0420 06:19:45.266157 137946811504448 max_utils.py:750] Memstats: After params initialized: I0420 06:19:45.266205 137946811504448 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_8(process=2,(0,2,0,0)) I0420 06:19:45.266237 137946811504448 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_9(process=2,(1,2,0,0)) I0420 06:19:45.266264 137946811504448 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_12(process=2,(0,3,0,0)) I0420 06:19:45.266301 137946811504448 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_13(process=2,(1,3,0,0)) I0420 06:19:45.580301 137946811504448 metric_logger.py:196] completed step: 0, seconds: 11.152, TFLOP/s/device: 1.218, Tokens/s/device: 183.647, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875 I0420 06:19:45.756082 137946811504448 metric_logger.py:196] completed step: 1, seconds: 1.103, TFLOP/s/device: 12.314, Tokens/s/device: 1856.113, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875 I0420 06:19:46.175252 137946811504448 metric_logger.py:196] completed step: 2, seconds: 0.028, TFLOP/s/device: 479.010, Tokens/s/device: 72201.657, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28637.129 I0420 06:19:46.322533 137946811504448 metric_logger.py:196] completed step: 3, seconds: 0.419, TFLOP/s/device: 32.393, Tokens/s/device: 4882.689, total_weights: 65536, loss: 9.734, lm_loss: 9.734, perplexity: 16889.203 I0420 06:19:46.617763 137946811504448 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.699, Tokens/s/device: 13369.630, total_weights: 65536, loss: 9.277, lm_loss: 9.277, perplexity: 10694.614 I0420 06:19:46.623719 137946811504448 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.274, Tokens/s/device: 13908.603, total_weights: 65536, loss: 8.892, lm_loss: 8.892, perplexity: 7270.717 I0420 06:19:48.652718 2833 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0420 06:19:50.881720 137817795004160 array_metadata_store.py:203] [process=2][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260420_060028/linen_xpk_main_20260420_060028_07_eval/checkpoints/0/items/array_metadatas/process_2 I0420 06:20:08.799435 137946811504448 metric_logger.py:196] completed step: 6, seconds: 0.296, TFLOP/s/device: 45.951, Tokens/s/device: 6926.290, total_weights: 65536, loss: 8.592, lm_loss: 8.592, perplexity: 5390.759 I0420 06:20:08.946750 137946811504448 metric_logger.py:196] completed step: 7, seconds: 22.029, TFLOP/s/device: 0.617, Tokens/s/device: 92.970, total_weights: 65536, loss: 8.384, lm_loss: 8.384, perplexity: 4376.905 I0420 06:20:09.094133 137946811504448 metric_logger.py:196] completed step: 8, seconds: 0.153, TFLOP/s/device: 88.968, Tokens/s/device: 13410.250, total_weights: 65536, loss: 8.255, lm_loss: 8.255, perplexity: 3846.406 I0420 06:20:09.240830 137946811504448 checkpointing.py:772] Waiting for step 9 to finish before checkpoint... I0420 06:20:09.241440 137946811504448 checkpointing.py:776] Waited 0.0006325244903564453 seconds for step 9 to finish before starting checkpointing. I0420 06:20:09.243559 137946811504448 checkpoint_manager.py:2020] [process=2][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0420 06:20:21.911314 137818383931136 base_pytree_checkpoint_handler.py:130] [process=2] /jax/orbax/write/gbytes_per_sec: 42.764 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 36.93784976005554 s) (per-host) I0420 06:20:21.911441 137818383931136 async_checkpointer.py:90] [process=2][thread=async_save] 3 Handler Commit operations completed. Time taken: 36.653250s. I0420 06:20:30.847848 137818383931136 async_checkpointer.py:160] [process=2][thread=async_save] Background save thread done. Time taken: 45.589640s. I0420 06:20:30.848080 137816239503104 async_checkpointer.py:288] [process=2][thread=save_finalize] Done with waiting for background save thread=async_save. I0420 06:20:30.848140 137816239503104 async_checkpointer.py:298] [process=2][thread=save_finalize] No errors found in background save thread=async_save. I0420 06:20:30.848196 137816239503104 checkpoint_manager.py:2137] [process=2][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0420 06:20:30.849864 137816239503104 checkpoint_manager.py:2146] [process=2][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0420 06:20:30.850039 137946811504448 checkpoint_manager.py:2032] [process=2][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0. W0420 06:20:30.850180 137946811504448 checkpoint_manager.py:1452] Waiting for previous save to complete took 21.606621 seconds. If this number is high, consider checkpointing less frequently. I0420 06:20:30.852458 137946811504448 checkpoint_manager.py:1512] [process=2] Saving checkpoint at step 9 I0420 06:20:30.854467 137946811504448 event_tracking.py:70] [process=2] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260420_060028/linen_xpk_main_20260420_060028_07_eval/checkpoints/9. I0420 06:20:31.138386 137946811504448 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0420 06:20:31.138489 137946811504448 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 I0420 06:20:31.174917 137946811504448 base_pytree_checkpoint_handler.py:154] [process=2][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.037614s I0420 06:20:31.175105 137946811504448 base_pytree_checkpoint_handler.py:130] [process=2] /jax/orbax/write/blocking_gbytes_per_sec: 37.343 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04130864143371582 s) (per-host) I0420 06:20:31.175180 137946811504448 base_pytree_checkpoint_handler.py:768] [process=2][thread=MainThread] Initiated Pytree async_save. Time taken: 0.041396s (batch_requests_ready=0.001993s, total_serialization_initiated=0.039304s, others=0.000098s) I0420 06:20:31.175290 137946811504448 composite_checkpoint_handler.py:715] [process=2][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.045624s (all_items=0.000015s, per_item={'items': '0.00001478'}, temp_paths=0.045609) I0420 06:20:31.175979 137946811504448 event_tracking.py:125] [process=2] [async] Finished blocking save in 0.32 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260420_060028/linen_xpk_main_20260420_060028_07_eval/checkpoints/9. I0420 06:20:31.176321 137816239503104 async_checkpointer.py:76] [process=2][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-20 06:40:31.176283 I0420 06:20:31.178429 137946811504448 checkpoint_manager.py:1560] [process=2][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0420 06:20:31.178735 137817795004160 async_checkpointer.py:280] [process=2][thread=save_finalize] Waiting for background save thread=async_save. I0420 06:20:31.178896 137946811504448 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260420_060028/linen_xpk_main_20260420_060028_07_eval/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776666009.2435288, 'wait_for_prev_duration_secs': 21.60662078857422, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776666030.8525116, 'checkpointer_blocking_duration_secs': 0.32398462295532227, 'get_old_steps_start_time': 1776666031.17652, 'get_old_steps_duration_secs': 4.1484832763671875e-05, 'checkpoint_manager_blocking_start_time': 1776666009.2416918, 'checkpoint_manager_blocking_duration_secs': 21.93716859817505} I0420 06:20:31.179002 137946811504448 checkpointing.py:408] Started an asynchronous checkpoint save for step 9 I0420 06:20:31.179046 137946811504448 checkpoint_manager.py:2020] [process=2][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0420 06:20:36.770922 137796329129728 array_metadata_store.py:203] [process=2][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260420_060028/linen_xpk_main_20260420_060028_07_eval/checkpoints/9/items/array_metadatas/process_2 I0420 06:21:13.559109 137816239503104 base_pytree_checkpoint_handler.py:130] [process=2] /jax/orbax/write/gbytes_per_sec: 37.232 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.425278425216675 s) (per-host) I0420 06:21:13.559235 137816239503104 async_checkpointer.py:90] [process=2][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.382795s. I0420 06:21:21.503290 137816239503104 async_checkpointer.py:160] [process=2][thread=async_save] Background save thread done. Time taken: 50.326835s. I0420 06:21:21.503593 137817795004160 async_checkpointer.py:288] [process=2][thread=save_finalize] Done with waiting for background save thread=async_save. I0420 06:21:21.503736 137817795004160 async_checkpointer.py:298] [process=2][thread=save_finalize] No errors found in background save thread=async_save. I0420 06:21:21.503787 137817795004160 checkpoint_manager.py:2137] [process=2][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0420 06:21:21.505390 137817795004160 checkpoint_manager.py:2146] [process=2][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0420 06:21:21.505578 137946811504448 checkpoint_manager.py:2032] [process=2][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9. I0420 06:21:21.505729 137946811504448 checkpoint_manager.py:2009] [process=2][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0420 06:21:21.506696 137946811504448 metric_logger.py:196] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.235, Tokens/s/device: 13902.654, 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: Mon Apr 20 06:21:32 UTC 2026 EXIT_CODE=0
XPK Start: Mon Apr 20 16:01:50 UTC 2026 PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used. 2026-04-20 16:02:14.947017: 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) I0420 16:02:15.124485 133292680877888 max_utils.py:273] Attempting to initialize the jax distributed system... I0420 16:02:24.166855 133292680877888 distributed.py:149] Starting JAX distributed service on [::]:8482 I0420 16:02:24.169314 133292680877888 distributed.py:172] Connecting to JAX distributed service on mt-07-eval-sd6r6-slice-job-0-0.mt-07-eval-sd6r6:8482 I0420 16:02:25.079352 133292680877888 max_utils.py:284] Jax distributed system initialized! I0420 16:02:31.296610 133292680877888 max_utils.py:800] System Information: Jax Version: 0.9.2 I0420 16:02:31.296710 133292680877888 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0420 16:02:31.296748 133292680877888 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 I0420 16:02:31.296783 133292680877888 train_utils.py:378] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0420 16:02:31.981173 133292680877888 maxtext_utils.py:1718] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0420 16:02:31.981767 133292680877888 maxtext_utils.py:1718] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0420 16:02:31.981944 133292680877888 checkpointing.py:688] Setting up checkpoint logger... I0420 16:02:31.981993 133292680877888 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0420 16:02:31.982035 133292680877888 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0420 16:02:31.982374 133292680877888 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 0x793a0630a600>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0420 16:02:36.408969 133292680877888 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0420 16:02:36.409220 133292680877888 checkpoint_manager.py:708] [process=0][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7938db6e84d0>}, handler_registry=None I0420 16:02:36.409455 133292680877888 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7938db6e84d0>` 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`. I0420 16:02:36.409503 133292680877888 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7925c80c8500>` 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`. I0420 16:02:36.409539 133292680877888 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 0x7938db6e84d0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7938db6e84d0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7925c80c8500>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7925c80c8500>}). I0420 16:02:36.409861 133292680877888 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0420 16:02:36.409933 133292680877888 async_checkpointer.py:192] [process=0][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x792598113740> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0420 16:02:37.776868 133292680877888 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/linen_xpk_feat_nnx_post_train_fixes_20260420_153543_07_eval/checkpoints I0420 16:02:38.179798 133292680877888 checkpoint_manager.py:929] [process=0][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_20260420_153543/linen_xpk_feat_nnx_post_train_fixes_20260420_153543_07_eval/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7924c8161610> I0420 16:02:38.179965 133292680877888 checkpointing.py:302] Checkpoint manager created! I0420 16:02:39.108124 133292680877888 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0420 16:02:39.108220 133292680877888 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0420 16:02:39.488513 133292680877888 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0420 16:02:39.488604 133292680877888 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0420 16:02:39.504935 133292680877888 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0420 16:02:39.504995 133292680877888 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0420 16:02:39.528384 133292680877888 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0420 16:02:39.528453 133292680877888 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0420 16:02:39.544624 133292680877888 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0420 16:02:39.544684 133292680877888 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0420 16:02:39.560753 133292680877888 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0420 16:02:39.560810 133292680877888 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0420 16:02:39.585397 133292680877888 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0420 16:02:39.585464 133292680877888 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0420 16:02:39.606174 133292680877888 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0420 16:02:39.606232 133292680877888 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0420 16:02:39.822102 133292680877888 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0420 16:02:39.822202 133292680877888 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0420 16:02:41.248255 133292680877888 maxtext_utils.py:1827] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0420 16:02:41.248373 133292680877888 maxtext_utils.py:1827] params/params/decoder/layers/mlp/wi_0/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0420 16:02:41.248426 133292680877888 maxtext_utils.py:1827] params/params/decoder/layers/mlp/wi_1/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0420 16:02:41.248492 133292680877888 maxtext_utils.py:1827] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: P('mlp', 'layers', 'embed') Physical: (None, None, 'fsdp') I0420 16:02:41.248547 133292680877888 maxtext_utils.py:1827] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0420 16:02:41.248585 133292680877888 maxtext_utils.py:1827] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0420 16:02:41.248636 133292680877888 maxtext_utils.py:1827] 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) I0420 16:02:41.248686 133292680877888 maxtext_utils.py:1827] 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') I0420 16:02:41.248726 133292680877888 maxtext_utils.py:1827] 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) I0420 16:02:41.248760 133292680877888 maxtext_utils.py:1827] 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) I0420 16:02:41.248806 133292680877888 maxtext_utils.py:1827] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0420 16:02:41.248853 133292680877888 maxtext_utils.py:1827] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0420 16:02:41.745221 133292680877888 train.py:157] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0420 16:02:41.745315 133292680877888 train.py:157] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0420 16:02:41.760577 133292680877888 train.py:164] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0420 16:02:41.760640 133292680877888 train.py:164] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0420 16:02:52.898319 133292680877888 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. I0420 16:02:52.906212 133292680877888 metric_logger.py:301] number parameters: 1.104 billion I0420 16:03:04.475815 133292680877888 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0420 16:03:04.629204 133292680877888 checkpointing.py:798] Waited 0.15337157249450684 seconds for step 0 to finish before starting checkpointing. I0420 16:03:04.631602 133292680877888 checkpoint_manager.py:2009] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0420 16:03:04.633289 133292680877888 checkpoint_manager.py:1512] [process=0] Saving checkpoint at step 0 I0420 16:03:04.634747 133292680877888 event_tracking.py:70] [process=0] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/linen_xpk_feat_nnx_post_train_fixes_20260420_153543_07_eval/checkpoints/0. I0420 16:03:05.038127 133292680877888 signaling_client.py:364] Using JaxDistributedSignalingClient I0420 16:03:05.052310 133292680877888 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0420 16:03:05.052377 133292680877888 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 I0420 16:03:05.322314 133163552179968 atomicity.py:140] Creating tmp directory gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/linen_xpk_feat_nnx_post_train_fixes_20260420_153543_07_eval/checkpoints/0 I0420 16:03:05.324501 133292680877888 base_pytree_checkpoint_handler.py:154] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.272981s I0420 16:03:05.325404 133292680877888 base_pytree_checkpoint_handler.py:130] [process=0] /jax/orbax/write/blocking_gbytes_per_sec: 5.521 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.27938365936279297 s) (per-host) I0420 16:03:05.325479 133292680877888 base_pytree_checkpoint_handler.py:768] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 0.279479s (batch_requests_ready=0.002209s, total_serialization_initiated=0.276450s, others=0.000820s) I0420 16:03:05.325582 133292680877888 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.283667s (all_items=0.000017s, per_item={'items': '0.00001669'}, temp_paths=0.283650) I0420 16:03:05.326413 133292680877888 event_tracking.py:125] [process=0] [async] Finished blocking save in 0.69 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/linen_xpk_feat_nnx_post_train_fixes_20260420_153543_07_eval/checkpoints/0. I0420 16:03:05.326711 133163560572672 async_checkpointer.py:76] [process=0][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-20 16:23:05.326679 I0420 16:03:05.335343 133292680877888 checkpoint_manager.py:1560] [process=0][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0420 16:03:05.335625 133162457048832 async_checkpointer.py:280] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0420 16:03:05.335781 133292680877888 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/linen_xpk_feat_nnx_post_train_fixes_20260420_153543_07_eval/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776700984.6315827, 'wait_for_prev_duration_secs': 6.0558319091796875e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776700984.6333277, 'checkpointer_blocking_duration_secs': 0.6935257911682129, 'get_old_steps_start_time': 1776700985.3268793, 'get_old_steps_duration_secs': 2.7894973754882812e-05, 'checkpoint_manager_blocking_start_time': 1776700984.629646, 'checkpoint_manager_blocking_duration_secs': 0.7060964107513428} I0420 16:03:05.335887 133292680877888 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0420 16:03:05.335939 133292680877888 max_utils.py:750] Memstats: After params initialized: I0420 16:03:05.335990 133292680877888 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_0(process=0,(0,0,0,0)) I0420 16:03:05.336023 133292680877888 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_1(process=0,(1,0,0,0)) I0420 16:03:05.336051 133292680877888 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_4(process=0,(0,1,0,0)) I0420 16:03:05.336076 133292680877888 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_5(process=0,(1,1,0,0)) I0420 16:03:05.678694 133292680877888 metric_logger.py:196] completed step: 0, seconds: 11.238, TFLOP/s/device: 1.209, Tokens/s/device: 182.233, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875 I0420 16:03:05.681522 133292680877888 metric_logger.py:281] To see full metrics 'tensorboard --logdir=gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/linen_xpk_feat_nnx_post_train_fixes_20260420_153543_07_eval/tensorboard/' I0420 16:03:06.107513 133292680877888 metric_logger.py:196] completed step: 1, seconds: 1.201, TFLOP/s/device: 11.314, Tokens/s/device: 1705.368, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875 I0420 16:03:06.253535 133292680877888 metric_logger.py:196] completed step: 2, seconds: 0.430, TFLOP/s/device: 31.628, Tokens/s/device: 4767.325, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28637.129 I0420 16:03:06.401103 133292680877888 metric_logger.py:196] completed step: 3, seconds: 0.009, TFLOP/s/device: 1453.480, Tokens/s/device: 219084.296, total_weights: 65536, loss: 9.734, lm_loss: 9.734, perplexity: 16889.203 I0420 16:03:07.966447 133163535394560 atomicity.py:140] Creating tmp directory gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/linen_xpk_feat_nnx_post_train_fixes_20260420_153543_07_eval/checkpoints/0/items I0420 16:03:08.083942 133160897607424 checkpoint.py:188] Wrote Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776700987611753994, 'commit_timestamp_nsecs': None, 'custom_metadata': {}}, json={"item_handlers": null, "metrics": {}, "performance_metrics": {}, "init_timestamp_nsecs": 1776700987611753994, "commit_timestamp_nsecs": null, "custom_metadata": {}} to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/linen_xpk_feat_nnx_post_train_fixes_20260420_153543_07_eval/checkpoints/0/_CHECKPOINT_METADATA I0420 16:03:09.324313 2829 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0420 16:03:12.421861 133162508220160 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/linen_xpk_feat_nnx_post_train_fixes_20260420_153543_07_eval/checkpoints/0/items/array_metadatas/process_0 I0420 16:03:29.343910 133292680877888 metric_logger.py:196] completed step: 4, seconds: 0.147, TFLOP/s/device: 92.266, Tokens/s/device: 13907.280, total_weights: 65536, loss: 9.277, lm_loss: 9.277, perplexity: 10694.614 I0420 16:03:29.352586 133292680877888 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.216, Tokens/s/device: 13899.729, total_weights: 65536, loss: 8.892, lm_loss: 8.892, perplexity: 7270.717 I0420 16:03:29.498704 133292680877888 metric_logger.py:196] completed step: 6, seconds: 22.941, TFLOP/s/device: 0.592, Tokens/s/device: 89.271, total_weights: 65536, loss: 8.592, lm_loss: 8.592, perplexity: 5390.759 I0420 16:03:29.646219 133292680877888 metric_logger.py:196] completed step: 7, seconds: 0.006, TFLOP/s/device: 2116.705, Tokens/s/device: 319052.812, total_weights: 65536, loss: 8.384, lm_loss: 8.384, perplexity: 4376.905 I0420 16:03:29.793570 133292680877888 metric_logger.py:196] completed step: 8, seconds: 0.147, TFLOP/s/device: 92.326, Tokens/s/device: 13916.352, total_weights: 65536, loss: 8.255, lm_loss: 8.255, perplexity: 3846.406 I0420 16:03:29.940184 133292680877888 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0420 16:03:29.940778 133292680877888 checkpointing.py:798] Waited 0.0006163120269775391 seconds for step 9 to finish before starting checkpointing. I0420 16:03:29.942922 133292680877888 checkpoint_manager.py:2020] [process=0][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0420 16:03:47.025510 133162465441536 base_pytree_checkpoint_handler.py:1282] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 37.700106s (commit=36.422368s, array_metadata_write=1.277737s) I0420 16:03:47.026665 133163560572672 base_pytree_checkpoint_handler.py:130] [process=0] /jax/orbax/write/gbytes_per_sec: 37.627 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.980602741241455 s) (per-host) I0420 16:03:47.026798 133163560572672 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.699976s. I0420 16:03:47.758700 133163560572672 checkpoint.py:228] Read Metadata={'item_handlers': None, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776700987611753994, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} from gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/linen_xpk_feat_nnx_post_train_fixes_20260420_153543_07_eval/checkpoints/0/_CHECKPOINT_METADATA I0420 16:03:48.494396 133160897607424 checkpoint.py:247] Updated Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776700987611753994, 'commit_timestamp_nsecs': None, 'custom_metadata': {}} to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/linen_xpk_feat_nnx_post_train_fixes_20260420_153543_07_eval/checkpoints/0/_CHECKPOINT_METADATA I0420 16:03:48.499727 133163560572672 array_metadata_store.py:411] [process=0][thread=async_save] Validated ArrayMetadata from all 8 hosts. Time taken: 0.000253s. I0420 16:03:49.282471 133163560572672 ocdbt_utils.py:49] Param validation support for Zarr3 will be added later (b/362328389). I0420 16:03:50.219861 133163560572672 base_pytree_checkpoint_handler.py:1406] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 2.337330s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/linen_xpk_feat_nnx_post_train_fixes_20260420_153543_07_eval/checkpoints/0/items I0420 16:03:50.221668 133163560572672 atomicity.py:666] Finalizing gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/linen_xpk_feat_nnx_post_train_fixes_20260420_153543_07_eval/checkpoints/0/items I0420 16:03:50.785820 133163560572672 atomicity.py:666] Finalizing gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/linen_xpk_feat_nnx_post_train_fixes_20260420_153543_07_eval/checkpoints/0 I0420 16:03:52.213617 133163560572672 atomicity.py:847] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/linen_xpk_feat_nnx_post_train_fixes_20260420_153543_07_eval/checkpoints/0`. I0420 16:03:52.214493 133163560572672 event_tracking.py:138] [process=0] [async] Finished save (blocking + background) in 47.58 seconds @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/linen_xpk_feat_nnx_post_train_fixes_20260420_153543_07_eval/checkpoints/0 I0420 16:03:52.215956 133163560572672 async_checkpointer.py:160] [process=0][thread=async_save] Background save thread done. Time taken: 46.889132s. I0420 16:03:52.216186 133162457048832 async_checkpointer.py:288] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0420 16:03:52.216309 133162457048832 async_checkpointer.py:298] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0420 16:03:52.216378 133162457048832 checkpoint_manager.py:2137] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0420 16:03:52.218167 133162457048832 checkpoint_manager.py:2146] [process=0][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0420 16:03:52.218365 133292680877888 checkpoint_manager.py:2032] [process=0][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0. W0420 16:03:52.218506 133292680877888 checkpoint_manager.py:1452] Waiting for previous save to complete took 22.275584 seconds. If this number is high, consider checkpointing less frequently. I0420 16:03:52.220405 133292680877888 checkpoint_manager.py:1512] [process=0] Saving checkpoint at step 9 I0420 16:03:52.222420 133292680877888 event_tracking.py:70] [process=0] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/linen_xpk_feat_nnx_post_train_fixes_20260420_153543_07_eval/checkpoints/9. I0420 16:03:52.621422 133292680877888 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0420 16:03:52.621514 133292680877888 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 I0420 16:03:52.647955 133292680877888 base_pytree_checkpoint_handler.py:154] [process=0][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.027301s I0420 16:03:52.648765 133292680877888 base_pytree_checkpoint_handler.py:130] [process=0] /jax/orbax/write/blocking_gbytes_per_sec: 48.349 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.03190469741821289 s) (per-host) I0420 16:03:52.648838 133292680877888 base_pytree_checkpoint_handler.py:768] [process=0][thread=MainThread] Initiated Pytree async_save. Time taken: 0.031996s (batch_requests_ready=0.001918s, total_serialization_initiated=0.029363s, others=0.000715s) I0420 16:03:52.648923 133292680877888 composite_checkpoint_handler.py:715] [process=0][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.036132s (all_items=0.000015s, per_item={'items': '0.00001526'}, temp_paths=0.036117) I0420 16:03:52.649667 133292680877888 event_tracking.py:125] [process=0] [async] Finished blocking save in 0.43 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/linen_xpk_feat_nnx_post_train_fixes_20260420_153543_07_eval/checkpoints/9. I0420 16:03:52.649940 133162457048832 async_checkpointer.py:76] [process=0][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-20 16:23:52.649913 I0420 16:03:52.660902 133292680877888 checkpoint_manager.py:1560] [process=0][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0420 16:03:52.661215 133161929385728 async_checkpointer.py:280] [process=0][thread=save_finalize] Waiting for background save thread=async_save. I0420 16:03:52.661384 133292680877888 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/linen_xpk_feat_nnx_post_train_fixes_20260420_153543_07_eval/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776701009.942889, 'wait_for_prev_duration_secs': 22.275583505630493, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776701032.220447, 'checkpointer_blocking_duration_secs': 0.4296140670776367, 'get_old_steps_start_time': 1776701032.6500978, 'get_old_steps_duration_secs': 2.9802322387695312e-05, 'checkpoint_manager_blocking_start_time': 1776701009.9410017, 'checkpoint_manager_blocking_duration_secs': 22.720349073410034} I0420 16:03:52.661497 133292680877888 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0420 16:03:52.661540 133292680877888 checkpoint_manager.py:2020] [process=0][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0420 16:03:52.856370 133163560572672 atomicity.py:140] Creating tmp directory gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/linen_xpk_feat_nnx_post_train_fixes_20260420_153543_07_eval/checkpoints/9 I0420 16:03:54.658339 133163019912960 atomicity.py:140] Creating tmp directory gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/linen_xpk_feat_nnx_post_train_fixes_20260420_153543_07_eval/checkpoints/9/items I0420 16:03:58.025533 133161969104640 array_metadata_store.py:203] [process=0][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/linen_xpk_feat_nnx_post_train_fixes_20260420_153543_07_eval/checkpoints/9/items/array_metadatas/process_0 I0420 16:04:37.342019 133161937778432 base_pytree_checkpoint_handler.py:1282] [process=0][thread=write_metadata_after_commits] Commit + Array metadata written. Time taken: 41.536816s (commit=40.201624s, array_metadata_write=1.335192s) I0420 16:04:37.343230 133162457048832 base_pytree_checkpoint_handler.py:130] [process=0] /jax/orbax/write/gbytes_per_sec: 35.317 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 44.72634172439575 s) (per-host) I0420 16:04:37.343356 133162457048832 async_checkpointer.py:90] [process=0][thread=async_save] 3 Handler Commit operations completed. Time taken: 44.693319s. I0420 16:04:39.549981 133162457048832 array_metadata_store.py:411] [process=0][thread=async_save] Validated ArrayMetadata from all 8 hosts. Time taken: 0.000236s. I0420 16:04:39.688797 133162457048832 ocdbt_utils.py:49] Param validation support for Zarr3 will be added later (b/362328389). I0420 16:04:40.628120 133162457048832 base_pytree_checkpoint_handler.py:1406] [process=0][thread=async_save] Pytree save finalize (merge_ocdbt + ArrayMetadata validation) completed. Time taken: 2.060738s. use_zarr3=True, enable_post_merge_validation=True, directory=gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/linen_xpk_feat_nnx_post_train_fixes_20260420_153543_07_eval/checkpoints/9/items I0420 16:04:40.629848 133162457048832 atomicity.py:666] Finalizing gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/linen_xpk_feat_nnx_post_train_fixes_20260420_153543_07_eval/checkpoints/9/items I0420 16:04:41.586507 133162457048832 atomicity.py:666] Finalizing gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/linen_xpk_feat_nnx_post_train_fixes_20260420_153543_07_eval/checkpoints/9 I0420 16:04:43.912837 133162457048832 atomicity.py:847] [process=0][thread=async_save] Finished saving checkpoint (finalized tmp dir) to `gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/linen_xpk_feat_nnx_post_train_fixes_20260420_153543_07_eval/checkpoints/9`. I0420 16:04:43.913752 133162457048832 event_tracking.py:138] [process=0] [async] Finished save (blocking + background) in 51.69 seconds @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260420_153543/linen_xpk_feat_nnx_post_train_fixes_20260420_153543_07_eval/checkpoints/9 I0420 16:04:43.915269 133162457048832 async_checkpointer.py:160] [process=0][thread=async_save] Background save thread done. Time taken: 51.265229s. I0420 16:04:43.915460 133161929385728 async_checkpointer.py:288] [process=0][thread=save_finalize] Done with waiting for background save thread=async_save. I0420 16:04:43.915667 133161929385728 async_checkpointer.py:298] [process=0][thread=save_finalize] No errors found in background save thread=async_save. I0420 16:04:43.915772 133161929385728 checkpoint_manager.py:2137] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0420 16:04:43.917518 133161929385728 checkpoint_manager.py:2146] [process=0][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0420 16:04:43.917683 133292680877888 checkpoint_manager.py:2032] [process=0][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9. I0420 16:04:43.917831 133292680877888 checkpoint_manager.py:2009] [process=0][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0420 16:04:43.918745 133292680877888 metric_logger.py:196] completed step: 9, seconds: 0.148, TFLOP/s/device: 92.037, Tokens/s/device: 13872.801, 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: Mon Apr 20 16:04:56 UTC 2026 EXIT_CODE=0