main (8a17c3d19) vs feat/nnx-post-train-fixes (7f06c99ac)| Metric | main 8a17c3d19 | 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 | 92.282 | 92.259 | -0.023 |
| Tok/s | 13909.7 | 13906.2 | -3.494 |
| Avg s/step | 2.745 | 2.777 | +0.032 |
| 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: Wed Apr 22 07:52:27 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. 2026-04-22 07:52:52.680124: 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) I0422 07:52:52.891762 138272577578816 max_utils.py:273] Attempting to initialize the jax distributed system... I0422 07:53:01.935559 138272577578816 distributed.py:149] Starting JAX distributed service on [::]:8482 I0422 07:53:01.938032 138272577578816 distributed.py:172] Connecting to JAX distributed service on mt-11-optimizer-offload-6hsa4-slice-job-0-0.mt-11-optimizer-offload-6hsa4:8482 I0422 07:53:03.732848 138272577578816 max_utils.py:284] Jax distributed system initialized! I0422 07:53:08.889832 138272577578816 max_utils.py:800] System Information: Jax Version: 0.9.2 I0422 07:53:08.889937 138272577578816 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0422 07:53:08.889977 138272577578816 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 I0422 07:53:08.890011 138272577578816 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0422 07:53:09.585953 138272577578816 maxtext_utils.py:1565] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0422 07:53:09.586241 138272577578816 checkpointing.py:677] Setting up checkpoint logger... I0422 07:53:09.586299 138272577578816 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True I0422 07:53:09.586344 138272577578816 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0422 07:53:09.586700 138272577578816 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 0x7dc179fe7680>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0422 07:53:12.416175 138272577578816 checkpointing.py:265] Enabling policy for fixed interval checkpointing. I0422 07:53:12.416415 138272577578816 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 0x7dade41d9d30>}, handler_registry=None I0422 07:53:12.416665 138272577578816 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7dade41d9d30>` 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`. I0422 07:53:12.416727 138272577578816 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7dade41dd880>` 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`. I0422 07:53:12.416766 138272577578816 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 0x7dade41d9d30>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7dade41d9d30>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7dade41dd880>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7dade41dd880>}). I0422 07:53:12.417097 138272577578816 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0422 07:53:12.417165 138272577578816 async_checkpointer.py:192] [process=2][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7dadb46e9440> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0422 07:53:13.201467 138272577578816 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260422_071422/linen_xpk_main_20260422_071422_11_optimizer_offload_false/checkpoints I0422 07:53:13.227210 138272577578816 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_20260422_071422/linen_xpk_main_20260422_071422_11_optimizer_offload_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7dade41da4b0> I0422 07:53:13.227347 138272577578816 checkpointing.py:301] Checkpoint manager created! I0422 07:53:14.147528 138272577578816 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0422 07:53:14.147648 138272577578816 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0422 07:53:14.535388 138272577578816 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0422 07:53:14.535484 138272577578816 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0422 07:53:14.551950 138272577578816 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0422 07:53:14.552015 138272577578816 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0422 07:53:14.575846 138272577578816 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0422 07:53:14.575913 138272577578816 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0422 07:53:14.592558 138272577578816 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0422 07:53:14.592618 138272577578816 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0422 07:53:14.609143 138272577578816 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0422 07:53:14.609205 138272577578816 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0422 07:53:14.634343 138272577578816 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0422 07:53:14.634418 138272577578816 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0422 07:53:14.655630 138272577578816 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0422 07:53:14.655697 138272577578816 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0422 07:53:14.869659 138272577578816 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint I0422 07:53:14.869790 138272577578816 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0422 07:53:16.316678 138272577578816 maxtext_utils.py:1668] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0422 07:53:16.316821 138272577578816 maxtext_utils.py:1668] params/params/decoder/layers/mlp/wi_0/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0422 07:53:16.316875 138272577578816 maxtext_utils.py:1668] params/params/decoder/layers/mlp/wi_1/kernel Shape: float32[2048,16,7168] Logical: P('embed', 'layers', 'mlp') Physical: ('fsdp', None, None) I0422 07:53:16.316939 138272577578816 maxtext_utils.py:1668] params/params/decoder/layers/mlp/wo/kernel Shape: float32[7168,16,2048] Logical: P('mlp', 'layers', 'embed') Physical: (None, None, 'fsdp') I0422 07:53:16.316995 138272577578816 maxtext_utils.py:1668] params/params/decoder/layers/post_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0422 07:53:16.317034 138272577578816 maxtext_utils.py:1668] params/params/decoder/layers/pre_self_attention_layer_norm/scale Shape: float32[2048,16] Logical: P('norm', 'layers') Physical: (None, None) I0422 07:53:16.317087 138272577578816 maxtext_utils.py:1668] 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) I0422 07:53:16.317139 138272577578816 maxtext_utils.py:1668] 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') I0422 07:53:16.317180 138272577578816 maxtext_utils.py:1668] 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) I0422 07:53:16.317216 138272577578816 maxtext_utils.py:1668] 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) I0422 07:53:16.317263 138272577578816 maxtext_utils.py:1668] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0422 07:53:16.317311 138272577578816 maxtext_utils.py:1668] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0422 07:53:16.819324 138272577578816 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0422 07:53:16.819423 138272577578816 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0422 07:53:16.835054 138272577578816 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0422 07:53:16.835117 138272577578816 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0422 07:53:27.906997 138272577578816 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. I0422 07:53:27.907801 138272577578816 metric_logger.py:301] number parameters: 1.104 billion I0422 07:53:39.679344 138272577578816 checkpointing.py:772] Waiting for step 0 to finish before checkpoint... I0422 07:53:39.832394 138272577578816 checkpointing.py:776] Waited 0.15303492546081543 seconds for step 0 to finish before starting checkpointing. I0422 07:53:39.834942 138272577578816 checkpoint_manager.py:2009] [process=2][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0422 07:53:39.836760 138272577578816 checkpoint_manager.py:1512] [process=2] Saving checkpoint at step 0 I0422 07:53:39.838347 138272577578816 event_tracking.py:70] [process=2] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260422_071422/linen_xpk_main_20260422_071422_11_optimizer_offload_false/checkpoints/0. I0422 07:53:40.568942 138272577578816 signaling_client.py:364] Using JaxDistributedSignalingClient I0422 07:53:40.569882 138272577578816 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0422 07:53:40.569941 138272577578816 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 I0422 07:53:40.852207 138272577578816 base_pytree_checkpoint_handler.py:154] [process=2][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.283340s I0422 07:53:40.852382 138272577578816 base_pytree_checkpoint_handler.py:130] [process=2] /jax/orbax/write/blocking_gbytes_per_sec: 5.336 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2890758514404297 s) (per-host) I0422 07:53:40.852436 138272577578816 base_pytree_checkpoint_handler.py:768] [process=2][thread=MainThread] Initiated Pytree async_save. Time taken: 0.289140s (batch_requests_ready=0.002398s, total_serialization_initiated=0.286669s, others=0.000073s) I0422 07:53:40.852538 138272577578816 composite_checkpoint_handler.py:715] [process=2][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.293185s (all_items=0.000019s, per_item={'items': '0.00001884'}, temp_paths=0.293166) I0422 07:53:40.853371 138272577578816 event_tracking.py:125] [process=2] [async] Finished blocking save in 1.02 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260422_071422/linen_xpk_main_20260422_071422_11_optimizer_offload_false/checkpoints/0. I0422 07:53:40.853699 138146324334336 async_checkpointer.py:76] [process=2][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-22 08:13:40.853661 I0422 07:53:40.855660 138272577578816 checkpoint_manager.py:1560] [process=2][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0422 07:53:40.855961 138145244899072 async_checkpointer.py:280] [process=2][thread=save_finalize] Waiting for background save thread=async_save. I0422 07:53:40.856118 138272577578816 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260422_071422/linen_xpk_main_20260422_071422_11_optimizer_offload_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776844419.8349245, 'wait_for_prev_duration_secs': 6.318092346191406e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776844419.836798, 'checkpointer_blocking_duration_secs': 1.0170648097991943, 'get_old_steps_start_time': 1776844420.853886, 'get_old_steps_duration_secs': 3.337860107421875e-05, 'checkpoint_manager_blocking_start_time': 1776844419.8328857, 'checkpoint_manager_blocking_duration_secs': 1.023195505142212} I0422 07:53:40.856222 138272577578816 checkpointing.py:408] Started an asynchronous checkpoint save for step 0 I0422 07:53:40.856277 138272577578816 max_utils.py:750] Memstats: After params initialized: I0422 07:53:40.856324 138272577578816 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_8(process=2,(0,2,0,0)) I0422 07:53:40.856356 138272577578816 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_9(process=2,(1,2,0,0)) I0422 07:53:40.856383 138272577578816 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_12(process=2,(0,3,0,0)) I0422 07:53:40.856409 138272577578816 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_13(process=2,(1,3,0,0)) I0422 07:53:41.187255 138272577578816 metric_logger.py:196] completed step: 0, seconds: 11.771, TFLOP/s/device: 1.154, Tokens/s/device: 173.981, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875 I0422 07:53:41.346943 138272577578816 metric_logger.py:196] completed step: 1, seconds: 1.506, TFLOP/s/device: 9.019, Tokens/s/device: 1359.495, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875 I0422 07:53:41.775915 138272577578816 metric_logger.py:196] completed step: 2, seconds: 0.012, TFLOP/s/device: 1094.853, Tokens/s/device: 165028.203, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28637.129 I0422 07:53:41.923183 138272577578816 metric_logger.py:196] completed step: 3, seconds: 0.429, TFLOP/s/device: 31.650, Tokens/s/device: 4770.646, total_weights: 65536, loss: 9.734, lm_loss: 9.734, perplexity: 16889.203 I0422 07:53:42.217951 138272577578816 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.866, Tokens/s/device: 13394.813, total_weights: 65536, loss: 9.277, lm_loss: 9.277, perplexity: 10694.614 I0422 07:53:42.223763 138272577578816 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.304, Tokens/s/device: 13913.043, total_weights: 65536, loss: 8.892, lm_loss: 8.892, perplexity: 7270.717 I0422 07:53:44.108445 2730 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0422 07:53:46.169079 138146296325888 array_metadata_store.py:203] [process=2][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260422_071422/linen_xpk_main_20260422_071422_11_optimizer_offload_false/checkpoints/0/items/array_metadatas/process_2 I0422 07:54:04.238450 138272577578816 metric_logger.py:196] completed step: 6, seconds: 0.295, TFLOP/s/device: 46.027, Tokens/s/device: 6937.740, total_weights: 65536, loss: 8.592, lm_loss: 8.592, perplexity: 5390.759 I0422 07:54:04.385786 138272577578816 metric_logger.py:196] completed step: 7, seconds: 21.868, TFLOP/s/device: 0.621, Tokens/s/device: 93.653, total_weights: 65536, loss: 8.384, lm_loss: 8.384, perplexity: 4376.905 I0422 07:54:04.533074 138272577578816 metric_logger.py:196] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.167, Tokens/s/device: 13440.172, total_weights: 65536, loss: 8.255, lm_loss: 8.255, perplexity: 3846.406 I0422 07:54:04.679812 138272577578816 checkpointing.py:772] Waiting for step 9 to finish before checkpoint... I0422 07:54:04.680451 138272577578816 checkpointing.py:776] Waited 0.0006597042083740234 seconds for step 9 to finish before starting checkpointing. I0422 07:54:04.682404 138272577578816 checkpoint_manager.py:2020] [process=2][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0422 07:54:18.410327 138146324334336 base_pytree_checkpoint_handler.py:130] [process=2] /jax/orbax/write/gbytes_per_sec: 41.736 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 37.84698247909546 s) (per-host) I0422 07:54:18.410449 138146324334336 async_checkpointer.py:90] [process=2][thread=async_save] 3 Handler Commit operations completed. Time taken: 37.556624s. I0422 07:54:27.603103 138146324334336 async_checkpointer.py:160] [process=2][thread=async_save] Background save thread done. Time taken: 46.749262s. I0422 07:54:27.603390 138145244899072 async_checkpointer.py:288] [process=2][thread=save_finalize] Done with waiting for background save thread=async_save. I0422 07:54:27.603514 138145244899072 async_checkpointer.py:298] [process=2][thread=save_finalize] No errors found in background save thread=async_save. I0422 07:54:27.603579 138145244899072 checkpoint_manager.py:2137] [process=2][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0422 07:54:27.605643 138145244899072 checkpoint_manager.py:2146] [process=2][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0422 07:54:27.605858 138272577578816 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. W0422 07:54:27.606017 138272577578816 checkpoint_manager.py:1452] Waiting for previous save to complete took 22.923604 seconds. If this number is high, consider checkpointing less frequently. I0422 07:54:27.607906 138272577578816 checkpoint_manager.py:1512] [process=2] Saving checkpoint at step 9 I0422 07:54:27.609938 138272577578816 event_tracking.py:70] [process=2] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260422_071422/linen_xpk_main_20260422_071422_11_optimizer_offload_false/checkpoints/9. I0422 07:54:27.903514 138272577578816 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0422 07:54:27.903605 138272577578816 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 I0422 07:54:27.944075 138272577578816 base_pytree_checkpoint_handler.py:154] [process=2][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.041621s I0422 07:54:27.944244 138272577578816 base_pytree_checkpoint_handler.py:130] [process=2] /jax/orbax/write/blocking_gbytes_per_sec: 34.085 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.045256614685058594 s) (per-host) I0422 07:54:27.944301 138272577578816 base_pytree_checkpoint_handler.py:768] [process=2][thread=MainThread] Initiated Pytree async_save. Time taken: 0.045324s (batch_requests_ready=0.001954s, total_serialization_initiated=0.043296s, others=0.000073s) I0422 07:54:27.944398 138272577578816 composite_checkpoint_handler.py:715] [process=2][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.049564s (all_items=0.000016s, per_item={'items': '0.00001574'}, temp_paths=0.049548) I0422 07:54:27.945116 138272577578816 event_tracking.py:125] [process=2] [async] Finished blocking save in 0.34 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260422_071422/linen_xpk_main_20260422_071422_11_optimizer_offload_false/checkpoints/9. I0422 07:54:27.945426 138145244899072 async_checkpointer.py:76] [process=2][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-22 08:14:27.945387 I0422 07:54:27.947298 138272577578816 checkpoint_manager.py:1560] [process=2][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0422 07:54:27.947521 138119303132928 async_checkpointer.py:280] [process=2][thread=save_finalize] Waiting for background save thread=async_save. I0422 07:54:27.947626 138272577578816 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260422_071422/linen_xpk_main_20260422_071422_11_optimizer_offload_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776844444.6823728, 'wait_for_prev_duration_secs': 22.923604011535645, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776844467.6079452, 'checkpointer_blocking_duration_secs': 0.33762431144714355, 'get_old_steps_start_time': 1776844467.9455914, 'get_old_steps_duration_secs': 3.337860107421875e-05, 'checkpoint_manager_blocking_start_time': 1776844444.6806843, 'checkpoint_manager_blocking_duration_secs': 23.266910076141357} I0422 07:54:27.947803 138272577578816 checkpointing.py:408] Started an asynchronous checkpoint save for step 9 I0422 07:54:27.947848 138272577578816 checkpoint_manager.py:2020] [process=2][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0422 07:54:33.467936 138146296325888 array_metadata_store.py:203] [process=2][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260422_071422/linen_xpk_main_20260422_071422_11_optimizer_offload_false/checkpoints/9/items/array_metadatas/process_2 I0422 07:55:10.931235 138145244899072 base_pytree_checkpoint_handler.py:130] [process=2] /jax/orbax/write/gbytes_per_sec: 36.707 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 43.03221559524536 s) (per-host) I0422 07:55:10.931346 138145244899072 async_checkpointer.py:90] [process=2][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.985807s. I0422 07:55:19.227466 138145244899072 async_checkpointer.py:160] [process=2][thread=async_save] Background save thread done. Time taken: 51.281910s. I0422 07:55:19.227699 138119303132928 async_checkpointer.py:288] [process=2][thread=save_finalize] Done with waiting for background save thread=async_save. I0422 07:55:19.227805 138119303132928 async_checkpointer.py:298] [process=2][thread=save_finalize] No errors found in background save thread=async_save. I0422 07:55:19.227856 138119303132928 checkpoint_manager.py:2137] [process=2][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0422 07:55:19.229488 138119303132928 checkpoint_manager.py:2146] [process=2][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0422 07:55:19.229651 138272577578816 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. I0422 07:55:19.229817 138272577578816 checkpoint_manager.py:2009] [process=2][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0422 07:55:19.230808 138272577578816 metric_logger.py:196] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.282, Tokens/s/device: 13909.736, 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: Wed Apr 22 07:55:27 UTC 2026 EXIT_CODE=0
XPK Start: Wed Apr 22 13:19:18 UTC 2026 PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used. `rope_parameters`'s factor field must be a float >= 1, got 40 `rope_parameters`'s beta_fast field must be a float, got 32 `rope_parameters`'s beta_slow field must be a float, got 1 DeepseekV32Config got `key=rope_scaling` in kwargs but hasn't set it as attribute. For RoPE standardization you need to set `self.rope_parameters` in model's config. 2026-04-22 13:19:43.317567: 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) I0422 13:19:43.527778 134186252744512 max_utils.py:273] Attempting to initialize the jax distributed system... I0422 13:19:52.566768 134186252744512 distributed.py:149] Starting JAX distributed service on [::]:8482 I0422 13:19:52.569038 134186252744512 distributed.py:172] Connecting to JAX distributed service on mt-11-optimizer-offload-21zpa-slice-job-0-0.mt-11-optimizer-offload-21zpa:8482 I0422 13:19:54.046856 134186252744512 max_utils.py:284] Jax distributed system initialized! I0422 13:20:00.387405 134186252744512 max_utils.py:800] System Information: Jax Version: 0.9.2 I0422 13:20:00.387509 134186252744512 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0422 13:20:00.387548 134186252744512 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 I0422 13:20:00.387582 134186252744512 train_utils.py:391] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0422 13:20:01.075269 134186252744512 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0422 13:20:01.075870 134186252744512 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0422 13:20:01.076052 134186252744512 checkpointing.py:688] Setting up checkpoint logger... I0422 13:20:01.076103 134186252744512 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0422 13:20:01.076146 134186252744512 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0422 13:20:01.076474 134186252744512 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 0x7a09f434cd10>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0422 13:20:04.023147 134186252744512 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0422 13:20:04.023460 134186252744512 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 0x79f5ec7dff50>}, handler_registry=None I0422 13:20:04.023714 134186252744512 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x79f5ec7dff50>` 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`. I0422 13:20:04.023764 134186252744512 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x79f5ec681d00>` 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`. I0422 13:20:04.023800 134186252744512 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 0x79f5ec7dff50>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x79f5ec7dff50>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x79f5ec681d00>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x79f5ec681d00>}). I0422 13:20:04.024231 134186252744512 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0422 13:20:04.024304 134186252744512 async_checkpointer.py:192] [process=5][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x79f5bc179e40> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0422 13:20:05.083693 134186252744512 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/linen_xpk_feat_nnx_post_train_fixes_20260422_123906_11_optimizer_offload_false/checkpoints I0422 13:20:05.499510 134186252744512 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_20260422_123906/linen_xpk_feat_nnx_post_train_fixes_20260422_123906_11_optimizer_offload_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x79f5ec67eb40> I0422 13:20:05.499703 134186252744512 checkpointing.py:302] Checkpoint manager created! I0422 13:20:06.432084 134186252744512 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0422 13:20:06.432189 134186252744512 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0422 13:20:06.812720 134186252744512 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0422 13:20:06.812814 134186252744512 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0422 13:20:06.829248 134186252744512 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0422 13:20:06.829315 134186252744512 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0422 13:20:06.853132 134186252744512 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0422 13:20:06.853203 134186252744512 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0422 13:20:06.869880 134186252744512 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0422 13:20:06.869941 134186252744512 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0422 13:20:06.886420 134186252744512 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0422 13:20:06.886477 134186252744512 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0422 13:20:06.911252 134186252744512 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0422 13:20:06.911327 134186252744512 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0422 13:20:06.931981 134186252744512 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0422 13:20:06.932046 134186252744512 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0422 13:20:07.149908 134186252744512 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0422 13:20:07.150016 134186252744512 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0422 13:20:08.567597 134186252744512 maxtext_utils.py:1880] params/params/decoder/decoder_norm/scale Shape: float32[2048] Logical: P('norm',) Physical: (None,) I0422 13:20:08.567737 134186252744512 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) I0422 13:20:08.567793 134186252744512 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) I0422 13:20:08.567851 134186252744512 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') I0422 13:20:08.567907 134186252744512 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) I0422 13:20:08.567947 134186252744512 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) I0422 13:20:08.567999 134186252744512 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) I0422 13:20:08.568052 134186252744512 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') I0422 13:20:08.568092 134186252744512 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) I0422 13:20:08.568129 134186252744512 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) I0422 13:20:08.568177 134186252744512 maxtext_utils.py:1880] params/params/decoder/logits_dense/kernel Shape: float32[2048,32000] Logical: P('embed_vocab', 'vocab') Physical: ('fsdp', None) I0422 13:20:08.568228 134186252744512 maxtext_utils.py:1880] params/params/token_embedder/embedding Shape: float32[32000,2048] Logical: P('vocab', 'embed_vocab') Physical: (None, 'fsdp') I0422 13:20:09.060580 134186252744512 train.py:157] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0422 13:20:09.060683 134186252744512 train.py:157] train/xent Physical: float32[32,2048]............................................ ('fsdp', None). I0422 13:20:09.076154 134186252744512 train.py:164] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length'). I0422 13:20:09.076210 134186252744512 train.py:164] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None). I0422 13:20:19.827804 134186252744512 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. I0422 13:20:19.828625 134186252744512 metric_logger.py:301] number parameters: 1.104 billion I0422 13:20:31.190674 134186252744512 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0422 13:20:31.344585 134186252744512 checkpointing.py:798] Waited 0.15390467643737793 seconds for step 0 to finish before starting checkpointing. I0422 13:20:31.347133 134186252744512 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0422 13:20:31.348779 134186252744512 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 0 I0422 13:20:31.350260 134186252744512 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/linen_xpk_feat_nnx_post_train_fixes_20260422_123906_11_optimizer_offload_false/checkpoints/0. I0422 13:20:32.082496 134186252744512 signaling_client.py:364] Using JaxDistributedSignalingClient I0422 13:20:32.083418 134186252744512 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0422 13:20:32.083475 134186252744512 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 I0422 13:20:32.361416 134186252744512 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.278994s I0422 13:20:32.361589 134186252744512 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 5.419 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.284679651260376 s) (per-host) I0422 13:20:32.361643 134186252744512 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.284744s (batch_requests_ready=0.002488s, total_serialization_initiated=0.282183s, others=0.000073s) I0422 13:20:32.361755 134186252744512 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.288903s (all_items=0.000017s, per_item={'items': '0.00001740'}, temp_paths=0.288885) I0422 13:20:32.362563 134186252744512 event_tracking.py:125] [process=5] [async] Finished blocking save in 1.01 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/linen_xpk_feat_nnx_post_train_fixes_20260422_123906_11_optimizer_offload_false/checkpoints/0. I0422 13:20:32.362860 134056910714624 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-22 13:40:32.362829 I0422 13:20:32.366069 134186252744512 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0422 13:20:32.366292 134056352749312 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0422 13:20:32.366407 134186252744512 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/linen_xpk_feat_nnx_post_train_fixes_20260422_123906_11_optimizer_offload_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776864031.3471153, 'wait_for_prev_duration_secs': 6.008148193359375e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776864031.3488193, 'checkpointer_blocking_duration_secs': 1.0141820907592773, 'get_old_steps_start_time': 1776864032.3630264, 'get_old_steps_duration_secs': 3.0040740966796875e-05, 'checkpoint_manager_blocking_start_time': 1776864031.345079, 'checkpoint_manager_blocking_duration_secs': 1.021291732788086} I0422 13:20:32.366510 134186252744512 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0422 13:20:32.366560 134186252744512 max_utils.py:750] Memstats: After params initialized: I0422 13:20:32.366615 134186252744512 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_18(process=5,(2,4,0,0)) I0422 13:20:32.366669 134186252744512 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_19(process=5,(3,4,0,0)) I0422 13:20:32.366699 134186252744512 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_22(process=5,(2,5,0,0)) I0422 13:20:32.366724 134186252744512 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_23(process=5,(3,5,0,0)) I0422 13:20:32.675736 134186252744512 metric_logger.py:196] completed step: 0, seconds: 11.362, TFLOP/s/device: 1.196, Tokens/s/device: 180.251, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875 I0422 13:20:32.849961 134186252744512 metric_logger.py:196] completed step: 1, seconds: 1.484, TFLOP/s/device: 9.158, Tokens/s/device: 1380.458, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875 I0422 13:20:33.283269 134186252744512 metric_logger.py:196] completed step: 2, seconds: 0.027, TFLOP/s/device: 506.302, Tokens/s/device: 76315.397, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28637.129 I0422 13:20:33.430669 134186252744512 metric_logger.py:196] completed step: 3, seconds: 0.433, TFLOP/s/device: 31.343, Tokens/s/device: 4724.424, total_weights: 65536, loss: 9.734, lm_loss: 9.734, perplexity: 16889.203 I0422 13:20:33.725850 134186252744512 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.780, Tokens/s/device: 13381.947, total_weights: 65536, loss: 9.277, lm_loss: 9.277, perplexity: 10694.614 I0422 13:20:33.731559 134186252744512 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.164, Tokens/s/device: 13891.998, total_weights: 65536, loss: 8.892, lm_loss: 8.892, perplexity: 7270.717 I0422 13:20:36.192976 2845 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0422 13:20:38.422184 134056361142016 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_20260422_123906/linen_xpk_feat_nnx_post_train_fixes_20260422_123906_11_optimizer_offload_false/checkpoints/0/items/array_metadatas/process_5 I0422 13:20:56.032686 134186252744512 metric_logger.py:196] completed step: 6, seconds: 0.296, TFLOP/s/device: 45.974, Tokens/s/device: 6929.688, total_weights: 65536, loss: 8.592, lm_loss: 8.592, perplexity: 5390.759 I0422 13:20:56.179843 134186252744512 metric_logger.py:196] completed step: 7, seconds: 22.154, TFLOP/s/device: 0.613, Tokens/s/device: 92.445, total_weights: 65536, loss: 8.384, lm_loss: 8.384, perplexity: 4376.905 I0422 13:20:56.327061 134186252744512 metric_logger.py:196] completed step: 8, seconds: 0.153, TFLOP/s/device: 88.945, Tokens/s/device: 13406.826, total_weights: 65536, loss: 8.255, lm_loss: 8.255, perplexity: 3846.406 I0422 13:20:56.473735 134186252744512 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0422 13:20:56.474389 134186252744512 checkpointing.py:798] Waited 0.000675201416015625 seconds for step 9 to finish before starting checkpointing. I0422 13:20:56.476508 134186252744512 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0422 13:21:09.916256 134056910714624 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 41.745 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 37.83931040763855 s) (per-host) I0422 13:21:09.916379 134056910714624 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 37.553413s. I0422 13:21:18.621738 134056910714624 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 46.258757s. I0422 13:21:18.621960 134056352749312 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0422 13:21:18.622029 134056352749312 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0422 13:21:18.622090 134056352749312 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0422 13:21:18.623883 134056352749312 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0422 13:21:18.624067 134186252744512 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. W0422 13:21:18.624204 134186252744512 checkpoint_manager.py:1452] Waiting for previous save to complete took 22.147696 seconds. If this number is high, consider checkpointing less frequently. I0422 13:21:18.626160 134186252744512 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 9 I0422 13:21:18.628186 134186252744512 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/linen_xpk_feat_nnx_post_train_fixes_20260422_123906_11_optimizer_offload_false/checkpoints/9. I0422 13:21:18.925694 134186252744512 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array. I0422 13:21:18.925787 134186252744512 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 I0422 13:21:18.958094 134186252744512 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.033228s I0422 13:21:18.958270 134186252744512 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 41.949 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.03677225112915039 s) (per-host) I0422 13:21:18.958324 134186252744512 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.036836s (batch_requests_ready=0.001813s, total_serialization_initiated=0.034951s, others=0.000072s) I0422 13:21:18.958416 134186252744512 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.040997s (all_items=0.000016s, per_item={'items': '0.00001597'}, temp_paths=0.040981) I0422 13:21:18.959445 134186252744512 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.33 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/linen_xpk_feat_nnx_post_train_fixes_20260422_123906_11_optimizer_offload_false/checkpoints/9. I0422 13:21:18.959774 134056352749312 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-22 13:41:18.959741 I0422 13:21:18.963036 134186252744512 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0422 13:21:18.963335 134032834684672 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save. I0422 13:21:18.963500 134186252744512 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/linen_xpk_feat_nnx_post_train_fixes_20260422_123906_11_optimizer_offload_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776864056.4764779, 'wait_for_prev_duration_secs': 22.147696018218994, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776864078.6261992, 'checkpointer_blocking_duration_secs': 0.33371496200561523, 'get_old_steps_start_time': 1776864078.9599366, 'get_old_steps_duration_secs': 2.9802322387695312e-05, 'checkpoint_manager_blocking_start_time': 1776864056.4746118, 'checkpoint_manager_blocking_duration_secs': 22.488851070404053} I0422 13:21:18.963606 134186252744512 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0422 13:21:18.963660 134186252744512 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0422 13:21:24.155769 134056361142016 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_20260422_123906/linen_xpk_feat_nnx_post_train_fixes_20260422_123906_11_optimizer_offload_false/checkpoints/9/items/array_metadatas/process_5 I0422 13:21:59.844067 134056352749312 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 38.600 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 40.92253303527832 s) (per-host) I0422 13:21:59.844177 134056352749312 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 40.884292s. I0422 13:22:08.555687 134056352749312 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 49.595766s. I0422 13:22:08.555964 134032834684672 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save. I0422 13:22:08.556096 134032834684672 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save. I0422 13:22:08.556144 134032834684672 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0422 13:22:08.557615 134032834684672 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0422 13:22:08.557807 134186252744512 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. I0422 13:22:08.557951 134186252744512 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0422 13:22:08.558857 134186252744512 metric_logger.py:196] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.259, Tokens/s/device: 13906.242, 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: Wed Apr 22 13:22:18 UTC 2026 EXIT_CODE=0