MaxView

Timing Test Reference Updates
‹ 01_baseCase: 02_synthetic03_dropout ›

Metrics: main (59e0f1759) vs test/pipeline-scan-nnx (5b21b66fc)

Metricmain  59e0f1759test/pipeline-scan-nnx  5b21b66fcDiff (test/pipeline-scan-nnx − main)
Parameters1.104 billion1.104 billion—
Final loss8.17908.17900
TFLOP/s92.25192.182-0.069
Tok/s13905.013894.6-10.377
Avg s/step2.6392.695+0.056
Memory %1.381.380
JAX0.9.20.9.2—

Diff = branch value − main value. Green = branch improved. Red = branch regressed.

main  ·  59e0f1759  ·  main_20260425_071456  ·  full log 
XPK Start: Sat Apr 25 07:17:14 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. 
2026-04-25 07:17:39.733860: 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)
I0425 07:17:39.937303 132585359980352 max_utils.py:273] Attempting to initialize the jax distributed system...
I0425 07:17:48.978338 132585359980352 distributed.py:149] Starting JAX distributed service on [::]:8482
I0425 07:17:48.980713 132585359980352 distributed.py:172] Connecting to JAX distributed service on mt-02-synthetic-5gd3f-slice-job-0-0.mt-02-synthetic-5gd3f:8482
I0425 07:17:51.154454 132585359980352 max_utils.py:284] Jax distributed system initialized!
I0425 07:17:57.271776 132585359980352 max_utils.py:800] System Information: Jax Version: 0.9.2
I0425 07:17:57.271882 132585359980352 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0425 07:17:57.271925 132585359980352 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
I0425 07:17:57.271961 132585359980352 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0425 07:17:57.964924 132585359980352 maxtext_utils.py:1604] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1)
I0425 07:17:57.965222 132585359980352 checkpointing.py:677] Setting up checkpoint logger...
I0425 07:17:57.965283 132585359980352 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0425 07:17:57.965326 132585359980352 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0425 07:17:57.965666 132585359980352 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 0x789555d18d70>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0425 07:18:00.779971 132585359980352 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0425 07:18:00.780222 132585359980352 checkpoint_manager.py:708] [process=6][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7881105538c0>}, handler_registry=None
I0425 07:18:00.780462 132585359980352 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7881105538c0>` 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`.
I0425 07:18:00.780511 132585359980352 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x788110557680>` 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`.
I0425 07:18:00.780546 132585359980352 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 0x7881105538c0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7881105538c0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x788110557680>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x788110557680>}).
I0425 07:18:00.780868 132585359980352 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0425 07:18:00.780937 132585359980352 async_checkpointer.py:192] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7881102f1a80> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0425 07:18:01.897024 132585359980352 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_02_synthetic/checkpoints
I0425 07:18:02.743060 132585359980352 checkpoint_manager.py:929] [process=6][thread=MainThread] CheckpointManager created,  primary_host=0, CheckpointManagerOptions=CheckpointManagerOptions(save_interval_steps=1, max_to_keep=None, keep_time_interval=None, keep_period=None, should_keep_fn=None, best_fn=None, best_mode='max', keep_checkpoints_without_metrics=True, step_prefix=None, step_format_fixed_length=None, step_name_format=None, create=True, cleanup_tmp_directories=False, save_on_steps=frozenset(), single_host_load_and_broadcast=False, todelete_subdir=None, todelete_full_path=None, enable_background_delete=False, read_only=False, enable_async_checkpointing=True, async_options=None, multiprocessing_options=MultiprocessingOptions(primary_host=0, active_processes=None, barrier_sync_key_prefix=None), should_save_fn=None, file_options=FileOptions(path_permission_mode=None), save_root_metadata=True, temporary_path_class=None, save_decision_policy=FixedIntervalPolicy(interval=10), preservation_policy=LatestN(n=None), prevent_write_metrics=False, enable_should_save_is_saving_in_progress_check=True, enable_per_process_directory_creation=False, lightweight_initialize=False), root_directory=gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_02_synthetic/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7881280af440>
I0425 07:18:02.743262 132585359980352 checkpointing.py:301] Checkpoint manager created!
I0425 07:18:03.680360 132585359980352 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0425 07:18:03.680480 132585359980352 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0425 07:18:04.064875 132585359980352 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn').
I0425 07:18:04.064978 132585359980352 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0425 07:18:04.081506 132585359980352 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn').
I0425 07:18:04.081569 132585359980352 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0425 07:18:04.105378 132585359980352 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 07:18:04.105452 132585359980352 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 07:18:04.122063 132585359980352 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 07:18:04.122138 132585359980352 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 07:18:04.138668 132585359980352 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 07:18:04.138730 132585359980352 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 07:18:04.163480 132585359980352 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch_attn', 'activation_length_attn', 'activation_heads', 'activation_kv').
I0425 07:18:04.163554 132585359980352 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 07:18:04.184833 132585359980352 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0425 07:18:04.184900 132585359980352 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0425 07:18:04.395190 132585359980352 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0425 07:18:04.395302 132585359980352 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0425 07:18:05.831336 132585359980352 maxtext_utils.py:1707]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0425 07:18:05.831466 132585359980352 maxtext_utils.py:1707]  params/params/decoder/layers/mlp/wi_0/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0425 07:18:05.831520 132585359980352 maxtext_utils.py:1707]  params/params/decoder/layers/mlp/wi_1/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0425 07:18:05.831578 132585359980352 maxtext_utils.py:1707]  params/params/decoder/layers/mlp/wo/kernel
    Shape:     float32[7168,16,2048]
    Logical:   P('mlp', 'layers', 'embed')
    Physical:  (None, None, 'fsdp')
I0425 07:18:05.831632 132585359980352 maxtext_utils.py:1707]  params/params/decoder/layers/post_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0425 07:18:05.831670 132585359980352 maxtext_utils.py:1707]  params/params/decoder/layers/pre_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0425 07:18:05.831722 132585359980352 maxtext_utils.py:1707]  params/params/decoder/layers/self_attention/key/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   P('embed', 'layers', 'kv_heads', 'kv_head_dim')
    Physical:  ('fsdp', None, None, None)
I0425 07:18:05.831773 132585359980352 maxtext_utils.py:1707]  params/params/decoder/layers/self_attention/out/kernel
    Shape:     float32[16,16,128,2048]
    Logical:   P('heads', 'layers', 'kv', 'embed')
    Physical:  (None, None, None, 'fsdp')
I0425 07:18:05.831813 132585359980352 maxtext_utils.py:1707]  params/params/decoder/layers/self_attention/query/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   P('embed', 'layers', 'q_heads', 'kv')
    Physical:  ('fsdp', None, None, None)
I0425 07:18:05.831849 132585359980352 maxtext_utils.py:1707]  params/params/decoder/layers/self_attention/value/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   P('embed', 'layers', 'kv_heads', 'kv_head_dim')
    Physical:  ('fsdp', None, None, None)
I0425 07:18:05.831895 132585359980352 maxtext_utils.py:1707]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)

I0425 07:18:05.831943 132585359980352 maxtext_utils.py:1707]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')
I0425 07:18:06.324674 132585359980352 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0425 07:18:06.324772 132585359980352 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0425 07:18:06.340363 132585359980352 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0425 07:18:06.340423 132585359980352 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0425 07:18:17.394465 132585359980352 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.
I0425 07:18:17.395348 132585359980352 metric_logger.py:301] number parameters: 1.104 billion
I0425 07:18:29.301989 132585359980352 checkpointing.py:772] Waiting for step 0 to finish before checkpoint...
I0425 07:18:29.455207 132585359980352 checkpointing.py:776] Waited 0.1531982421875 seconds for step 0 to finish before starting checkpointing.
I0425 07:18:29.457512 132585359980352 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0425 07:18:29.459188 132585359980352 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 0
I0425 07:18:29.460691 132585359980352 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_02_synthetic/checkpoints/0.
I0425 07:18:29.791239 132585359980352 signaling_client.py:364] Using JaxDistributedSignalingClient
I0425 07:18:29.792126 132585359980352 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0425 07:18:29.792184 132585359980352 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
I0425 07:18:30.070457 132585359980352 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.279293s
I0425 07:18:30.070638 132585359980352 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.410 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28513145446777344 s) (per-host)
I0425 07:18:30.070692 132585359980352 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.285194s (batch_requests_ready=0.002397s, total_serialization_initiated=0.282726s, others=0.000071s)
I0425 07:18:30.070789 132585359980352 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.289593s (all_items=0.000017s, per_item={'items': '0.00001740'}, temp_paths=0.289575)
I0425 07:18:30.071574 132585359980352 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.61 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_02_synthetic/checkpoints/0.
I0425 07:18:30.071905 132457022441216 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 07:38:30.071868
I0425 07:18:30.077250 132585359980352 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0425 07:18:30.077560 132455431669504 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0425 07:18:30.077717 132585359980352 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_02_synthetic/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777101509.4574933, 'wait_for_prev_duration_secs': 6.246566772460938e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777101509.4592268, 'checkpointer_blocking_duration_secs': 0.6128330230712891, 'get_old_steps_start_time': 1777101510.072085, 'get_old_steps_duration_secs': 4.0531158447265625e-05, 'checkpoint_manager_blocking_start_time': 1777101509.4556687, 'checkpoint_manager_blocking_duration_secs': 0.62200927734375}
I0425 07:18:30.077824 132585359980352 checkpointing.py:408] Started an asynchronous checkpoint save for step 0
I0425 07:18:30.077874 132585359980352 max_utils.py:750] 
Memstats: After params initialized:
I0425 07:18:30.077927 132585359980352 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0))
I0425 07:18:30.077960 132585359980352 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0))
I0425 07:18:30.077986 132585359980352 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0))
I0425 07:18:30.078012 132585359980352 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0))
I0425 07:18:30.391735 132585359980352 metric_logger.py:196] completed step: 0, seconds: 11.907, TFLOP/s/device: 1.141, Tokens/s/device: 172.006, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0425 07:18:30.563669 132585359980352 metric_logger.py:196] completed step: 1, seconds: 1.088, TFLOP/s/device: 12.486, Tokens/s/device: 1881.995, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0425 07:18:30.977359 132585359980352 metric_logger.py:196] completed step: 2, seconds: 0.023, TFLOP/s/device: 583.439, Tokens/s/device: 87942.288, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28637.129
I0425 07:18:31.124693 132585359980352 metric_logger.py:196] completed step: 3, seconds: 0.415, TFLOP/s/device: 32.716, Tokens/s/device: 4931.339, total_weights: 65536, loss: 9.734, lm_loss: 9.734, perplexity: 16889.203
I0425 07:18:31.419734 132585359980352 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.822, Tokens/s/device: 13388.246, total_weights: 65536, loss: 9.277, lm_loss: 9.277, perplexity: 10694.614
I0425 07:18:31.425373 132585359980352 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.359, Tokens/s/device: 13921.366, total_weights: 65536, loss: 8.892, lm_loss: 8.892, perplexity: 7270.717
I0425 07:18:32.962966    2785 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0425 07:18:34.973730 132455440062208 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_02_synthetic/checkpoints/0/items/array_metadatas/process_6
I0425 07:18:52.905250 132585359980352 metric_logger.py:196] completed step: 6, seconds: 0.295, TFLOP/s/device: 45.981, Tokens/s/device: 6930.743, total_weights: 65536, loss: 8.592, lm_loss: 8.592, perplexity: 5390.759
I0425 07:18:53.052491 132585359980352 metric_logger.py:196] completed step: 7, seconds: 21.333, TFLOP/s/device: 0.637, Tokens/s/device: 96.002, total_weights: 65536, loss: 8.384, lm_loss: 8.384, perplexity: 4376.905
I0425 07:18:53.199927 132585359980352 metric_logger.py:196] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.268, Tokens/s/device: 13455.449, total_weights: 65536, loss: 8.255, lm_loss: 8.255, perplexity: 3846.406
I0425 07:18:53.346583 132585359980352 checkpointing.py:772] Waiting for step 9 to finish before checkpoint...
I0425 07:18:53.347171 132585359980352 checkpointing.py:776] Waited 0.0006105899810791016 seconds for step 9 to finish before starting checkpointing.
I0425 07:18:53.349421 132585359980352 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0425 07:19:06.949070 132457022441216 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 42.504 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 37.16352462768555 s) (per-host)
I0425 07:19:06.949221 132457022441216 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 36.877203s.
I0425 07:19:15.695349 132457022441216 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 45.623317s.
I0425 07:19:15.695673 132455431669504 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0425 07:19:15.695803 132455431669504 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0425 07:19:15.695857 132455431669504 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0425 07:19:15.697361 132455431669504 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0425 07:19:15.697559 132585359980352 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0425 07:19:15.697701 132585359980352 checkpoint_manager.py:1452] Waiting for previous save to complete took 22.348280 seconds. If this number is high, consider checkpointing less frequently.
I0425 07:19:15.699618 132585359980352 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 9
I0425 07:19:15.701623 132585359980352 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_02_synthetic/checkpoints/9.
I0425 07:19:15.978228 132585359980352 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0425 07:19:15.978327 132585359980352 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
I0425 07:19:16.012946 132585359980352 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.035756s
I0425 07:19:16.013134 132585359980352 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 39.160 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.03939199447631836 s) (per-host)
I0425 07:19:16.013184 132585359980352 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.039452s (batch_requests_ready=0.001932s, total_serialization_initiated=0.037451s, others=0.000069s)
I0425 07:19:16.013283 132585359980352 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.043586s (all_items=0.000015s, per_item={'items': '0.00001526'}, temp_paths=0.043571)
I0425 07:19:16.013988 132585359980352 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.31 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_02_synthetic/checkpoints/9.
I0425 07:19:16.014299 132455431669504 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 07:39:16.014260
I0425 07:19:16.016323 132585359980352 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0425 07:19:16.016622 132432078558976 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0425 07:19:16.016759 132585359980352 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_02_synthetic/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777101533.3493905, 'wait_for_prev_duration_secs': 22.34827995300293, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777101555.6996565, 'checkpointer_blocking_duration_secs': 0.3147892951965332, 'get_old_steps_start_time': 1777101556.0144696, 'get_old_steps_duration_secs': 3.0040740966796875e-05, 'checkpoint_manager_blocking_start_time': 1777101533.3473964, 'checkpoint_manager_blocking_duration_secs': 22.669329404830933}
I0425 07:19:16.016923 132585359980352 checkpointing.py:408] Started an asynchronous checkpoint save for step 9
I0425 07:19:16.016968 132585359980352 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0425 07:19:21.697988 132455440062208 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_02_synthetic/checkpoints/9/items/array_metadatas/process_6
I0425 07:19:57.902441 132455431669504 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 37.673 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.92865991592407 s) (per-host)
I0425 07:19:57.902578 132455431669504 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.888165s.
I0425 07:20:06.055785 132455431669504 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 50.041358s.
I0425 07:20:06.056069 132432078558976 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0425 07:20:06.056205 132432078558976 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0425 07:20:06.056255 132432078558976 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0425 07:20:06.057914 132432078558976 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0425 07:20:06.058083 132585359980352 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0425 07:20:06.058242 132585359980352 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0425 07:20:06.059201 132585359980352 metric_logger.py:196] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.251, Tokens/s/device: 13905.014, 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: Sat Apr 25 07:20:14 UTC 2026
EXIT_CODE=0
test/pipeline-scan-nnx  ·  5b21b66fc  ·  test_pipeline_scan_nnx_20260425_201227  ·  full log 
XPK Start: Sat Apr 25 20:14:34 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. 
2026-04-25 20:14:58.951647: 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)
I0425 20:14:59.161593 135619703928640 max_utils.py:273] Attempting to initialize the jax distributed system...
I0425 20:15:08.202729 135619703928640 distributed.py:149] Starting JAX distributed service on [::]:8482
I0425 20:15:08.205041 135619703928640 distributed.py:172] Connecting to JAX distributed service on mt-02-synthetic-3ycum-slice-job-0-0.mt-02-synthetic-3ycum:8482
I0425 20:15:09.619216 135619703928640 max_utils.py:284] Jax distributed system initialized!
I0425 20:15:15.932780 135619703928640 max_utils.py:800] System Information: Jax Version: 0.9.2
I0425 20:15:15.932885 135619703928640 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0425 20:15:15.932926 135619703928640 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
I0425 20:15:15.932966 135619703928640 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0425 20:15:16.627443 135619703928640 maxtext_utils.py:1565] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0425 20:15:16.627742 135619703928640 checkpointing.py:677] Setting up checkpoint logger...
I0425 20:15:16.627797 135619703928640 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0425 20:15:16.627843 135619703928640 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0425 20:15:16.628197 135619703928640 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 0x7b57dfd144d0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0425 20:15:19.464742 135619703928640 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0425 20:15:19.464979 135619703928640 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 0x7b438c533b00>}, handler_registry=None
I0425 20:15:19.465222 135619703928640 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7b438c533b00>` 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`.
I0425 20:15:19.465270 135619703928640 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7b438c534560>` 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`.
I0425 20:15:19.465304 135619703928640 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 0x7b438c533b00>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7b438c533b00>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7b438c534560>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7b438c534560>}).
I0425 20:15:19.465620 135619703928640 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0425 20:15:19.465703 135619703928640 async_checkpointer.py:192] [process=5][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7b436c6a32e0> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0425 20:15:20.894487 135619703928640 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_02_synthetic/checkpoints
I0425 20:15:21.220045 135619703928640 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_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_02_synthetic/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7b438c531400>
I0425 20:15:21.220225 135619703928640 checkpointing.py:301] Checkpoint manager created!
I0425 20:15:22.156450 135619703928640 nnx_wrappers.py:453] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0425 20:15:22.156564 135619703928640 nnx_wrappers.py:453] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0425 20:15:22.540593 135619703928640 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0425 20:15:22.540697 135619703928640 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0425 20:15:22.557024 135619703928640 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0425 20:15:22.557094 135619703928640 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0425 20:15:22.580569 135619703928640 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 20:15:22.580634 135619703928640 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 20:15:22.596994 135619703928640 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 20:15:22.597052 135619703928640 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 20:15:22.613409 135619703928640 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 20:15:22.613468 135619703928640 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 20:15:22.638078 135619703928640 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0425 20:15:22.638148 135619703928640 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 20:15:22.659103 135619703928640 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0425 20:15:22.659164 135619703928640 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0425 20:15:22.871099 135619703928640 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0425 20:15:22.871215 135619703928640 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0425 20:15:24.295060 135619703928640 maxtext_utils.py:1668]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0425 20:15:24.295185 135619703928640 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)
I0425 20:15:24.295242 135619703928640 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)
I0425 20:15:24.295300 135619703928640 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')
I0425 20:15:24.295351 135619703928640 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)
I0425 20:15:24.295388 135619703928640 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)
I0425 20:15:24.295437 135619703928640 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)
I0425 20:15:24.295487 135619703928640 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')
I0425 20:15:24.295525 135619703928640 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)
I0425 20:15:24.295559 135619703928640 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)
I0425 20:15:24.295608 135619703928640 maxtext_utils.py:1668]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)
I0425 20:15:24.295667 135619703928640 maxtext_utils.py:1668]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')

I0425 20:15:24.786980 135619703928640 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0425 20:15:24.787072 135619703928640 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0425 20:15:24.802662 135619703928640 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0425 20:15:24.802722 135619703928640 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0425 20:15:35.859049 135619703928640 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.
I0425 20:15:35.859885 135619703928640 metric_logger.py:301] number parameters: 1.104 billion
I0425 20:15:47.130988 135619703928640 checkpointing.py:772] Waiting for step 0 to finish before checkpoint...
I0425 20:15:47.348908 135619703928640 checkpointing.py:776] Waited 0.21789884567260742 seconds for step 0 to finish before starting checkpointing.
I0425 20:15:47.351270 135619703928640 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0425 20:15:47.352983 135619703928640 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 0
I0425 20:15:47.354347 135619703928640 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_02_synthetic/checkpoints/0.
I0425 20:15:47.683075 135619703928640 signaling_client.py:364] Using JaxDistributedSignalingClient
I0425 20:15:47.684097 135619703928640 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0425 20:15:47.684153 135619703928640 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
I0425 20:15:47.955037 135619703928640 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.272036s
I0425 20:15:47.955208 135619703928640 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 5.558 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2775588035583496 s) (per-host)
I0425 20:15:47.955261 135619703928640 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.277623s (batch_requests_ready=0.002352s, total_serialization_initiated=0.275199s, others=0.000072s)
I0425 20:15:47.955353 135619703928640 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.281640s (all_items=0.000017s, per_item={'items': '0.00001693'}, temp_paths=0.281623)
I0425 20:15:47.956136 135619703928640 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.60 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_02_synthetic/checkpoints/0.
I0425 20:15:47.956475 135490096781056 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 20:35:47.956439
I0425 20:15:47.970902 135619703928640 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0425 20:15:47.971219 135488489223936 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save.
I0425 20:15:47.971379 135619703928640 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_02_synthetic/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777148147.3512516, 'wait_for_prev_duration_secs': 5.936622619628906e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777148147.35302, 'checkpointer_blocking_duration_secs': 0.6036083698272705, 'get_old_steps_start_time': 1777148147.956664, 'get_old_steps_duration_secs': 3.0994415283203125e-05, 'checkpoint_manager_blocking_start_time': 1777148147.3494303, 'checkpoint_manager_blocking_duration_secs': 0.6219115257263184}
I0425 20:15:47.971490 135619703928640 checkpointing.py:408] Started an asynchronous checkpoint save for step 0
I0425 20:15:47.971539 135619703928640 max_utils.py:750] 
Memstats: After params initialized:
I0425 20:15:47.971590 135619703928640 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_18(process=5,(2,4,0,0))
I0425 20:15:47.971621 135619703928640 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_19(process=5,(3,4,0,0))
I0425 20:15:47.971647 135619703928640 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_22(process=5,(2,5,0,0))
I0425 20:15:47.971687 135619703928640 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_23(process=5,(3,5,0,0))
I0425 20:15:48.285592 135619703928640 metric_logger.py:196] completed step: 0, seconds: 11.271, TFLOP/s/device: 1.205, Tokens/s/device: 181.705, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0425 20:15:48.469087 135619703928640 metric_logger.py:196] completed step: 1, seconds: 1.153, TFLOP/s/device: 11.784, Tokens/s/device: 1776.180, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0425 20:15:48.885346 135619703928640 metric_logger.py:196] completed step: 2, seconds: 0.036, TFLOP/s/device: 375.511, Tokens/s/device: 56601.166, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28637.129
I0425 20:15:49.033034 135619703928640 metric_logger.py:196] completed step: 3, seconds: 0.416, TFLOP/s/device: 32.629, Tokens/s/device: 4918.265, total_weights: 65536, loss: 9.734, lm_loss: 9.734, perplexity: 16889.203
I0425 20:15:49.327984 135619703928640 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.597, Tokens/s/device: 13354.373, total_weights: 65536, loss: 9.277, lm_loss: 9.277, perplexity: 10694.614
I0425 20:15:49.333913 135619703928640 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.157, Tokens/s/device: 13890.867, total_weights: 65536, loss: 8.892, lm_loss: 8.892, perplexity: 7270.717
I0425 20:15:51.265368    2824 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0425 20:15:53.227890 135489004463872 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_02_synthetic/checkpoints/0/items/array_metadatas/process_5
I0425 20:16:11.232397 135619703928640 metric_logger.py:196] completed step: 6, seconds: 0.295, TFLOP/s/device: 45.987, Tokens/s/device: 6931.658, total_weights: 65536, loss: 8.592, lm_loss: 8.592, perplexity: 5390.759
I0425 20:16:11.379911 135619703928640 metric_logger.py:196] completed step: 7, seconds: 21.752, TFLOP/s/device: 0.625, Tokens/s/device: 94.154, total_weights: 65536, loss: 8.384, lm_loss: 8.384, perplexity: 4376.905
I0425 20:16:11.527184 135619703928640 metric_logger.py:196] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.159, Tokens/s/device: 13439.026, total_weights: 65536, loss: 8.255, lm_loss: 8.255, perplexity: 3846.406
I0425 20:16:11.673832 135619703928640 checkpointing.py:772] Waiting for step 9 to finish before checkpoint...
I0425 20:16:11.674492 135619703928640 checkpointing.py:776] Waited 0.0006818771362304688 seconds for step 9 to finish before starting checkpointing.
I0425 20:16:11.676706 135619703928640 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0425 20:16:25.622611 135490096781056 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 41.629 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 37.94492173194885 s) (per-host)
I0425 20:16:25.622734 135490096781056 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 37.666145s.
I0425 20:16:32.663627 135490096781056 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 44.707021s.
I0425 20:16:32.663940 135488489223936 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save.
I0425 20:16:32.664135 135488489223936 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save.
I0425 20:16:32.664195 135488489223936 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0425 20:16:32.666381 135488489223936 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0425 20:16:32.666587 135619703928640 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.
W0425 20:16:32.666760 135619703928640 checkpoint_manager.py:1452] Waiting for previous save to complete took 20.990053 seconds. If this number is high, consider checkpointing less frequently.
I0425 20:16:32.668589 135619703928640 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 9
I0425 20:16:32.671095 135619703928640 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_02_synthetic/checkpoints/9.
I0425 20:16:32.980272 135619703928640 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0425 20:16:32.980360 135619703928640 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
I0425 20:16:33.021499 135619703928640 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.042288s
I0425 20:16:33.021676 135619703928640 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 33.172 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.046501874923706055 s) (per-host)
I0425 20:16:33.021729 135619703928640 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.046577s (batch_requests_ready=0.002578s, total_serialization_initiated=0.043916s, others=0.000083s)
I0425 20:16:33.021818 135619703928640 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.050685s (all_items=0.000016s, per_item={'items': '0.00001621'}, temp_paths=0.050668)
I0425 20:16:33.022433 135619703928640 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.35 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_02_synthetic/checkpoints/9.
I0425 20:16:33.022796 135488489223936 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-25 20:36:33.022760
I0425 20:16:33.024724 135619703928640 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0425 20:16:33.025020 135466154129152 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save.
I0425 20:16:33.025156 135619703928640 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_02_synthetic/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777148171.676676, 'wait_for_prev_duration_secs': 20.990053415298462, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777148192.6686277, 'checkpointer_blocking_duration_secs': 0.35426998138427734, 'get_old_steps_start_time': 1777148193.0229218, 'get_old_steps_duration_secs': 2.86102294921875e-05, 'checkpoint_manager_blocking_start_time': 1777148171.6747413, 'checkpoint_manager_blocking_duration_secs': 21.35038447380066}
I0425 20:16:33.025321 135619703928640 checkpointing.py:408] Started an asynchronous checkpoint save for step 9
I0425 20:16:33.025367 135619703928640 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0425 20:16:38.093495 135489004463872 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_02_synthetic/checkpoints/9/items/array_metadatas/process_5
I0425 20:17:14.368372 135488489223936 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 38.161 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.393171310424805 s) (per-host)
I0425 20:17:14.368497 135488489223936 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.345087s.
I0425 20:17:21.753783 135488489223936 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 48.730359s.
I0425 20:17:21.754081 135466154129152 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save.
I0425 20:17:21.754200 135466154129152 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save.
I0425 20:17:21.754249 135466154129152 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0425 20:17:21.757491 135466154129152 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0425 20:17:21.757682 135619703928640 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.
I0425 20:17:21.757826 135619703928640 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0425 20:17:21.758811 135619703928640 metric_logger.py:196] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.182, Tokens/s/device: 13894.637, 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: Sat Apr 25 20:17:34 UTC 2026
EXIT_CODE=0