MaxView

Timing Test Reference Updates
‹ 08_checkpoint_async_true_saveCase: 09_pdb_lt_110_shardy_false ›

Metrics: main (586e69205) vs test/pipeline-scan-nnx (5b21b66fc)

Metricmain  586e69205test/pipeline-scan-nnx  5b21b66fcDiff (test/pipeline-scan-nnx − main)
Parameters1.104 billion1.104 billion—
Final loss5.89205.89200
TFLOP/s58.58358.230-0.353
Tok/s8830.38777.0-53.284
Avg s/step3.3883.348-0.04
Memory %1.381.380
JAX0.9.20.9.2—

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

main  ·  586e69205  ·  main_20260423_071538  ·  full log 
XPK Start: Thu Apr 23 07:51:18 UTC 2026
PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used.
`rope_parameters`'s factor field must be a float >= 1, got 40
`rope_parameters`'s beta_fast field must be a float, got 32
`rope_parameters`'s beta_slow field must be a float, got 1
DeepseekV32Config got `key=rope_scaling` in kwargs but hasn't set it as attribute. For RoPE standardization you need to set `self.rope_parameters` in model's config. 
2026-04-23 07:51:43.005064: E external/local_xla/xla/stream_executor/cuda/cuda_platform.cc:51] failed call to cuInit: INTERNAL: CUDA error: Failed call to cuInit: UNKNOWN ERROR (303)
I0423 07:51:43.213678 136787013527360 max_utils.py:273] Attempting to initialize the jax distributed system...
I0423 07:51:52.254612 136787013527360 distributed.py:149] Starting JAX distributed service on [::]:8482
I0423 07:51:52.256982 136787013527360 distributed.py:172] Connecting to JAX distributed service on mt-09-pdb-lt-1-0a2q8-slice-job-0-0.mt-09-pdb-lt-1-0a2q8:8482
I0423 07:51:53.743714 136787013527360 max_utils.py:284] Jax distributed system initialized!
I0423 07:51:59.756491 136787013527360 max_utils.py:800] System Information: Jax Version: 0.9.2
I0423 07:51:59.756598 136787013527360 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0423 07:51:59.756638 136787013527360 max_utils.py:802] System Information: Jax Backend: PJRT C API
TFRT TPU v6 lite
Built on Mar 4 2026 11:32:08 (1772652728) cl/878335365
I0423 07:51:59.756693 136787013527360 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0423 07:52:00.450295 136787013527360 maxtext_utils.py:1604] Num_devices: 32, shape (1, 1, 1, 8, 1, 1, 1, 1, 4, 1, 1, 1, 1)
I0423 07:52:00.450573 136787013527360 checkpointing.py:677] Setting up checkpoint logger...
I0423 07:52:00.450627 136787013527360 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0423 07:52:00.450685 136787013527360 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0423 07:52:00.451025 136787013527360 base_pytree_checkpoint_handler.py:441] Created BasePyTreeCheckpointHandler: use_ocdbt=True, use_zarr3=True, pytree_metadata_options=PyTreeMetadataOptions(support_rich_types=False), array_metadata_store=<orbax.checkpoint._src.metadata.array_metadata_store.Store object at 0x7c67a5d14c50>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0423 07:52:04.194893 136787013527360 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0423 07:52:04.195144 136787013527360 checkpoint_manager.py:708] [process=5][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7c536873be00>}, handler_registry=None
I0423 07:52:04.195375 136787013527360 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7c536873be00>` for item "items" and save args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>` to `_handler_registry`.
I0423 07:52:04.195422 136787013527360 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7c53687de150>` for item "metrics" and save args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>` to `_handler_registry`.
I0423 07:52:04.195457 136787013527360 composite_checkpoint_handler.py:505] Initialized registry DefaultCheckpointHandlerRegistry({('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeSaveArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7c536873be00>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7c536873be00>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7c53687de150>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7c53687de150>}).
I0423 07:52:04.195797 136787013527360 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0423 07:52:04.195863 136787013527360 async_checkpointer.py:192] [process=5][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7c5348711b20> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0423 07:52:04.867532 136787013527360 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_09_pdb_lt_1/checkpoints
I0423 07:52:05.307007 136787013527360 checkpoint_manager.py:929] [process=5][thread=MainThread] CheckpointManager created,  primary_host=0, CheckpointManagerOptions=CheckpointManagerOptions(save_interval_steps=1, max_to_keep=None, keep_time_interval=None, keep_period=None, should_keep_fn=None, best_fn=None, best_mode='max', keep_checkpoints_without_metrics=True, step_prefix=None, step_format_fixed_length=None, step_name_format=None, create=True, cleanup_tmp_directories=False, save_on_steps=frozenset(), single_host_load_and_broadcast=False, todelete_subdir=None, todelete_full_path=None, enable_background_delete=False, read_only=False, enable_async_checkpointing=True, async_options=None, multiprocessing_options=MultiprocessingOptions(primary_host=0, active_processes=None, barrier_sync_key_prefix=None), should_save_fn=None, file_options=FileOptions(path_permission_mode=None), save_root_metadata=True, temporary_path_class=None, save_decision_policy=FixedIntervalPolicy(interval=10), preservation_policy=LatestN(n=None), prevent_write_metrics=False, enable_should_save_is_saving_in_progress_check=True, enable_per_process_directory_creation=False, lightweight_initialize=False), root_directory=gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_09_pdb_lt_1/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7c53687d0b60>
I0423 07:52:05.307175 136787013527360 checkpointing.py:301] Checkpoint manager created!
I0423 07:52:06.226885 136787013527360 nnx_wrappers.py:437] Unknown Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0423 07:52:06.227006 136787013527360 nnx_wrappers.py:437] Unknown Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, 'tensor').
I0423 07:52:06.605701 136787013527360 attentions.py:1088] attentions/inputs_q Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0423 07:52:06.605797 136787013527360 attentions.py:1088] attentions/inputs_q Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, 'tensor').
I0423 07:52:06.622286 136787013527360 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0423 07:52:06.622347 136787013527360 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, 'tensor').
I0423 07:52:06.646183 136787013527360 attentions.py:1154] attentions/query Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0423 07:52:06.646249 136787013527360 attentions.py:1154] attentions/query Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, 'tensor', None).
I0423 07:52:06.662853 136787013527360 attentions.py:1155] attentions/key Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0423 07:52:06.662913 136787013527360 attentions.py:1155] attentions/key Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, 'tensor', None).
I0423 07:52:06.679329 136787013527360 attentions.py:1156] attentions/value Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0423 07:52:06.679393 136787013527360 attentions.py:1156] attentions/value Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, 'tensor', None).
I0423 07:52:06.704201 136787013527360 attentions.py:1198] attentions/out Logical: bfloat16[8,2048,16,128]..................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0423 07:52:06.704272 136787013527360 attentions.py:1198] attentions/out Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, 'tensor', None).
I0423 07:52:06.725508 136787013527360 linears.py:525] linears/x Logical: bfloat16[8,2048,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0423 07:52:06.725571 136787013527360 linears.py:525] linears/x Physical: bfloat16[8,2048,7168]....................................... ('fsdp', None, 'tensor').
I0423 07:52:06.938464 136787013527360 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0423 07:52:06.938576 136787013527360 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint.
fsdp: 8
tensor: 4
I0423 07:52:08.387416 136787013527360 maxtext_utils.py:1707]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  ('tensor',)
I0423 07:52:08.387551 136787013527360 maxtext_utils.py:1707]  params/params/decoder/layers/mlp/wi_0/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, 'tensor')
I0423 07:52:08.387605 136787013527360 maxtext_utils.py:1707]  params/params/decoder/layers/mlp/wi_1/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, 'tensor')
I0423 07:52:08.387679 136787013527360 maxtext_utils.py:1707]  params/params/decoder/layers/mlp/wo/kernel
    Shape:     float32[7168,16,2048]
    Logical:   P('mlp', 'layers', 'embed')
    Physical:  ('tensor', None, 'fsdp')
I0423 07:52:08.387888 136787013527360 maxtext_utils.py:1707]  params/params/decoder/layers/post_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  ('tensor', None)
I0423 07:52:08.388079 136787013527360 maxtext_utils.py:1707]  params/params/decoder/layers/pre_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  ('tensor', None)
I0423 07:52:08.388183 136787013527360 maxtext_utils.py:1707]  params/params/decoder/layers/self_attention/key/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   P('embed', 'layers', 'kv_heads', 'kv_head_dim')
    Physical:  ('fsdp', None, 'tensor', None)
I0423 07:52:08.388278 136787013527360 maxtext_utils.py:1707]  params/params/decoder/layers/self_attention/out/kernel
    Shape:     float32[16,16,128,2048]
    Logical:   P('heads', 'layers', 'kv', 'embed')
    Physical:  ('tensor', None, None, 'fsdp')
I0423 07:52:08.388332 136787013527360 maxtext_utils.py:1707]  params/params/decoder/layers/self_attention/query/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   P('embed', 'layers', 'q_heads', 'kv')
    Physical:  ('fsdp', None, 'tensor', None)
I0423 07:52:08.388374 136787013527360 maxtext_utils.py:1707]  params/params/decoder/layers/self_attention/value/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   P('embed', 'layers', 'kv_heads', 'kv_head_dim')
    Physical:  ('fsdp', None, 'tensor', None)
I0423 07:52:08.388431 136787013527360 maxtext_utils.py:1707]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', 'tensor')
I0423 07:52:08.388492 136787013527360 maxtext_utils.py:1707]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  ('tensor', 'fsdp')

I0423 07:52:08.887515 136787013527360 train.py:155] train/xent Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length').
I0423 07:52:08.887612 136787013527360 train.py:155] train/xent Physical: float32[8,2048]............................................. ('fsdp', None).
I0423 07:52:08.903216 136787013527360 train.py:162] train/z_loss Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length').
I0423 07:52:08.903279 136787013527360 train.py:162] train/z_loss Physical: float32[8,2048]............................................. ('fsdp', None).
I0423 07:52:23.998539 136787013527360 max_utils.py:791] Total memory size: 0.9 GB, Output size: 0.4 GB, Temp size: 0.5 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB.
I0423 07:52:23.999321 136787013527360 metric_logger.py:301] number parameters: 1.104 billion
I0423 07:52:25.573770 136787013527360 checkpointing.py:772] Waiting for step 0 to finish before checkpoint...
I0423 07:52:39.849961 136787013527360 checkpointing.py:776] Waited 14.276163816452026 seconds for step 0 to finish before starting checkpointing.
I0423 07:52:39.852271 136787013527360 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0423 07:52:39.854264 136787013527360 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 0
I0423 07:52:39.855633 136787013527360 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_09_pdb_lt_1/checkpoints/0.
I0423 07:52:40.560122 136787013527360 signaling_client.py:364] Using JaxDistributedSignalingClient
I0423 07:52:40.561012 136787013527360 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0423 07:52:40.561071 136787013527360 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0423 07:52:40.826185 136787013527360 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.266137s
I0423 07:52:40.826353 136787013527360 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 5.676 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.271775484085083 s) (per-host)
I0423 07:52:40.826403 136787013527360 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.271835s (batch_requests_ready=0.002371s, total_serialization_initiated=0.269397s, others=0.000067s)
I0423 07:52:40.826494 136787013527360 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.275970s (all_items=0.000018s, per_item={'items': '0.00001836'}, temp_paths=0.275952)
I0423 07:52:40.827323 136787013527360 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.97 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_09_pdb_lt_1/checkpoints/0.
I0423 07:52:40.827604 136659282687744 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 08:12:40.827573
I0423 07:52:40.829890 136787013527360 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0423 07:52:40.830193 136659257509632 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save.
I0423 07:52:40.830355 136787013527360 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_09_pdb_lt_1/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776930759.852253, 'wait_for_prev_duration_secs': 6.079673767089844e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776930759.8543026, 'checkpointer_blocking_duration_secs': 0.9734597206115723, 'get_old_steps_start_time': 1776930760.8277884, 'get_old_steps_duration_secs': 2.9325485229492188e-05, 'checkpoint_manager_blocking_start_time': 1776930759.8504884, 'checkpoint_manager_blocking_duration_secs': 0.9798288345336914}
I0423 07:52:40.830461 136787013527360 checkpointing.py:408] Started an asynchronous checkpoint save for step 0
I0423 07:52:40.830513 136787013527360 max_utils.py:750] 
Memstats: After params initialized:
I0423 07:52:40.830562 136787013527360 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_18(process=5,(2,4,0,0))
I0423 07:52:40.830595 136787013527360 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_19(process=5,(3,4,0,0))
I0423 07:52:40.830624 136787013527360 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_22(process=5,(2,5,0,0))
I0423 07:52:40.830664 136787013527360 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_23(process=5,(3,5,0,0))
I0423 07:52:41.140145 136787013527360 metric_logger.py:196] completed step: 0, seconds: 1.574, TFLOP/s/device: 2.158, Tokens/s/device: 325.215, total_weights: 16384, loss: 10.862, lm_loss: 10.862, perplexity: 52153.723
I0423 07:52:41.230454 136787013527360 metric_logger.py:196] completed step: 1, seconds: 15.565, TFLOP/s/device: 0.218, Tokens/s/device: 32.895, total_weights: 16384, loss: 10.862, lm_loss: 10.862, perplexity: 52153.723
I0423 07:52:41.633573 136787013527360 metric_logger.py:196] completed step: 2, seconds: 0.032, TFLOP/s/device: 106.316, Tokens/s/device: 16025.039, total_weights: 16384, loss: 9.763, lm_loss: 9.763, perplexity: 17373.129
I0423 07:52:41.691857 136787013527360 metric_logger.py:196] completed step: 3, seconds: 0.403, TFLOP/s/device: 8.424, Tokens/s/device: 1269.725, total_weights: 16384, loss: 8.823, lm_loss: 8.823, perplexity: 6791.817
I0423 07:52:41.808950 136787013527360 metric_logger.py:196] completed step: 4, seconds: 0.064, TFLOP/s/device: 52.958, Tokens/s/device: 7982.414, total_weights: 16384, loss: 7.947, lm_loss: 7.947, perplexity: 2828.417
I0423 07:52:41.814574 136787013527360 metric_logger.py:196] completed step: 5, seconds: 0.058, TFLOP/s/device: 58.343, Tokens/s/device: 8794.078, total_weights: 16384, loss: 7.212, lm_loss: 7.212, perplexity: 1355.339
I0423 07:52:43.710017    2509 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0423 07:52:46.161417 136659265902336 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_09_pdb_lt_1/checkpoints/0/items/array_metadatas/process_5
I0423 07:52:56.001365 136787013527360 metric_logger.py:196] completed step: 6, seconds: 0.117, TFLOP/s/device: 28.919, Tokens/s/device: 4358.968, total_weights: 16384, loss: 6.652, lm_loss: 6.652, perplexity: 774.659
I0423 07:52:56.059696 136787013527360 metric_logger.py:196] completed step: 7, seconds: 14.129, TFLOP/s/device: 0.240, Tokens/s/device: 36.238, total_weights: 16384, loss: 6.269, lm_loss: 6.269, perplexity: 527.696
I0423 07:52:56.118057 136787013527360 metric_logger.py:196] completed step: 8, seconds: 0.063, TFLOP/s/device: 53.643, Tokens/s/device: 8085.657, total_weights: 16384, loss: 6.031, lm_loss: 6.031, perplexity: 416.165
I0423 07:52:56.175677 136787013527360 checkpointing.py:772] Waiting for step 9 to finish before checkpoint...
I0423 07:52:56.176280 136787013527360 checkpointing.py:776] Waited 0.0006439685821533203 seconds for step 9 to finish before starting checkpointing.
I0423 07:52:56.179532 136787013527360 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0423 07:53:17.574971 136659282687744 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 42.668 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 37.020325899124146 s) (per-host)
I0423 07:53:17.575100 136659282687744 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 36.747373s.
I0423 07:53:25.154350 136659282687744 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 44.326607s.
I0423 07:53:25.154620 136659257509632 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save.
I0423 07:53:25.154762 136659257509632 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save.
I0423 07:53:25.154824 136659257509632 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0423 07:53:25.156922 136659257509632 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0423 07:53:25.157098 136787013527360 checkpoint_manager.py:2032] [process=5][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0423 07:53:25.157229 136787013527360 checkpoint_manager.py:1452] Waiting for previous save to complete took 28.977697 seconds. If this number is high, consider checkpointing less frequently.
I0423 07:53:25.159279 136787013527360 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 9
I0423 07:53:25.161582 136787013527360 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_09_pdb_lt_1/checkpoints/9.
I0423 07:53:25.871907 136787013527360 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0423 07:53:25.872003 136787013527360 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0423 07:53:25.897622 136787013527360 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.026779s
I0423 07:53:25.897802 136787013527360 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 50.696 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.030428171157836914 s) (per-host)
I0423 07:53:25.897853 136787013527360 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.030489s (batch_requests_ready=0.001933s, total_serialization_initiated=0.028488s, others=0.000069s)
I0423 07:53:25.897949 136787013527360 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.035417s (all_items=0.000015s, per_item={'items': '0.00001526'}, temp_paths=0.035402)
I0423 07:53:25.898604 136787013527360 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.74 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_09_pdb_lt_1/checkpoints/9.
I0423 07:53:25.898871 136659257509632 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 08:13:25.898847
I0423 07:53:25.902461 136787013527360 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0423 07:53:25.902764 136658745816832 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save.
I0423 07:53:25.902925 136787013527360 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_09_pdb_lt_1/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776930776.1795013, 'wait_for_prev_duration_secs': 28.977696657180786, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776930805.1593187, 'checkpointer_blocking_duration_secs': 0.7396523952484131, 'get_old_steps_start_time': 1776930805.8989968, 'get_old_steps_duration_secs': 2.9325485229492188e-05, 'checkpoint_manager_blocking_start_time': 1776930776.176499, 'checkpoint_manager_blocking_duration_secs': 29.726391315460205}
I0423 07:53:25.903038 136787013527360 checkpointing.py:408] Started an asynchronous checkpoint save for step 9
I0423 07:53:25.903084 136787013527360 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0423 07:53:31.402973 136664735258368 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_09_pdb_lt_1/checkpoints/9/items/array_metadatas/process_5
I0423 07:54:08.024563 136659257509632 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 37.469 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.157129526138306 s) (per-host)
I0423 07:54:08.024700 136659257509632 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.125750s.
I0423 07:54:15.125515 136659257509632 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 49.226550s.
I0423 07:54:15.125868 136658745816832 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save.
I0423 07:54:15.126015 136658745816832 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save.
I0423 07:54:15.126063 136658745816832 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0423 07:54:15.127613 136658745816832 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0423 07:54:15.127801 136787013527360 checkpoint_manager.py:2032] [process=5][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0423 07:54:15.127975 136787013527360 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0423 07:54:15.128954 136787013527360 metric_logger.py:196] completed step: 9, seconds: 0.058, TFLOP/s/device: 58.583, Tokens/s/device: 8830.327, total_weights: 16384, loss: 5.892, lm_loss: 5.892, perplexity: 361.955
Per train step:
 Total TFLOPs: 3.40 
 split as 93.93% learnable weight flops and 6.07% attention flops
XPK End: Thu Apr 23 07:54:23 UTC 2026
EXIT_CODE=0
test/pipeline-scan-nnx  ·  5b21b66fc  ·  test_pipeline_scan_nnx_20260423_211617  ·  full log 
XPK Start: Thu Apr 23 21:47:46 UTC 2026
PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used.
`rope_parameters`'s factor field must be a float >= 1, got 40
`rope_parameters`'s beta_fast field must be a float, got 32
`rope_parameters`'s beta_slow field must be a float, got 1
DeepseekV32Config got `key=rope_scaling` in kwargs but hasn't set it as attribute. For RoPE standardization you need to set `self.rope_parameters` in model's config. 
2026-04-23 21:48:10.941722: E external/local_xla/xla/stream_executor/cuda/cuda_platform.cc:51] failed call to cuInit: INTERNAL: CUDA error: Failed call to cuInit: UNKNOWN ERROR (303)
I0423 21:48:11.151238 136048720987968 max_utils.py:273] Attempting to initialize the jax distributed system...
I0423 21:48:20.191963 136048720987968 distributed.py:149] Starting JAX distributed service on [::]:8482
I0423 21:48:20.194463 136048720987968 distributed.py:172] Connecting to JAX distributed service on mt-09-pdb-lt-1-f6yfr-slice-job-0-0.mt-09-pdb-lt-1-f6yfr:8482
I0423 21:48:21.283526 136048720987968 max_utils.py:284] Jax distributed system initialized!
I0423 21:48:27.432862 136048720987968 max_utils.py:800] System Information: Jax Version: 0.9.2
I0423 21:48:27.432972 136048720987968 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0423 21:48:27.433027 136048720987968 max_utils.py:802] System Information: Jax Backend: PJRT C API
TFRT TPU v6 lite
Built on Mar 4 2026 11:32:08 (1772652728) cl/878335365
I0423 21:48:27.433074 136048720987968 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0423 21:48:28.133789 136048720987968 maxtext_utils.py:1565] Num_devices: 32, shape (1, 1, 1, 8, 1, 1, 1, 1, 4, 1, 1, 1, 1)
I0423 21:48:28.134069 136048720987968 checkpointing.py:677] Setting up checkpoint logger...
I0423 21:48:28.134124 136048720987968 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0423 21:48:28.134169 136048720987968 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0423 21:48:28.134523 136048720987968 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 0x7bbbb6b18d40>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0423 21:48:31.045355 136048720987968 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0423 21:48:31.045593 136048720987968 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 0x7ba76c05cc50>}, handler_registry=None
I0423 21:48:31.045845 136048720987968 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ba76c05cc50>` for item "items" and save args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>` to `_handler_registry`.
I0423 21:48:31.045896 136048720987968 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ba73c64da00>` for item "metrics" and save args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>` to `_handler_registry`.
I0423 21:48:31.045932 136048720987968 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 0x7ba76c05cc50>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ba76c05cc50>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ba73c64da00>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ba73c64da00>}).
I0423 21:48:31.046314 136048720987968 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0423 21:48:31.046394 136048720987968 async_checkpointer.py:192] [process=5][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7ba72c227560> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0423 21:48:32.564320 136048720987968 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_09_pdb_lt_1/checkpoints
I0423 21:48:32.575150 136048720987968 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_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_09_pdb_lt_1/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7ba76c0910a0>
I0423 21:48:32.575276 136048720987968 checkpointing.py:301] Checkpoint manager created!
I0423 21:48:33.504026 136048720987968 nnx_wrappers.py:453] Unknown Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0423 21:48:33.504142 136048720987968 nnx_wrappers.py:453] Unknown Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, 'tensor').
I0423 21:48:33.883614 136048720987968 attentions.py:1088] attentions/inputs_q Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0423 21:48:33.883719 136048720987968 attentions.py:1088] attentions/inputs_q Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, 'tensor').
I0423 21:48:33.900256 136048720987968 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[8,2048,2048]....................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0423 21:48:33.900313 136048720987968 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[8,2048,2048]....................................... ('fsdp', None, 'tensor').
I0423 21:48:33.923917 136048720987968 attentions.py:1154] attentions/query Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0423 21:48:33.923986 136048720987968 attentions.py:1154] attentions/query Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, 'tensor', None).
I0423 21:48:33.940489 136048720987968 attentions.py:1155] attentions/key Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0423 21:48:33.940557 136048720987968 attentions.py:1155] attentions/key Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, 'tensor', None).
I0423 21:48:33.957019 136048720987968 attentions.py:1156] attentions/value Logical: bfloat16[8,2048,16,128]..................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0423 21:48:33.957081 136048720987968 attentions.py:1156] attentions/value Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, 'tensor', None).
I0423 21:48:33.981984 136048720987968 attentions.py:1198] attentions/out Logical: bfloat16[8,2048,16,128]..................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0423 21:48:33.982056 136048720987968 attentions.py:1198] attentions/out Physical: bfloat16[8,2048,16,128]..................................... ('fsdp', None, 'tensor', None).
I0423 21:48:34.003091 136048720987968 linears.py:525] linears/x Logical: bfloat16[8,2048,7168]....................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0423 21:48:34.003154 136048720987968 linears.py:525] linears/x Physical: bfloat16[8,2048,7168]....................................... ('fsdp', None, 'tensor').
I0423 21:48:34.213324 136048720987968 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0423 21:48:34.213433 136048720987968 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint.
fsdp: 8
tensor: 4
I0423 21:48:35.644825 136048720987968 maxtext_utils.py:1668]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  ('tensor',)
I0423 21:48:35.644952 136048720987968 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, 'tensor')
I0423 21:48:35.645006 136048720987968 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, 'tensor')
I0423 21:48:35.645069 136048720987968 maxtext_utils.py:1668]  params/params/decoder/layers/mlp/wo/kernel
    Shape:     float32[7168,16,2048]
    Logical:   P('mlp', 'layers', 'embed')
    Physical:  ('tensor', None, 'fsdp')
I0423 21:48:35.645125 136048720987968 maxtext_utils.py:1668]  params/params/decoder/layers/post_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  ('tensor', None)
I0423 21:48:35.645166 136048720987968 maxtext_utils.py:1668]  params/params/decoder/layers/pre_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  ('tensor', None)
I0423 21:48:35.645220 136048720987968 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, 'tensor', None)
I0423 21:48:35.645277 136048720987968 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:  ('tensor', None, None, 'fsdp')
I0423 21:48:35.645319 136048720987968 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, 'tensor', None)
I0423 21:48:35.645357 136048720987968 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, 'tensor', None)
I0423 21:48:35.645404 136048720987968 maxtext_utils.py:1668]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', 'tensor')

I0423 21:48:35.645452 136048720987968 maxtext_utils.py:1668]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  ('tensor', 'fsdp')
I0423 21:48:36.134724 136048720987968 train.py:155] train/xent Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length').
I0423 21:48:36.134818 136048720987968 train.py:155] train/xent Physical: float32[8,2048]............................................. ('fsdp', None).
I0423 21:48:36.150428 136048720987968 train.py:162] train/z_loss Logical: float32[8,2048]............................................. ('activation_embed_and_logits_batch', 'activation_length').
I0423 21:48:36.150488 136048720987968 train.py:162] train/z_loss Physical: float32[8,2048]............................................. ('fsdp', None).
I0423 21:48:51.244885 136048720987968 max_utils.py:791] Total memory size: 0.9 GB, Output size: 0.4 GB, Temp size: 0.5 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB.
I0423 21:48:51.245783 136048720987968 metric_logger.py:301] number parameters: 1.104 billion
I0423 21:48:52.860803 136048720987968 checkpointing.py:772] Waiting for step 0 to finish before checkpoint...
I0423 21:49:07.353025 136048720987968 checkpointing.py:776] Waited 14.492198705673218 seconds for step 0 to finish before starting checkpointing.
I0423 21:49:07.355554 136048720987968 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0423 21:49:07.357566 136048720987968 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 0
I0423 21:49:07.358924 136048720987968 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_09_pdb_lt_1/checkpoints/0.
I0423 21:49:07.690006 136048720987968 signaling_client.py:364] Using JaxDistributedSignalingClient
I0423 21:49:07.690933 136048720987968 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0423 21:49:07.690991 136048720987968 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0423 21:49:07.957119 136048720987968 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.267188s
I0423 21:49:07.957302 136048720987968 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 5.656 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.27274203300476074 s) (per-host)
I0423 21:49:07.957358 136048720987968 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.272809s (batch_requests_ready=0.002244s, total_serialization_initiated=0.270490s, others=0.000075s)
I0423 21:49:07.957452 136048720987968 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.277485s (all_items=0.000018s, per_item={'items': '0.00001812'}, temp_paths=0.277467)
I0423 21:49:07.958256 136048720987968 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_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_09_pdb_lt_1/checkpoints/0.
I0423 21:49:07.958545 135920407983872 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 22:09:07.958513
I0423 21:49:07.964939 136048720987968 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0423 21:49:07.965255 135920382805760 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save.
I0423 21:49:07.965414 136048720987968 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_09_pdb_lt_1/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776980947.3555348, 'wait_for_prev_duration_secs': 6.318092346191406e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776980947.3576045, 'checkpointer_blocking_duration_secs': 0.6011149883270264, 'get_old_steps_start_time': 1776980947.9587464, 'get_old_steps_duration_secs': 3.075599670410156e-05, 'checkpoint_manager_blocking_start_time': 1776980947.3535862, 'checkpoint_manager_blocking_duration_secs': 0.6117861270904541}
I0423 21:49:07.965529 136048720987968 checkpointing.py:408] Started an asynchronous checkpoint save for step 0
I0423 21:49:07.965581 136048720987968 max_utils.py:750] 
Memstats: After params initialized:
I0423 21:49:07.965632 136048720987968 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_18(process=5,(2,4,0,0))
I0423 21:49:07.965682 136048720987968 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_19(process=5,(3,4,0,0))
I0423 21:49:07.965711 136048720987968 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_22(process=5,(2,5,0,0))
I0423 21:49:07.965738 136048720987968 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_23(process=5,(3,5,0,0))
I0423 21:49:08.278835 136048720987968 metric_logger.py:196] completed step: 0, seconds: 1.615, TFLOP/s/device: 2.103, Tokens/s/device: 317.048, total_weights: 16384, loss: 10.862, lm_loss: 10.862, perplexity: 52153.723
I0423 21:49:08.382639 136048720987968 metric_logger.py:196] completed step: 1, seconds: 15.416, TFLOP/s/device: 0.220, Tokens/s/device: 33.211, total_weights: 16384, loss: 10.862, lm_loss: 10.862, perplexity: 52153.723
I0423 21:49:08.802454 136048720987968 metric_logger.py:196] completed step: 2, seconds: 0.046, TFLOP/s/device: 74.528, Tokens/s/device: 11233.736, total_weights: 16384, loss: 9.763, lm_loss: 9.763, perplexity: 17373.129
I0423 21:49:08.860742 136048720987968 metric_logger.py:196] completed step: 3, seconds: 0.420, TFLOP/s/device: 8.082, Tokens/s/device: 1218.204, total_weights: 16384, loss: 8.823, lm_loss: 8.823, perplexity: 6791.817
I0423 21:49:08.977920 136048720987968 metric_logger.py:196] completed step: 4, seconds: 0.064, TFLOP/s/device: 53.125, Tokens/s/device: 8007.507, total_weights: 16384, loss: 7.947, lm_loss: 7.947, perplexity: 2828.417
I0423 21:49:08.984023 136048720987968 metric_logger.py:196] completed step: 5, seconds: 0.058, TFLOP/s/device: 58.551, Tokens/s/device: 8825.456, total_weights: 16384, loss: 7.212, lm_loss: 7.212, perplexity: 1355.339
I0423 21:49:10.901674    2537 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0423 21:49:12.921710 135920391198464 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_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_09_pdb_lt_1/checkpoints/0/items/array_metadatas/process_5
I0423 21:49:22.927630 136048720987968 metric_logger.py:196] completed step: 6, seconds: 0.118, TFLOP/s/device: 28.811, Tokens/s/device: 4342.700, total_weights: 16384, loss: 6.652, lm_loss: 6.652, perplexity: 774.659
I0423 21:49:22.986291 136048720987968 metric_logger.py:196] completed step: 7, seconds: 13.886, TFLOP/s/device: 0.245, Tokens/s/device: 36.872, total_weights: 16384, loss: 6.269, lm_loss: 6.269, perplexity: 527.696
I0423 21:49:23.044458 136048720987968 metric_logger.py:196] completed step: 8, seconds: 0.063, TFLOP/s/device: 53.615, Tokens/s/device: 8081.446, total_weights: 16384, loss: 6.031, lm_loss: 6.031, perplexity: 416.165
I0423 21:49:23.102215 136048720987968 checkpointing.py:772] Waiting for step 9 to finish before checkpoint...
I0423 21:49:23.102866 136048720987968 checkpointing.py:776] Waited 0.0006685256958007812 seconds for step 9 to finish before starting checkpointing.
I0423 21:49:23.105968 136048720987968 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0423 21:49:43.878856 135920407983872 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 43.642 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 36.19425630569458 s) (per-host)
I0423 21:49:43.878983 135920407983872 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 35.920311s.
I0423 21:49:53.262937 135920407983872 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 45.304249s.
I0423 21:49:53.263246 135920382805760 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save.
I0423 21:49:53.263361 135920382805760 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save.
I0423 21:49:53.263413 135920382805760 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0423 21:49:53.265325 135920382805760 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0423 21:49:53.265501 136048720987968 checkpoint_manager.py:2032] [process=5][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0423 21:49:53.265660 136048720987968 checkpoint_manager.py:1452] Waiting for previous save to complete took 30.159679 seconds. If this number is high, consider checkpointing less frequently.
I0423 21:49:53.267626 136048720987968 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 9
I0423 21:49:53.269632 136048720987968 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_09_pdb_lt_1/checkpoints/9.
I0423 21:49:53.553108 136048720987968 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0423 21:49:53.553202 136048720987968 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0423 21:49:53.578809 136048720987968 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.026888s
I0423 21:49:53.578946 136048720987968 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 50.875 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.03032088279724121 s) (per-host)
I0423 21:49:53.578996 136048720987968 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.030379s (batch_requests_ready=0.001791s, total_serialization_initiated=0.028518s, others=0.000069s)
I0423 21:49:53.579073 136048720987968 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.034483s (all_items=0.000015s, per_item={'items': '0.00001550'}, temp_paths=0.034467)
I0423 21:49:53.579789 136048720987968 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.31 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_09_pdb_lt_1/checkpoints/9.
I0423 21:49:53.580128 135920382805760 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 22:09:53.580090
I0423 21:49:53.583176 136048720987968 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0423 21:49:53.583411 135919827404544 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save.
I0423 21:49:53.583539 136048720987968 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_09_pdb_lt_1/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776980963.105939, 'wait_for_prev_duration_secs': 30.159679174423218, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776980993.2676775, 'checkpointer_blocking_duration_secs': 0.3126089572906494, 'get_old_steps_start_time': 1776980993.5803106, 'get_old_steps_duration_secs': 2.956390380859375e-05, 'checkpoint_manager_blocking_start_time': 1776980963.1030934, 'checkpoint_manager_blocking_duration_secs': 30.480411291122437}
I0423 21:49:53.583661 136048720987968 checkpointing.py:408] Started an asynchronous checkpoint save for step 9
I0423 21:49:53.583707 136048720987968 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0423 21:49:59.220260 135913434773248 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_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_09_pdb_lt_1/checkpoints/9/items/array_metadatas/process_5
I0423 21:50:35.534951 135920382805760 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 37.622 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.98628115653992 s) (per-host)
I0423 21:50:35.535080 135920382805760 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.954829s.
I0423 21:50:42.580158 135920382805760 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 48.999892s.
I0423 21:50:42.580398 135919827404544 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save.
I0423 21:50:42.580470 135919827404544 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save.
I0423 21:50:42.580530 135919827404544 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0423 21:50:42.583033 135919827404544 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0423 21:50:42.583209 136048720987968 checkpoint_manager.py:2032] [process=5][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0423 21:50:42.583360 136048720987968 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0423 21:50:42.584220 136048720987968 metric_logger.py:196] completed step: 9, seconds: 0.058, TFLOP/s/device: 58.230, Tokens/s/device: 8777.043, total_weights: 16384, loss: 5.892, lm_loss: 5.892, perplexity: 361.955
Per train step:
 Total TFLOPs: 3.40 
 split as 93.93% learnable weight flops and 6.07% attention flops
XPK End: Thu Apr 23 21:50:51 UTC 2026
EXIT_CODE=0