MaxView

Timing Test Reference Updates
‹ 05_fp8Case: 06_grad_accum07_eval ›

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 loss9.45709.45700
TFLOP/s93.95293.973+0.021
Tok/s14161.414164.7+3.281
Avg s/step7.0026.843-0.159
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 07:34:09 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 07:34:34.860287: 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 07:34:35.071176 137687193626432 max_utils.py:273] Attempting to initialize the jax distributed system...
I0423 07:34:44.110837 137687193626432 distributed.py:149] Starting JAX distributed service on [::]:8482
I0423 07:34:44.113262 137687193626432 distributed.py:172] Connecting to JAX distributed service on mt-06-grad-accum-ixzpw-slice-job-0-0.mt-06-grad-accum-ixzpw:8482
I0423 07:34:45.349770 137687193626432 max_utils.py:284] Jax distributed system initialized!
I0423 07:34:51.439265 137687193626432 max_utils.py:800] System Information: Jax Version: 0.9.2
I0423 07:34:51.439371 137687193626432 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0423 07:34:51.439411 137687193626432 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 07:34:51.439446 137687193626432 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0423 07:34:52.129706 137687193626432 maxtext_utils.py:1604] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0423 07:34:52.129978 137687193626432 checkpointing.py:677] Setting up checkpoint logger...
I0423 07:34:52.130032 137687193626432 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0423 07:34:52.130076 137687193626432 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0423 07:34:52.130415 137687193626432 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 0x7d39711c26c0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0423 07:34:55.025825 137687193626432 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0423 07:34:55.026064 137687193626432 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 0x7d250c469a00>}, handler_registry=None
I0423 07:34:55.026303 137687193626432 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d250c469a00>` 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 07:34:55.026351 137687193626432 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d250c46d460>` 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 07:34:55.026388 137687193626432 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 0x7d250c469a00>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d250c469a00>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d250c46d460>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d250c46d460>}).
I0423 07:34:55.026723 137687193626432 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0423 07:34:55.026793 137687193626432 async_checkpointer.py:192] [process=5][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7d250c26da80> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0423 07:34:56.628008 137687193626432 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_06_grad_accum/checkpoints
I0423 07:34:56.674486 137687193626432 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_06_grad_accum/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7d250c46a810>
I0423 07:34:56.674631 137687193626432 checkpointing.py:301] Checkpoint manager created!
I0423 07:34:58.391894 137687193626432 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0423 07:34:58.392013 137687193626432 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0423 07:34:58.776692 137687193626432 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0423 07:34:58.776784 137687193626432 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0423 07:34:58.793683 137687193626432 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0423 07:34:58.793744 137687193626432 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0423 07:34:58.817907 137687193626432 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0423 07:34:58.817985 137687193626432 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0423 07:34:58.834848 137687193626432 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0423 07:34:58.834908 137687193626432 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0423 07:34:58.851855 137687193626432 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0423 07:34:58.851913 137687193626432 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0423 07:34:58.877067 137687193626432 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0423 07:34:58.877134 137687193626432 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0423 07:34:58.898402 137687193626432 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0423 07:34:58.898470 137687193626432 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0423 07:34:59.109830 137687193626432 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0423 07:34:59.109941 137687193626432 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0423 07:35:00.533377 137687193626432 maxtext_utils.py:1707]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0423 07:35:00.533503 137687193626432 maxtext_utils.py:1707]  params/params/decoder/layers/mlp/wi_0/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0423 07:35:00.533556 137687193626432 maxtext_utils.py:1707]  params/params/decoder/layers/mlp/wi_1/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0423 07:35:00.533615 137687193626432 maxtext_utils.py:1707]  params/params/decoder/layers/mlp/wo/kernel
    Shape:     float32[7168,16,2048]
    Logical:   P('mlp', 'layers', 'embed')
    Physical:  (None, None, 'fsdp')
I0423 07:35:00.533680 137687193626432 maxtext_utils.py:1707]  params/params/decoder/layers/post_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0423 07:35:00.533724 137687193626432 maxtext_utils.py:1707]  params/params/decoder/layers/pre_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0423 07:35:00.533778 137687193626432 maxtext_utils.py:1707]  params/params/decoder/layers/self_attention/key/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   P('embed', 'layers', 'kv_heads', 'kv_head_dim')
    Physical:  ('fsdp', None, None, None)
I0423 07:35:00.533831 137687193626432 maxtext_utils.py:1707]  params/params/decoder/layers/self_attention/out/kernel
    Shape:     float32[16,16,128,2048]
    Logical:   P('heads', 'layers', 'kv', 'embed')
    Physical:  (None, None, None, 'fsdp')
I0423 07:35:00.533871 137687193626432 maxtext_utils.py:1707]  params/params/decoder/layers/self_attention/query/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   P('embed', 'layers', 'q_heads', 'kv')
    Physical:  ('fsdp', None, None, None)
I0423 07:35:00.533907 137687193626432 maxtext_utils.py:1707]  params/params/decoder/layers/self_attention/value/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   P('embed', 'layers', 'kv_heads', 'kv_head_dim')
    Physical:  ('fsdp', None, None, None)
I0423 07:35:00.533958 137687193626432 maxtext_utils.py:1707]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)

I0423 07:35:00.534006 137687193626432 maxtext_utils.py:1707]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')
I0423 07:35:00.556779 137687193626432 gradient_accumulation.py:68] gradient_accumulation/inputs Logical: float32[2048]............................................... Unknown.
I0423 07:35:00.556844 137687193626432 gradient_accumulation.py:68] gradient_accumulation/inputs Physical: float32[2048]............................................... (None,).
I0423 07:35:00.571748 137687193626432 gradient_accumulation.py:68] gradient_accumulation/inputs Logical: float32[2048,16,7168]....................................... Unknown.
I0423 07:35:00.571807 137687193626432 gradient_accumulation.py:68] gradient_accumulation/inputs Physical: float32[2048,16,7168]....................................... ('fsdp', None, None).
I0423 07:35:00.601384 137687193626432 gradient_accumulation.py:68] gradient_accumulation/inputs Logical: float32[7168,16,2048]....................................... Unknown.
I0423 07:35:00.601450 137687193626432 gradient_accumulation.py:68] gradient_accumulation/inputs Physical: float32[7168,16,2048]....................................... (None, None, 'fsdp').
I0423 07:35:00.616424 137687193626432 gradient_accumulation.py:68] gradient_accumulation/inputs Logical: float32[2048,16]............................................ Unknown.
I0423 07:35:00.616477 137687193626432 gradient_accumulation.py:68] gradient_accumulation/inputs Physical: float32[2048,16]............................................ (None, None).
I0423 07:35:00.646317 137687193626432 gradient_accumulation.py:68] gradient_accumulation/inputs Logical: float32[2048,16,16,128]..................................... Unknown.
I0423 07:35:00.646381 137687193626432 gradient_accumulation.py:68] gradient_accumulation/inputs Physical: float32[2048,16,16,128]..................................... ('fsdp', None, None, None).
I0423 07:35:00.661214 137687193626432 gradient_accumulation.py:68] gradient_accumulation/inputs Logical: float32[16,16,128,2048]..................................... Unknown.
I0423 07:35:00.661273 137687193626432 gradient_accumulation.py:68] gradient_accumulation/inputs Physical: float32[16,16,128,2048]..................................... (None, None, None, 'fsdp').
I0423 07:35:00.705718 137687193626432 gradient_accumulation.py:68] gradient_accumulation/inputs Logical: float32[2048,32000]......................................... Unknown.
I0423 07:35:00.705785 137687193626432 gradient_accumulation.py:68] gradient_accumulation/inputs Physical: float32[2048,32000]......................................... ('fsdp', None).
I0423 07:35:00.720642 137687193626432 gradient_accumulation.py:68] gradient_accumulation/inputs Logical: float32[32000,2048]......................................... Unknown.
I0423 07:35:00.720705 137687193626432 gradient_accumulation.py:68] gradient_accumulation/inputs Physical: float32[32000,2048]......................................... (None, 'fsdp').
I0423 07:35:01.395866 137687193626432 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0423 07:35:01.395960 137687193626432 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0423 07:35:01.411646 137687193626432 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0423 07:35:01.411716 137687193626432 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0423 07:35:12.661813 137687193626432 max_utils.py:791] Total memory size: 1.7 GB, Output size: 0.4 GB, Temp size: 1.3 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB.
I0423 07:35:12.662583 137687193626432 metric_logger.py:301] number parameters: 1.104 billion
I0423 07:35:14.984833 137687193626432 checkpointing.py:772] Waiting for step 0 to finish before checkpoint...
I0423 07:35:26.009070 137687193626432 checkpointing.py:776] Waited 11.024211645126343 seconds for step 0 to finish before starting checkpointing.
I0423 07:35:26.011588 137687193626432 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0423 07:35:26.013336 137687193626432 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 0
I0423 07:35:26.014776 137687193626432 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_06_grad_accum/checkpoints/0.
I0423 07:35:26.777310 137687193626432 signaling_client.py:364] Using JaxDistributedSignalingClient
I0423 07:35:26.778301 137687193626432 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0423 07:35:26.778358 137687193626432 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 07:35:27.057792 137687193626432 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.280558s
I0423 07:35:27.057970 137687193626432 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 5.389 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2862355709075928 s) (per-host)
I0423 07:35:27.058030 137687193626432 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.286304s (batch_requests_ready=0.002290s, total_serialization_initiated=0.283937s, others=0.000077s)
I0423 07:35:27.058125 137687193626432 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.290375s (all_items=0.000017s, per_item={'items': '0.00001740'}, temp_paths=0.290358)
I0423 07:35:27.058930 137687193626432 event_tracking.py:125] [process=5] [async] Finished blocking save in 1.05 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_06_grad_accum/checkpoints/0.
I0423 07:35:27.059272 137557800212224 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 07:55:27.059229
I0423 07:35:27.061184 137687193626432 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0423 07:35:27.061425 137555605309184 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save.
I0423 07:35:27.061575 137687193626432 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_06_grad_accum/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776929726.0115697, 'wait_for_prev_duration_secs': 6.0558319091796875e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776929726.013374, 'checkpointer_blocking_duration_secs': 1.0459988117218018, 'get_old_steps_start_time': 1776929727.059398, 'get_old_steps_duration_secs': 3.075599670410156e-05, 'checkpoint_manager_blocking_start_time': 1776929726.009592, 'checkpoint_manager_blocking_duration_secs': 1.0519473552703857}
I0423 07:35:27.061693 137687193626432 checkpointing.py:408] Started an asynchronous checkpoint save for step 0
I0423 07:35:27.061744 137687193626432 max_utils.py:750] 
Memstats: After params initialized:
I0423 07:35:27.061793 137687193626432 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_18(process=5,(2,4,0,0))
I0423 07:35:27.061826 137687193626432 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_19(process=5,(3,4,0,0))
I0423 07:35:27.061855 137687193626432 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_22(process=5,(2,5,0,0))
I0423 07:35:27.061881 137687193626432 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_23(process=5,(3,5,0,0))
I0423 07:35:27.374334 137687193626432 metric_logger.py:196] completed step: 0, seconds: 2.322, TFLOP/s/device: 23.404, Tokens/s/device: 3527.770, total_weights: 262144, loss: 10.877, lm_loss: 10.877, perplexity: 52959.059
I0423 07:35:27.978063 137687193626432 metric_logger.py:196] completed step: 1, seconds: 12.388, TFLOP/s/device: 4.387, Tokens/s/device: 661.284, total_weights: 262144, loss: 10.877, lm_loss: 10.877, perplexity: 52959.059
I0423 07:35:28.556168 137687193626432 metric_logger.py:196] completed step: 2, seconds: 0.026, TFLOP/s/device: 2115.551, Tokens/s/device: 318878.941, total_weights: 262144, loss: 10.563, lm_loss: 10.563, perplexity: 38662.707
I0423 07:35:29.134636 137687193626432 metric_logger.py:196] completed step: 3, seconds: 0.584, TFLOP/s/device: 93.070, Tokens/s/device: 14028.574, total_weights: 262144, loss: 10.272, lm_loss: 10.272, perplexity: 28909.668
I0423 07:35:29.924299    2555 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0423 07:35:30.291373 137687193626432 metric_logger.py:196] completed step: 4, seconds: 0.578, TFLOP/s/device: 94.008, Tokens/s/device: 14169.970, total_weights: 262144, loss: 10.022, lm_loss: 10.022, perplexity: 22524.992
I0423 07:35:30.297863 137687193626432 metric_logger.py:196] completed step: 5, seconds: 0.578, TFLOP/s/device: 93.972, Tokens/s/device: 14164.531, total_weights: 262144, loss: 9.820, lm_loss: 9.820, perplexity: 18401.865
I0423 07:35:32.828964 137555613701888 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_06_grad_accum/checkpoints/0/items/array_metadatas/process_5
I0423 07:36:05.385525 137557800212224 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 40.908 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 38.61375308036804 s) (per-host)
I0423 07:36:05.385648 137557800212224 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 38.325744s.
I0423 07:36:12.760230 137557800212224 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 45.700310s.
I0423 07:36:12.760536 137555605309184 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save.
I0423 07:36:12.760678 137555605309184 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save.
I0423 07:36:12.760749 137555605309184 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0423 07:36:12.763150 137555605309184 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0423 07:36:17.421472 137687193626432 metric_logger.py:196] completed step: 6, seconds: 1.158, TFLOP/s/device: 46.941, Tokens/s/device: 7075.512, total_weights: 262144, loss: 9.667, lm_loss: 9.667, perplexity: 15787.604
I0423 07:36:17.999947 137687193626432 metric_logger.py:196] completed step: 7, seconds: 46.546, TFLOP/s/device: 1.168, Tokens/s/device: 175.998, total_weights: 262144, loss: 9.561, lm_loss: 9.561, perplexity: 14203.827
I0423 07:36:18.577988 137687193626432 metric_logger.py:196] completed step: 8, seconds: 0.583, TFLOP/s/device: 93.212, Tokens/s/device: 14049.988, total_weights: 262144, loss: 9.496, lm_loss: 9.496, perplexity: 13302.920
I0423 07:36:19.155470 137687193626432 checkpointing.py:772] Waiting for step 9 to finish before checkpoint...
I0423 07:36:19.156188 137687193626432 checkpointing.py:776] Waited 0.0007278919219970703 seconds for step 9 to finish before starting checkpointing.
I0423 07:36:19.158305 137687193626432 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0423 07:36:19.160223 137687193626432 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 9
I0423 07:36:19.161946 137687193626432 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_06_grad_accum/checkpoints/9.
I0423 07:36:19.866107 137687193626432 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0423 07:36:19.866204 137687193626432 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 07:36:19.899484 137687193626432 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.034268s
I0423 07:36:19.899667 137687193626432 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 40.763 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.037842750549316406 s) (per-host)
I0423 07:36:19.899723 137687193626432 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.037920s (batch_requests_ready=0.001724s, total_serialization_initiated=0.036111s, others=0.000085s)
I0423 07:36:19.899820 137687193626432 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.042134s (all_items=0.000015s, per_item={'items': '0.00001526'}, temp_paths=0.042119)
I0423 07:36:19.900455 137687193626432 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_06_grad_accum/checkpoints/9.
I0423 07:36:19.900744 137557266396928 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 07:56:19.900702
I0423 07:36:19.902689 137687193626432 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0423 07:36:19.902934 137563700455168 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save.
I0423 07:36:19.903089 137687193626432 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260423_071538/linen_xpk_main_20260423_071538_06_grad_accum/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776929779.1582735, 'wait_for_prev_duration_secs': 7.534027099609375e-05, 'time_between_consecutive_saves_sec': 6.3950817584991455, 'checkpointer_blocking_start_time': 1776929779.1603103, 'checkpointer_blocking_duration_secs': 0.7405805587768555, 'get_old_steps_start_time': 1776929779.9009132, 'get_old_steps_duration_secs': 2.6702880859375e-05, 'checkpoint_manager_blocking_start_time': 1776929779.156493, 'checkpoint_manager_blocking_duration_secs': 0.7465634346008301}
I0423 07:36:19.903190 137687193626432 checkpointing.py:408] Started an asynchronous checkpoint save for step 9
I0423 07:36:19.903239 137687193626432 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0423 07:36:25.885803 137557800212224 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_06_grad_accum/checkpoints/9/items/array_metadatas/process_5
I0423 07:37:02.649752 137557266396928 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 36.917 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.78790044784546 s) (per-host)
I0423 07:37:02.649880 137557266396928 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.749018s.
I0423 07:37:10.678960 137557266396928 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 50.778084s.
I0423 07:37:10.679266 137563700455168 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save.
I0423 07:37:10.679382 137563700455168 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save.
I0423 07:37:10.679427 137563700455168 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0423 07:37:10.681847 137563700455168 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0423 07:37:10.682046 137687193626432 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 07:37:10.682198 137687193626432 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0423 07:37:10.683190 137687193626432 metric_logger.py:196] completed step: 9, seconds: 0.578, TFLOP/s/device: 93.952, Tokens/s/device: 14161.397, total_weights: 262144, loss: 9.457, lm_loss: 9.457, perplexity: 12802.546
Per train step:
 Total TFLOPs: 54.35 
 split as 93.93% learnable weight flops and 6.07% attention flops
XPK End: Thu Apr 23 07:37:20 UTC 2026
EXIT_CODE=0
test/pipeline-scan-nnx  ·  5b21b66fc  ·  test_pipeline_scan_nnx_20260423_211617  ·  full log 
XPK Start: Thu Apr 23 21:30:46 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 21:31:11.380048: 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 21:31:11.590804 139905136797504 max_utils.py:273] Attempting to initialize the jax distributed system...
I0423 21:31:20.630147 139905136797504 distributed.py:149] Starting JAX distributed service on [::]:8482
I0423 21:31:20.632491 139905136797504 distributed.py:172] Connecting to JAX distributed service on mt-06-grad-accum-5f6a9-slice-job-0-0.mt-06-grad-accum-5f6a9:8482
I0423 21:31:22.154701 139905136797504 max_utils.py:284] Jax distributed system initialized!
I0423 21:31:28.207206 139905136797504 max_utils.py:800] System Information: Jax Version: 0.9.2
I0423 21:31:28.207315 139905136797504 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0423 21:31:28.207355 139905136797504 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 21:31:28.207387 139905136797504 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0423 21:31:28.912571 139905136797504 maxtext_utils.py:1565] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0423 21:31:28.912872 139905136797504 checkpointing.py:677] Setting up checkpoint logger...
I0423 21:31:28.912928 139905136797504 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0423 21:31:28.912976 139905136797504 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0423 21:31:28.913322 139905136797504 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 0x7f3db1d126c0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0423 21:31:31.945507 139905136797504 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0423 21:31:31.945764 139905136797504 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 0x7f291c629790>}, handler_registry=None
I0423 21:31:31.946002 139905136797504 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7f291c629790>` 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 21:31:31.946055 139905136797504 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7f291c62aed0>` 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 21:31:31.946089 139905136797504 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 0x7f291c629790>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7f291c629790>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7f291c62aed0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7f291c62aed0>}).
I0423 21:31:31.946408 139905136797504 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0423 21:31:31.946479 139905136797504 async_checkpointer.py:192] [process=5][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7f291c45f560> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0423 21:31:33.060739 139905136797504 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_06_grad_accum/checkpoints
I0423 21:31:33.504131 139905136797504 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_06_grad_accum/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7f291c629e80>
I0423 21:31:33.504320 139905136797504 checkpointing.py:301] Checkpoint manager created!
I0423 21:31:35.208038 139905136797504 nnx_wrappers.py:453] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0423 21:31:35.208157 139905136797504 nnx_wrappers.py:453] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0423 21:31:35.589343 139905136797504 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0423 21:31:35.589437 139905136797504 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0423 21:31:35.606349 139905136797504 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0423 21:31:35.606407 139905136797504 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0423 21:31:35.630476 139905136797504 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0423 21:31:35.630542 139905136797504 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0423 21:31:35.647398 139905136797504 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0423 21:31:35.647464 139905136797504 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0423 21:31:35.664317 139905136797504 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0423 21:31:35.664379 139905136797504 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0423 21:31:35.689644 139905136797504 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0423 21:31:35.689721 139905136797504 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0423 21:31:35.711184 139905136797504 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0423 21:31:35.711254 139905136797504 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0423 21:31:35.924023 139905136797504 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0423 21:31:35.924139 139905136797504 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0423 21:31:37.364609 139905136797504 maxtext_utils.py:1668]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0423 21:31:37.364749 139905136797504 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)
I0423 21:31:37.364804 139905136797504 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)
I0423 21:31:37.364864 139905136797504 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')
I0423 21:31:37.364921 139905136797504 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)
I0423 21:31:37.364965 139905136797504 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)
I0423 21:31:37.365018 139905136797504 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)
I0423 21:31:37.365070 139905136797504 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')
I0423 21:31:37.365110 139905136797504 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)
I0423 21:31:37.365147 139905136797504 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)
I0423 21:31:37.365195 139905136797504 maxtext_utils.py:1668]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)

I0423 21:31:37.365243 139905136797504 maxtext_utils.py:1668]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')
I0423 21:31:37.389417 139905136797504 gradient_accumulation.py:68] gradient_accumulation/inputs Logical: float32[2048]............................................... Unknown.
I0423 21:31:37.389484 139905136797504 gradient_accumulation.py:68] gradient_accumulation/inputs Physical: float32[2048]............................................... (None,).
I0423 21:31:37.404699 139905136797504 gradient_accumulation.py:68] gradient_accumulation/inputs Logical: float32[2048,16,7168]....................................... Unknown.
I0423 21:31:37.404758 139905136797504 gradient_accumulation.py:68] gradient_accumulation/inputs Physical: float32[2048,16,7168]....................................... ('fsdp', None, None).
I0423 21:31:37.434854 139905136797504 gradient_accumulation.py:68] gradient_accumulation/inputs Logical: float32[7168,16,2048]....................................... Unknown.
I0423 21:31:37.434930 139905136797504 gradient_accumulation.py:68] gradient_accumulation/inputs Physical: float32[7168,16,2048]....................................... (None, None, 'fsdp').
I0423 21:31:37.450099 139905136797504 gradient_accumulation.py:68] gradient_accumulation/inputs Logical: float32[2048,16]............................................ Unknown.
I0423 21:31:37.450153 139905136797504 gradient_accumulation.py:68] gradient_accumulation/inputs Physical: float32[2048,16]............................................ (None, None).
I0423 21:31:37.480372 139905136797504 gradient_accumulation.py:68] gradient_accumulation/inputs Logical: float32[2048,16,16,128]..................................... Unknown.
I0423 21:31:37.480437 139905136797504 gradient_accumulation.py:68] gradient_accumulation/inputs Physical: float32[2048,16,16,128]..................................... ('fsdp', None, None, None).
I0423 21:31:37.495547 139905136797504 gradient_accumulation.py:68] gradient_accumulation/inputs Logical: float32[16,16,128,2048]..................................... Unknown.
I0423 21:31:37.495606 139905136797504 gradient_accumulation.py:68] gradient_accumulation/inputs Physical: float32[16,16,128,2048]..................................... (None, None, None, 'fsdp').
I0423 21:31:37.540843 139905136797504 gradient_accumulation.py:68] gradient_accumulation/inputs Logical: float32[2048,32000]......................................... Unknown.
I0423 21:31:37.540912 139905136797504 gradient_accumulation.py:68] gradient_accumulation/inputs Physical: float32[2048,32000]......................................... ('fsdp', None).
I0423 21:31:37.556108 139905136797504 gradient_accumulation.py:68] gradient_accumulation/inputs Logical: float32[32000,2048]......................................... Unknown.
I0423 21:31:37.556165 139905136797504 gradient_accumulation.py:68] gradient_accumulation/inputs Physical: float32[32000,2048]......................................... (None, 'fsdp').
I0423 21:31:38.250113 139905136797504 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0423 21:31:38.250211 139905136797504 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0423 21:31:38.266068 139905136797504 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0423 21:31:38.266131 139905136797504 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0423 21:31:49.729145 139905136797504 max_utils.py:791] Total memory size: 1.7 GB, Output size: 0.4 GB, Temp size: 1.3 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB.
I0423 21:31:49.729956 139905136797504 metric_logger.py:301] number parameters: 1.104 billion
I0423 21:31:52.009054 139905136797504 checkpointing.py:772] Waiting for step 0 to finish before checkpoint...
I0423 21:32:02.910559 139905136797504 checkpointing.py:776] Waited 10.901487350463867 seconds for step 0 to finish before starting checkpointing.
I0423 21:32:02.912828 139905136797504 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0423 21:32:02.915251 139905136797504 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 0
I0423 21:32:02.916681 139905136797504 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_06_grad_accum/checkpoints/0.
I0423 21:32:03.244125 139905136797504 signaling_client.py:364] Using JaxDistributedSignalingClient
I0423 21:32:03.245030 139905136797504 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0423 21:32:03.245088 139905136797504 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 21:32:03.517172 139905136797504 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.273119s
I0423 21:32:03.517351 139905136797504 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 5.536 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.27863383293151855 s) (per-host)
I0423 21:32:03.517405 139905136797504 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.278698s (batch_requests_ready=0.002213s, total_serialization_initiated=0.276412s, others=0.000073s)
I0423 21:32:03.517495 139905136797504 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.282810s (all_items=0.000018s, per_item={'items': '0.00001764'}, temp_paths=0.282792)
I0423 21:32:03.518295 139905136797504 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_06_grad_accum/checkpoints/0.
I0423 21:32:03.518629 139777613485824 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 21:52:03.518593
I0423 21:32:03.536626 139905136797504 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0423 21:32:03.536918 139775434594048 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save.
I0423 21:32:03.537074 139905136797504 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_06_grad_accum/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776979922.9128096, 'wait_for_prev_duration_secs': 6.151199340820312e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776979922.915291, 'checkpointer_blocking_duration_secs': 0.6034979820251465, 'get_old_steps_start_time': 1776979923.518817, 'get_old_steps_duration_secs': 3.0994415283203125e-05, 'checkpoint_manager_blocking_start_time': 1776979922.9110937, 'checkpoint_manager_blocking_duration_secs': 0.625941276550293}
I0423 21:32:03.537184 139905136797504 checkpointing.py:408] Started an asynchronous checkpoint save for step 0
I0423 21:32:03.537236 139905136797504 max_utils.py:750] 
Memstats: After params initialized:
I0423 21:32:03.537286 139905136797504 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_18(process=5,(2,4,0,0))
I0423 21:32:03.537322 139905136797504 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_19(process=5,(3,4,0,0))
I0423 21:32:03.537349 139905136797504 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_22(process=5,(2,5,0,0))
I0423 21:32:03.537373 139905136797504 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_23(process=5,(3,5,0,0))
I0423 21:32:03.850090 139905136797504 metric_logger.py:196] completed step: 0, seconds: 2.279, TFLOP/s/device: 23.848, Tokens/s/device: 3594.605, total_weights: 262144, loss: 10.877, lm_loss: 10.877, perplexity: 52959.059
I0423 21:32:04.475906 139905136797504 metric_logger.py:196] completed step: 1, seconds: 11.840, TFLOP/s/device: 4.590, Tokens/s/device: 691.919, total_weights: 262144, loss: 10.877, lm_loss: 10.877, perplexity: 52959.059
I0423 21:32:05.054287 139905136797504 metric_logger.py:196] completed step: 2, seconds: 0.048, TFLOP/s/device: 1136.546, Tokens/s/device: 171312.658, total_weights: 262144, loss: 10.563, lm_loss: 10.563, perplexity: 38662.707
I0423 21:32:05.632310 139905136797504 metric_logger.py:196] completed step: 3, seconds: 0.584, TFLOP/s/device: 93.071, Tokens/s/device: 14028.622, total_weights: 262144, loss: 10.272, lm_loss: 10.272, perplexity: 28909.668
I0423 21:32:06.486722    2580 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0423 21:32:06.788964 139905136797504 metric_logger.py:196] completed step: 4, seconds: 0.578, TFLOP/s/device: 93.972, Tokens/s/device: 14164.458, total_weights: 262144, loss: 10.022, lm_loss: 10.022, perplexity: 22524.992
I0423 21:32:06.796337 139905136797504 metric_logger.py:196] completed step: 5, seconds: 0.578, TFLOP/s/device: 94.027, Tokens/s/device: 14172.814, total_weights: 262144, loss: 9.820, lm_loss: 9.820, perplexity: 18401.865
I0423 21:32:08.520985 139775990294272 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_06_grad_accum/checkpoints/0/items/array_metadatas/process_5
I0423 21:32:40.870269 139777613485824 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 41.975 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 37.63151264190674 s) (per-host)
I0423 21:32:40.870376 139777613485824 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 37.351628s.
I0423 21:32:51.676515 139777613485824 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 48.157752s.
I0423 21:32:51.676820 139775434594048 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save.
I0423 21:32:51.676993 139775434594048 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save.
I0423 21:32:51.677049 139775434594048 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0423 21:32:51.678596 139775434594048 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0423 21:32:53.009690 139905136797504 metric_logger.py:196] completed step: 6, seconds: 1.158, TFLOP/s/device: 46.921, Tokens/s/device: 7072.391, total_weights: 262144, loss: 9.667, lm_loss: 9.667, perplexity: 15787.604
I0423 21:32:53.588037 139905136797504 metric_logger.py:196] completed step: 7, seconds: 45.636, TFLOP/s/device: 1.191, Tokens/s/device: 179.508, total_weights: 262144, loss: 9.561, lm_loss: 9.561, perplexity: 14203.827
I0423 21:32:54.166002 139905136797504 metric_logger.py:196] completed step: 8, seconds: 0.583, TFLOP/s/device: 93.238, Tokens/s/device: 14053.796, total_weights: 262144, loss: 9.496, lm_loss: 9.496, perplexity: 13302.920
I0423 21:32:54.743716 139905136797504 checkpointing.py:772] Waiting for step 9 to finish before checkpoint...
I0423 21:32:54.744292 139905136797504 checkpointing.py:776] Waited 0.0005981922149658203 seconds for step 9 to finish before starting checkpointing.
I0423 21:32:54.746425 139905136797504 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0423 21:32:54.748100 139905136797504 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 9
I0423 21:32:54.749527 139905136797504 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_06_grad_accum/checkpoints/9.
I0423 21:32:55.039576 139905136797504 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0423 21:32:55.039684 139905136797504 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 21:32:55.079426 139905136797504 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.040839s
I0423 21:32:55.079597 139905136797504 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 34.802 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.044324636459350586 s) (per-host)
I0423 21:32:55.079662 139905136797504 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.044387s (batch_requests_ready=0.001671s, total_serialization_initiated=0.042647s, others=0.000068s)
I0423 21:32:55.079762 139905136797504 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.048427s (all_items=0.000015s, per_item={'items': '0.00001550'}, temp_paths=0.048411)
I0423 21:32:55.080413 139905136797504 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.33 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_06_grad_accum/checkpoints/9.
I0423 21:32:55.080830 139775434594048 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 21:52:55.080797
I0423 21:32:55.082864 139905136797504 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0423 21:32:55.083151 139771154249472 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save.
I0423 21:32:55.083308 139905136797504 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_06_grad_accum/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776979974.7463913, 'wait_for_prev_duration_secs': 7.462501525878906e-05, 'time_between_consecutive_saves_sec': 3.067755937576294, 'checkpointer_blocking_start_time': 1776979974.748148, 'checkpointer_blocking_duration_secs': 0.33278489112854004, 'get_old_steps_start_time': 1776979975.0809538, 'get_old_steps_duration_secs': 2.5510787963867188e-05, 'checkpoint_manager_blocking_start_time': 1776979974.7445145, 'checkpoint_manager_blocking_duration_secs': 0.3387601375579834}
I0423 21:32:55.083411 139905136797504 checkpointing.py:408] Started an asynchronous checkpoint save for step 9
I0423 21:32:55.083454 139905136797504 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0423 21:33:00.219472 139776556529408 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_06_grad_accum/checkpoints/9/items/array_metadatas/process_5
I0423 21:33:37.453805 139775434594048 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 37.238 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.41849660873413 s) (per-host)
I0423 21:33:37.453933 139775434594048 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.372541s.
I0423 21:33:43.005338 139775434594048 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 47.923931s.
I0423 21:33:43.005634 139771154249472 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save.
I0423 21:33:43.005770 139771154249472 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save.
I0423 21:33:43.005818 139771154249472 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0423 21:33:43.007123 139771154249472 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0423 21:33:43.007316 139905136797504 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 21:33:43.007474 139905136797504 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0423 21:33:43.008553 139905136797504 metric_logger.py:196] completed step: 9, seconds: 0.578, TFLOP/s/device: 93.973, Tokens/s/device: 14164.678, total_weights: 262144, loss: 9.457, lm_loss: 9.457, perplexity: 12802.546
Per train step:
 Total TFLOPs: 54.35 
 split as 93.93% learnable weight flops and 6.07% attention flops
XPK End: Thu Apr 23 21:33:51 UTC 2026
EXIT_CODE=0