MaxView

Timing Test Reference Updates
‹ 08_checkpoint_async_true_resumeCase: 08_checkpoint_async_true_save09_pdb_lt_1 ›

Metrics: main (b117f50cf) vs test/pipeline-scan-nnx (5b21b66fc)

Metricmain  b117f50cftest/pipeline-scan-nnx  5b21b66fcDiff (test/pipeline-scan-nnx − main)
Parameters1.104 billion1.104 billion—
Final loss7.18107.18100
TFLOP/s92.16992.283+0.114
Tok/s13892.713909.9+17.267
Avg s/step7.5147.690+0.176
Memory %1.381.380
JAX0.9.20.9.2—

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

main  ·  b117f50cf  ·  main_20260424_070227  ·  full log 
XPK Start: Fri Apr 24 07:25:49 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. 
2026-04-24 07:26:14.714987: 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)
I0424 07:26:14.926568 132182297855808 max_utils.py:273] Attempting to initialize the jax distributed system...
I0424 07:26:23.966484 132182297855808 distributed.py:149] Starting JAX distributed service on [::]:8482
I0424 07:26:23.968842 132182297855808 distributed.py:172] Connecting to JAX distributed service on mt-08-checkpoint-async--qpjns-slice-job-0-0.mt-08-checkpoint-async--qpjns:8482
I0424 07:26:24.820416 132182297855808 max_utils.py:284] Jax distributed system initialized!
I0424 07:26:30.858678 132182297855808 max_utils.py:800] System Information: Jax Version: 0.9.2
I0424 07:26:30.858782 132182297855808 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0424 07:26:30.858822 132182297855808 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
I0424 07:26:30.858859 132182297855808 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0424 07:26:31.551337 132182297855808 maxtext_utils.py:1604] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0424 07:26:31.551615 132182297855808 checkpointing.py:677] Setting up checkpoint logger...
I0424 07:26:31.551687 132182297855808 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0424 07:26:31.551733 132182297855808 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0424 07:26:31.552076 132182297855808 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 0x78377b914f80>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0424 07:26:34.470185 132182297855808 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0424 07:26:34.470418 132182297855808 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 0x782424048380>}, handler_registry=None
I0424 07:26:34.470666 132182297855808 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x782424048380>` 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`.
I0424 07:26:34.470715 132182297855808 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x78235c4655b0>` 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`.
I0424 07:26:34.470749 132182297855808 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 0x782424048380>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x782424048380>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x78235c4655b0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x78235c4655b0>}).
I0424 07:26:34.471084 132182297855808 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0424 07:26:34.471151 132182297855808 async_checkpointer.py:192] [process=5][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x78231c7e56c0> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0424 07:26:35.188666 132182297855808 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_08_checkpoint_async_true/checkpoints
I0424 07:26:35.417847 132182297855808 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=5), 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_20260424_070227/linen_xpk_main_20260424_070227_08_checkpoint_async_true/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x78235c3023f0>
I0424 07:26:35.418023 132182297855808 checkpointing.py:301] Checkpoint manager created!
I0424 07:26:36.350642 132182297855808 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0424 07:26:36.350768 132182297855808 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0424 07:26:36.727665 132182297855808 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0424 07:26:36.727756 132182297855808 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0424 07:26:36.744346 132182297855808 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0424 07:26:36.744404 132182297855808 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0424 07:26:36.768352 132182297855808 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0424 07:26:36.768418 132182297855808 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0424 07:26:36.784975 132182297855808 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0424 07:26:36.785037 132182297855808 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0424 07:26:36.801455 132182297855808 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0424 07:26:36.801525 132182297855808 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0424 07:26:36.826418 132182297855808 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0424 07:26:36.826486 132182297855808 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0424 07:26:36.847548 132182297855808 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0424 07:26:36.847616 132182297855808 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0424 07:26:37.056057 132182297855808 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0424 07:26:37.056163 132182297855808 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0424 07:26:38.499033 132182297855808 maxtext_utils.py:1707]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0424 07:26:38.499160 132182297855808 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)
I0424 07:26:38.499213 132182297855808 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)
I0424 07:26:38.499270 132182297855808 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')
I0424 07:26:38.499320 132182297855808 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)
I0424 07:26:38.499358 132182297855808 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)
I0424 07:26:38.499413 132182297855808 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)
I0424 07:26:38.499464 132182297855808 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')
I0424 07:26:38.499504 132182297855808 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)
I0424 07:26:38.499538 132182297855808 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)
I0424 07:26:38.499584 132182297855808 maxtext_utils.py:1707]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)

I0424 07:26:38.499629 132182297855808 maxtext_utils.py:1707]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')
I0424 07:26:38.995270 132182297855808 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0424 07:26:38.995367 132182297855808 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0424 07:26:39.012314 132182297855808 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0424 07:26:39.012374 132182297855808 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0424 07:26:50.111450 132182297855808 max_utils.py:791] Total memory size: 1.5 GB, Output size: 0.4 GB, Temp size: 1.1 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB.
I0424 07:26:50.112218 132182297855808 metric_logger.py:301] number parameters: 1.104 billion
I0424 07:27:01.364001 132182297855808 checkpointing.py:772] Waiting for step 0 to finish before checkpoint...
I0424 07:27:01.655081 132182297855808 checkpointing.py:776] Waited 0.291057825088501 seconds for step 0 to finish before starting checkpointing.
I0424 07:27:01.657471 132182297855808 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0424 07:27:01.659106 132182297855808 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 0
I0424 07:27:01.660540 132182297855808 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_08_checkpoint_async_true/checkpoints/0.
I0424 07:27:02.116543 132182297855808 signaling_client.py:364] Using JaxDistributedSignalingClient
I0424 07:27:02.117486 132182297855808 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0424 07:27:02.117541 132182297855808 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
I0424 07:27:02.390022 132182297855808 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.273550s
I0424 07:27:02.390195 132182297855808 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 5.526 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.27915406227111816 s) (per-host)
I0424 07:27:02.390246 132182297855808 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.279215s (batch_requests_ready=0.002474s, total_serialization_initiated=0.276672s, others=0.000069s)
I0424 07:27:02.390341 132182297855808 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.283264s (all_items=0.000018s, per_item={'items': '0.00001788'}, temp_paths=0.283246)
I0424 07:27:02.391202 132182297855808 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.73 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_08_checkpoint_async_true/checkpoints/0.
I0424 07:27:02.391535 132052924151552 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-24 07:47:02.391498
I0424 07:27:02.401011 132182297855808 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0424 07:27:02.401299 132050237515520 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save.
I0424 07:27:02.401455 132182297855808 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_08_checkpoint_async_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777015621.6574535, 'wait_for_prev_duration_secs': 5.817413330078125e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777015621.6591444, 'checkpointer_blocking_duration_secs': 0.7325608730316162, 'get_old_steps_start_time': 1777015622.3917296, 'get_old_steps_duration_secs': 3.170967102050781e-05, 'checkpoint_manager_blocking_start_time': 1777015621.655488, 'checkpoint_manager_blocking_duration_secs': 0.7459287643432617}
I0424 07:27:02.401562 132182297855808 checkpointing.py:408] Started an asynchronous checkpoint save for step 0
I0424 07:27:02.401611 132182297855808 max_utils.py:750] 
Memstats: After params initialized:
I0424 07:27:02.401673 132182297855808 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_18(process=5,(2,4,0,0))
I0424 07:27:02.401708 132182297855808 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_19(process=5,(3,4,0,0))
I0424 07:27:02.401735 132182297855808 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_22(process=5,(2,5,0,0))
I0424 07:27:02.401761 132182297855808 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_23(process=5,(3,5,0,0))
I0424 07:27:02.712519 132182297855808 metric_logger.py:196] completed step: 0, seconds: 11.252, TFLOP/s/device: 1.208, Tokens/s/device: 182.017, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0424 07:27:02.902503 132182297855808 metric_logger.py:196] completed step: 1, seconds: 1.347, TFLOP/s/device: 10.087, Tokens/s/device: 1520.399, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0424 07:27:03.325387 132182297855808 metric_logger.py:196] completed step: 2, seconds: 0.043, TFLOP/s/device: 318.745, Tokens/s/device: 48044.667, total_weights: 65536, loss: 10.560, lm_loss: 10.560, perplexity: 38547.719
I0424 07:27:03.472686 132182297855808 metric_logger.py:196] completed step: 3, seconds: 0.424, TFLOP/s/device: 32.073, Tokens/s/device: 4834.350, total_weights: 65536, loss: 9.980, lm_loss: 9.980, perplexity: 21590.506
I0424 07:27:03.477046 132182297855808 checkpointing.py:772] Waiting for step 5 to finish before checkpoint...
I0424 07:27:03.766779 132182297855808 checkpointing.py:776] Waited 0.28969550132751465 seconds for step 5 to finish before starting checkpointing.
I0424 07:27:03.769819 132182297855808 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0424 07:27:05.473943    2850 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0424 07:27:07.692886 132050245908224 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_08_checkpoint_async_true/checkpoints/0/items/array_metadatas/process_5
I0424 07:27:39.457156 132052924151552 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 42.296 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 37.34607672691345 s) (per-host)
I0424 07:27:39.457284 132052924151552 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 37.065639s.
I0424 07:27:45.803025 132052924151552 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 43.411358s.
I0424 07:27:45.803399 132050237515520 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save.
I0424 07:27:45.803515 132050237515520 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save.
I0424 07:27:45.803565 132050237515520 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0424 07:27:45.805198 132050237515520 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0424 07:27:45.805411 132182297855808 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.
W0424 07:27:45.805541 132182297855808 checkpoint_manager.py:1452] Waiting for previous save to complete took 42.035719 seconds. If this number is high, consider checkpointing less frequently.
I0424 07:27:45.807333 132182297855808 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 5
I0424 07:27:45.809852 132182297855808 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_08_checkpoint_async_true/checkpoints/5.
I0424 07:27:46.096232 132182297855808 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0424 07:27:46.096329 132182297855808 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
I0424 07:27:46.137612 132182297855808 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.042288s
I0424 07:27:46.137782 132182297855808 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 33.705 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04576706886291504 s) (per-host)
I0424 07:27:46.137833 132182297855808 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.045827s (batch_requests_ready=0.001760s, total_serialization_initiated=0.043998s, others=0.000069s)
I0424 07:27:46.137919 132182297855808 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.050530s (all_items=0.000016s, per_item={'items': '0.00001597'}, temp_paths=0.050514)
I0424 07:27:46.138668 132182297855808 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.33 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_08_checkpoint_async_true/checkpoints/5.
I0424 07:27:46.138944 132050237515520 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-24 07:47:46.138920
I0424 07:27:46.140966 132182297855808 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=5] Starting CheckpointManager Save Finalize thread=save_finalize
I0424 07:27:46.141226 132028351633152 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save.
I0424 07:27:46.141383 132182297855808 standard_logger.py:34] {'step': 5, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_08_checkpoint_async_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777015623.7697906, 'wait_for_prev_duration_secs': 42.03571891784668, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777015665.8073726, 'checkpointer_blocking_duration_secs': 0.3316676616668701, 'get_old_steps_start_time': 1777015666.1390646, 'get_old_steps_duration_secs': 3.0040740966796875e-05, 'checkpoint_manager_blocking_start_time': 1777015623.7674108, 'checkpoint_manager_blocking_duration_secs': 42.373936891555786}
I0424 07:27:46.141495 132182297855808 checkpointing.py:408] Started an asynchronous checkpoint save for step 5
I0424 07:27:46.142325 132182297855808 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 89.049, Tokens/s/device: 13422.379, total_weights: 65536, loss: 9.460, lm_loss: 9.460, perplexity: 12840.355
I0424 07:27:46.148316 132182297855808 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.384, Tokens/s/device: 13925.152, total_weights: 65536, loss: 8.959, lm_loss: 8.959, perplexity: 7776.467
I0424 07:27:51.207192 132050245908224 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_08_checkpoint_async_true/checkpoints/5/items/array_metadatas/process_5
I0424 07:28:08.839838 132182297855808 metric_logger.py:196] completed step: 6, seconds: 42.670, TFLOP/s/device: 0.318, Tokens/s/device: 47.997, total_weights: 65536, loss: 8.469, lm_loss: 8.469, perplexity: 4762.740
I0424 07:28:08.987189 132182297855808 metric_logger.py:196] completed step: 7, seconds: 22.546, TFLOP/s/device: 0.603, Tokens/s/device: 90.838, total_weights: 65536, loss: 8.003, lm_loss: 8.003, perplexity: 2989.151
I0424 07:28:09.134722 132182297855808 metric_logger.py:196] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.386, Tokens/s/device: 13473.241, total_weights: 65536, loss: 7.572, lm_loss: 7.572, perplexity: 1943.098
I0424 07:28:09.281468 132182297855808 checkpointing.py:772] Waiting for step 9 to finish before checkpoint...
I0424 07:28:09.282068 132182297855808 checkpointing.py:776] Waited 0.000621795654296875 seconds for step 9 to finish before starting checkpointing.
I0424 07:28:09.284101 132182297855808 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=5][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0424 07:28:28.131081 132050237515520 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 37.575 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.0390191078186 s) (per-host)
I0424 07:28:28.131207 132050237515520 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.992188s.
I0424 07:28:34.376891 132050237515520 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 48.237857s.
I0424 07:28:34.377184 132028351633152 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save.
I0424 07:28:34.377297 132028351633152 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save.
I0424 07:28:34.377346 132028351633152 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=5] CheckpointManager Save Finalize is syncing with other hosts...
I0424 07:28:34.378902 132028351633152 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=5] CheckpointManager Save Finalize is done on all hosts.
I0424 07:28:34.379077 132182297855808 checkpoint_manager.py:2032] [process=5][thread=MainThread][step=5][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=5.
W0424 07:28:34.379205 132182297855808 checkpoint_manager.py:1452] Waiting for previous save to complete took 25.095105 seconds. If this number is high, consider checkpointing less frequently.
I0424 07:28:34.380578 132182297855808 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 9
I0424 07:28:34.382733 132182297855808 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_08_checkpoint_async_true/checkpoints/9.
I0424 07:28:34.687895 132182297855808 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0424 07:28:34.687988 132182297855808 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
I0424 07:28:34.727708 132182297855808 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.040644s
I0424 07:28:34.727870 132182297855808 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 34.972 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04410886764526367 s) (per-host)
I0424 07:28:34.727922 132182297855808 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.044171s (batch_requests_ready=0.001640s, total_serialization_initiated=0.042464s, others=0.000067s)
I0424 07:28:34.728013 132182297855808 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.048144s (all_items=0.000011s, per_item={'items': '0.00001121'}, temp_paths=0.048133)
I0424 07:28:34.728754 132182297855808 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.35 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_08_checkpoint_async_true/checkpoints/9.
I0424 07:28:34.729083 132028351633152 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-24 07:48:34.729046
I0424 07:28:34.731059 132182297855808 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0424 07:28:34.731337 132050245908224 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save.
I0424 07:28:34.731512 132182297855808 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_08_checkpoint_async_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777015689.2840707, 'wait_for_prev_duration_secs': 25.095104932785034, 'time_between_consecutive_saves_sec': 23.478833436965942, 'checkpointer_blocking_start_time': 1777015714.3806174, 'checkpointer_blocking_duration_secs': 0.34860992431640625, 'get_old_steps_start_time': 1777015714.7292442, 'get_old_steps_duration_secs': 2.47955322265625e-05, 'checkpoint_manager_blocking_start_time': 1777015689.2823067, 'checkpoint_manager_blocking_duration_secs': 25.449174165725708}
I0424 07:28:34.731620 132182297855808 checkpointing.py:408] Started an asynchronous checkpoint save for step 9
I0424 07:28:34.731680 132182297855808 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0424 07:28:40.238512 132050757601024 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_08_checkpoint_async_true/checkpoints/9/items/array_metadatas/process_5
I0424 07:29:17.489492 132028351633152 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 36.902 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.80569052696228 s) (per-host)
I0424 07:29:17.489612 132028351633152 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.760418s.
I0424 07:29:23.017033 132028351633152 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 48.287822s.
I0424 07:29:23.017348 132050245908224 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save.
I0424 07:29:23.017466 132050245908224 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save.
I0424 07:29:23.017507 132050245908224 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0424 07:29:23.018854 132050245908224 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0424 07:29:23.019030 132182297855808 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.
I0424 07:29:23.019180 132182297855808 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0424 07:29:23.020132 132182297855808 metric_logger.py:196] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.169, Tokens/s/device: 13892.658, total_weights: 65536, loss: 7.181, lm_loss: 7.181, perplexity: 1314.495
Per train step:
 Total TFLOPs: 13.59 
 split as 93.93% learnable weight flops and 6.07% attention flops
XPK End: Fri Apr 24 07:29:35 UTC 2026
EXIT_CODE=0
test/pipeline-scan-nnx  ·  5b21b66fc  ·  test_pipeline_scan_nnx_20260424_200834  ·  full log 
XPK Start: Fri Apr 24 20:30:14 UTC 2026
PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used.
`rope_parameters`'s factor field must be a float >= 1, got 40
`rope_parameters`'s beta_fast field must be a float, got 32
`rope_parameters`'s beta_slow field must be a float, got 1
DeepseekV32Config got `key=rope_scaling` in kwargs but hasn't set it as attribute. For RoPE standardization you need to set `self.rope_parameters` in model's config. 
2026-04-24 20:30:39.344334: 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)
I0424 20:30:39.557989 134839651915584 max_utils.py:273] Attempting to initialize the jax distributed system...
I0424 20:30:48.599485 134839651915584 distributed.py:149] Starting JAX distributed service on [::]:8482
I0424 20:30:48.602006 134839651915584 distributed.py:172] Connecting to JAX distributed service on mt-08-checkpoint-async--kadmy-slice-job-0-0.mt-08-checkpoint-async--kadmy:8482
I0424 20:30:49.664273 134839651915584 max_utils.py:284] Jax distributed system initialized!
I0424 20:30:55.980446 134839651915584 max_utils.py:800] System Information: Jax Version: 0.9.2
I0424 20:30:55.980552 134839651915584 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0424 20:30:55.980593 134839651915584 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
I0424 20:30:55.980630 134839651915584 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0424 20:30:56.680760 134839651915584 maxtext_utils.py:1565] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0424 20:30:56.681039 134839651915584 checkpointing.py:677] Setting up checkpoint logger...
I0424 20:30:56.681096 134839651915584 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0424 20:30:56.681141 134839651915584 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0424 20:30:56.681485 134839651915584 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 0x7aa215c50440>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0424 20:30:59.663427 134839651915584 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0424 20:30:59.663676 134839651915584 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 0x7a8dfc42c3e0>}, handler_registry=None
I0424 20:30:59.663914 134839651915584 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7a8dfc42c3e0>` 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`.
I0424 20:30:59.663966 134839651915584 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a8e3c22d430>` 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`.
I0424 20:30:59.664004 134839651915584 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 0x7a8dfc42c3e0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7a8dfc42c3e0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a8e3c22d430>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a8e3c22d430>}).
I0424 20:30:59.664339 134839651915584 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0424 20:30:59.664410 134839651915584 async_checkpointer.py:192] [process=5][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7a8d107eb2e0> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0424 20:31:00.753414 134839651915584 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints
I0424 20:31:01.221538 134839651915584 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=5), 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_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7a8dfc2c7530>
I0424 20:31:01.221739 134839651915584 checkpointing.py:301] Checkpoint manager created!
I0424 20:31:02.148101 134839651915584 nnx_wrappers.py:453] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0424 20:31:02.148220 134839651915584 nnx_wrappers.py:453] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0424 20:31:02.533138 134839651915584 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0424 20:31:02.533233 134839651915584 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0424 20:31:02.549997 134839651915584 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0424 20:31:02.550061 134839651915584 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0424 20:31:02.573675 134839651915584 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0424 20:31:02.573748 134839651915584 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0424 20:31:02.590385 134839651915584 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0424 20:31:02.590447 134839651915584 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0424 20:31:02.607115 134839651915584 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0424 20:31:02.607175 134839651915584 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0424 20:31:02.632156 134839651915584 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0424 20:31:02.632229 134839651915584 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0424 20:31:02.653331 134839651915584 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0424 20:31:02.653402 134839651915584 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0424 20:31:02.870600 134839651915584 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0424 20:31:02.870715 134839651915584 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0424 20:31:04.288958 134839651915584 maxtext_utils.py:1668]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0424 20:31:04.289088 134839651915584 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)
I0424 20:31:04.289143 134839651915584 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)
I0424 20:31:04.289206 134839651915584 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')
I0424 20:31:04.289260 134839651915584 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)
I0424 20:31:04.289300 134839651915584 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)
I0424 20:31:04.289353 134839651915584 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)
I0424 20:31:04.289404 134839651915584 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')
I0424 20:31:04.289445 134839651915584 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)
I0424 20:31:04.289483 134839651915584 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)
I0424 20:31:04.289531 134839651915584 maxtext_utils.py:1668]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)
I0424 20:31:04.289579 134839651915584 maxtext_utils.py:1668]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')

I0424 20:31:04.794169 134839651915584 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0424 20:31:04.794257 134839651915584 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0424 20:31:04.810107 134839651915584 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0424 20:31:04.810169 134839651915584 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0424 20:31:15.814455 134839651915584 max_utils.py:791] Total memory size: 1.5 GB, Output size: 0.4 GB, Temp size: 1.1 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB.
I0424 20:31:15.815319 134839651915584 metric_logger.py:301] number parameters: 1.104 billion
I0424 20:31:27.089896 134839651915584 checkpointing.py:772] Waiting for step 0 to finish before checkpoint...
I0424 20:31:27.243440 134839651915584 checkpointing.py:776] Waited 0.15352249145507812 seconds for step 0 to finish before starting checkpointing.
I0424 20:31:27.245779 134839651915584 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0424 20:31:27.247584 134839651915584 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 0
I0424 20:31:27.249018 134839651915584 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints/0.
I0424 20:31:27.586665 134839651915584 signaling_client.py:364] Using JaxDistributedSignalingClient
I0424 20:31:27.587643 134839651915584 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0424 20:31:27.587712 134839651915584 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
I0424 20:31:27.863255 134839651915584 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.276680s
I0424 20:31:27.863430 134839651915584 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 5.457 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28266453742980957 s) (per-host)
I0424 20:31:27.863486 134839651915584 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.282732s (batch_requests_ready=0.002688s, total_serialization_initiated=0.279968s, others=0.000075s)
I0424 20:31:27.863582 134839651915584 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.286857s (all_items=0.000033s, per_item={'items': '0.00003338'}, temp_paths=0.286824)
I0424 20:31:27.864469 134839651915584 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.62 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints/0.
I0424 20:31:27.864800 134711537108736 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-24 20:51:27.864761
I0424 20:31:28.287540 134839651915584 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0424 20:31:28.287910 134709963122432 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save.
I0424 20:31:28.288074 134839651915584 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777062687.245761, 'wait_for_prev_duration_secs': 5.936622619628906e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777062687.2476215, 'checkpointer_blocking_duration_secs': 0.6173303127288818, 'get_old_steps_start_time': 1777062687.8649776, 'get_old_steps_duration_secs': 3.0040740966796875e-05, 'checkpoint_manager_blocking_start_time': 1777062687.2439826, 'checkpoint_manager_blocking_duration_secs': 1.0440504550933838}
I0424 20:31:28.288186 134839651915584 checkpointing.py:408] Started an asynchronous checkpoint save for step 0
I0424 20:31:28.288243 134839651915584 max_utils.py:750] 
Memstats: After params initialized:
I0424 20:31:28.288300 134839651915584 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_18(process=5,(2,4,0,0))
I0424 20:31:28.288334 134839651915584 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_19(process=5,(3,4,0,0))
I0424 20:31:28.288361 134839651915584 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_22(process=5,(2,5,0,0))
I0424 20:31:28.288386 134839651915584 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_23(process=5,(3,5,0,0))
I0424 20:31:28.601426 134839651915584 metric_logger.py:196] completed step: 0, seconds: 11.274, TFLOP/s/device: 1.205, Tokens/s/device: 181.649, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0424 20:31:28.771737 134839651915584 metric_logger.py:196] completed step: 1, seconds: 1.510, TFLOP/s/device: 8.998, Tokens/s/device: 1356.246, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0424 20:31:29.193432 134839651915584 metric_logger.py:196] completed step: 2, seconds: 0.023, TFLOP/s/device: 591.233, Tokens/s/device: 89117.097, total_weights: 65536, loss: 10.560, lm_loss: 10.560, perplexity: 38547.719
I0424 20:31:29.341039 134839651915584 metric_logger.py:196] completed step: 3, seconds: 0.422, TFLOP/s/device: 32.206, Tokens/s/device: 4854.369, total_weights: 65536, loss: 9.980, lm_loss: 9.980, perplexity: 21590.506
I0424 20:31:29.345285 134839651915584 checkpointing.py:772] Waiting for step 5 to finish before checkpoint...
I0424 20:31:29.635214 134839651915584 checkpointing.py:776] Waited 0.28989362716674805 seconds for step 5 to finish before starting checkpointing.
I0424 20:31:29.638118 134839651915584 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0424 20:31:31.439288    2835 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0424 20:31:33.449612 134709971515136 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_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints/0/items/array_metadatas/process_5
I0424 20:32:04.892132 134711537108736 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 42.336 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 37.31133008003235 s) (per-host)
I0424 20:32:04.892240 134711537108736 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 37.027327s.
I0424 20:32:13.410941 134711537108736 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 45.546012s.
I0424 20:32:13.411235 134709963122432 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save.
I0424 20:32:13.411360 134709963122432 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save.
I0424 20:32:13.411409 134709963122432 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0424 20:32:13.412973 134709963122432 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0424 20:32:13.413145 134839651915584 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.
W0424 20:32:13.413281 134839651915584 checkpoint_manager.py:1452] Waiting for previous save to complete took 43.775162 seconds. If this number is high, consider checkpointing less frequently.
I0424 20:32:13.415339 134839651915584 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 5
I0424 20:32:13.417886 134839651915584 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints/5.
I0424 20:32:13.720958 134839651915584 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0424 20:32:13.721050 134839651915584 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
I0424 20:32:13.755043 134839651915584 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.035207s
I0424 20:32:13.755200 134839651915584 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 39.714 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.038842201232910156 s) (per-host)
I0424 20:32:13.755250 134839651915584 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.038908s (batch_requests_ready=0.001975s, total_serialization_initiated=0.036859s, others=0.000075s)
I0424 20:32:13.755337 134839651915584 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.043814s (all_items=0.000015s, per_item={'items': '0.00001526'}, temp_paths=0.043799)
I0424 20:32:13.755977 134839651915584 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.34 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints/5.
I0424 20:32:13.756305 134709971515136 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-24 20:52:13.756265
I0424 20:32:13.764618 134839651915584 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=5] Starting CheckpointManager Save Finalize thread=save_finalize
I0424 20:32:13.764919 134709963122432 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save.
I0424 20:32:13.765085 134839651915584 standard_logger.py:34] {'step': 5, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777062689.6380906, 'wait_for_prev_duration_secs': 43.77516222000122, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777062733.4153762, 'checkpointer_blocking_duration_secs': 0.34107184410095215, 'get_old_steps_start_time': 1777062733.7564726, 'get_old_steps_duration_secs': 2.8371810913085938e-05, 'checkpoint_manager_blocking_start_time': 1777062689.6358204, 'checkpoint_manager_blocking_duration_secs': 44.12922763824463}
I0424 20:32:13.765194 134839651915584 checkpointing.py:408] Started an asynchronous checkpoint save for step 5
I0424 20:32:13.765985 134839651915584 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.804, Tokens/s/device: 13385.446, total_weights: 65536, loss: 9.460, lm_loss: 9.460, perplexity: 12840.355
I0424 20:32:13.772034 134839651915584 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.199, Tokens/s/device: 13897.183, total_weights: 65536, loss: 8.959, lm_loss: 8.959, perplexity: 7776.467
I0424 20:32:19.240314 134689218090752 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_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints/5/items/array_metadatas/process_5
I0424 20:32:36.150121 134839651915584 metric_logger.py:196] completed step: 6, seconds: 44.425, TFLOP/s/device: 0.306, Tokens/s/device: 46.100, total_weights: 65536, loss: 8.469, lm_loss: 8.469, perplexity: 4762.740
I0424 20:32:36.297514 134839651915584 metric_logger.py:196] completed step: 7, seconds: 22.232, TFLOP/s/device: 0.611, Tokens/s/device: 92.119, total_weights: 65536, loss: 8.003, lm_loss: 8.003, perplexity: 2989.151
I0424 20:32:36.444756 134839651915584 metric_logger.py:196] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.284, Tokens/s/device: 13457.836, total_weights: 65536, loss: 7.572, lm_loss: 7.572, perplexity: 1943.098
I0424 20:32:36.591526 134839651915584 checkpointing.py:772] Waiting for step 9 to finish before checkpoint...
I0424 20:32:36.592229 134839651915584 checkpointing.py:776] Waited 0.0007231235504150391 seconds for step 9 to finish before starting checkpointing.
I0424 20:32:36.594342 134839651915584 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=5][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0424 20:32:56.637256 134709971515136 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 36.803 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.920865535736084 s) (per-host)
I0424 20:32:56.637385 134709971515136 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.880970s.
I0424 20:33:03.564908 134709971515136 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 49.808476s.
I0424 20:33:03.565178 134709963122432 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save.
I0424 20:33:03.565300 134709963122432 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save.
I0424 20:33:03.565351 134709963122432 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=5] CheckpointManager Save Finalize is syncing with other hosts...
I0424 20:33:03.566986 134709963122432 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=5] CheckpointManager Save Finalize is done on all hosts.
I0424 20:33:03.567173 134839651915584 checkpoint_manager.py:2032] [process=5][thread=MainThread][step=5][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=5.
W0424 20:33:03.567311 134839651915584 checkpoint_manager.py:1452] Waiting for previous save to complete took 26.972974 seconds. If this number is high, consider checkpointing less frequently.
I0424 20:33:03.569323 134839651915584 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 9
I0424 20:33:03.571388 134839651915584 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints/9.
I0424 20:33:03.928807 134839651915584 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0424 20:33:03.928898 134839651915584 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
I0424 20:33:03.965262 134839651915584 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.037395s
I0424 20:33:03.965415 134839651915584 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 37.572 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04105687141418457 s) (per-host)
I0424 20:33:03.965463 134839651915584 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.041115s (batch_requests_ready=0.001844s, total_serialization_initiated=0.039208s, others=0.000062s)
I0424 20:33:03.965544 134839651915584 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.045081s (all_items=0.000010s, per_item={'items': '0.00001049'}, temp_paths=0.045070)
I0424 20:33:03.966279 134839651915584 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.40 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints/9.
I0424 20:33:03.966562 134709963122432 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-24 20:53:03.966530
I0424 20:33:03.973729 134839651915584 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0424 20:33:03.973994 134708872595200 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save.
I0424 20:33:03.974152 134839651915584 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777062756.594314, 'wait_for_prev_duration_secs': 26.972973585128784, 'time_between_consecutive_saves_sec': 23.181302785873413, 'checkpointer_blocking_start_time': 1777062783.5693607, 'checkpointer_blocking_duration_secs': 0.3973534107208252, 'get_old_steps_start_time': 1777062783.9667313, 'get_old_steps_duration_secs': 2.47955322265625e-05, 'checkpoint_manager_blocking_start_time': 1777062756.592455, 'checkpoint_manager_blocking_duration_secs': 27.38166642189026}
I0424 20:33:03.974254 134839651915584 checkpointing.py:408] Started an asynchronous checkpoint save for step 9
I0424 20:33:03.974297 134839651915584 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0424 20:33:09.655884 134689218090752 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_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_08_checkpoint_async_true/checkpoints/9/items/array_metadatas/process_5
I0424 20:33:45.454949 134709963122432 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 38.035 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.5305380821228 s) (per-host)
I0424 20:33:45.455064 134709963122432 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.488379s.
I0424 20:33:52.120116 134709963122432 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 48.153415s.
I0424 20:33:52.120382 134708872595200 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save.
I0424 20:33:52.120501 134708872595200 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save.
I0424 20:33:52.120543 134708872595200 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0424 20:33:52.122094 134708872595200 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0424 20:33:52.122263 134839651915584 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.
I0424 20:33:52.122416 134839651915584 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0424 20:33:52.124452 134839651915584 metric_logger.py:196] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.283, Tokens/s/device: 13909.925, total_weights: 65536, loss: 7.181, lm_loss: 7.181, perplexity: 1314.495
Per train step:
 Total TFLOPs: 13.59 
 split as 93.93% learnable weight flops and 6.07% attention flops
XPK End: Fri Apr 24 20:34:04 UTC 2026
EXIT_CODE=0