MaxView

Timing Test Reference Updates
‹ 15_ocdbt_false_saveCase: 15_ocdbt_true_resume15_ocdbt_true_save ›

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 loss5.39105.39100
TFLOP/s92.31592.237-0.078
Tok/s13914.613903.0-11.618
Avg s/step8.5038.234-0.269
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 08:04:21 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 08:04:45.781670: 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 08:04:45.987311 132995791423296 max_utils.py:273] Attempting to initialize the jax distributed system...
I0424 08:04:55.028265 132995791423296 distributed.py:149] Starting JAX distributed service on [::]:8482
I0424 08:04:55.030549 132995791423296 distributed.py:172] Connecting to JAX distributed service on mt-15-ocdbt-true-rs-dfhxx-slice-job-0-0.mt-15-ocdbt-true-rs-dfhxx:8482
I0424 08:04:56.172222 132995791423296 max_utils.py:284] Jax distributed system initialized!
I0424 08:05:02.353711 132995791423296 max_utils.py:800] System Information: Jax Version: 0.9.2
I0424 08:05:02.353821 132995791423296 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0424 08:05:02.353861 132995791423296 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 08:05:02.353896 132995791423296 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0424 08:05:03.078393 132995791423296 maxtext_utils.py:1604] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1)
I0424 08:05:03.078673 132995791423296 checkpointing.py:677] Setting up checkpoint logger...
I0424 08:05:03.078726 132995791423296 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0424 08:05:03.078773 132995791423296 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0424 08:05:03.079129 132995791423296 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 0x78f4de116ff0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0424 08:05:04.329909 132995791423296 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0424 08:05:04.330159 132995791423296 checkpoint_manager.py:708] [process=6][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x78e0601a0350>}, handler_registry=None
I0424 08:05:04.330400 132995791423296 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x78e0601a0350>` 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 08:05:04.330450 132995791423296 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x78e0601a3fb0>` 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 08:05:04.330489 132995791423296 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 0x78e0601a0350>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x78e0601a0350>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x78e0601a3fb0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x78e0601a3fb0>}).
I0424 08:05:04.330832 132995791423296 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0424 08:05:04.330901 132995791423296 async_checkpointer.py:192] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x78e048609a80> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0424 08:05:05.853984 132873050904320 checkpoint.py:228] Read Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1777017741383856738, 'commit_timestamp_nsecs': 1777017788340820620, 'custom_metadata': {}} from gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_15_ocdbt_true/checkpoints/9/_CHECKPOINT_METADATA
I0424 08:05:06.105169 132873050904320 checkpoint_manager.py:1871] Missing metrics for step 9
I0424 08:05:06.296608 132995791423296 checkpoint_manager.py:1812] Found 3 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_15_ocdbt_true/checkpoints
I0424 08:05:06.435004 132995791423296 checkpoint_manager.py:929] [process=6][thread=MainThread] CheckpointManager created,  primary_host=0, CheckpointManagerOptions=CheckpointManagerOptions(save_interval_steps=1, max_to_keep=None, keep_time_interval=None, keep_period=None, should_keep_fn=None, best_fn=None, best_mode='max', keep_checkpoints_without_metrics=True, step_prefix=None, step_format_fixed_length=None, step_name_format=None, create=True, cleanup_tmp_directories=False, save_on_steps=frozenset(), single_host_load_and_broadcast=False, todelete_subdir=None, todelete_full_path=None, enable_background_delete=False, read_only=False, enable_async_checkpointing=True, async_options=None, multiprocessing_options=MultiprocessingOptions(primary_host=0, active_processes=None, barrier_sync_key_prefix=None), should_save_fn=None, file_options=FileOptions(path_permission_mode=None), save_root_metadata=True, temporary_path_class=None, save_decision_policy=FixedIntervalPolicy(interval=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_15_ocdbt_true/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x78e0601a3ef0>
I0424 08:05:06.435212 132995791423296 checkpointing.py:301] Checkpoint manager created!
I0424 08:05:07.372801 132995791423296 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0424 08:05:07.372924 132995791423296 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0424 08:05:07.758501 132995791423296 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn').
I0424 08:05:07.758598 132995791423296 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0424 08:05:07.782028 132995791423296 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn').
I0424 08:05:07.782139 132995791423296 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0424 08:05:07.806379 132995791423296 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim').
I0424 08:05:07.806450 132995791423296 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0424 08:05:07.823125 132995791423296 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim').
I0424 08:05:07.823189 132995791423296 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0424 08:05:07.839829 132995791423296 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim').
I0424 08:05:07.839889 132995791423296 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0424 08:05:07.864864 132995791423296 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch_attn', 'activation_length_attn', 'activation_heads', 'activation_kv').
I0424 08:05:07.864938 132995791423296 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0424 08:05:07.886324 132995791423296 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0424 08:05:07.886391 132995791423296 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0424 08:05:08.097963 132995791423296 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0424 08:05:08.098074 132995791423296 checkpointing.py:581] restoring from this run's directory step 9
I0424 08:05:08.775144 132995791423296 event_tracking.py:70] [process=6] [sync] Started load checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_15_ocdbt_true/checkpoints/9.
I0424 08:05:09.030171 132995791423296 checkpointer.py:307] Restoring checkpoint from gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_15_ocdbt_true/checkpoints/9.
I0424 08:05:09.030622 132995791423296 event_tracking.py:125] [process=6] [sync] Finished blocking load in 0.26 seconds. Continuing load @ gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_15_ocdbt_true/checkpoints/9.
I0424 08:05:10.848150    1472 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0424 08:05:16.712714 132995791423296 jax_array_handlers.py:843] [process=6] /jax/orbax/read/worker/io/requested throughput: 269.174 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 5.870823383331299 s) (per-host)
I0424 08:05:16.717359 132995791423296 base_pytree_checkpoint_handler.py:130] [process=6] /jax/checkpoint/read/gbytes_per_sec: 252.640 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 6.26422381401062 s) (per-host)
I0424 08:05:16.928149 132995791423296 event_tracking.py:138] [process=6] [sync] Finished load in 8.15 seconds @ gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_15_ocdbt_true/checkpoints/9
I0424 08:05:16.928309 132995791423296 standard_logger.py:34] {'step': 9, 'event_type': 'restore', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_15_ocdbt_true/checkpoints', 'checkpointer_start_time': 1777017908.7750282, 'checkpointer_duration_secs': 8.15324878692627, 'checkpoint_manager_start_time': 1777017908.0983343, 'checkpoint_manager_duration_secs': 8.829945087432861}
fsdp: 32
I0424 08:05:17.348405 132995791423296 maxtext_utils.py:1707]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0424 08:05:17.348537 132995791423296 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 08:05:17.348590 132995791423296 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 08:05:17.348650 132995791423296 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 08:05:17.348703 132995791423296 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 08:05:17.348741 132995791423296 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 08:05:17.348793 132995791423296 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 08:05:17.348847 132995791423296 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 08:05:17.348888 132995791423296 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 08:05:17.348924 132995791423296 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 08:05:17.348971 132995791423296 maxtext_utils.py:1707]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)

I0424 08:05:17.349019 132995791423296 maxtext_utils.py:1707]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')
I0424 08:05:17.836534 132995791423296 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0424 08:05:17.836625 132995791423296 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0424 08:05:17.852375 132995791423296 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0424 08:05:17.852433 132995791423296 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0424 08:05:28.989715 132995791423296 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 08:05:28.990511 132995791423296 metric_logger.py:301] number parameters: 1.104 billion
I0424 08:05:40.769477 132995791423296 checkpointing.py:772] Waiting for step 10 to finish before checkpoint...
I0424 08:05:40.923074 132995791423296 checkpointing.py:776] Waited 0.15357375144958496 seconds for step 10 to finish before starting checkpointing.
I0424 08:05:40.925379 132995791423296 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0424 08:05:40.927207 132995791423296 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 10
I0424 08:05:40.928696 132995791423296 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_15_ocdbt_true/checkpoints/10.
I0424 08:05:41.514603 132995791423296 signaling_client.py:364] Using JaxDistributedSignalingClient
I0424 08:05:41.515604 132995791423296 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0424 08:05:41.515661 132995791423296 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 08:05:41.798963 132995791423296 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.284443s
I0424 08:05:41.799143 132995791423296 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.350 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2883458137512207 s) (per-host)
I0424 08:05:41.799197 132995791423296 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.288411s (batch_requests_ready=0.002166s, total_serialization_initiated=0.286172s, others=0.000074s)
I0424 08:05:41.799293 132995791423296 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.292597s (all_items=0.000017s, per_item={'items': '0.00001740'}, temp_paths=0.292580)
I0424 08:05:41.800015 132995791423296 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.87 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_15_ocdbt_true/checkpoints/10.
I0424 08:05:41.800330 132873017333504 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-24 08:25:41.800296
I0424 08:05:41.802287 132995791423296 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize
I0424 08:05:41.802543 132869242484480 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0424 08:05:41.802645 132995791423296 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_15_ocdbt_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777017940.9253564, 'wait_for_prev_duration_secs': 6.341934204101562e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777017940.9272463, 'checkpointer_blocking_duration_secs': 0.8732378482818604, 'get_old_steps_start_time': 1777017941.8005073, 'get_old_steps_duration_secs': 3.1948089599609375e-05, 'checkpoint_manager_blocking_start_time': 1777017940.9235432, 'checkpoint_manager_blocking_duration_secs': 0.8790662288665771}
I0424 08:05:41.802793 132995791423296 checkpointing.py:408] Started an asynchronous checkpoint save for step 10
I0424 08:05:41.802844 132995791423296 max_utils.py:750] 
Memstats: After params initialized:
I0424 08:05:41.802894 132995791423296 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0))
I0424 08:05:41.802925 132995791423296 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0))
I0424 08:05:41.802952 132995791423296 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0))
I0424 08:05:41.802975 132995791423296 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0))
I0424 08:05:42.121570 132995791423296 metric_logger.py:196] completed step: 10, seconds: 11.779, TFLOP/s/device: 1.154, Tokens/s/device: 173.871, total_weights: 65536, loss: 6.833, lm_loss: 6.833, perplexity: 927.869
I0424 08:05:42.303108 132995791423296 metric_logger.py:196] completed step: 11, seconds: 1.351, TFLOP/s/device: 10.061, Tokens/s/device: 1516.452, total_weights: 65536, loss: 6.527, lm_loss: 6.527, perplexity: 683.659
I0424 08:05:42.450906 132995791423296 metric_logger.py:196] completed step: 12, seconds: 0.034, TFLOP/s/device: 394.504, Tokens/s/device: 59464.011, total_weights: 65536, loss: 6.265, lm_loss: 6.265, perplexity: 526.068
I0424 08:05:42.598750 132995791423296 metric_logger.py:196] completed step: 13, seconds: 0.153, TFLOP/s/device: 88.610, Tokens/s/device: 13356.289, total_weights: 65536, loss: 6.045, lm_loss: 6.045, perplexity: 422.001
I0424 08:05:42.603438 132995791423296 checkpointing.py:772] Waiting for step 15 to finish before checkpoint...
I0424 08:05:42.893000 132995791423296 checkpointing.py:776] Waited 0.28952836990356445 seconds for step 15 to finish before starting checkpointing.
I0424 08:05:42.895966 132995791423296 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0424 08:05:47.045474 132869730465536 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_15_ocdbt_true/checkpoints/10/items/array_metadatas/process_6
I0424 08:06:23.446265 132873017333504 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 37.667 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.93542456626892 s) (per-host)
I0424 08:06:23.446403 132873017333504 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.645959s.
I0424 08:06:32.263351 132873017333504 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 50.462875s.
I0424 08:06:32.263671 132869242484480 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0424 08:06:32.263790 132869242484480 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0424 08:06:32.263837 132869242484480 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts...
I0424 08:06:32.266029 132869242484480 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts.
I0424 08:06:32.266181 132995791423296 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=10][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=10.
W0424 08:06:32.266267 132995791423296 checkpoint_manager.py:1452] Waiting for previous save to complete took 49.370308 seconds. If this number is high, consider checkpointing less frequently.
I0424 08:06:32.268320 132995791423296 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 15
I0424 08:06:32.270826 132995791423296 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_15_ocdbt_true/checkpoints/15.
I0424 08:06:32.563499 132995791423296 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0424 08:06:32.563594 132995791423296 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 08:06:32.589970 132995791423296 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.027660s
I0424 08:06:32.590155 132995791423296 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 49.524 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.03114795684814453 s) (per-host)
I0424 08:06:32.590208 132995791423296 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.031212s (batch_requests_ready=0.001781s, total_serialization_initiated=0.029359s, others=0.000072s)
I0424 08:06:32.590310 132995791423296 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.036241s (all_items=0.000013s, per_item={'items': '0.00001311'}, temp_paths=0.036228)
I0424 08:06:32.591012 132995791423296 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.32 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_15_ocdbt_true/checkpoints/15.
I0424 08:06:32.591351 132869242484480 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-24 08:26:32.591313
I0424 08:06:32.604626 132995791423296 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=15] Starting CheckpointManager Save Finalize thread=save_finalize
I0424 08:06:32.604876 132869730465536 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0424 08:06:32.605019 132995791423296 standard_logger.py:34] {'step': 15, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_15_ocdbt_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777017942.8959346, 'wait_for_prev_duration_secs': 49.3703076839447, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777017992.268359, 'checkpointer_blocking_duration_secs': 0.32316017150878906, 'get_old_steps_start_time': 1777017992.5915434, 'get_old_steps_duration_secs': 3.075599670410156e-05, 'checkpoint_manager_blocking_start_time': 1777017942.8936818, 'checkpoint_manager_blocking_duration_secs': 49.71130347251892}
I0424 08:06:32.605137 132995791423296 checkpointing.py:408] Started an asynchronous checkpoint save for step 15
I0424 08:06:32.605987 132995791423296 metric_logger.py:196] completed step: 14, seconds: 0.148, TFLOP/s/device: 91.884, Tokens/s/device: 13849.722, total_weights: 65536, loss: 5.864, lm_loss: 5.864, perplexity: 352.193
I0424 08:06:32.614163 132995791423296 metric_logger.py:196] completed step: 15, seconds: 0.148, TFLOP/s/device: 92.004, Tokens/s/device: 13867.822, total_weights: 65536, loss: 5.719, lm_loss: 5.719, perplexity: 304.661
I0424 08:06:38.318435 132868664346368 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_15_ocdbt_true/checkpoints/15/items/array_metadatas/process_6
I0424 08:06:53.873650 132995791423296 metric_logger.py:196] completed step: 16, seconds: 50.009, TFLOP/s/device: 0.272, Tokens/s/device: 40.953, total_weights: 65536, loss: 5.605, lm_loss: 5.605, perplexity: 271.872
I0424 08:06:54.021030 132995791423296 metric_logger.py:196] completed step: 17, seconds: 21.113, TFLOP/s/device: 0.644, Tokens/s/device: 97.000, total_weights: 65536, loss: 5.517, lm_loss: 5.517, perplexity: 248.975
I0424 08:06:54.168282 132995791423296 metric_logger.py:196] completed step: 18, seconds: 0.152, TFLOP/s/device: 89.157, Tokens/s/device: 13438.761, total_weights: 65536, loss: 5.448, lm_loss: 5.448, perplexity: 232.333
I0424 08:06:54.314886 132995791423296 checkpointing.py:772] Waiting for step 19 to finish before checkpoint...
I0424 08:06:54.315618 132995791423296 checkpointing.py:776] Waited 0.0007538795471191406 seconds for step 19 to finish before starting checkpointing.
I0424 08:06:54.317665 132995791423296 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=15][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0424 08:07:14.210482 132869242484480 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 37.924 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.651445627212524 s) (per-host)
I0424 08:07:14.210592 132869242484480 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.619121s.
I0424 08:07:24.172067 132869242484480 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 51.580581s.
I0424 08:07:24.172337 132869730465536 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0424 08:07:24.172394 132869730465536 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0424 08:07:24.172439 132869730465536 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=15] CheckpointManager Save Finalize is syncing with other hosts...
I0424 08:07:24.174672 132869730465536 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=15] CheckpointManager Save Finalize is done on all hosts.
I0424 08:07:24.174844 132995791423296 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=15][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=15.
W0424 08:07:24.174973 132995791423296 checkpoint_manager.py:1452] Waiting for previous save to complete took 29.857313 seconds. If this number is high, consider checkpointing less frequently.
I0424 08:07:24.176469 132995791423296 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 19
I0424 08:07:24.178480 132995791423296 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_15_ocdbt_true/checkpoints/19.
I0424 08:07:24.681343 132995791423296 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0424 08:07:24.681436 132995791423296 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 08:07:24.707644 132995791423296 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.027232s
I0424 08:07:24.707823 132995791423296 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 50.141 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.03076481819152832 s) (per-host)
I0424 08:07:24.707876 132995791423296 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.030828s (batch_requests_ready=0.001670s, total_serialization_initiated=0.029089s, others=0.000069s)
I0424 08:07:24.707975 132995791423296 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.035048s (all_items=0.000012s, per_item={'items': '0.00001216'}, temp_paths=0.035036)
I0424 08:07:24.708579 132995791423296 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.53 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_15_ocdbt_true/checkpoints/19.
I0424 08:07:24.708842 132871431898880 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-24 08:27:24.708808
I0424 08:07:24.711776 132995791423296 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize
I0424 08:07:24.712046 132869730465536 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0424 08:07:24.712214 132995791423296 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_15_ocdbt_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777018014.317635, 'wait_for_prev_duration_secs': 29.85731291770935, 'time_between_consecutive_saves_sec': 22.05156660079956, 'checkpointer_blocking_start_time': 1777018044.1765099, 'checkpointer_blocking_duration_secs': 0.5324673652648926, 'get_old_steps_start_time': 1777018044.7089915, 'get_old_steps_duration_secs': 2.3603439331054688e-05, 'checkpoint_manager_blocking_start_time': 1777018014.315853, 'checkpoint_manager_blocking_duration_secs': 30.39633059501648}
I0424 08:07:24.712327 132995791423296 checkpointing.py:408] Started an asynchronous checkpoint save for step 19
I0424 08:07:24.712370 132995791423296 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0424 08:07:30.251598 132868664346368 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_15_ocdbt_true/checkpoints/19/items/array_metadatas/process_6
I0424 08:08:06.860844 132871431898880 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 37.446 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.183748722076416 s) (per-host)
I0424 08:08:06.860963 132871431898880 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.152015s.
I0424 08:08:14.451831 132871431898880 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 49.742868s.
I0424 08:08:14.452170 132869730465536 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0424 08:08:14.452298 132869730465536 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0424 08:08:14.452339 132869730465536 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts...
I0424 08:08:14.454108 132869730465536 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts.
I0424 08:08:14.454308 132995791423296 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=19][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=19.
I0424 08:08:14.454459 132995791423296 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0424 08:08:14.455467 132995791423296 metric_logger.py:196] completed step: 19, seconds: 0.147, TFLOP/s/device: 92.315, Tokens/s/device: 13914.650, total_weights: 65536, loss: 5.391, lm_loss: 5.391, perplexity: 219.349
Per train step:
 Total TFLOPs: 13.59 
 split as 93.93% learnable weight flops and 6.07% attention flops
XPK End: Fri Apr 24 08:08:26 UTC 2026
EXIT_CODE=0
test/pipeline-scan-nnx  ·  5b21b66fc  ·  test_pipeline_scan_nnx_20260424_200834  ·  full log 
XPK Start: Fri Apr 24 21:08:01 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 21:08:26.134634: 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 21:08:26.346601 136775461685056 max_utils.py:273] Attempting to initialize the jax distributed system...
I0424 21:08:35.387986 136775461685056 distributed.py:149] Starting JAX distributed service on [::]:8482
I0424 21:08:35.390325 136775461685056 distributed.py:172] Connecting to JAX distributed service on mt-15-ocdbt-true-rs-ww2nh-slice-job-0-0.mt-15-ocdbt-true-rs-ww2nh:8482
I0424 21:08:36.451667 136775461685056 max_utils.py:284] Jax distributed system initialized!
I0424 21:08:42.825463 136775461685056 max_utils.py:800] System Information: Jax Version: 0.9.2
I0424 21:08:42.825575 136775461685056 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0424 21:08:42.825614 136775461685056 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 21:08:42.825649 136775461685056 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0424 21:08:43.514655 136775461685056 maxtext_utils.py:1565] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0424 21:08:43.514964 136775461685056 checkpointing.py:677] Setting up checkpoint logger...
I0424 21:08:43.515038 136775461685056 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0424 21:08:43.515089 136775461685056 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0424 21:08:43.515457 136775461685056 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 0x7c64f3906390>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0424 21:08:44.867482 136775461685056 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0424 21:08:44.867729 136775461685056 checkpoint_manager.py:708] [process=6][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7c50502c7a70>}, handler_registry=None
I0424 21:08:44.868017 136775461685056 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7c50502c7a70>` 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 21:08:44.868076 136775461685056 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7c50502c9d30>` 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 21:08:44.868128 136775461685056 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 0x7c50502c7a70>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7c50502c7a70>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7c50502c9d30>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7c50502c9d30>}).
I0424 21:08:44.868457 136775461685056 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0424 21:08:44.868534 136775461685056 async_checkpointer.py:192] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7c4f786c7420> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0424 21:08:46.644551 136653075101440 checkpoint.py:228] Read Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1777064708338276822, 'commit_timestamp_nsecs': 1777064755433403953, 'custom_metadata': {}} from gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_15_ocdbt_true/checkpoints/5/_CHECKPOINT_METADATA
I0424 21:08:46.881532 136653075101440 checkpoint_manager.py:1871] Missing metrics for step 5
I0424 21:08:46.928213 136775461685056 checkpoint_manager.py:1812] Found 3 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_15_ocdbt_true/checkpoints
I0424 21:08:47.636277 136775461685056 checkpoint_manager.py:929] [process=6][thread=MainThread] CheckpointManager created,  primary_host=0, CheckpointManagerOptions=CheckpointManagerOptions(save_interval_steps=1, max_to_keep=None, keep_time_interval=None, keep_period=None, should_keep_fn=None, best_fn=None, best_mode='max', keep_checkpoints_without_metrics=True, step_prefix=None, step_format_fixed_length=None, step_name_format=None, create=True, cleanup_tmp_directories=False, save_on_steps=frozenset(), single_host_load_and_broadcast=False, todelete_subdir=None, todelete_full_path=None, enable_background_delete=False, read_only=False, enable_async_checkpointing=True, async_options=None, multiprocessing_options=MultiprocessingOptions(primary_host=0, active_processes=None, barrier_sync_key_prefix=None), should_save_fn=None, file_options=FileOptions(path_permission_mode=None), save_root_metadata=True, temporary_path_class=None, save_decision_policy=FixedIntervalPolicy(interval=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_15_ocdbt_true/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7c50502c7470>
I0424 21:08:47.636452 136775461685056 checkpointing.py:301] Checkpoint manager created!
I0424 21:08:48.573974 136775461685056 nnx_wrappers.py:453] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0424 21:08:48.574089 136775461685056 nnx_wrappers.py:453] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0424 21:08:48.953376 136775461685056 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0424 21:08:48.953466 136775461685056 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0424 21:08:48.970089 136775461685056 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0424 21:08:48.970161 136775461685056 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0424 21:08:48.993905 136775461685056 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 21:08:48.993975 136775461685056 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0424 21:08:49.010601 136775461685056 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 21:08:49.010663 136775461685056 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0424 21:08:49.027292 136775461685056 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 21:08:49.027351 136775461685056 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0424 21:08:49.052210 136775461685056 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0424 21:08:49.052283 136775461685056 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0424 21:08:49.074245 136775461685056 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0424 21:08:49.074315 136775461685056 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0424 21:08:49.283598 136775461685056 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0424 21:08:49.283709 136775461685056 checkpointing.py:581] restoring from this run's directory step 9
I0424 21:08:49.521891 136775461685056 event_tracking.py:70] [process=6] [sync] Started load checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_15_ocdbt_true/checkpoints/9.
I0424 21:08:49.782829 136775461685056 checkpointer.py:307] Restoring checkpoint from gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_15_ocdbt_true/checkpoints/9.
I0424 21:08:49.783272 136775461685056 event_tracking.py:125] [process=6] [sync] Finished blocking load in 0.26 seconds. Continuing load @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_15_ocdbt_true/checkpoints/9.
I0424 21:08:51.189244    1469 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0424 21:08:57.375524 136775461685056 jax_array_handlers.py:843] [process=6] /jax/orbax/read/worker/io/requested throughput: 255.188 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 6.192585706710815 s) (per-host)
I0424 21:08:57.380225 136775461685056 base_pytree_checkpoint_handler.py:130] [process=6] /jax/checkpoint/read/gbytes_per_sec: 240.142 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 6.5902392864227295 s) (per-host)
I0424 21:08:58.619334 136775461685056 event_tracking.py:138] [process=6] [sync] Finished load in 9.10 seconds @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_15_ocdbt_true/checkpoints/9
I0424 21:08:58.619497 136775461685056 standard_logger.py:34] {'step': 9, 'event_type': 'restore', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_15_ocdbt_true/checkpoints', 'checkpointer_start_time': 1777064929.5217953, 'checkpointer_duration_secs': 9.097668886184692, 'checkpoint_manager_start_time': 1777064929.283956, 'checkpoint_manager_duration_secs': 9.335510730743408}
fsdp: 32
I0424 21:08:59.043404 136775461685056 maxtext_utils.py:1668]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0424 21:08:59.043539 136775461685056 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 21:08:59.043594 136775461685056 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 21:08:59.043653 136775461685056 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 21:08:59.043703 136775461685056 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 21:08:59.043739 136775461685056 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 21:08:59.043789 136775461685056 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 21:08:59.043838 136775461685056 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 21:08:59.043876 136775461685056 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 21:08:59.043910 136775461685056 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 21:08:59.043954 136775461685056 maxtext_utils.py:1668]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)

I0424 21:08:59.043999 136775461685056 maxtext_utils.py:1668]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')
I0424 21:08:59.534913 136775461685056 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0424 21:08:59.535009 136775461685056 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0424 21:08:59.550606 136775461685056 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0424 21:08:59.550667 136775461685056 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0424 21:09:10.666749 136775461685056 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 21:09:10.667603 136775461685056 metric_logger.py:301] number parameters: 1.104 billion
I0424 21:09:22.280694 136775461685056 checkpointing.py:772] Waiting for step 10 to finish before checkpoint...
I0424 21:09:22.434837 136775461685056 checkpointing.py:776] Waited 0.15412235260009766 seconds for step 10 to finish before starting checkpointing.
I0424 21:09:22.437444 136775461685056 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0424 21:09:22.439556 136775461685056 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 10
I0424 21:09:22.441612 136775461685056 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_15_ocdbt_true/checkpoints/10.
I0424 21:09:22.766880 136775461685056 signaling_client.py:364] Using JaxDistributedSignalingClient
I0424 21:09:22.767855 136775461685056 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0424 21:09:22.767911 136775461685056 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 21:09:23.042904 136775461685056 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.276099s
I0424 21:09:23.043069 136775461685056 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.508 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2800567150115967 s) (per-host)
I0424 21:09:23.043141 136775461685056 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.280135s (batch_requests_ready=0.002287s, total_serialization_initiated=0.277761s, others=0.000087s)
I0424 21:09:23.043264 136775461685056 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.284329s (all_items=0.000016s, per_item={'items': '0.00001597'}, temp_paths=0.284313)
I0424 21:09:23.043986 136775461685056 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.60 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_15_ocdbt_true/checkpoints/10.
I0424 21:09:23.044327 136652471121664 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-24 21:29:23.044291
I0424 21:09:23.052447 136775461685056 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize
I0424 21:09:23.052718 136648722151168 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0424 21:09:23.052873 136775461685056 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_15_ocdbt_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777064962.437426, 'wait_for_prev_duration_secs': 6.175041198730469e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777064962.4395943, 'checkpointer_blocking_duration_secs': 0.6049079895019531, 'get_old_steps_start_time': 1777064963.0445328, 'get_old_steps_duration_secs': 3.147125244140625e-05, 'checkpoint_manager_blocking_start_time': 1777064962.435387, 'checkpoint_manager_blocking_duration_secs': 0.6174511909484863}
I0424 21:09:23.052975 136775461685056 checkpointing.py:408] Started an asynchronous checkpoint save for step 10
I0424 21:09:23.053024 136775461685056 max_utils.py:750] 
Memstats: After params initialized:
I0424 21:09:23.053072 136775461685056 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0))
I0424 21:09:23.053121 136775461685056 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0))
I0424 21:09:23.053149 136775461685056 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0))
I0424 21:09:23.053172 136775461685056 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0))
I0424 21:09:23.797856 136775461685056 metric_logger.py:196] completed step: 10, seconds: 11.613, TFLOP/s/device: 1.170, Tokens/s/device: 176.354, total_weights: 65536, loss: 6.833, lm_loss: 6.833, perplexity: 927.869
I0424 21:09:23.945551 136775461685056 metric_logger.py:196] completed step: 11, seconds: 1.516, TFLOP/s/device: 8.965, Tokens/s/device: 1351.342, total_weights: 65536, loss: 6.527, lm_loss: 6.527, perplexity: 683.659
I0424 21:09:24.093574 136775461685056 metric_logger.py:196] completed step: 12, seconds: 0.005, TFLOP/s/device: 2702.831, Tokens/s/device: 407400.040, total_weights: 65536, loss: 6.265, lm_loss: 6.265, perplexity: 526.068
I0424 21:09:24.240907 136775461685056 metric_logger.py:196] completed step: 13, seconds: 0.149, TFLOP/s/device: 91.469, Tokens/s/device: 13787.254, total_weights: 65536, loss: 6.045, lm_loss: 6.045, perplexity: 422.001
I0424 21:09:24.245171 136775461685056 checkpointing.py:772] Waiting for step 15 to finish before checkpoint...
I0424 21:09:24.534686 136775461685056 checkpointing.py:776] Waited 0.28947973251342773 seconds for step 15 to finish before starting checkpointing.
I0424 21:09:24.537942 136775461685056 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0424 21:09:28.030856 136651397379840 array_metadata_store.py:203] [process=6][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_15_ocdbt_true/checkpoints/10/items/array_metadatas/process_6
I0424 21:10:05.046321 136652471121664 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 37.357 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.283273696899414 s) (per-host)
I0424 21:10:05.046436 136652471121664 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.001999s.
I0424 21:10:11.762695 136652471121664 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 48.718241s.
I0424 21:10:11.762965 136648722151168 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0424 21:10:11.763085 136648722151168 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0424 21:10:11.763147 136648722151168 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts...
I0424 21:10:11.767939 136648722151168 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts.
I0424 21:10:11.768125 136775461685056 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=10][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=10.
W0424 21:10:11.768250 136775461685056 checkpoint_manager.py:1452] Waiting for previous save to complete took 47.230308 seconds. If this number is high, consider checkpointing less frequently.
I0424 21:10:11.770336 136775461685056 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 15
I0424 21:10:11.772881 136775461685056 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_15_ocdbt_true/checkpoints/15.
I0424 21:10:12.052656 136775461685056 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0424 21:10:12.052746 136775461685056 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 21:10:12.078380 136775461685056 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.026799s
I0424 21:10:12.078505 136775461685056 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 50.942 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.03028082847595215 s) (per-host)
I0424 21:10:12.078555 136775461685056 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.030338s (batch_requests_ready=0.001884s, total_serialization_initiated=0.028390s, others=0.000064s)
I0424 21:10:12.078659 136775461685056 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.035359s (all_items=0.000014s, per_item={'items': '0.00001383'}, temp_paths=0.035346)
I0424 21:10:12.079370 136775461685056 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.31 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_15_ocdbt_true/checkpoints/15.
I0424 21:10:12.079673 136648722151168 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-24 21:30:12.079638
I0424 21:10:12.092879 136775461685056 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=15] Starting CheckpointManager Save Finalize thread=save_finalize
I0424 21:10:12.093186 136648705365760 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0424 21:10:12.093330 136775461685056 standard_logger.py:34] {'step': 15, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_15_ocdbt_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777064964.5379128, 'wait_for_prev_duration_secs': 47.230308294296265, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777065011.770374, 'checkpointer_blocking_duration_secs': 0.30943965911865234, 'get_old_steps_start_time': 1777065012.079837, 'get_old_steps_duration_secs': 2.9087066650390625e-05, 'checkpoint_manager_blocking_start_time': 1777064964.5352986, 'checkpoint_manager_blocking_duration_secs': 47.557997703552246}
I0424 21:10:12.093506 136775461685056 checkpointing.py:408] Started an asynchronous checkpoint save for step 15
I0424 21:10:12.094370 136775461685056 metric_logger.py:196] completed step: 14, seconds: 0.148, TFLOP/s/device: 91.747, Tokens/s/device: 13829.055, total_weights: 65536, loss: 5.864, lm_loss: 5.864, perplexity: 352.193
I0424 21:10:12.100520 136775461685056 metric_logger.py:196] completed step: 15, seconds: 0.147, TFLOP/s/device: 92.326, Tokens/s/device: 13916.447, total_weights: 65536, loss: 5.719, lm_loss: 5.719, perplexity: 304.661
I0424 21:10:17.138613 136651397379840 array_metadata_store.py:203] [process=6][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_15_ocdbt_true/checkpoints/15/items/array_metadatas/process_6
I0424 21:10:32.851758 136775461685056 metric_logger.py:196] completed step: 16, seconds: 47.854, TFLOP/s/device: 0.284, Tokens/s/device: 42.797, total_weights: 65536, loss: 5.605, lm_loss: 5.605, perplexity: 271.872
I0424 21:10:32.999056 136775461685056 metric_logger.py:196] completed step: 17, seconds: 20.605, TFLOP/s/device: 0.659, Tokens/s/device: 99.392, total_weights: 65536, loss: 5.517, lm_loss: 5.517, perplexity: 248.975
I0424 21:10:33.146327 136775461685056 metric_logger.py:196] completed step: 18, seconds: 0.152, TFLOP/s/device: 89.347, Tokens/s/device: 13467.394, total_weights: 65536, loss: 5.448, lm_loss: 5.448, perplexity: 232.333
I0424 21:10:33.293127 136775461685056 checkpointing.py:772] Waiting for step 19 to finish before checkpoint...
I0424 21:10:33.293833 136775461685056 checkpointing.py:776] Waited 0.0007555484771728516 seconds for step 19 to finish before starting checkpointing.
I0424 21:10:33.295921 136775461685056 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=15][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0424 21:10:53.116571 136648722151168 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 38.463 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.06830549240112 s) (per-host)
I0424 21:10:53.116687 136648722151168 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.036902s.
I0424 21:11:01.581012 136648722151168 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 49.501211s.
I0424 21:11:01.581320 136648705365760 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0424 21:11:01.581437 136648705365760 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0424 21:11:01.581482 136648705365760 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=15] CheckpointManager Save Finalize is syncing with other hosts...
I0424 21:11:01.583081 136648705365760 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=15] CheckpointManager Save Finalize is done on all hosts.
I0424 21:11:01.583255 136775461685056 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=15][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=15.
W0424 21:11:01.583385 136775461685056 checkpoint_manager.py:1452] Waiting for previous save to complete took 28.287471 seconds. If this number is high, consider checkpointing less frequently.
I0424 21:11:01.585060 136775461685056 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 19
I0424 21:11:01.587091 136775461685056 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_15_ocdbt_true/checkpoints/19.
I0424 21:11:02.286480 136775461685056 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0424 21:11:02.286575 136775461685056 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 21:11:02.312079 136775461685056 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.026483s
I0424 21:11:02.312257 136775461685056 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 51.292 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.030074119567871094 s) (per-host)
I0424 21:11:02.312311 136775461685056 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.030139s (batch_requests_ready=0.001756s, total_serialization_initiated=0.028313s, others=0.000070s)
I0424 21:11:02.312408 136775461685056 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.034352s (all_items=0.000010s, per_item={'items': '0.00001025'}, temp_paths=0.034342)
I0424 21:11:02.313126 136775461685056 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.73 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_15_ocdbt_true/checkpoints/19.
I0424 21:11:02.313359 136651397379840 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-24 21:31:02.313333
I0424 21:11:02.316699 136775461685056 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize
I0424 21:11:02.316910 136648705365760 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0424 21:11:02.317021 136775461685056 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260424_200834/linen_xpk_test_pipeline_scan_nnx_20260424_200834_15_ocdbt_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777065033.2958913, 'wait_for_prev_duration_secs': 28.287471294403076, 'time_between_consecutive_saves_sec': 21.52791166305542, 'checkpointer_blocking_start_time': 1777065061.5851128, 'checkpointer_blocking_duration_secs': 0.7283411026000977, 'get_old_steps_start_time': 1777065062.313468, 'get_old_steps_duration_secs': 2.288818359375e-05, 'checkpoint_manager_blocking_start_time': 1777065033.2940593, 'checkpoint_manager_blocking_duration_secs': 29.022932529449463}
I0424 21:11:02.317132 136775461685056 checkpointing.py:408] Started an asynchronous checkpoint save for step 19
I0424 21:11:02.317175 136775461685056 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0424 21:11:07.831700 136644988499712 array_metadata_store.py:203] [process=6][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_15_ocdbt_true/checkpoints/19/items/array_metadatas/process_6
I0424 21:11:44.582751 136651397379840 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 37.342 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.30053091049194 s) (per-host)
I0424 21:11:44.582871 136651397379840 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.269443s.
I0424 21:11:51.589475 136651397379840 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 49.276030s.
I0424 21:11:51.589678 136648705365760 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0424 21:11:51.589745 136648705365760 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0424 21:11:51.589791 136648705365760 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts...
I0424 21:11:51.592319 136648705365760 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts.
I0424 21:11:51.592508 136775461685056 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=19][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=19.
I0424 21:11:51.592653 136775461685056 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0424 21:11:51.593609 136775461685056 metric_logger.py:196] completed step: 19, seconds: 0.147, TFLOP/s/device: 92.237, Tokens/s/device: 13903.032, total_weights: 65536, loss: 5.391, lm_loss: 5.391, perplexity: 219.349
Per train step:
 Total TFLOPs: 13.59 
 split as 93.93% learnable weight flops and 6.07% attention flops
XPK End: Fri Apr 24 21:12:01 UTC 2026
EXIT_CODE=0