MaxView

Timing Test Reference Updates
‹ 13_scan_layers_falseCase: 14_async_ckpt_false_resume14_async_ckpt_false_save ›

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

Metricmain  59e0f1759test/pipeline-scan-nnx  5b21b66fcDiff (test/pipeline-scan-nnx − main)
Parameters1.104 billion1.104 billion—
Final loss5.39105.39100
TFLOP/s92.06192.273+0.212
Tok/s13876.413908.3+31.946
Avg s/step13.70014.078+0.378
Memory %1.381.380
JAX0.9.20.9.2—

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

main  ·  59e0f1759  ·  main_20260425_071456  ·  full log 
XPK Start: Sat Apr 25 08:02:10 UTC 2026
PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used.
`rope_parameters`'s factor field must be a float >= 1, got 40
`rope_parameters`'s beta_fast field must be a float, got 32
`rope_parameters`'s beta_slow field must be a float, got 1
DeepseekV32Config got `key=rope_scaling` in kwargs but hasn't set it as attribute. For RoPE standardization you need to set `self.rope_parameters` in model's config. 
2026-04-25 08:02:35.082081: E external/local_xla/xla/stream_executor/cuda/cuda_platform.cc:51] failed call to cuInit: INTERNAL: CUDA error: Failed call to cuInit: UNKNOWN ERROR (303)
I0425 08:02:35.289055 136968299673408 max_utils.py:273] Attempting to initialize the jax distributed system...
I0425 08:02:44.331565 136968299673408 distributed.py:149] Starting JAX distributed service on [::]:8482
I0425 08:02:44.333987 136968299673408 distributed.py:172] Connecting to JAX distributed service on mt-14-async-ckpt-false--ho85w-slice-job-0-0.mt-14-async-ckpt-false--ho85w:8482
I0425 08:02:45.217814 136968299673408 max_utils.py:284] Jax distributed system initialized!
I0425 08:02:50.203523 136968299673408 max_utils.py:800] System Information: Jax Version: 0.9.2
I0425 08:02:50.203627 136968299673408 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0425 08:02:50.203669 136968299673408 max_utils.py:802] System Information: Jax Backend: PJRT C API
TFRT TPU v6 lite
Built on Mar 4 2026 11:32:08 (1772652728) cl/878335365
I0425 08:02:50.203703 136968299673408 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0425 08:02:50.897987 136968299673408 maxtext_utils.py:1604] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1)
I0425 08:02:50.898296 136968299673408 checkpointing.py:677] Setting up checkpoint logger...
I0425 08:02:50.898353 136968299673408 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0425 08:02:50.898398 136968299673408 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0425 08:02:50.898751 136968299673408 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 0x7c91c9d1c080>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0425 08:02:52.223928 136968299673408 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0425 08:02:52.224186 136968299673408 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 0x7c7d6064c560>}, handler_registry=None
I0425 08:02:52.224435 136968299673408 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7c7d6064c560>` for item "items" and save args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>` to `_handler_registry`.
I0425 08:02:52.224484 136968299673408 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7c7d6064fb00>` for item "metrics" and save args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>` to `_handler_registry`.
I0425 08:02:52.224526 136968299673408 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 0x7c7d6064c560>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7c7d6064c560>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7c7d6064fb00>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7c7d6064fb00>}).
I0425 08:02:52.224857 136968299673408 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0425 08:02:53.675961 136850232551168 checkpoint.py:228] Read Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1777103881767797599, 'commit_timestamp_nsecs': 1777103924944501731, 'custom_metadata': {}} from gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_14_async_ckpt_false/checkpoints/0/_CHECKPOINT_METADATA
I0425 08:02:53.930001 136850232551168 checkpoint_manager.py:1871] Missing metrics for step 0
I0425 08:02:53.953696 136968299673408 checkpoint_manager.py:1812] Found 3 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_14_async_ckpt_false/checkpoints
I0425 08:02:54.433919 136968299673408 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=False, 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_20260425_071456/linen_xpk_main_20260425_071456_14_async_ckpt_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7c7d607aa6c0>
I0425 08:02:54.434137 136968299673408 checkpointing.py:301] Checkpoint manager created!
I0425 08:02:55.373572 136968299673408 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0425 08:02:55.373687 136968299673408 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0425 08:02:55.755105 136968299673408 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn').
I0425 08:02:55.755198 136968299673408 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0425 08:02:55.771872 136968299673408 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch_attn', 'activation_length_attn', 'activation_embed_attn').
I0425 08:02:55.771933 136968299673408 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0425 08:02:55.795998 136968299673408 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 08:02:55.796068 136968299673408 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 08:02:55.813006 136968299673408 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 08:02:55.813069 136968299673408 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 08:02:55.829751 136968299673408 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_length_attn', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 08:02:55.829813 136968299673408 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 08:02:55.854799 136968299673408 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch_attn', 'activation_length_attn', 'activation_heads', 'activation_kv').
I0425 08:02:55.854871 136968299673408 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 08:02:55.876310 136968299673408 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0425 08:02:55.876378 136968299673408 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0425 08:02:56.086198 136968299673408 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0425 08:02:56.086309 136968299673408 checkpointing.py:581] restoring from this run's directory step 9
I0425 08:02:56.325705 136968299673408 event_tracking.py:70] [process=6] [sync] Started load checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_14_async_ckpt_false/checkpoints/9.
I0425 08:02:56.881784 136968299673408 checkpointer.py:307] Restoring checkpoint from gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_14_async_ckpt_false/checkpoints/9.
I0425 08:02:56.882243 136968299673408 event_tracking.py:125] [process=6] [sync] Finished blocking load in 0.56 seconds. Continuing load @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_14_async_ckpt_false/checkpoints/9.
I0425 08:02:58.276228    1407 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0425 08:03:05.861376 136968299673408 jax_array_handlers.py:843] [process=6] /jax/orbax/read/worker/io/requested throughput: 208.174 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 7.591135740280151 s) (per-host)
I0425 08:03:05.867004 136968299673408 base_pytree_checkpoint_handler.py:130] [process=6] /jax/checkpoint/read/gbytes_per_sec: 197.673 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 8.006137371063232 s) (per-host)
I0425 08:03:06.630150 136968299673408 event_tracking.py:138] [process=6] [sync] Finished load in 10.30 seconds @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_14_async_ckpt_false/checkpoints/9
I0425 08:03:06.630311 136968299673408 standard_logger.py:34] {'step': 9, 'event_type': 'restore', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_14_async_ckpt_false/checkpoints', 'checkpointer_start_time': 1777104176.325625, 'checkpointer_duration_secs': 10.304653882980347, 'checkpoint_manager_start_time': 1777104176.086612, 'checkpoint_manager_duration_secs': 10.543668985366821}
fsdp: 32
I0425 08:03:07.048473 136968299673408 maxtext_utils.py:1707]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0425 08:03:07.048604 136968299673408 maxtext_utils.py:1707]  params/params/decoder/layers/mlp/wi_0/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0425 08:03:07.048658 136968299673408 maxtext_utils.py:1707]  params/params/decoder/layers/mlp/wi_1/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0425 08:03:07.048716 136968299673408 maxtext_utils.py:1707]  params/params/decoder/layers/mlp/wo/kernel
    Shape:     float32[7168,16,2048]
    Logical:   P('mlp', 'layers', 'embed')
    Physical:  (None, None, 'fsdp')
I0425 08:03:07.048770 136968299673408 maxtext_utils.py:1707]  params/params/decoder/layers/post_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0425 08:03:07.048809 136968299673408 maxtext_utils.py:1707]  params/params/decoder/layers/pre_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0425 08:03:07.048860 136968299673408 maxtext_utils.py:1707]  params/params/decoder/layers/self_attention/key/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   P('embed', 'layers', 'kv_heads', 'kv_head_dim')
    Physical:  ('fsdp', None, None, None)
I0425 08:03:07.048911 136968299673408 maxtext_utils.py:1707]  params/params/decoder/layers/self_attention/out/kernel
    Shape:     float32[16,16,128,2048]
    Logical:   P('heads', 'layers', 'kv', 'embed')
    Physical:  (None, None, None, 'fsdp')
I0425 08:03:07.048950 136968299673408 maxtext_utils.py:1707]  params/params/decoder/layers/self_attention/query/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   P('embed', 'layers', 'q_heads', 'kv')
    Physical:  ('fsdp', None, None, None)
I0425 08:03:07.048985 136968299673408 maxtext_utils.py:1707]  params/params/decoder/layers/self_attention/value/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   P('embed', 'layers', 'kv_heads', 'kv_head_dim')
    Physical:  ('fsdp', None, None, None)
I0425 08:03:07.049031 136968299673408 maxtext_utils.py:1707]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)
I0425 08:03:07.049076 136968299673408 maxtext_utils.py:1707]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')

I0425 08:03:07.535433 136968299673408 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0425 08:03:07.535525 136968299673408 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0425 08:03:07.551298 136968299673408 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0425 08:03:07.551359 136968299673408 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0425 08:03:18.668524 136968299673408 max_utils.py:791] Total memory size: 1.5 GB, Output size: 0.4 GB, Temp size: 1.1 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB.
I0425 08:03:18.669392 136968299673408 metric_logger.py:301] number parameters: 1.104 billion
I0425 08:03:29.868676 136968299673408 checkpointing.py:772] Waiting for step 10 to finish before checkpoint...
I0425 08:03:30.178912 136968299673408 checkpointing.py:776] Waited 0.3102118968963623 seconds for step 10 to finish before starting checkpointing.
I0425 08:03:30.181334 136968299673408 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0425 08:03:30.183317 136968299673408 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 10
I0425 08:03:30.184918 136968299673408 event_tracking.py:70] [process=6] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_14_async_ckpt_false/checkpoints/10.
I0425 08:03:32.674807 136968299673408 signaling_client.py:364] Using JaxDistributedSignalingClient
I0425 08:03:32.676158 136968299673408 future.py:372] [process=6][thread=MainThread][operation_id=1] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture.
I0425 08:03:34.102117 136968299673408 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0425 08:03:34.102218 136968299673408 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0425 08:03:34.384160 136968299673408 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.283098s
I0425 08:03:34.384351 136968299673408 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.365 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28752875328063965 s) (per-host)
I0425 08:03:34.384407 136968299673408 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.287596s (batch_requests_ready=0.002469s, total_serialization_initiated=0.285052s, others=0.000075s)
I0425 08:03:34.391609 136968299673408 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.716879s (all_items=0.000033s, per_item={'items': '0.00003338'}, temp_paths=1.716846)
I0425 08:03:34.391684 136968299673408 future.py:372] [process=6][thread=MainThread][operation_id=1] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture.
I0425 08:03:34.391733 136968299673408 future.py:372] [process=6][thread=MainThread][operation_id=1] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture.
I0425 08:03:36.390564 136849628571392 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_14_async_ckpt_false/checkpoints/10/items/array_metadatas/process_6
I0425 08:04:12.937456 136968299673408 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 40.669 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 38.84061050415039 s) (per-host)
I0425 08:04:18.362364 136968299673408 event_tracking.py:125] [process=6] [sync] Finished blocking save in 48.18 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_14_async_ckpt_false/checkpoints/10.
I0425 08:04:22.550919 136968299673408 event_tracking.py:138] [process=6] [sync] Finished save in 52.37 seconds @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_14_async_ckpt_false/checkpoints/10
I0425 08:04:22.553555 136968299673408 checkpoint_manager.py:2137] [process=6][thread=MainThread][step=10] CheckpointManager Save Finalize is syncing with other hosts...
I0425 08:04:22.554941 136968299673408 checkpoint_manager.py:2146] [process=6][thread=MainThread][step=10] CheckpointManager Save Finalize is done on all hosts.
I0425 08:04:22.554994 136968299673408 checkpoint_manager.py:1581] [process=6][thread=MainThread][step=10] Finished synchronous save.
I0425 08:04:22.555047 136968299673408 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1777104210.1813157, 'wait_for_prev_duration_secs': 6.198883056640625e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777104210.183358, 'checkpointer_blocking_duration_secs': 52.36768817901611, 'get_old_steps_start_time': 1777104262.5510683, 'get_old_steps_duration_secs': 4.4345855712890625e-05, 'checkpoint_manager_blocking_start_time': 1777104210.1794486, 'checkpoint_manager_blocking_duration_secs': 52.375571966171265}
I0425 08:04:22.555146 136968299673408 checkpointing.py:410] Saved a checkpoint at step 10.
I0425 08:04:22.555191 136968299673408 max_utils.py:750] 
Memstats: After params initialized:
I0425 08:04:22.555237 136968299673408 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0))
I0425 08:04:22.555267 136968299673408 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0))
I0425 08:04:22.555292 136968299673408 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0))
I0425 08:04:22.555316 136968299673408 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0))
I0425 08:04:22.887272 136968299673408 metric_logger.py:196] completed step: 10, seconds: 11.199, TFLOP/s/device: 1.213, Tokens/s/device: 182.871, total_weights: 65536, loss: 6.833, lm_loss: 6.833, perplexity: 927.869
I0425 08:04:23.032920 136968299673408 metric_logger.py:196] completed step: 11, seconds: 52.998, TFLOP/s/device: 0.256, Tokens/s/device: 38.643, total_weights: 65536, loss: 6.527, lm_loss: 6.527, perplexity: 683.659
I0425 08:04:23.180259 136968299673408 metric_logger.py:196] completed step: 12, seconds: 0.024, TFLOP/s/device: 567.715, Tokens/s/device: 85572.222, total_weights: 65536, loss: 6.265, lm_loss: 6.265, perplexity: 526.068
I0425 08:04:23.327775 136968299673408 metric_logger.py:196] completed step: 13, seconds: 0.146, TFLOP/s/device: 92.869, Tokens/s/device: 13998.155, total_weights: 65536, loss: 6.045, lm_loss: 6.045, perplexity: 422.001
I0425 08:04:23.332417 136968299673408 checkpointing.py:772] Waiting for step 15 to finish before checkpoint...
I0425 08:04:23.621930 136968299673408 checkpointing.py:776] Waited 0.2894735336303711 seconds for step 15 to finish before starting checkpointing.
I0425 08:04:23.624830 136968299673408 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0425 08:04:23.626415 136968299673408 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 15
I0425 08:04:23.628246 136968299673408 event_tracking.py:70] [process=6] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_14_async_ckpt_false/checkpoints/15.
I0425 08:04:26.048064 136968299673408 future.py:372] [process=6][thread=MainThread][operation_id=2] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture.
I0425 08:04:27.431605 136968299673408 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0425 08:04:27.431704 136968299673408 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0425 08:04:27.478476 136968299673408 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.047975s
I0425 08:04:27.478652 136968299673408 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 29.675 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.05198216438293457 s) (per-host)
I0425 08:04:27.478705 136968299673408 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.052045s (batch_requests_ready=0.001984s, total_serialization_initiated=0.049990s, others=0.000071s)
I0425 08:04:27.478804 136968299673408 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.431991s (all_items=0.000025s, per_item={'items': '0.00002503'}, temp_paths=1.431966)
I0425 08:04:27.478846 136968299673408 future.py:372] [process=6][thread=MainThread][operation_id=2] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture.
I0425 08:04:27.478883 136968299673408 future.py:372] [process=6][thread=MainThread][operation_id=2] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture.
I0425 08:04:29.500150 136849628571392 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_14_async_ckpt_false/checkpoints/15/items/array_metadatas/process_6
I0425 08:05:03.918315 136968299673408 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 43.287 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 36.49162554740906 s) (per-host)
I0425 08:05:10.423870 136968299673408 event_tracking.py:125] [process=6] [sync] Finished blocking save in 46.80 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_14_async_ckpt_false/checkpoints/15.
I0425 08:05:14.681008 136968299673408 event_tracking.py:138] [process=6] [sync] Finished save in 51.05 seconds @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_14_async_ckpt_false/checkpoints/15
I0425 08:05:14.682858 136968299673408 checkpoint_manager.py:2137] [process=6][thread=MainThread][step=15] CheckpointManager Save Finalize is syncing with other hosts...
I0425 08:05:14.684639 136968299673408 checkpoint_manager.py:2146] [process=6][thread=MainThread][step=15] CheckpointManager Save Finalize is done on all hosts.
I0425 08:05:14.684691 136968299673408 checkpoint_manager.py:1581] [process=6][thread=MainThread][step=15] Finished synchronous save.
I0425 08:05:14.684740 136968299673408 standard_logger.py:34] {'step': 15, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1777104263.6248088, 'wait_for_prev_duration_secs': 6.29425048828125e-05, 'time_between_consecutive_saves_sec': 1.0698261260986328, 'checkpointer_blocking_start_time': 1777104263.626456, 'checkpointer_blocking_duration_secs': 51.05469870567322, 'get_old_steps_start_time': 1777104314.6811767, 'get_old_steps_duration_secs': 2.47955322265625e-05, 'checkpoint_manager_blocking_start_time': 1777104263.6225984, 'checkpoint_manager_blocking_duration_secs': 51.06211757659912}
I0425 08:05:14.684826 136968299673408 checkpointing.py:410] Saved a checkpoint at step 15.
I0425 08:05:14.685649 136968299673408 metric_logger.py:196] completed step: 14, seconds: 0.147, TFLOP/s/device: 92.168, Tokens/s/device: 13892.563, total_weights: 65536, loss: 5.864, lm_loss: 5.864, perplexity: 352.193
I0425 08:05:14.709304 136968299673408 metric_logger.py:196] completed step: 15, seconds: 0.147, TFLOP/s/device: 92.122, Tokens/s/device: 13885.593, total_weights: 65536, loss: 5.719, lm_loss: 5.719, perplexity: 304.661
I0425 08:05:35.520880 136968299673408 metric_logger.py:196] completed step: 16, seconds: 51.357, TFLOP/s/device: 0.265, Tokens/s/device: 39.877, total_weights: 65536, loss: 5.605, lm_loss: 5.605, perplexity: 271.872
I0425 08:05:35.668356 136968299673408 metric_logger.py:196] completed step: 17, seconds: 20.683, TFLOP/s/device: 0.657, Tokens/s/device: 99.016, total_weights: 65536, loss: 5.517, lm_loss: 5.517, perplexity: 248.975
I0425 08:05:35.815708 136968299673408 metric_logger.py:196] completed step: 18, seconds: 0.152, TFLOP/s/device: 89.411, Tokens/s/device: 13477.053, total_weights: 65536, loss: 5.448, lm_loss: 5.448, perplexity: 232.333
I0425 08:05:35.962412 136968299673408 checkpointing.py:772] Waiting for step 19 to finish before checkpoint...
I0425 08:05:35.963086 136968299673408 checkpointing.py:776] Waited 0.0006959438323974609 seconds for step 19 to finish before starting checkpointing.
I0425 08:05:35.965229 136968299673408 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0425 08:05:35.967209 136968299673408 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 19
I0425 08:05:35.968644 136968299673408 event_tracking.py:70] [process=6] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_14_async_ckpt_false/checkpoints/19.
I0425 08:05:38.463332 136968299673408 future.py:372] [process=6][thread=MainThread][operation_id=3] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture.
I0425 08:05:39.897588 136968299673408 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0425 08:05:39.897686 136968299673408 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0425 08:05:39.941788 136968299673408 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.045251s
I0425 08:05:39.941957 136968299673408 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 31.424 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.049088478088378906 s) (per-host)
I0425 08:05:39.942007 136968299673408 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.049147s (batch_requests_ready=0.001962s, total_serialization_initiated=0.047121s, others=0.000064s)
I0425 08:05:39.948728 136968299673408 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.486737s (all_items=0.000023s, per_item={'items': '0.00002337'}, temp_paths=1.486713)
I0425 08:05:39.948796 136968299673408 future.py:372] [process=6][thread=MainThread][operation_id=3] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture.
I0425 08:05:39.948841 136968299673408 future.py:372] [process=6][thread=MainThread][operation_id=3] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture.
I0425 08:05:42.006287 136849628571392 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_14_async_ckpt_false/checkpoints/19/items/array_metadatas/process_6
I0425 08:06:17.118052 136968299673408 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 42.434 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 37.225143909454346 s) (per-host)
I0425 08:06:22.743560 136968299673408 event_tracking.py:125] [process=6] [sync] Finished blocking save in 46.78 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_14_async_ckpt_false/checkpoints/19.
I0425 08:06:26.249941 136968299673408 event_tracking.py:138] [process=6] [sync] Finished save in 50.28 seconds @ gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_14_async_ckpt_false/checkpoints/19
I0425 08:06:26.252838 136968299673408 checkpoint_manager.py:2137] [process=6][thread=MainThread][step=19] CheckpointManager Save Finalize is syncing with other hosts...
I0425 08:06:26.254546 136968299673408 checkpoint_manager.py:2146] [process=6][thread=MainThread][step=19] CheckpointManager Save Finalize is done on all hosts.
I0425 08:06:26.254595 136968299673408 checkpoint_manager.py:1581] [process=6][thread=MainThread][step=19] Finished synchronous save.
I0425 08:06:26.254644 136968299673408 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260425_071456/linen_xpk_main_20260425_071456_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1777104335.9652138, 'wait_for_prev_duration_secs': 6.127357482910156e-05, 'time_between_consecutive_saves_sec': 21.28053331375122, 'checkpointer_blocking_start_time': 1777104335.9672482, 'checkpointer_blocking_duration_secs': 50.28281211853027, 'get_old_steps_start_time': 1777104386.2500753, 'get_old_steps_duration_secs': 5.626678466796875e-05, 'checkpoint_manager_blocking_start_time': 1777104335.9633408, 'checkpoint_manager_blocking_duration_secs': 50.29128074645996}
I0425 08:06:26.254750 136968299673408 checkpointing.py:410] Saved a checkpoint at step 19.
I0425 08:06:26.254789 136968299673408 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0425 08:06:26.254826 136968299673408 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0425 08:06:26.255567 136968299673408 metric_logger.py:196] completed step: 19, seconds: 0.148, TFLOP/s/device: 92.061, Tokens/s/device: 13876.373, 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: Sat Apr 25 08:06:35 UTC 2026
EXIT_CODE=0
test/pipeline-scan-nnx  ·  5b21b66fc  ·  test_pipeline_scan_nnx_20260425_201227  ·  full log 
XPK Start: Sat Apr 25 20:59:14 UTC 2026
PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used.
`rope_parameters`'s factor field must be a float >= 1, got 40
`rope_parameters`'s beta_fast field must be a float, got 32
`rope_parameters`'s beta_slow field must be a float, got 1
DeepseekV32Config got `key=rope_scaling` in kwargs but hasn't set it as attribute. For RoPE standardization you need to set `self.rope_parameters` in model's config. 
2026-04-25 20:59:39.341328: E external/local_xla/xla/stream_executor/cuda/cuda_platform.cc:51] failed call to cuInit: INTERNAL: CUDA error: Failed call to cuInit: UNKNOWN ERROR (303)
I0425 20:59:39.559134 134225021404992 max_utils.py:273] Attempting to initialize the jax distributed system...
I0425 20:59:48.600970 134225021404992 distributed.py:149] Starting JAX distributed service on [::]:8482
I0425 20:59:48.603407 134225021404992 distributed.py:172] Connecting to JAX distributed service on mt-14-async-ckpt-false--cvk9u-slice-job-0-0.mt-14-async-ckpt-false--cvk9u:8482
I0425 20:59:49.369335 134225021404992 max_utils.py:284] Jax distributed system initialized!
I0425 20:59:55.444194 134225021404992 max_utils.py:800] System Information: Jax Version: 0.9.2
I0425 20:59:55.444302 134225021404992 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0425 20:59:55.444343 134225021404992 max_utils.py:802] System Information: Jax Backend: PJRT C API
TFRT TPU v6 lite
Built on Mar 4 2026 11:32:08 (1772652728) cl/878335365
I0425 20:59:55.444378 134225021404992 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0425 20:59:56.140246 134225021404992 maxtext_utils.py:1565] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0425 20:59:56.140533 134225021404992 checkpointing.py:677] Setting up checkpoint logger...
I0425 20:59:56.140594 134225021404992 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0425 20:59:56.140640 134225021404992 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0425 20:59:56.140987 134225021404992 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 0x7a1311b18ef0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0425 20:59:57.832758 134225021404992 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0425 20:59:57.833003 134225021404992 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 0x79feb4473a70>}, handler_registry=None
I0425 20:59:57.833261 134225021404992 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x79feb4473a70>` for item "items" and save args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>` to `_handler_registry`.
I0425 20:59:57.833313 134225021404992 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x79feb44758e0>` for item "metrics" and save args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>` to `_handler_registry`.
I0425 20:59:57.833349 134225021404992 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 0x79feb4473a70>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x79feb4473a70>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x79feb44758e0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x79feb44758e0>}).
I0425 20:59:57.833683 134225021404992 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0425 20:59:59.702364 134103600965376 checkpoint.py:228] Read Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1777150507208118641, 'commit_timestamp_nsecs': 1777150551064713164, 'custom_metadata': {}} from gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/0/_CHECKPOINT_METADATA
I0425 20:59:59.946142 134103600965376 checkpoint_manager.py:1871] Missing metrics for step 0
I0425 21:00:00.180845 134225021404992 checkpoint_manager.py:1812] Found 3 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints
I0425 21:00:00.444229 134225021404992 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=False, 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_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x79feb4472db0>
I0425 21:00:00.444408 134225021404992 checkpointing.py:301] Checkpoint manager created!
I0425 21:00:01.368747 134225021404992 nnx_wrappers.py:453] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0425 21:00:01.368866 134225021404992 nnx_wrappers.py:453] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0425 21:00:01.762180 134225021404992 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0425 21:00:01.762282 134225021404992 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0425 21:00:01.779229 134225021404992 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0425 21:00:01.779295 134225021404992 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0425 21:00:01.803421 134225021404992 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 21:00:01.803488 134225021404992 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 21:00:01.820457 134225021404992 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 21:00:01.820520 134225021404992 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 21:00:01.837506 134225021404992 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0425 21:00:01.837570 134225021404992 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 21:00:01.863224 134225021404992 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0425 21:00:01.863297 134225021404992 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0425 21:00:01.884846 134225021404992 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0425 21:00:01.884916 134225021404992 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0425 21:00:02.102526 134225021404992 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0425 21:00:02.102640 134225021404992 checkpointing.py:581] restoring from this run's directory step 9
I0425 21:00:02.355227 134225021404992 event_tracking.py:70] [process=6] [sync] Started load checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/9.
I0425 21:00:02.601644 134225021404992 checkpointer.py:307] Restoring checkpoint from gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/9.
I0425 21:00:02.602078 134225021404992 event_tracking.py:125] [process=6] [sync] Finished blocking load in 0.25 seconds. Continuing load @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/9.
I0425 21:00:04.249997    1456 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0425 21:00:10.686643 134225021404992 jax_array_handlers.py:843] [process=6] /jax/orbax/read/worker/io/requested throughput: 245.286 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 6.44258713722229 s) (per-host)
I0425 21:00:10.691935 134225021404992 base_pytree_checkpoint_handler.py:130] [process=6] /jax/checkpoint/read/gbytes_per_sec: 231.123 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 6.847394943237305 s) (per-host)
I0425 21:00:11.852776 134225021404992 event_tracking.py:138] [process=6] [sync] Finished load in 9.50 seconds @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/9
I0425 21:00:11.852934 134225021404992 standard_logger.py:34] {'step': 9, 'event_type': 'restore', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints', 'checkpointer_start_time': 1777150802.3551452, 'checkpointer_duration_secs': 9.497756004333496, 'checkpoint_manager_start_time': 1777150802.10289, 'checkpoint_manager_duration_secs': 9.750012636184692}
fsdp: 32
I0425 21:00:12.280622 134225021404992 maxtext_utils.py:1668]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0425 21:00:12.280747 134225021404992 maxtext_utils.py:1668]  params/params/decoder/layers/mlp/wi_0/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0425 21:00:12.280800 134225021404992 maxtext_utils.py:1668]  params/params/decoder/layers/mlp/wi_1/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0425 21:00:12.280857 134225021404992 maxtext_utils.py:1668]  params/params/decoder/layers/mlp/wo/kernel
    Shape:     float32[7168,16,2048]
    Logical:   P('mlp', 'layers', 'embed')
    Physical:  (None, None, 'fsdp')
I0425 21:00:12.280912 134225021404992 maxtext_utils.py:1668]  params/params/decoder/layers/post_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0425 21:00:12.280951 134225021404992 maxtext_utils.py:1668]  params/params/decoder/layers/pre_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0425 21:00:12.281004 134225021404992 maxtext_utils.py:1668]  params/params/decoder/layers/self_attention/key/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   P('embed', 'layers', 'kv_heads', 'kv_head_dim')
    Physical:  ('fsdp', None, None, None)
I0425 21:00:12.281055 134225021404992 maxtext_utils.py:1668]  params/params/decoder/layers/self_attention/out/kernel
    Shape:     float32[16,16,128,2048]
    Logical:   P('heads', 'layers', 'kv', 'embed')
    Physical:  (None, None, None, 'fsdp')
I0425 21:00:12.281106 134225021404992 maxtext_utils.py:1668]  params/params/decoder/layers/self_attention/query/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   P('embed', 'layers', 'q_heads', 'kv')
    Physical:  ('fsdp', None, None, None)
I0425 21:00:12.281147 134225021404992 maxtext_utils.py:1668]  params/params/decoder/layers/self_attention/value/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   P('embed', 'layers', 'kv_heads', 'kv_head_dim')
    Physical:  ('fsdp', None, None, None)
I0425 21:00:12.281195 134225021404992 maxtext_utils.py:1668]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)

I0425 21:00:12.281242 134225021404992 maxtext_utils.py:1668]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')
I0425 21:00:12.775359 134225021404992 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0425 21:00:12.775453 134225021404992 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0425 21:00:12.791359 134225021404992 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0425 21:00:12.791419 134225021404992 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0425 21:00:24.002365 134225021404992 max_utils.py:791] Total memory size: 1.5 GB, Output size: 0.4 GB, Temp size: 1.1 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB.
I0425 21:00:24.003205 134225021404992 metric_logger.py:301] number parameters: 1.104 billion
I0425 21:00:35.487599 134225021404992 checkpointing.py:772] Waiting for step 10 to finish before checkpoint...
I0425 21:00:35.643734 134225021404992 checkpointing.py:776] Waited 0.15611648559570312 seconds for step 10 to finish before starting checkpointing.
I0425 21:00:35.645980 134225021404992 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0425 21:00:35.647878 134225021404992 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 10
I0425 21:00:35.649257 134225021404992 event_tracking.py:70] [process=6] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/10.
I0425 21:00:38.208979 134225021404992 signaling_client.py:364] Using JaxDistributedSignalingClient
I0425 21:00:38.210449 134225021404992 future.py:372] [process=6][thread=MainThread][operation_id=1] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture.
I0425 21:00:39.623412 134225021404992 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0425 21:00:39.623510 134225021404992 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0425 21:00:39.905418 134225021404992 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.283042s
I0425 21:00:39.905615 134225021404992 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.371 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28720808029174805 s) (per-host)
I0425 21:00:39.905673 134225021404992 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.287277s (batch_requests_ready=0.002352s, total_serialization_initiated=0.284842s, others=0.000083s)
I0425 21:00:39.905775 134225021404992 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.696884s (all_items=0.000034s, per_item={'items': '0.00003409'}, temp_paths=1.696850)
I0425 21:00:39.905822 134225021404992 future.py:372] [process=6][thread=MainThread][operation_id=1] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture.
I0425 21:00:39.905864 134225021404992 future.py:372] [process=6][thread=MainThread][operation_id=1] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture.
I0425 21:00:41.962961 134103005378304 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_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/10/items/array_metadatas/process_6
I0425 21:01:19.361624 134225021404992 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 39.745 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 39.74317502975464 s) (per-host)
I0425 21:01:24.692238 134225021404992 event_tracking.py:125] [process=6] [sync] Finished blocking save in 49.04 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/10.
I0425 21:01:29.619309 134225021404992 event_tracking.py:138] [process=6] [sync] Finished save in 53.97 seconds @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/10
I0425 21:01:29.621629 134225021404992 checkpoint_manager.py:2137] [process=6][thread=MainThread][step=10] CheckpointManager Save Finalize is syncing with other hosts...
I0425 21:01:29.623073 134225021404992 checkpoint_manager.py:2146] [process=6][thread=MainThread][step=10] CheckpointManager Save Finalize is done on all hosts.
I0425 21:01:29.623136 134225021404992 checkpoint_manager.py:1581] [process=6][thread=MainThread][step=10] Finished synchronous save.
I0425 21:01:29.623189 134225021404992 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1777150835.645962, 'wait_for_prev_duration_secs': 6.175041198730469e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777150835.6479166, 'checkpointer_blocking_duration_secs': 53.97151446342468, 'get_old_steps_start_time': 1777150889.619452, 'get_old_steps_duration_secs': 2.6226043701171875e-05, 'checkpoint_manager_blocking_start_time': 1777150835.6442668, 'checkpoint_manager_blocking_duration_secs': 53.97889566421509}
I0425 21:01:29.623276 134225021404992 checkpointing.py:410] Saved a checkpoint at step 10.
I0425 21:01:29.623320 134225021404992 max_utils.py:750] 
Memstats: After params initialized:
I0425 21:01:29.623369 134225021404992 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0))
I0425 21:01:29.623400 134225021404992 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0))
I0425 21:01:29.623425 134225021404992 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0))
I0425 21:01:29.623446 134225021404992 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0))
I0425 21:01:29.933836 134225021404992 metric_logger.py:196] completed step: 10, seconds: 11.484, TFLOP/s/device: 1.183, Tokens/s/device: 178.331, total_weights: 65536, loss: 6.833, lm_loss: 6.833, perplexity: 927.869
I0425 21:01:30.123328 134225021404992 metric_logger.py:196] completed step: 11, seconds: 54.445, TFLOP/s/device: 0.250, Tokens/s/device: 37.616, total_weights: 65536, loss: 6.527, lm_loss: 6.527, perplexity: 683.659
I0425 21:01:30.270948 134225021404992 metric_logger.py:196] completed step: 12, seconds: 0.042, TFLOP/s/device: 321.323, Tokens/s/device: 48433.251, total_weights: 65536, loss: 6.265, lm_loss: 6.265, perplexity: 526.068
I0425 21:01:30.418486 134225021404992 metric_logger.py:196] completed step: 13, seconds: 0.154, TFLOP/s/device: 88.380, Tokens/s/device: 13321.538, total_weights: 65536, loss: 6.045, lm_loss: 6.045, perplexity: 422.001
I0425 21:01:30.423478 134225021404992 checkpointing.py:772] Waiting for step 15 to finish before checkpoint...
I0425 21:01:30.712527 134225021404992 checkpointing.py:776] Waited 0.289013147354126 seconds for step 15 to finish before starting checkpointing.
I0425 21:01:30.715493 134225021404992 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0425 21:01:30.717121 134225021404992 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 15
I0425 21:01:30.718940 134225021404992 event_tracking.py:70] [process=6] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/15.
I0425 21:01:33.592566 134225021404992 future.py:372] [process=6][thread=MainThread][operation_id=2] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture.
I0425 21:01:34.970386 134225021404992 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0425 21:01:34.970485 134225021404992 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0425 21:01:34.997630 134225021404992 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.028369s
I0425 21:01:34.997811 134225021404992 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 47.825 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.03225445747375488 s) (per-host)
I0425 21:01:34.997868 134225021404992 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.032322s (batch_requests_ready=0.001815s, total_serialization_initiated=0.030433s, others=0.000074s)
I0425 21:01:34.997974 134225021404992 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.406678s (all_items=0.000026s, per_item={'items': '0.00002599'}, temp_paths=1.406652)
I0425 21:01:34.998016 134225021404992 future.py:372] [process=6][thread=MainThread][operation_id=2] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture.
I0425 21:01:34.998055 134225021404992 future.py:372] [process=6][thread=MainThread][operation_id=2] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture.
I0425 21:01:37.912745 134103005378304 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_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/15/items/array_metadatas/process_6
I0425 21:02:14.108590 134225021404992 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 40.355 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 39.14298057556152 s) (per-host)
I0425 21:02:19.435531 134225021404992 event_tracking.py:125] [process=6] [sync] Finished blocking save in 48.72 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/15.
I0425 21:02:23.490252 134225021404992 event_tracking.py:138] [process=6] [sync] Finished save in 52.77 seconds @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/15
I0425 21:02:23.492156 134225021404992 checkpoint_manager.py:2137] [process=6][thread=MainThread][step=15] CheckpointManager Save Finalize is syncing with other hosts...
I0425 21:02:23.493766 134225021404992 checkpoint_manager.py:2146] [process=6][thread=MainThread][step=15] CheckpointManager Save Finalize is done on all hosts.
I0425 21:02:23.493818 134225021404992 checkpoint_manager.py:1581] [process=6][thread=MainThread][step=15] Finished synchronous save.
I0425 21:02:23.493869 134225021404992 standard_logger.py:34] {'step': 15, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1777150890.715472, 'wait_for_prev_duration_secs': 6.389617919921875e-05, 'time_between_consecutive_saves_sec': 1.0923471450805664, 'checkpointer_blocking_start_time': 1777150890.7171583, 'checkpointer_blocking_duration_secs': 52.773212909698486, 'get_old_steps_start_time': 1777150943.4903922, 'get_old_steps_duration_secs': 2.5987625122070312e-05, 'checkpoint_manager_blocking_start_time': 1777150890.713154, 'checkpoint_manager_blocking_duration_secs': 52.78069019317627}
I0425 21:02:23.493958 134225021404992 checkpointing.py:410] Saved a checkpoint at step 15.
I0425 21:02:23.494781 134225021404992 metric_logger.py:196] completed step: 14, seconds: 0.148, TFLOP/s/device: 91.963, Tokens/s/device: 13861.721, total_weights: 65536, loss: 5.864, lm_loss: 5.864, perplexity: 352.193
I0425 21:02:23.500839 134225021404992 metric_logger.py:196] completed step: 15, seconds: 0.147, TFLOP/s/device: 92.159, Tokens/s/device: 13891.150, total_weights: 65536, loss: 5.719, lm_loss: 5.719, perplexity: 304.661
I0425 21:02:44.630048 134225021404992 metric_logger.py:196] completed step: 16, seconds: 53.076, TFLOP/s/device: 0.256, Tokens/s/device: 38.586, total_weights: 65536, loss: 5.605, lm_loss: 5.605, perplexity: 271.872
I0425 21:02:44.777489 134225021404992 metric_logger.py:196] completed step: 17, seconds: 20.983, TFLOP/s/device: 0.648, Tokens/s/device: 97.603, total_weights: 65536, loss: 5.517, lm_loss: 5.517, perplexity: 248.975
I0425 21:02:44.925015 134225021404992 metric_logger.py:196] completed step: 18, seconds: 0.153, TFLOP/s/device: 88.984, Tokens/s/device: 13412.709, total_weights: 65536, loss: 5.448, lm_loss: 5.448, perplexity: 232.333
I0425 21:02:45.071596 134225021404992 checkpointing.py:772] Waiting for step 19 to finish before checkpoint...
I0425 21:02:45.072365 134225021404992 checkpointing.py:776] Waited 0.0007889270782470703 seconds for step 19 to finish before starting checkpointing.
I0425 21:02:45.074395 134225021404992 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0425 21:02:45.076284 134225021404992 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 19
I0425 21:02:45.077745 134225021404992 event_tracking.py:70] [process=6] [sync] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/19.
I0425 21:02:47.859803 134225021404992 future.py:372] [process=6][thread=MainThread][operation_id=3] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture.
I0425 21:02:49.266358 134225021404992 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0425 21:02:49.266455 134225021404992 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0425 21:02:49.293175 134225021404992 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.027805s
I0425 21:02:49.293326 134225021404992 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 48.948 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.031514644622802734 s) (per-host)
I0425 21:02:49.293379 134225021404992 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.031576s (batch_requests_ready=0.001805s, total_serialization_initiated=0.029706s, others=0.000066s)
I0425 21:02:49.293462 134225021404992 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 1.434856s (all_items=0.000027s, per_item={'items': '0.00002742'}, temp_paths=1.434829)
I0425 21:02:49.293502 134225021404992 future.py:372] [process=6][thread=MainThread][operation_id=3] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture.
I0425 21:02:49.293539 134225021404992 future.py:372] [process=6][thread=MainThread][operation_id=3] _SignalingThread.join() waiting for signals ([]) blocking the main thread will slow down blocking save times. This is likely due to main thread calling result() on a CommitFuture.
I0425 21:02:51.405721 134103005378304 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_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/19/items/array_metadatas/process_6
I0425 21:03:27.684902 134225021404992 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 41.111 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 38.42304992675781 s) (per-host)
I0425 21:03:33.355774 134225021404992 event_tracking.py:125] [process=6] [sync] Finished blocking save in 48.28 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/19.
I0425 21:03:38.580350 134225021404992 event_tracking.py:138] [process=6] [sync] Finished save in 53.50 seconds @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints/19
I0425 21:03:38.582892 134225021404992 checkpoint_manager.py:2137] [process=6][thread=MainThread][step=19] CheckpointManager Save Finalize is syncing with other hosts...
I0425 21:03:38.584690 134225021404992 checkpoint_manager.py:2146] [process=6][thread=MainThread][step=19] CheckpointManager Save Finalize is done on all hosts.
I0425 21:03:38.584740 134225021404992 checkpoint_manager.py:1581] [process=6][thread=MainThread][step=19] Finished synchronous save.
I0425 21:03:38.584789 134225021404992 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260425_201227/linen_xpk_test_pipeline_scan_nnx_20260425_201227_14_async_ckpt_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': True, 'wait_for_prev_start_time': 1777150965.0743783, 'wait_for_prev_duration_secs': 5.841255187988281e-05, 'time_between_consecutive_saves_sec': 21.5805721282959, 'checkpointer_blocking_start_time': 1777150965.076322, 'checkpointer_blocking_duration_secs': 53.504148721694946, 'get_old_steps_start_time': 1777151018.5804849, 'get_old_steps_duration_secs': 2.1696090698242188e-05, 'checkpoint_manager_blocking_start_time': 1777150965.072605, 'checkpoint_manager_blocking_duration_secs': 53.51216125488281}
I0425 21:03:38.584875 134225021404992 checkpointing.py:410] Saved a checkpoint at step 19.
I0425 21:03:38.584905 134225021404992 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0425 21:03:38.584936 134225021404992 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0425 21:03:38.585591 134225021404992 metric_logger.py:196] completed step: 19, seconds: 0.147, TFLOP/s/device: 92.273, Tokens/s/device: 13908.319, 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: Sat Apr 25 21:03:49 UTC 2026
EXIT_CODE=0