MaxView

XPK Start: Thu Apr 23 22:33:21 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. 
2026-04-23 22:33:46.823049: E external/local_xla/xla/stream_executor/cuda/cuda_platform.cc:51] failed call to cuInit: INTERNAL: CUDA error: Failed call to cuInit: UNKNOWN ERROR (303)
I0423 22:33:47.032440 138008444487488 max_utils.py:273] Attempting to initialize the jax distributed system...
I0423 22:33:56.072004 138008444487488 distributed.py:149] Starting JAX distributed service on [::]:8482
I0423 22:33:56.074376 138008444487488 distributed.py:172] Connecting to JAX distributed service on mt-16-zarr3-true-rs-lz41g-slice-job-0-0.mt-16-zarr3-true-rs-lz41g:8482
I0423 22:33:57.098682 138008444487488 max_utils.py:284] Jax distributed system initialized!
I0423 22:34:03.387938 138008444487488 max_utils.py:800] System Information: Jax Version: 0.9.2
I0423 22:34:03.388047 138008444487488 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0423 22:34:03.388087 138008444487488 max_utils.py:802] System Information: Jax Backend: PJRT C API
TFRT TPU v6 lite
Built on Mar 4 2026 11:32:08 (1772652728) cl/878335365
I0423 22:34:03.388146 138008444487488 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0423 22:34:04.096839 138008444487488 maxtext_utils.py:1565] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0423 22:34:04.097137 138008444487488 checkpointing.py:677] Setting up checkpoint logger...
I0423 22:34:04.097192 138008444487488 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0423 22:34:04.097238 138008444487488 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0423 22:34:04.097593 138008444487488 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 0x7d83fa518b60>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0423 22:34:05.440478 138008444487488 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0423 22:34:05.440747 138008444487488 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 0x7d6fe8297650>}, handler_registry=None
I0423 22:34:05.441009 138008444487488 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d6fe8297650>` for item "items" and save args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>` to `_handler_registry`.
I0423 22:34:05.441072 138008444487488 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d6fe829cad0>` for item "metrics" and save args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>` and restore args `<class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>` to `_handler_registry`.
I0423 22:34:05.441139 138008444487488 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 0x7d6fe8297650>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d6fe8297650>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d6fe829cad0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d6fe829cad0>}).
I0423 22:34:05.441481 138008444487488 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0423 22:34:05.441579 138008444487488 async_checkpointer.py:192] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7d6fc83772e0> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0423 22:34:07.279561 137887836268288 checkpoint.py:228] Read Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776983481449303052, 'commit_timestamp_nsecs': 1776983528318640948, 'custom_metadata': {}} from gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_16_zarr3_true/checkpoints/9/_CHECKPOINT_METADATA
I0423 22:34:07.529431 137887836268288 checkpoint_manager.py:1871] Missing metrics for step 9
I0423 22:34:08.785567 138008444487488 checkpoint_manager.py:1812] Found 3 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_16_zarr3_true/checkpoints
I0423 22:34:08.788090 138008444487488 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_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_16_zarr3_true/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7d6fe8297710>
I0423 22:34:08.788229 138008444487488 checkpointing.py:301] Checkpoint manager created!
I0423 22:34:09.739743 138008444487488 nnx_wrappers.py:453] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0423 22:34:09.739861 138008444487488 nnx_wrappers.py:453] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0423 22:34:10.124734 138008444487488 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0423 22:34:10.124827 138008444487488 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0423 22:34:10.141326 138008444487488 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0423 22:34:10.141388 138008444487488 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0423 22:34:10.165181 138008444487488 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0423 22:34:10.165249 138008444487488 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0423 22:34:10.181896 138008444487488 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0423 22:34:10.181959 138008444487488 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0423 22:34:10.198484 138008444487488 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0423 22:34:10.198546 138008444487488 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0423 22:34:10.223393 138008444487488 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0423 22:34:10.223464 138008444487488 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0423 22:34:10.244904 138008444487488 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0423 22:34:10.244973 138008444487488 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0423 22:34:10.464484 138008444487488 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0423 22:34:10.464596 138008444487488 checkpointing.py:581] restoring from this run's directory step 9
I0423 22:34:10.715615 138008444487488 event_tracking.py:70] [process=6] [sync] Started load checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_16_zarr3_true/checkpoints/9.
I0423 22:34:10.961522 138008444487488 checkpointer.py:307] Restoring checkpoint from gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_16_zarr3_true/checkpoints/9.
I0423 22:34:10.961955 138008444487488 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_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_16_zarr3_true/checkpoints/9.
I0423 22:34:12.404446    1443 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0423 22:34:18.118449 138008444487488 jax_array_handlers.py:843] [process=6] /jax/orbax/read/worker/io/requested throughput: 276.279 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 5.71984338760376 s) (per-host)
I0423 22:34:18.123024 138008444487488 base_pytree_checkpoint_handler.py:130] [process=6] /jax/checkpoint/read/gbytes_per_sec: 256.761 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 6.163677453994751 s) (per-host)
I0423 22:34:21.267321 138008444487488 event_tracking.py:138] [process=6] [sync] Finished load in 10.55 seconds @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_16_zarr3_true/checkpoints/9
I0423 22:34:21.267477 138008444487488 standard_logger.py:34] {'step': 9, 'event_type': 'restore', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_16_zarr3_true/checkpoints', 'checkpointer_start_time': 1776983650.7155178, 'checkpointer_duration_secs': 10.551926374435425, 'checkpoint_manager_start_time': 1776983650.464841, 'checkpoint_manager_duration_secs': 10.802605390548706}
fsdp: 32
I0423 22:34:21.690464 138008444487488 maxtext_utils.py:1668]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0423 22:34:21.690601 138008444487488 maxtext_utils.py:1668]  params/params/decoder/layers/mlp/wi_0/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0423 22:34:21.690655 138008444487488 maxtext_utils.py:1668]  params/params/decoder/layers/mlp/wi_1/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0423 22:34:21.690716 138008444487488 maxtext_utils.py:1668]  params/params/decoder/layers/mlp/wo/kernel
    Shape:     float32[7168,16,2048]
    Logical:   P('mlp', 'layers', 'embed')
    Physical:  (None, None, 'fsdp')
I0423 22:34:21.690769 138008444487488 maxtext_utils.py:1668]  params/params/decoder/layers/post_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0423 22:34:21.690805 138008444487488 maxtext_utils.py:1668]  params/params/decoder/layers/pre_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0423 22:34:21.690855 138008444487488 maxtext_utils.py:1668]  params/params/decoder/layers/self_attention/key/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   P('embed', 'layers', 'kv_heads', 'kv_head_dim')
    Physical:  ('fsdp', None, None, None)
I0423 22:34:21.690905 138008444487488 maxtext_utils.py:1668]  params/params/decoder/layers/self_attention/out/kernel
    Shape:     float32[16,16,128,2048]
    Logical:   P('heads', 'layers', 'kv', 'embed')
    Physical:  (None, None, None, 'fsdp')
I0423 22:34:21.690942 138008444487488 maxtext_utils.py:1668]  params/params/decoder/layers/self_attention/query/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   P('embed', 'layers', 'q_heads', 'kv')
    Physical:  ('fsdp', None, None, None)
I0423 22:34:21.690975 138008444487488 maxtext_utils.py:1668]  params/params/decoder/layers/self_attention/value/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   P('embed', 'layers', 'kv_heads', 'kv_head_dim')
    Physical:  ('fsdp', None, None, None)
I0423 22:34:21.691020 138008444487488 maxtext_utils.py:1668]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]

    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)
I0423 22:34:21.691063 138008444487488 maxtext_utils.py:1668]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')
I0423 22:34:22.180078 138008444487488 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0423 22:34:22.180186 138008444487488 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0423 22:34:22.196008 138008444487488 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0423 22:34:22.196069 138008444487488 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0423 22:34:33.305649 138008444487488 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.
I0423 22:34:33.306425 138008444487488 metric_logger.py:301] number parameters: 1.104 billion
I0423 22:34:44.518948 138008444487488 checkpointing.py:772] Waiting for step 10 to finish before checkpoint...
I0423 22:34:44.672433 138008444487488 checkpointing.py:776] Waited 0.15346884727478027 seconds for step 10 to finish before starting checkpointing.
I0423 22:34:44.674869 138008444487488 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0423 22:34:44.676834 138008444487488 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 10
I0423 22:34:44.678447 138008444487488 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_16_zarr3_true/checkpoints/10.
I0423 22:34:45.016804 138008444487488 signaling_client.py:364] Using JaxDistributedSignalingClient
I0423 22:34:45.017808 138008444487488 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0423 22:34:45.017862 138008444487488 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0423 22:34:45.296125 138008444487488 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.279396s
I0423 22:34:45.296297 138008444487488 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.446 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28326940536499023 s) (per-host)
I0423 22:34:45.296349 138008444487488 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.283332s (batch_requests_ready=0.002163s, total_serialization_initiated=0.281094s, others=0.000076s)
I0423 22:34:45.296438 138008444487488 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.287391s (all_items=0.000018s, per_item={'items': '0.00001764'}, temp_paths=0.287374)
I0423 22:34:45.297168 138008444487488 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.62 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_16_zarr3_true/checkpoints/10.
I0423 22:34:45.297452 137887039354624 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 22:54:45.297427
I0423 22:34:45.301348 138008444487488 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize
I0423 22:34:45.301626 137883208038144 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0423 22:34:45.301777 138008444487488 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_16_zarr3_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776983684.6748512, 'wait_for_prev_duration_secs': 6.127357482910156e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776983684.676877, 'checkpointer_blocking_duration_secs': 0.6206891536712646, 'get_old_steps_start_time': 1776983685.2975876, 'get_old_steps_duration_secs': 3.6716461181640625e-05, 'checkpoint_manager_blocking_start_time': 1776983684.6729603, 'checkpoint_manager_blocking_duration_secs': 0.6287808418273926}
I0423 22:34:45.301891 138008444487488 checkpointing.py:408] Started an asynchronous checkpoint save for step 10
I0423 22:34:45.301939 138008444487488 max_utils.py:750] 
Memstats: After params initialized:
I0423 22:34:45.301992 138008444487488 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0))
I0423 22:34:45.302026 138008444487488 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0))
I0423 22:34:45.302052 138008444487488 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0))
I0423 22:34:45.302076 138008444487488 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0))
I0423 22:34:45.615519 138008444487488 metric_logger.py:196] completed step: 10, seconds: 11.212, TFLOP/s/device: 1.212, Tokens/s/device: 182.655, total_weights: 65536, loss: 6.833, lm_loss: 6.833, perplexity: 927.869
I0423 22:34:45.792805 138008444487488 metric_logger.py:196] completed step: 11, seconds: 1.095, TFLOP/s/device: 12.408, Tokens/s/device: 1870.309, total_weights: 65536, loss: 6.527, lm_loss: 6.527, perplexity: 683.659
I0423 22:34:45.940158 138008444487488 metric_logger.py:196] completed step: 12, seconds: 0.030, TFLOP/s/device: 451.670, Tokens/s/device: 68080.580, total_weights: 65536, loss: 6.265, lm_loss: 6.265, perplexity: 526.068
I0423 22:34:46.087540 138008444487488 metric_logger.py:196] completed step: 13, seconds: 0.153, TFLOP/s/device: 88.604, Tokens/s/device: 13355.331, total_weights: 65536, loss: 6.045, lm_loss: 6.045, perplexity: 422.001
I0423 22:34:46.092088 138008444487488 checkpointing.py:772] Waiting for step 15 to finish before checkpoint...
I0423 22:34:46.381535 138008444487488 checkpointing.py:776] Waited 0.2894172668457031 seconds for step 15 to finish before starting checkpointing.
I0423 22:34:46.385365 138008444487488 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0423 22:34:50.143511 137883717449472 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_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_16_zarr3_true/checkpoints/10/items/array_metadatas/process_6
I0423 22:35:32.282924 137887039354624 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 33.417 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 47.269877910614014 s) (per-host)
I0423 22:35:32.283031 137887039354624 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 46.985502s.
I0423 22:35:38.194594 137887039354624 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 52.897048s.
I0423 22:35:38.194907 137883208038144 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0423 22:35:38.195021 137883208038144 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0423 22:35:38.195069 137883208038144 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts...
I0423 22:35:38.197633 137883208038144 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts.
I0423 22:35:38.197822 138008444487488 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.
W0423 22:35:38.197962 138008444487488 checkpoint_manager.py:1452] Waiting for previous save to complete took 51.812596 seconds. If this number is high, consider checkpointing less frequently.
I0423 22:35:38.199954 138008444487488 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 15
I0423 22:35:38.202418 138008444487488 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_16_zarr3_true/checkpoints/15.
I0423 22:35:38.897402 138008444487488 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0423 22:35:38.897496 138008444487488 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0423 22:35:38.923343 138008444487488 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.027205s
I0423 22:35:38.923475 138008444487488 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 50.425 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.030591487884521484 s) (per-host)
I0423 22:35:38.923522 138008444487488 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.030648s (batch_requests_ready=0.001761s, total_serialization_initiated=0.028825s, others=0.000063s)
I0423 22:35:38.923605 138008444487488 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.035378s (all_items=0.000012s, per_item={'items': '0.00001240'}, temp_paths=0.035366)
I0423 22:35:38.924304 138008444487488 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.72 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_16_zarr3_true/checkpoints/15.
I0423 22:35:38.924636 137883208038144 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 22:55:38.924599
I0423 22:35:38.935052 138008444487488 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=15] Starting CheckpointManager Save Finalize thread=save_finalize
I0423 22:35:38.935318 137883199645440 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0423 22:35:38.935450 138008444487488 standard_logger.py:34] {'step': 15, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_16_zarr3_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776983686.385336, 'wait_for_prev_duration_secs': 51.8125958442688, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776983738.1999922, 'checkpointer_blocking_duration_secs': 0.724783182144165, 'get_old_steps_start_time': 1776983738.9248009, 'get_old_steps_duration_secs': 3.0279159545898438e-05, 'checkpoint_manager_blocking_start_time': 1776983686.3821735, 'checkpoint_manager_blocking_duration_secs': 52.55324363708496}
I0423 22:35:38.935573 138008444487488 checkpointing.py:408] Started an asynchronous checkpoint save for step 15
I0423 22:35:38.936384 138008444487488 metric_logger.py:196] completed step: 14, seconds: 0.147, TFLOP/s/device: 92.152, Tokens/s/device: 13890.113, total_weights: 65536, loss: 5.864, lm_loss: 5.864, perplexity: 352.193
I0423 22:35:38.943665 138008444487488 metric_logger.py:196] completed step: 15, seconds: 0.147, TFLOP/s/device: 92.336, Tokens/s/device: 13917.960, total_weights: 65536, loss: 5.719, lm_loss: 5.719, perplexity: 304.661
I0423 22:35:44.444528 137883717449472 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_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_16_zarr3_true/checkpoints/15/items/array_metadatas/process_6
I0423 22:36:00.644766 138008444487488 metric_logger.py:196] completed step: 16, seconds: 52.850, TFLOP/s/device: 0.257, Tokens/s/device: 38.751, total_weights: 65536, loss: 5.605, lm_loss: 5.605, perplexity: 271.872
I0423 22:36:00.792153 138008444487488 metric_logger.py:196] completed step: 17, seconds: 21.555, TFLOP/s/device: 0.630, Tokens/s/device: 95.013, total_weights: 65536, loss: 5.517, lm_loss: 5.517, perplexity: 248.975
I0423 22:36:00.939289 138008444487488 metric_logger.py:196] completed step: 18, seconds: 0.153, TFLOP/s/device: 88.872, Tokens/s/device: 13395.777, total_weights: 65536, loss: 5.448, lm_loss: 5.448, perplexity: 232.333
I0423 22:36:01.085939 138008444487488 checkpointing.py:772] Waiting for step 19 to finish before checkpoint...
I0423 22:36:01.086601 138008444487488 checkpointing.py:776] Waited 0.0006794929504394531 seconds for step 19 to finish before starting checkpointing.
I0423 22:36:01.088732 138008444487488 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=15][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0423 22:36:19.968843 137883208038144 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 38.456 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.075921297073364 s) (per-host)
I0423 22:36:19.968973 137883208038144 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.044224s.
I0423 22:36:30.528463 137883208038144 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 51.603699s.
I0423 22:36:30.528740 137883199645440 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0423 22:36:30.528857 137883199645440 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0423 22:36:30.528907 137883199645440 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=15] CheckpointManager Save Finalize is syncing with other hosts...
I0423 22:36:30.530461 137883199645440 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=15] CheckpointManager Save Finalize is done on all hosts.
I0423 22:36:30.530650 138008444487488 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.
W0423 22:36:30.530778 138008444487488 checkpoint_manager.py:1452] Waiting for previous save to complete took 29.442050 seconds. If this number is high, consider checkpointing less frequently.
I0423 22:36:30.532320 138008444487488 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 19
I0423 22:36:30.534315 138008444487488 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_16_zarr3_true/checkpoints/19.
I0423 22:36:31.117277 138008444487488 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0423 22:36:31.117371 138008444487488 replica_slices.py:424] Transferring arrays to host memory with options: use_replica_parallel=True, min_slice_bytes_for_replica_parallel=None, max_replicas_for_replica_parallel=None, enable_pinned_host_transfer=False
I0423 22:36:31.142519 138008444487488 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.026126s
I0423 22:36:31.142655 138008444487488 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 52.155 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.029576778411865234 s) (per-host)
I0423 22:36:31.142700 138008444487488 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.029633s (batch_requests_ready=0.001636s, total_serialization_initiated=0.027936s, others=0.000061s)
I0423 22:36:31.142768 138008444487488 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.033723s (all_items=0.000011s, per_item={'items': '0.00001073'}, temp_paths=0.033713)
I0423 22:36:31.143474 138008444487488 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.61 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_16_zarr3_true/checkpoints/19.
I0423 22:36:31.143795 137883199645440 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-23 22:56:31.143758
I0423 22:36:31.148574 138008444487488 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize
I0423 22:36:31.148837 137882123622144 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0423 22:36:31.148995 138008444487488 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_16_zarr3_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776983761.0887022, 'wait_for_prev_duration_secs': 29.442050218582153, 'time_between_consecutive_saves_sec': 22.89103078842163, 'checkpointer_blocking_start_time': 1776983790.5323598, 'checkpointer_blocking_duration_secs': 0.6115779876708984, 'get_old_steps_start_time': 1776983791.1439555, 'get_old_steps_duration_secs': 2.7179718017578125e-05, 'checkpoint_manager_blocking_start_time': 1776983761.0868576, 'checkpoint_manager_blocking_duration_secs': 30.062103986740112}
I0423 22:36:31.149142 138008444487488 checkpointing.py:408] Started an asynchronous checkpoint save for step 19
I0423 22:36:31.149188 138008444487488 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0423 22:36:36.223418 137883717449472 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_20260423_211617/linen_xpk_test_pipeline_scan_nnx_20260423_211617_16_zarr3_true/checkpoints/19/items/array_metadatas/process_6
I0423 22:37:11.575804 137883199645440 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 39.038 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 40.46268606185913 s) (per-host)
I0423 22:37:11.575929 137883199645440 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 40.432025s.
I0423 22:37:21.112851 137883199645440 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 49.968932s.
I0423 22:37:21.113144 137882123622144 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0423 22:37:21.113261 137882123622144 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0423 22:37:21.113305 137882123622144 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts...
I0423 22:37:21.115034 137882123622144 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts.
I0423 22:37:21.115211 138008444487488 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.
I0423 22:37:21.115369 138008444487488 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0423 22:37:21.116367 138008444487488 metric_logger.py:196] completed step: 19, seconds: 0.147, TFLOP/s/device: 92.532, Tokens/s/device: 13947.438, 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: Thu Apr 23 22:37:32 UTC 2026
EXIT_CODE=0