MaxView

XPK Start: Wed Apr 22 22:47:56 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. 
2026-04-22 22:48:21.866896: 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)
I0422 22:48:22.079049 136183349827392 max_utils.py:273] Attempting to initialize the jax distributed system...
I0422 22:48:31.120312 136183349827392 distributed.py:149] Starting JAX distributed service on [::]:8482
I0422 22:48:31.122664 136183349827392 distributed.py:172] Connecting to JAX distributed service on mt-16-zarr3-true-rs-wwfxh-slice-job-0-0.mt-16-zarr3-true-rs-wwfxh:8482
I0422 22:48:32.756399 136183349827392 max_utils.py:284] Jax distributed system initialized!
I0422 22:48:38.745217 136183349827392 max_utils.py:800] System Information: Jax Version: 0.9.2
I0422 22:48:38.745325 136183349827392 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0422 22:48:38.745367 136183349827392 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
I0422 22:48:38.745401 136183349827392 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0422 22:48:39.431568 136183349827392 maxtext_utils.py:1565] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0422 22:48:39.431857 136183349827392 checkpointing.py:677] Setting up checkpoint logger...
I0422 22:48:39.431912 136183349827392 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0422 22:48:39.431972 136183349827392 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0422 22:48:39.432306 136183349827392 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 0x7bdb11b1c1a0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0422 22:48:41.109003 136183349827392 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0422 22:48:41.109239 136183349827392 checkpoint_manager.py:708] [process=3][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7bc61c757920>}, handler_registry=None
I0422 22:48:41.109472 136183349827392 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7bc61c757920>` 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`.
I0422 22:48:41.109523 136183349827392 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7bc61c75dd30>` 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`.
I0422 22:48:41.109559 136183349827392 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 0x7bc61c757920>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7bc61c757920>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7bc61c75dd30>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7bc61c75dd30>}).
I0422 22:48:41.109879 136183349827392 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0422 22:48:41.109972 136183349827392 async_checkpointer.py:192] [process=3][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7bc5fc3432e0> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0422 22:48:43.054471 136062584207104 checkpoint.py:228] Read Metadata={'item_handlers': {'items': 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler'}, 'metrics': {}, 'performance_metrics': {}, 'init_timestamp_nsecs': 1776897857966287684, 'commit_timestamp_nsecs': 1776897901287762356, 'custom_metadata': {}} from gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_true/checkpoints/0/_CHECKPOINT_METADATA
I0422 22:48:43.298730 136062584207104 checkpoint_manager.py:1871] Missing metrics for step 0
I0422 22:48:43.598793 136183349827392 checkpoint_manager.py:1812] Found 3 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_true/checkpoints
I0422 22:48:44.990050 136183349827392 checkpoint_manager.py:929] [process=3][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_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_true/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7bc6e431e780>
I0422 22:48:44.990225 136183349827392 checkpointing.py:301] Checkpoint manager created!
I0422 22:48:45.932720 136183349827392 nnx_wrappers.py:453] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0422 22:48:45.932837 136183349827392 nnx_wrappers.py:453] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0422 22:48:46.314892 136183349827392 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0422 22:48:46.314999 136183349827392 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0422 22:48:46.331468 136183349827392 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0422 22:48:46.331537 136183349827392 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0422 22:48:46.355066 136183349827392 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0422 22:48:46.355134 136183349827392 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0422 22:48:46.371620 136183349827392 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0422 22:48:46.371685 136183349827392 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0422 22:48:46.388116 136183349827392 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0422 22:48:46.388176 136183349827392 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0422 22:48:46.413042 136183349827392 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0422 22:48:46.413112 136183349827392 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0422 22:48:46.434147 136183349827392 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0422 22:48:46.434219 136183349827392 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0422 22:48:46.646597 136183349827392 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0422 22:48:46.646726 136183349827392 checkpointing.py:581] restoring from this run's directory step 9
I0422 22:48:47.327228 136183349827392 event_tracking.py:70] [process=3] [sync] Started load checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_true/checkpoints/9.
I0422 22:48:47.581183 136183349827392 checkpointer.py:307] Restoring checkpoint from gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_true/checkpoints/9.
I0422 22:48:47.581609 136183349827392 event_tracking.py:125] [process=3] [sync] Finished blocking load in 0.25 seconds. Continuing load @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_true/checkpoints/9.
I0422 22:48:49.428964    1442 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0422 22:48:55.952477 136183349827392 jax_array_handlers.py:843] [process=3] /jax/orbax/read/worker/io/requested throughput: 242.021 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 6.5294976234436035 s) (per-host)
I0422 22:48:55.958208 136183349827392 base_pytree_checkpoint_handler.py:130] [process=3] /jax/checkpoint/read/gbytes_per_sec: 228.356 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 6.930376768112183 s) (per-host)
I0422 22:48:56.334690 136183349827392 event_tracking.py:138] [process=3] [sync] Finished load in 9.01 seconds @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_true/checkpoints/9
I0422 22:48:56.334848 136183349827392 standard_logger.py:34] {'step': 9, 'event_type': 'restore', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_true/checkpoints', 'checkpointer_start_time': 1776898127.327129, 'checkpointer_duration_secs': 9.007685899734497, 'checkpoint_manager_start_time': 1776898126.6470096, 'checkpoint_manager_duration_secs': 9.687807083129883}
fsdp: 32
I0422 22:48:56.760187 136183349827392 maxtext_utils.py:1668]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0422 22:48:56.760349 136183349827392 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)
I0422 22:48:56.760427 136183349827392 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)
I0422 22:48:56.760517 136183349827392 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')
I0422 22:48:56.760605 136183349827392 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)
I0422 22:48:56.760667 136183349827392 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)
I0422 22:48:56.760762 136183349827392 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)
I0422 22:48:56.760845 136183349827392 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')
I0422 22:48:56.760905 136183349827392 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)
I0422 22:48:56.760981 136183349827392 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)
I0422 22:48:56.761055 136183349827392 maxtext_utils.py:1668]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)
I0422 22:48:56.761131 136183349827392 maxtext_utils.py:1668]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')

I0422 22:48:57.245231 136183349827392 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0422 22:48:57.245328 136183349827392 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0422 22:48:57.260860 136183349827392 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0422 22:48:57.260921 136183349827392 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0422 22:49:08.328727 136183349827392 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.
I0422 22:49:08.329574 136183349827392 metric_logger.py:301] number parameters: 1.104 billion
I0422 22:49:19.699634 136183349827392 checkpointing.py:772] Waiting for step 10 to finish before checkpoint...
I0422 22:49:19.864790 136183349827392 checkpointing.py:776] Waited 0.16512703895568848 seconds for step 10 to finish before starting checkpointing.
I0422 22:49:19.867234 136183349827392 checkpoint_manager.py:2009] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0422 22:49:19.869168 136183349827392 checkpoint_manager.py:1512] [process=3] Saving checkpoint at step 10
I0422 22:49:19.870696 136183349827392 event_tracking.py:70] [process=3] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_true/checkpoints/10.
I0422 22:49:20.614897 136183349827392 signaling_client.py:364] Using JaxDistributedSignalingClient
I0422 22:49:20.615842 136183349827392 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0422 22:49:20.615900 136183349827392 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
I0422 22:49:20.896457 136183349827392 base_pytree_checkpoint_handler.py:154] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.281636s
I0422 22:49:20.896637 136183349827392 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/blocking_gbytes_per_sec: 5.403 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2854917049407959 s) (per-host)
I0422 22:49:20.896694 136183349827392 base_pytree_checkpoint_handler.py:768] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.285558s (batch_requests_ready=0.002142s, total_serialization_initiated=0.283341s, others=0.000075s)
I0422 22:49:20.896784 136183349827392 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.289669s (all_items=0.000018s, per_item={'items': '0.00001764'}, temp_paths=0.289651)
I0422 22:49:20.897526 136183349827392 event_tracking.py:125] [process=3] [async] Finished blocking save in 1.03 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_true/checkpoints/10.
I0422 22:49:20.897892 136061997012736 async_checkpointer.py:76] [process=3][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-22 23:09:20.897853
I0422 22:49:20.908955 136183349827392 checkpoint_manager.py:1560] [process=3][thread=MainThread][step=10] Starting CheckpointManager Save Finalize thread=save_finalize
I0422 22:49:20.909213 136058744456960 async_checkpointer.py:280] [process=3][thread=save_finalize] Waiting for background save thread=async_save.
I0422 22:49:20.909367 136183349827392 standard_logger.py:34] {'step': 10, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776898159.8672156, 'wait_for_prev_duration_secs': 6.031990051269531e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776898159.8692048, 'checkpointer_blocking_duration_secs': 1.0288581848144531, 'get_old_steps_start_time': 1776898160.8980875, 'get_old_steps_duration_secs': 3.266334533691406e-05, 'checkpoint_manager_blocking_start_time': 1776898159.865318, 'checkpoint_manager_blocking_duration_secs': 1.0440123081207275}
I0422 22:49:20.909486 136183349827392 checkpointing.py:408] Started an asynchronous checkpoint save for step 10
I0422 22:49:20.909535 136183349827392 max_utils.py:750] 
Memstats: After params initialized:
I0422 22:49:20.909583 136183349827392 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_10(process=3,(2,2,0,0))
I0422 22:49:20.909615 136183349827392 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_11(process=3,(3,2,0,0))
I0422 22:49:20.909642 136183349827392 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_14(process=3,(2,3,0,0))
I0422 22:49:20.909666 136183349827392 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_15(process=3,(3,3,0,0))
I0422 22:49:21.230093 136183349827392 metric_logger.py:196] completed step: 10, seconds: 11.370, TFLOP/s/device: 1.195, Tokens/s/device: 180.124, total_weights: 65536, loss: 6.833, lm_loss: 6.833, perplexity: 927.869
I0422 22:49:21.801509 136183349827392 metric_logger.py:196] completed step: 11, seconds: 1.529, TFLOP/s/device: 8.887, Tokens/s/device: 1339.523, total_weights: 65536, loss: 6.527, lm_loss: 6.527, perplexity: 683.659
I0422 22:49:21.949143 136183349827392 metric_logger.py:196] completed step: 12, seconds: 0.426, TFLOP/s/device: 31.923, Tokens/s/device: 4811.827, total_weights: 65536, loss: 6.265, lm_loss: 6.265, perplexity: 526.068
I0422 22:49:22.096422 136183349827392 metric_logger.py:196] completed step: 13, seconds: 0.152, TFLOP/s/device: 89.491, Tokens/s/device: 13489.037, total_weights: 65536, loss: 6.045, lm_loss: 6.045, perplexity: 422.001
I0422 22:49:22.100705 136183349827392 checkpointing.py:772] Waiting for step 15 to finish before checkpoint...
I0422 22:49:22.390467 136183349827392 checkpointing.py:776] Waited 0.2897157669067383 seconds for step 15 to finish before starting checkpointing.
I0422 22:49:22.393562 136183349827392 checkpoint_manager.py:2020] [process=3][thread=MainThread][step=10][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0422 22:49:26.618825 136058752849664 array_metadata_store.py:203] [process=3][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_true/checkpoints/10/items/array_metadatas/process_3
I0422 22:50:03.044291 136061997012736 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/gbytes_per_sec: 37.226 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.43310761451721 s) (per-host)
I0422 22:50:03.044420 136061997012736 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.146397s.
I0422 22:50:11.830980 136061997012736 async_checkpointer.py:160] [process=3][thread=async_save] Background save thread done. Time taken: 50.932938s.
I0422 22:50:11.831279 136058744456960 async_checkpointer.py:288] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save.
I0422 22:50:11.831398 136058744456960 async_checkpointer.py:298] [process=3][thread=save_finalize] No errors found in background save thread=async_save.
I0422 22:50:11.831449 136058744456960 checkpoint_manager.py:2137] [process=3][thread=save_finalize][step=10] CheckpointManager Save Finalize is syncing with other hosts...
I0422 22:50:11.833089 136058744456960 checkpoint_manager.py:2146] [process=3][thread=save_finalize][step=10] CheckpointManager Save Finalize is done on all hosts.
I0422 22:50:11.833262 136183349827392 checkpoint_manager.py:2032] [process=3][thread=MainThread][step=10][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=10.
W0422 22:50:11.833398 136183349827392 checkpoint_manager.py:1452] Waiting for previous save to complete took 49.439837 seconds. If this number is high, consider checkpointing less frequently.
I0422 22:50:11.835355 136183349827392 checkpoint_manager.py:1512] [process=3] Saving checkpoint at step 15
I0422 22:50:11.837904 136183349827392 event_tracking.py:70] [process=3] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_true/checkpoints/15.
I0422 22:50:12.224983 136183349827392 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0422 22:50:12.225074 136183349827392 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
I0422 22:50:12.265600 136183349827392 base_pytree_checkpoint_handler.py:154] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.041811s
I0422 22:50:12.265756 136183349827392 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/blocking_gbytes_per_sec: 34.117 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04521369934082031 s) (per-host)
I0422 22:50:12.265807 136183349827392 base_pytree_checkpoint_handler.py:768] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.045274s (batch_requests_ready=0.001774s, total_serialization_initiated=0.043434s, others=0.000065s)
I0422 22:50:12.265893 136183349827392 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.050371s (all_items=0.000014s, per_item={'items': '0.00001359'}, temp_paths=0.050357)
I0422 22:50:12.266615 136183349827392 event_tracking.py:125] [process=3] [async] Finished blocking save in 0.43 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_true/checkpoints/15.
I0422 22:50:12.266911 136058744456960 async_checkpointer.py:76] [process=3][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-22 23:10:12.266886
I0422 22:50:12.268889 136183349827392 checkpoint_manager.py:1560] [process=3][thread=MainThread][step=15] Starting CheckpointManager Save Finalize thread=save_finalize
I0422 22:50:12.269191 136058752849664 async_checkpointer.py:280] [process=3][thread=save_finalize] Waiting for background save thread=async_save.
I0422 22:50:12.269351 136183349827392 standard_logger.py:34] {'step': 15, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776898162.3935328, 'wait_for_prev_duration_secs': 49.43983697891235, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776898211.8353934, 'checkpointer_blocking_duration_secs': 0.4316372871398926, 'get_old_steps_start_time': 1776898212.2670543, 'get_old_steps_duration_secs': 2.9802322387695312e-05, 'checkpoint_manager_blocking_start_time': 1776898162.3910944, 'checkpoint_manager_blocking_duration_secs': 49.878222703933716}
I0422 22:50:12.269461 136183349827392 checkpointing.py:408] Started an asynchronous checkpoint save for step 15
I0422 22:50:12.270240 136183349827392 metric_logger.py:196] completed step: 14, seconds: 0.147, TFLOP/s/device: 92.135, Tokens/s/device: 13887.570, total_weights: 65536, loss: 5.864, lm_loss: 5.864, perplexity: 352.193
I0422 22:50:12.276252 136183349827392 metric_logger.py:196] completed step: 15, seconds: 0.147, TFLOP/s/device: 92.333, Tokens/s/device: 13917.487, total_weights: 65536, loss: 5.719, lm_loss: 5.719, perplexity: 304.661
I0422 22:50:17.353567 136056603125504 array_metadata_store.py:203] [process=3][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_true/checkpoints/15/items/array_metadatas/process_3
I0422 22:50:33.615983 136183349827392 metric_logger.py:196] completed step: 16, seconds: 50.174, TFLOP/s/device: 0.271, Tokens/s/device: 40.818, total_weights: 65536, loss: 5.605, lm_loss: 5.605, perplexity: 271.872
I0422 22:50:33.763258 136183349827392 metric_logger.py:196] completed step: 17, seconds: 21.194, TFLOP/s/device: 0.641, Tokens/s/device: 96.633, total_weights: 65536, loss: 5.517, lm_loss: 5.517, perplexity: 248.975
I0422 22:50:33.910873 136183349827392 metric_logger.py:196] completed step: 18, seconds: 0.152, TFLOP/s/device: 89.230, Tokens/s/device: 13449.705, total_weights: 65536, loss: 5.448, lm_loss: 5.448, perplexity: 232.333
I0422 22:50:34.057387 136183349827392 checkpointing.py:772] Waiting for step 19 to finish before checkpoint...
I0422 22:50:34.058099 136183349827392 checkpointing.py:776] Waited 0.0007350444793701172 seconds for step 19 to finish before starting checkpointing.
I0422 22:50:34.060219 136183349827392 checkpoint_manager.py:2020] [process=3][thread=MainThread][step=15][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0422 22:50:54.388884 136058744456960 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/gbytes_per_sec: 37.459 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.16830396652222 s) (per-host)
I0422 22:50:54.389030 136058744456960 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.122023s.
I0422 22:51:01.277794 136058744456960 async_checkpointer.py:160] [process=3][thread=async_save] Background save thread done. Time taken: 49.010771s.
I0422 22:51:01.278162 136058752849664 async_checkpointer.py:288] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save.
I0422 22:51:01.278298 136058752849664 async_checkpointer.py:298] [process=3][thread=save_finalize] No errors found in background save thread=async_save.
I0422 22:51:01.278350 136058752849664 checkpoint_manager.py:2137] [process=3][thread=save_finalize][step=15] CheckpointManager Save Finalize is syncing with other hosts...
I0422 22:51:01.282353 136058752849664 checkpoint_manager.py:2146] [process=3][thread=save_finalize][step=15] CheckpointManager Save Finalize is done on all hosts.
I0422 22:51:01.282539 136183349827392 checkpoint_manager.py:2032] [process=3][thread=MainThread][step=15][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=15.
W0422 22:51:01.282666 136183349827392 checkpoint_manager.py:1452] Waiting for previous save to complete took 27.222455 seconds. If this number is high, consider checkpointing less frequently.
I0422 22:51:01.284891 136183349827392 checkpoint_manager.py:1512] [process=3] Saving checkpoint at step 19
I0422 22:51:01.286908 136183349827392 event_tracking.py:70] [process=3] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_true/checkpoints/19.
I0422 22:51:01.986338 136183349827392 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0422 22:51:01.986455 136183349827392 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
I0422 22:51:02.026690 136183349827392 base_pytree_checkpoint_handler.py:154] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.041353s
I0422 22:51:02.026853 136183349827392 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/blocking_gbytes_per_sec: 34.430 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04480385780334473 s) (per-host)
I0422 22:51:02.026900 136183349827392 base_pytree_checkpoint_handler.py:768] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.044862s (batch_requests_ready=0.001629s, total_serialization_initiated=0.043170s, others=0.000063s)
I0422 22:51:02.027000 136183349827392 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.049218s (all_items=0.000011s, per_item={'items': '0.00001073'}, temp_paths=0.049207)
I0422 22:51:02.027739 136183349827392 event_tracking.py:125] [process=3] [async] Finished blocking save in 0.74 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_true/checkpoints/19.
I0422 22:51:02.028064 136058752849664 async_checkpointer.py:76] [process=3][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-22 23:11:02.028026
I0422 22:51:02.030028 136183349827392 checkpoint_manager.py:1560] [process=3][thread=MainThread][step=19] Starting CheckpointManager Save Finalize thread=save_finalize
I0422 22:51:02.030289 136061997012736 async_checkpointer.py:280] [process=3][thread=save_finalize] Waiting for background save thread=async_save.
I0422 22:51:02.030443 136183349827392 standard_logger.py:34] {'step': 19, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776898234.0601876, 'wait_for_prev_duration_secs': 27.22245478630066, 'time_between_consecutive_saves_sec': 22.227060317993164, 'checkpointer_blocking_start_time': 1776898261.2849824, 'checkpointer_blocking_duration_secs': 0.7432248592376709, 'get_old_steps_start_time': 1776898262.0282254, 'get_old_steps_duration_secs': 2.5033950805664062e-05, 'checkpoint_manager_blocking_start_time': 1776898234.0583284, 'checkpoint_manager_blocking_duration_secs': 27.97208309173584}
I0422 22:51:02.030556 136183349827392 checkpointing.py:408] Started an asynchronous checkpoint save for step 19
I0422 22:51:02.030599 136183349827392 checkpoint_manager.py:2020] [process=3][thread=MainThread][step=19][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0422 22:51:07.578637 136055017690880 array_metadata_store.py:203] [process=3][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_test_pipeline_scan_nnx_20260422_212603/linen_xpk_test_pipeline_scan_nnx_20260422_212603_16_zarr3_true/checkpoints/19/items/array_metadatas/process_3
I0422 22:51:44.872801 136058752849664 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/gbytes_per_sec: 36.828 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.89071202278137 s) (per-host)
I0422 22:51:44.872942 136058752849664 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.844751s.
I0422 22:52:03.944739 136058752849664 async_checkpointer.py:160] [process=3][thread=async_save] Background save thread done. Time taken: 61.916548s.
I0422 22:52:03.945012 136061997012736 async_checkpointer.py:288] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save.
I0422 22:52:03.945131 136061997012736 async_checkpointer.py:298] [process=3][thread=save_finalize] No errors found in background save thread=async_save.
I0422 22:52:03.945174 136061997012736 checkpoint_manager.py:2137] [process=3][thread=save_finalize][step=19] CheckpointManager Save Finalize is syncing with other hosts...
I0422 22:52:03.946818 136061997012736 checkpoint_manager.py:2146] [process=3][thread=save_finalize][step=19] CheckpointManager Save Finalize is done on all hosts.
I0422 22:52:03.947043 136183349827392 checkpoint_manager.py:2032] [process=3][thread=MainThread][step=19][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=19.
I0422 22:52:03.947217 136183349827392 checkpoint_manager.py:2009] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0422 22:52:03.948301 136183349827392 metric_logger.py:196] completed step: 19, seconds: 0.147, TFLOP/s/device: 92.295, Tokens/s/device: 13911.720, 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: Wed Apr 22 22:52:17 UTC 2026
EXIT_CODE=0