MaxView

XPK Start: Sat Apr 18 06:10:05 UTC 2026
PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used.
2026-04-18 06:10:29.672043: 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)
I0418 06:10:29.852503 134008598599488 max_utils.py:273] Attempting to initialize the jax distributed system...
I0418 06:10:38.894081 134008598599488 distributed.py:149] Starting JAX distributed service on [::]:8482
I0418 06:10:38.896386 134008598599488 distributed.py:172] Connecting to JAX distributed service on mt-02-synthetic-vb5jr-slice-job-0-0.mt-02-synthetic-vb5jr:8482
I0418 06:10:40.908177 134008598599488 max_utils.py:284] Jax distributed system initialized!
I0418 06:10:46.936250 134008598599488 max_utils.py:800] System Information: Jax Version: 0.9.2
I0418 06:10:46.936354 134008598599488 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0418 06:10:46.936395 134008598599488 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
I0418 06:10:46.936430 134008598599488 train_utils.py:378] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0418 06:10:48.008181 134008598599488 maxtext_utils.py:1718] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0418 06:10:48.008781 134008598599488 maxtext_utils.py:1718] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0418 06:10:48.008957 134008598599488 checkpointing.py:688] Setting up checkpoint logger...
I0418 06:10:48.009005 134008598599488 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True
I0418 06:10:48.009047 134008598599488 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0418 06:10:48.009405 134008598599488 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 0x79e097350d10>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0418 06:10:52.279821 134008598599488 checkpointing.py:266] Enabling policy for fixed interval checkpointing.
I0418 06:10:52.280009 134008598599488 checkpoint_manager.py:708] [process=2][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x79df8b4c27e0>}, handler_registry=None
I0418 06:10:52.280262 134008598599488 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x79df8b4c27e0>` 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`.
I0418 06:10:52.280311 134008598599488 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x79df8b5385c0>` 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`.
I0418 06:10:52.280346 134008598599488 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 0x79df8b4c27e0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x79df8b4c27e0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x79df8b5385c0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x79df8b5385c0>}).
I0418 06:10:52.280667 134008598599488 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0418 06:10:52.280734 134008598599488 async_checkpointer.py:192] [process=2][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x79df8b648360> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0418 06:10:53.330866 134008598599488 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141/linen_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141_02_synthetic/checkpoints
I0418 06:10:54.209665 134008598599488 checkpoint_manager.py:929] [process=2][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=10), 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_feat_nnx_trainstate_and_training_loop_20260418_060141/linen_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141_02_synthetic/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x79cc880f5100>
I0418 06:10:54.209839 134008598599488 checkpointing.py:302] Checkpoint manager created!
I0418 06:10:55.143819 134008598599488 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0418 06:10:55.143924 134008598599488 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0418 06:10:55.524585 134008598599488 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0418 06:10:55.524675 134008598599488 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0418 06:10:55.540878 134008598599488 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0418 06:10:55.540938 134008598599488 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0418 06:10:55.564335 134008598599488 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0418 06:10:55.564400 134008598599488 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0418 06:10:55.580656 134008598599488 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0418 06:10:55.580717 134008598599488 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0418 06:10:55.596824 134008598599488 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0418 06:10:55.596883 134008598599488 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0418 06:10:55.621178 134008598599488 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0418 06:10:55.621254 134008598599488 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0418 06:10:55.641971 134008598599488 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0418 06:10:55.642036 134008598599488 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0418 06:10:55.855521 134008598599488 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint
I0418 06:10:55.855629 134008598599488 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0418 06:10:57.299191 134008598599488 maxtext_utils.py:1821]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0418 06:10:57.299340 134008598599488 maxtext_utils.py:1821]  params/params/decoder/layers/mlp/wi_0/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0418 06:10:57.299395 134008598599488 maxtext_utils.py:1821]  params/params/decoder/layers/mlp/wi_1/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0418 06:10:57.299454 134008598599488 maxtext_utils.py:1821]  params/params/decoder/layers/mlp/wo/kernel
    Shape:     float32[7168,16,2048]
    Logical:   P('mlp', 'layers', 'embed')
    Physical:  (None, None, 'fsdp')
I0418 06:10:57.299513 134008598599488 maxtext_utils.py:1821]  params/params/decoder/layers/post_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0418 06:10:57.299554 134008598599488 maxtext_utils.py:1821]  params/params/decoder/layers/pre_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0418 06:10:57.299607 134008598599488 maxtext_utils.py:1821]  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)
I0418 06:10:57.299669 134008598599488 maxtext_utils.py:1821]  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')
I0418 06:10:57.299709 134008598599488 maxtext_utils.py:1821]  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)
I0418 06:10:57.299746 134008598599488 maxtext_utils.py:1821]  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)
I0418 06:10:57.299795 134008598599488 maxtext_utils.py:1821]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)
I0418 06:10:57.299843 134008598599488 maxtext_utils.py:1821]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')

I0418 06:10:57.797126 134008598599488 train.py:157] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0418 06:10:57.797240 134008598599488 train.py:157] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0418 06:10:57.812573 134008598599488 train.py:164] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0418 06:10:57.812636 134008598599488 train.py:164] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0418 06:11:08.793683 134008598599488 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.
I0418 06:11:08.794445 134008598599488 metric_logger.py:301] number parameters: 1.104 billion
I0418 06:11:20.031253 134008598599488 checkpointing.py:794] Waiting for step 0 to finish before checkpoint...
I0418 06:11:20.185589 134008598599488 checkpointing.py:798] Waited 0.15430998802185059 seconds for step 0 to finish before starting checkpointing.
I0418 06:11:20.187880 134008598599488 checkpoint_manager.py:2009] [process=2][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0418 06:11:20.189589 134008598599488 checkpoint_manager.py:1512] [process=2] Saving checkpoint at step 0
I0418 06:11:20.191043 134008598599488 event_tracking.py:70] [process=2] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141/linen_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141_02_synthetic/checkpoints/0.
I0418 06:11:20.956854 134008598599488 signaling_client.py:364] Using JaxDistributedSignalingClient
I0418 06:11:20.957833 134008598599488 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0418 06:11:20.957888 134008598599488 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
I0418 06:11:21.242630 134008598599488 base_pytree_checkpoint_handler.py:154] [process=2][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.285846s
I0418 06:11:21.242800 134008598599488 base_pytree_checkpoint_handler.py:130] [process=2] /jax/orbax/write/blocking_gbytes_per_sec: 5.289 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.29167723655700684 s) (per-host)
I0418 06:11:21.242853 134008598599488 base_pytree_checkpoint_handler.py:768] [process=2][thread=MainThread] Initiated Pytree async_save. Time taken: 0.291742s (batch_requests_ready=0.002627s, total_serialization_initiated=0.289043s, others=0.000071s)
I0418 06:11:21.242939 134008598599488 composite_checkpoint_handler.py:715] [process=2][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.295552s (all_items=0.000018s, per_item={'items': '0.00001812'}, temp_paths=0.295534)
I0418 06:11:21.243793 134008598599488 event_tracking.py:125] [process=2] [async] Finished blocking save in 1.05 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141/linen_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141_02_synthetic/checkpoints/0.
I0418 06:11:21.244138 133880451770112 async_checkpointer.py:76] [process=2][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-18 06:31:21.244101
I0418 06:11:21.246126 134008598599488 checkpoint_manager.py:1560] [process=2][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0418 06:11:21.246465 133878322996992 async_checkpointer.py:280] [process=2][thread=save_finalize] Waiting for background save thread=async_save.
I0418 06:11:21.246601 134008598599488 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141/linen_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141_02_synthetic/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776492680.1878622, 'wait_for_prev_duration_secs': 5.984306335449219e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776492680.189627, 'checkpointer_blocking_duration_secs': 1.0546317100524902, 'get_old_steps_start_time': 1776492681.244285, 'get_old_steps_duration_secs': 2.8848648071289062e-05, 'checkpoint_manager_blocking_start_time': 1776492680.1859763, 'checkpoint_manager_blocking_duration_secs': 1.0605874061584473}
I0418 06:11:21.246762 134008598599488 checkpointing.py:409] Started an asynchronous checkpoint save for step 0
I0418 06:11:21.246814 134008598599488 max_utils.py:750] 
Memstats: After params initialized:
I0418 06:11:21.246863 134008598599488 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_8(process=2,(0,2,0,0))
I0418 06:11:21.246895 134008598599488 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_9(process=2,(1,2,0,0))
I0418 06:11:21.246922 134008598599488 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_12(process=2,(0,3,0,0))
I0418 06:11:21.246945 134008598599488 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_13(process=2,(1,3,0,0))
I0418 06:11:21.560156 134008598599488 metric_logger.py:196] completed step: 0, seconds: 11.237, TFLOP/s/device: 1.209, Tokens/s/device: 182.260, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0418 06:11:21.734909 134008598599488 metric_logger.py:196] completed step: 1, seconds: 1.527, TFLOP/s/device: 8.897, Tokens/s/device: 1341.089, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0418 06:11:22.155299 134008598599488 metric_logger.py:196] completed step: 2, seconds: 0.028, TFLOP/s/device: 489.115, Tokens/s/device: 73724.756, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28637.129
I0418 06:11:22.302526 134008598599488 metric_logger.py:196] completed step: 3, seconds: 0.421, TFLOP/s/device: 32.293, Tokens/s/device: 4867.603, total_weights: 65536, loss: 9.734, lm_loss: 9.734, perplexity: 16889.203
I0418 06:11:22.597944 134008598599488 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.785, Tokens/s/device: 13382.647, total_weights: 65536, loss: 9.277, lm_loss: 9.277, perplexity: 10694.614
I0418 06:11:22.603867 134008598599488 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.421, Tokens/s/device: 13930.646, total_weights: 65536, loss: 8.892, lm_loss: 8.892, perplexity: 7270.717
I0418 06:11:26.227402    2806 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0418 06:11:30.048967 133878865979136 array_metadata_store.py:203] [process=2][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141/linen_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141_02_synthetic/checkpoints/0/items/array_metadatas/process_2
I0418 06:11:45.068910 134008598599488 metric_logger.py:196] completed step: 6, seconds: 0.296, TFLOP/s/device: 45.915, Tokens/s/device: 6920.836, total_weights: 65536, loss: 8.592, lm_loss: 8.592, perplexity: 5390.759
I0418 06:11:45.216323 134008598599488 metric_logger.py:196] completed step: 7, seconds: 22.318, TFLOP/s/device: 0.609, Tokens/s/device: 91.763, total_weights: 65536, loss: 8.384, lm_loss: 8.384, perplexity: 4376.905
I0418 06:11:45.363694 134008598599488 metric_logger.py:196] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.220, Tokens/s/device: 13448.203, total_weights: 65536, loss: 8.255, lm_loss: 8.255, perplexity: 3846.406
I0418 06:11:45.510374 134008598599488 checkpointing.py:794] Waiting for step 9 to finish before checkpoint...
I0418 06:11:45.510970 134008598599488 checkpointing.py:798] Waited 0.0006196498870849609 seconds for step 9 to finish before starting checkpointing.
I0418 06:11:45.513170 134008598599488 checkpoint_manager.py:2020] [process=2][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0418 06:11:59.551069 133880451770112 base_pytree_checkpoint_handler.py:130] [process=2] /jax/orbax/write/gbytes_per_sec: 40.922 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 38.59992599487305 s) (per-host)
I0418 06:11:59.551178 133880451770112 async_checkpointer.py:90] [process=2][thread=async_save] 3 Handler Commit operations completed. Time taken: 38.306404s.
I0418 06:12:11.185171 133880451770112 async_checkpointer.py:160] [process=2][thread=async_save] Background save thread done. Time taken: 49.940380s.
I0418 06:12:11.185526 133878322996992 async_checkpointer.py:288] [process=2][thread=save_finalize] Done with waiting for background save thread=async_save.
I0418 06:12:11.185682 133878322996992 async_checkpointer.py:298] [process=2][thread=save_finalize] No errors found in background save thread=async_save.
I0418 06:12:11.185741 133878322996992 checkpoint_manager.py:2137] [process=2][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0418 06:12:11.187468 133878322996992 checkpoint_manager.py:2146] [process=2][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0418 06:12:11.187636 134008598599488 checkpoint_manager.py:2032] [process=2][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0418 06:12:11.187774 134008598599488 checkpoint_manager.py:1452] Waiting for previous save to complete took 25.674600 seconds. If this number is high, consider checkpointing less frequently.
I0418 06:12:11.190639 134008598599488 checkpoint_manager.py:1512] [process=2] Saving checkpoint at step 9
I0418 06:12:11.192792 134008598599488 event_tracking.py:70] [process=2] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141/linen_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141_02_synthetic/checkpoints/9.
I0418 06:12:11.910575 134008598599488 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0418 06:12:11.910671 134008598599488 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
I0418 06:12:11.948357 134008598599488 base_pytree_checkpoint_handler.py:154] [process=2][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.038806s
I0418 06:12:11.948523 134008598599488 base_pytree_checkpoint_handler.py:130] [process=2] /jax/orbax/write/blocking_gbytes_per_sec: 36.380 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.042402029037475586 s) (per-host)
I0418 06:12:11.948574 134008598599488 base_pytree_checkpoint_handler.py:768] [process=2][thread=MainThread] Initiated Pytree async_save. Time taken: 0.042462s (batch_requests_ready=0.001911s, total_serialization_initiated=0.040484s, others=0.000067s)
I0418 06:12:11.948662 134008598599488 composite_checkpoint_handler.py:715] [process=2][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.046523s (all_items=0.000015s, per_item={'items': '0.00001454'}, temp_paths=0.046508)
I0418 06:12:11.950095 134008598599488 event_tracking.py:125] [process=2] [async] Finished blocking save in 0.76 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141/linen_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141_02_synthetic/checkpoints/9.
I0418 06:12:11.950444 133878322996992 async_checkpointer.py:76] [process=2][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-18 06:32:11.950407
I0418 06:12:11.952486 134008598599488 checkpoint_manager.py:1560] [process=2][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0418 06:12:11.952733 133878865979136 async_checkpointer.py:280] [process=2][thread=save_finalize] Waiting for background save thread=async_save.
I0418 06:12:11.952836 134008598599488 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141/linen_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141_02_synthetic/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776492705.5131397, 'wait_for_prev_duration_secs': 25.67460036277771, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776492731.1906784, 'checkpointer_blocking_duration_secs': 0.7599115371704102, 'get_old_steps_start_time': 1776492731.950614, 'get_old_steps_duration_secs': 2.9087066650390625e-05, 'checkpoint_manager_blocking_start_time': 1776492705.5112207, 'checkpoint_manager_blocking_duration_secs': 26.441579341888428}
I0418 06:12:11.952988 134008598599488 checkpointing.py:409] Started an asynchronous checkpoint save for step 9
I0418 06:12:11.953035 134008598599488 checkpoint_manager.py:2020] [process=2][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0418 06:12:19.096733 133857680549632 array_metadata_store.py:203] [process=2][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141/linen_xpk_feat_nnx_trainstate_and_training_loop_20260418_060141_02_synthetic/checkpoints/9/items/array_metadatas/process_2
I0418 06:12:54.666024 133878322996992 base_pytree_checkpoint_handler.py:130] [process=2] /jax/orbax/write/gbytes_per_sec: 36.941 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.75986170768738 s) (per-host)
I0418 06:12:54.666150 133878322996992 async_checkpointer.py:90] [process=2][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.715589s.
I0418 06:13:05.274932 133878322996992 async_checkpointer.py:160] [process=2][thread=async_save] Background save thread done. Time taken: 53.324356s.
I0418 06:13:05.275248 133878865979136 async_checkpointer.py:288] [process=2][thread=save_finalize] Done with waiting for background save thread=async_save.
I0418 06:13:05.275386 133878865979136 async_checkpointer.py:298] [process=2][thread=save_finalize] No errors found in background save thread=async_save.
I0418 06:13:05.275437 133878865979136 checkpoint_manager.py:2137] [process=2][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0418 06:13:05.277073 133878865979136 checkpoint_manager.py:2146] [process=2][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0418 06:13:05.277261 134008598599488 checkpoint_manager.py:2032] [process=2][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0418 06:13:05.277422 134008598599488 checkpoint_manager.py:2009] [process=2][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0418 06:13:05.278346 134008598599488 metric_logger.py:196] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.283, Tokens/s/device: 13909.925, total_weights: 65536, loss: 8.179, lm_loss: 8.179, perplexity: 3564.635
Per train step:
 Total TFLOPs: 13.59 
 split as 93.93% learnable weight flops and 6.07% attention flops
XPK End: Sat Apr 18 06:13:15 UTC 2026
EXIT_CODE=0