MaxView

XPK Start: Sun Apr 19 21:51:14 UTC 2026
PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used.
2026-04-19 21:51:38.598901: 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)
I0419 21:51:38.777647 137961619969856 max_utils.py:273] Attempting to initialize the jax distributed system...
I0419 21:51:47.815766 137961619969856 distributed.py:149] Starting JAX distributed service on [::]:8482
I0419 21:51:47.818152 137961619969856 distributed.py:172] Connecting to JAX distributed service on mt-01-base-g0kok-slice-job-0-0.mt-01-base-g0kok:8482
I0419 21:51:51.791029 137961619969856 max_utils.py:284] Jax distributed system initialized!
I0419 21:51:57.787080 137961619969856 max_utils.py:800] System Information: Jax Version: 0.9.2
I0419 21:51:57.787180 137961619969856 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0419 21:51:57.787220 137961619969856 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
I0419 21:51:57.787254 137961619969856 train_utils.py:378] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0419 21:51:58.852532 137961619969856 maxtext_utils.py:1718] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0419 21:51:58.853115 137961619969856 maxtext_utils.py:1718] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0419 21:51:58.853294 137961619969856 checkpointing.py:688] Setting up checkpoint logger...
I0419 21:51:58.853355 137961619969856 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True
I0419 21:51:58.853401 137961619969856 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0419 21:51:58.853729 137961619969856 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 0x7d791cd1c0e0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0419 21:52:04.010976 137961619969856 checkpointing.py:266] Enabling policy for fixed interval checkpointing.
I0419 21:52:04.011210 137961619969856 checkpoint_manager.py:708] [process=4][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d77ed462510>}, handler_registry=None
I0419 21:52:04.011456 137961619969856 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d77ed462510>` 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`.
I0419 21:52:04.011505 137961619969856 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d77ed4b2e70>` 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`.
I0419 21:52:04.011540 137961619969856 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 0x7d77ed462510>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d77ed462510>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d77ed4b2e70>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d77ed4b2e70>}).
I0419 21:52:04.011858 137961619969856 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0419 21:52:04.011934 137961619969856 async_checkpointer.py:192] [process=4][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7d64e868f740> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0419 21:52:05.643915 137961619969856 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525/linen_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525_01_base/checkpoints
I0419 21:52:06.050603 137961619969856 checkpoint_manager.py:929] [process=4][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_20260419_214525/linen_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525_01_base/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7d77ed463170>
I0419 21:52:06.050780 137961619969856 checkpointing.py:302] Checkpoint manager created!
I0419 21:52:06.980591 137961619969856 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0419 21:52:06.980696 137961619969856 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0419 21:52:07.357050 137961619969856 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0419 21:52:07.357138 137961619969856 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0419 21:52:07.373212 137961619969856 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0419 21:52:07.373272 137961619969856 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0419 21:52:07.396740 137961619969856 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0419 21:52:07.396808 137961619969856 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0419 21:52:07.413008 137961619969856 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0419 21:52:07.413067 137961619969856 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0419 21:52:07.429088 137961619969856 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0419 21:52:07.429149 137961619969856 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0419 21:52:07.453469 137961619969856 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0419 21:52:07.453533 137961619969856 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0419 21:52:07.475116 137961619969856 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0419 21:52:07.475181 137961619969856 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0419 21:52:07.687529 137961619969856 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint
I0419 21:52:07.687631 137961619969856 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0419 21:52:09.106659 137961619969856 maxtext_utils.py:1821]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0419 21:52:09.106782 137961619969856 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)
I0419 21:52:09.106835 137961619969856 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)
I0419 21:52:09.106924 137961619969856 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')
I0419 21:52:09.106979 137961619969856 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)
I0419 21:52:09.107022 137961619969856 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)
I0419 21:52:09.107075 137961619969856 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)
I0419 21:52:09.107129 137961619969856 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')
I0419 21:52:09.107170 137961619969856 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)
I0419 21:52:09.107205 137961619969856 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)
I0419 21:52:09.107253 137961619969856 maxtext_utils.py:1821]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)

I0419 21:52:09.107301 137961619969856 maxtext_utils.py:1821]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')
I0419 21:52:09.592656 137961619969856 train.py:157] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0419 21:52:09.592747 137961619969856 train.py:157] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0419 21:52:09.607903 137961619969856 train.py:164] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0419 21:52:09.607960 137961619969856 train.py:164] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0419 21:52:20.672772 137961619969856 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.
I0419 21:52:20.673555 137961619969856 metric_logger.py:301] number parameters: 1.104 billion
I0419 21:52:31.893786 137961619969856 checkpointing.py:794] Waiting for step 0 to finish before checkpoint...
I0419 21:52:32.048425 137961619969856 checkpointing.py:798] Waited 0.1546192169189453 seconds for step 0 to finish before starting checkpointing.
I0419 21:52:32.050823 137961619969856 checkpoint_manager.py:2009] [process=4][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0419 21:52:32.052570 137961619969856 checkpoint_manager.py:1512] [process=4] Saving checkpoint at step 0
I0419 21:52:32.054075 137961619969856 event_tracking.py:70] [process=4] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525/linen_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525_01_base/checkpoints/0.
I0419 21:52:32.802135 137961619969856 signaling_client.py:364] Using JaxDistributedSignalingClient
I0419 21:52:32.803116 137961619969856 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0419 21:52:32.803173 137961619969856 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
I0419 21:52:33.074609 137961619969856 base_pytree_checkpoint_handler.py:154] [process=4][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.272545s
I0419 21:52:33.074784 137961619969856 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/blocking_gbytes_per_sec: 5.546 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2781205177307129 s) (per-host)
I0419 21:52:33.074844 137961619969856 base_pytree_checkpoint_handler.py:768] [process=4][thread=MainThread] Initiated Pytree async_save. Time taken: 0.278190s (batch_requests_ready=0.002315s, total_serialization_initiated=0.275799s, others=0.000076s)
I0419 21:52:33.074933 137961619969856 composite_checkpoint_handler.py:715] [process=4][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.282506s (all_items=0.000018s, per_item={'items': '0.00001812'}, temp_paths=0.282488)
I0419 21:52:33.075721 137961619969856 event_tracking.py:125] [process=4] [async] Finished blocking save in 1.02 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525/linen_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525_01_base/checkpoints/0.
I0419 21:52:33.076006 137833687807744 async_checkpointer.py:76] [process=4][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-19 22:12:33.075974
I0419 21:52:33.087162 137961619969856 checkpoint_manager.py:1560] [process=4][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0419 21:52:33.087428 137832034416384 async_checkpointer.py:280] [process=4][thread=save_finalize] Waiting for background save thread=async_save.
I0419 21:52:33.087559 137961619969856 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525/linen_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525_01_base/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776635552.0508058, 'wait_for_prev_duration_secs': 5.984306335449219e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776635552.052608, 'checkpointer_blocking_duration_secs': 1.0235517024993896, 'get_old_steps_start_time': 1776635553.076185, 'get_old_steps_duration_secs': 3.0040740966796875e-05, 'checkpoint_manager_blocking_start_time': 1776635552.0489168, 'checkpoint_manager_blocking_duration_secs': 1.0385994911193848}
I0419 21:52:33.087666 137961619969856 checkpointing.py:409] Started an asynchronous checkpoint save for step 0
I0419 21:52:33.087716 137961619969856 max_utils.py:750] 
Memstats: After params initialized:
I0419 21:52:33.087766 137961619969856 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_16(process=4,(0,4,0,0))
I0419 21:52:33.087803 137961619969856 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_17(process=4,(1,4,0,0))
I0419 21:52:33.087830 137961619969856 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_20(process=4,(0,5,0,0))
I0419 21:52:33.087853 137961619969856 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_21(process=4,(1,5,0,0))
I0419 21:52:33.397098 137961619969856 metric_logger.py:196] completed step: 0, seconds: 11.220, TFLOP/s/device: 1.211, Tokens/s/device: 182.529, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0419 21:52:33.579094 137961619969856 metric_logger.py:196] completed step: 1, seconds: 1.502, TFLOP/s/device: 9.047, Tokens/s/device: 1363.670, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0419 21:52:33.967857 137961619969856 metric_logger.py:196] completed step: 2, seconds: 0.035, TFLOP/s/device: 391.989, Tokens/s/device: 59084.877, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28637.129
I0419 21:52:34.115384 137961619969856 metric_logger.py:196] completed step: 3, seconds: 0.389, TFLOP/s/device: 34.922, Tokens/s/device: 5263.821, total_weights: 65536, loss: 9.734, lm_loss: 9.734, perplexity: 16889.203
I0419 21:52:34.410776 137961619969856 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.804, Tokens/s/device: 13385.533, total_weights: 65536, loss: 9.277, lm_loss: 9.277, perplexity: 10694.614
I0419 21:52:34.416518 137961619969856 metric_logger.py:196] completed step: 5, seconds: 0.148, TFLOP/s/device: 92.109, Tokens/s/device: 13883.616, total_weights: 65536, loss: 8.892, lm_loss: 8.892, perplexity: 7270.717
I0419 21:52:38.613190    2836 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0419 21:52:43.244442 137832074950400 array_metadata_store.py:203] [process=4][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525/linen_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525_01_base/checkpoints/0/items/array_metadatas/process_4
I0419 21:53:00.359386 137961619969856 metric_logger.py:196] completed step: 6, seconds: 0.296, TFLOP/s/device: 45.962, Tokens/s/device: 6927.953, total_weights: 65536, loss: 8.592, lm_loss: 8.592, perplexity: 5390.759
I0419 21:53:00.506978 137961619969856 metric_logger.py:196] completed step: 7, seconds: 25.796, TFLOP/s/device: 0.527, Tokens/s/device: 79.392, total_weights: 65536, loss: 8.384, lm_loss: 8.384, perplexity: 4376.905
I0419 21:53:00.654398 137961619969856 metric_logger.py:196] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.145, Tokens/s/device: 13436.910, total_weights: 65536, loss: 8.255, lm_loss: 8.255, perplexity: 3846.406
I0419 21:53:00.801179 137961619969856 checkpointing.py:794] Waiting for step 9 to finish before checkpoint...
I0419 21:53:00.801780 137961619969856 checkpointing.py:798] Waited 0.0006191730499267578 seconds for step 9 to finish before starting checkpointing.
I0419 21:53:00.804052 137961619969856 checkpoint_manager.py:2020] [process=4][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0419 21:53:11.791727 137833687807744 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/gbytes_per_sec: 40.508 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 38.99502396583557 s) (per-host)
I0419 21:53:11.791853 137833687807744 async_checkpointer.py:90] [process=4][thread=async_save] 3 Handler Commit operations completed. Time taken: 38.715736s.
I0419 21:53:23.544914 137833687807744 async_checkpointer.py:160] [process=4][thread=async_save] Background save thread done. Time taken: 50.468780s.
I0419 21:53:23.545133 137832034416384 async_checkpointer.py:288] [process=4][thread=save_finalize] Done with waiting for background save thread=async_save.
I0419 21:53:23.545196 137832034416384 async_checkpointer.py:298] [process=4][thread=save_finalize] No errors found in background save thread=async_save.
I0419 21:53:23.545246 137832034416384 checkpoint_manager.py:2137] [process=4][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0419 21:53:23.547196 137832034416384 checkpoint_manager.py:2146] [process=4][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0419 21:53:23.547369 137961619969856 checkpoint_manager.py:2032] [process=4][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0419 21:53:23.547505 137961619969856 checkpoint_manager.py:1452] Waiting for previous save to complete took 22.743452 seconds. If this number is high, consider checkpointing less frequently.
I0419 21:53:23.549378 137961619969856 checkpoint_manager.py:1512] [process=4] Saving checkpoint at step 9
I0419 21:53:23.551219 137961619969856 event_tracking.py:70] [process=4] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525/linen_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525_01_base/checkpoints/9.
I0419 21:53:24.710850 137961619969856 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0419 21:53:24.710945 137961619969856 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
I0419 21:53:24.750691 137961619969856 base_pytree_checkpoint_handler.py:154] [process=4][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.040999s
I0419 21:53:24.750862 137961619969856 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/blocking_gbytes_per_sec: 34.608 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04457235336303711 s) (per-host)
I0419 21:53:24.750910 137961619969856 base_pytree_checkpoint_handler.py:768] [process=4][thread=MainThread] Initiated Pytree async_save. Time taken: 0.044631s (batch_requests_ready=0.001911s, total_serialization_initiated=0.042655s, others=0.000065s)
I0419 21:53:24.750998 137961619969856 composite_checkpoint_handler.py:715] [process=4][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.048843s (all_items=0.000016s, per_item={'items': '0.00001597'}, temp_paths=0.048827)
I0419 21:53:24.751723 137961619969856 event_tracking.py:125] [process=4] [async] Finished blocking save in 1.20 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525/linen_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525_01_base/checkpoints/9.
I0419 21:53:24.752012 137832034416384 async_checkpointer.py:76] [process=4][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-19 22:13:24.751980
I0419 21:53:24.753971 137961619969856 checkpoint_manager.py:1560] [process=4][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0419 21:53:24.754243 137811315345152 async_checkpointer.py:280] [process=4][thread=save_finalize] Waiting for background save thread=async_save.
I0419 21:53:24.754407 137961619969856 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525/linen_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525_01_base/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776635580.804022, 'wait_for_prev_duration_secs': 22.743452310562134, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776635603.5494173, 'checkpointer_blocking_duration_secs': 1.202737808227539, 'get_old_steps_start_time': 1776635604.752178, 'get_old_steps_duration_secs': 2.9802322387695312e-05, 'checkpoint_manager_blocking_start_time': 1776635580.8020105, 'checkpoint_manager_blocking_duration_secs': 23.95236325263977}
I0419 21:53:24.754514 137961619969856 checkpointing.py:409] Started an asynchronous checkpoint save for step 9
I0419 21:53:24.754569 137961619969856 checkpoint_manager.py:2020] [process=4][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0419 21:53:33.421659 137832074950400 array_metadata_store.py:203] [process=4][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525/linen_xpk_feat_nnx_trainstate_and_training_loop_20260419_214525_01_base/checkpoints/9/items/array_metadatas/process_4
I0419 21:54:09.305633 137832034416384 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/gbytes_per_sec: 35.418 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 44.59930467605591 s) (per-host)
I0419 21:54:09.305763 137832034416384 async_checkpointer.py:90] [process=4][thread=async_save] 3 Handler Commit operations completed. Time taken: 44.553639s.
I0419 21:54:19.436594 137832034416384 async_checkpointer.py:160] [process=4][thread=async_save] Background save thread done. Time taken: 54.684454s.
I0419 21:54:19.436888 137811315345152 async_checkpointer.py:288] [process=4][thread=save_finalize] Done with waiting for background save thread=async_save.
I0419 21:54:19.437014 137811315345152 async_checkpointer.py:298] [process=4][thread=save_finalize] No errors found in background save thread=async_save.
I0419 21:54:19.437078 137811315345152 checkpoint_manager.py:2137] [process=4][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0419 21:54:19.439039 137811315345152 checkpoint_manager.py:2146] [process=4][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0419 21:54:19.439194 137961619969856 checkpoint_manager.py:2032] [process=4][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0419 21:54:19.439357 137961619969856 checkpoint_manager.py:2009] [process=4][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0419 21:54:19.440303 137961619969856 metric_logger.py:196] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.136, Tokens/s/device: 13887.759, 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: Sun Apr 19 21:54:29 UTC 2026
EXIT_CODE=0