MaxView

XPK Start: Sat Apr 18 19:07:40 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 19:08:04.016859: 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 19:08:04.544170 134895158245184 max_utils.py:273] Attempting to initialize the jax distributed system...
I0418 19:08:13.585237 134895158245184 distributed.py:149] Starting JAX distributed service on [::]:8482
I0418 19:08:13.587556 134895158245184 distributed.py:172] Connecting to JAX distributed service on mt-13-scan-layers-true-fmgzw-slice-job-0-0.mt-13-scan-layers-true-fmgzw:8482
I0418 19:08:14.777020 134895158245184 max_utils.py:284] Jax distributed system initialized!
I0418 19:08:20.959322 134895158245184 max_utils.py:800] System Information: Jax Version: 0.9.2
I0418 19:08:20.959425 134895158245184 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0418 19:08:20.959484 134895158245184 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 19:08:20.959522 134895158245184 train_utils.py:348] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0418 19:08:21.648977 134895158245184 maxtext_utils.py:1551] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0418 19:08:21.649245 134895158245184 checkpointing.py:677] Setting up checkpoint logger...
I0418 19:08:21.649300 134895158245184 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0418 19:08:21.649343 134895158245184 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0418 19:08:21.649681 134895158245184 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 0x7aaf20f141a0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0418 19:08:24.951020 134895158245184 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0418 19:08:24.951252 134895158245184 checkpoint_manager.py:708] [process=5][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7a9acc487bf0>}, handler_registry=None
I0418 19:08:24.951501 134895158245184 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7a9acc487bf0>` 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 19:08:24.951549 134895158245184 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a9acc32f5c0>` 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 19:08:24.951584 134895158245184 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 0x7a9acc487bf0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7a9acc487bf0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a9acc32f5c0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a9acc32f5c0>}).
I0418 19:08:24.951901 134895158245184 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0418 19:08:24.951973 134895158245184 async_checkpointer.py:192] [process=5][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7a99c45ff880> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0418 19:08:26.987023 134895158245184 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_13_scan_layers_true/checkpoints
I0418 19:08:27.855195 134895158245184 checkpoint_manager.py:929] [process=5][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_main_20260418_180002/linen_xpk_main_20260418_180002_13_scan_layers_true/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7a9acc32bc50>
I0418 19:08:27.855361 134895158245184 checkpointing.py:301] Checkpoint manager created!
I0418 19:08:28.780652 134895158245184 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0418 19:08:28.780764 134895158245184 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0418 19:08:29.157340 134895158245184 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0418 19:08:29.157423 134895158245184 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0418 19:08:29.173671 134895158245184 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0418 19:08:29.173735 134895158245184 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0418 19:08:29.197433 134895158245184 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 19:08:29.197514 134895158245184 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0418 19:08:29.213881 134895158245184 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 19:08:29.213942 134895158245184 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0418 19:08:29.230174 134895158245184 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 19:08:29.230232 134895158245184 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0418 19:08:29.255619 134895158245184 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0418 19:08:29.255688 134895158245184 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0418 19:08:29.276583 134895158245184 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0418 19:08:29.276648 134895158245184 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0418 19:08:29.493539 134895158245184 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0418 19:08:29.493644 134895158245184 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0418 19:08:30.907189 134895158245184 maxtext_utils.py:1654]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0418 19:08:30.907311 134895158245184 maxtext_utils.py:1654]  params/params/decoder/layers/mlp/wi_0/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0418 19:08:30.907362 134895158245184 maxtext_utils.py:1654]  params/params/decoder/layers/mlp/wi_1/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0418 19:08:30.907418 134895158245184 maxtext_utils.py:1654]  params/params/decoder/layers/mlp/wo/kernel
    Shape:     float32[7168,16,2048]
    Logical:   P('mlp', 'layers', 'embed')
    Physical:  (None, None, 'fsdp')
I0418 19:08:30.907486 134895158245184 maxtext_utils.py:1654]  params/params/decoder/layers/post_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0418 19:08:30.907528 134895158245184 maxtext_utils.py:1654]  params/params/decoder/layers/pre_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0418 19:08:30.907579 134895158245184 maxtext_utils.py:1654]  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 19:08:30.907629 134895158245184 maxtext_utils.py:1654]  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 19:08:30.907678 134895158245184 maxtext_utils.py:1654]  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 19:08:30.907720 134895158245184 maxtext_utils.py:1654]  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 19:08:30.907767 134895158245184 maxtext_utils.py:1654]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)
I0418 19:08:30.907814 134895158245184 maxtext_utils.py:1654]  params/params/token_embedder/embedding

    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')
I0418 19:08:31.397019 134895158245184 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0418 19:08:31.397113 134895158245184 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0418 19:08:31.412441 134895158245184 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0418 19:08:31.412510 134895158245184 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0418 19:08:42.264530 134895158245184 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 19:08:42.265280 134895158245184 metric_logger.py:301] number parameters: 1.104 billion
I0418 19:08:53.581965 134895158245184 checkpointing.py:772] Waiting for step 0 to finish before checkpoint...
I0418 19:08:53.735486 134895158245184 checkpointing.py:776] Waited 0.15348434448242188 seconds for step 0 to finish before starting checkpointing.
I0418 19:08:53.737769 134895158245184 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0418 19:08:53.739607 134895158245184 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 0
I0418 19:08:53.741130 134895158245184 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_13_scan_layers_true/checkpoints/0.
I0418 19:08:54.492208 134895158245184 signaling_client.py:364] Using JaxDistributedSignalingClient
I0418 19:08:54.493223 134895158245184 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0418 19:08:54.493281 134895158245184 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 19:08:54.767407 134895158245184 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.275273s
I0418 19:08:54.767588 134895158245184 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 5.496 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28068017959594727 s) (per-host)
I0418 19:08:54.767643 134895158245184 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.280746s (batch_requests_ready=0.002210s, total_serialization_initiated=0.278462s, others=0.000073s)
I0418 19:08:54.767745 134895158245184 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.284901s (all_items=0.000018s, per_item={'items': '0.00001764'}, temp_paths=0.284883)
I0418 19:08:54.768565 134895158245184 event_tracking.py:125] [process=5] [async] Finished blocking save in 1.03 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_13_scan_layers_true/checkpoints/0.
I0418 19:08:54.768901 134766141634304 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-18 19:28:54.768862
I0418 19:08:54.780236 134895158245184 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0418 19:08:54.780526 134765025113856 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save.
I0418 19:08:54.780660 134895158245184 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_13_scan_layers_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776539333.7377515, 'wait_for_prev_duration_secs': 5.984306335449219e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776539333.739645, 'checkpointer_blocking_duration_secs': 1.0294127464294434, 'get_old_steps_start_time': 1776539334.7690845, 'get_old_steps_duration_secs': 2.9087066650390625e-05, 'checkpoint_manager_blocking_start_time': 1776539333.7358968, 'checkpoint_manager_blocking_duration_secs': 1.0447235107421875}
I0418 19:08:54.780775 134895158245184 checkpointing.py:408] Started an asynchronous checkpoint save for step 0
I0418 19:08:54.780824 134895158245184 max_utils.py:750] 
Memstats: After params initialized:
I0418 19:08:54.780874 134895158245184 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_18(process=5,(2,4,0,0))
I0418 19:08:54.780907 134895158245184 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_19(process=5,(3,4,0,0))
I0418 19:08:54.780931 134895158245184 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_22(process=5,(2,5,0,0))
I0418 19:08:54.780955 134895158245184 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_23(process=5,(3,5,0,0))
I0418 19:08:55.092705 134895158245184 metric_logger.py:196] completed step: 0, seconds: 11.317, TFLOP/s/device: 1.201, Tokens/s/device: 180.973, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0418 19:08:55.288127 134895158245184 metric_logger.py:196] completed step: 1, seconds: 1.509, TFLOP/s/device: 9.003, Tokens/s/device: 1357.011, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0418 19:08:55.696110 134895158245184 metric_logger.py:196] completed step: 2, seconds: 0.048, TFLOP/s/device: 281.336, Tokens/s/device: 42406.046, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28637.129
I0418 19:08:55.843300 134895158245184 metric_logger.py:196] completed step: 3, seconds: 0.408, TFLOP/s/device: 33.284, Tokens/s/device: 5016.890, total_weights: 65536, loss: 9.734, lm_loss: 9.734, perplexity: 16889.203
I0418 19:08:56.138497 134895158245184 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.929, Tokens/s/device: 13404.370, total_weights: 65536, loss: 9.277, lm_loss: 9.277, perplexity: 10694.614
I0418 19:08:56.144357 134895158245184 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.328, Tokens/s/device: 13916.636, total_weights: 65536, loss: 8.892, lm_loss: 8.892, perplexity: 7270.717
I0418 19:08:59.554563    2874 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0418 19:09:01.896274 134765067892480 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_13_scan_layers_true/checkpoints/0/items/array_metadatas/process_5
I0418 19:09:19.469968 134895158245184 metric_logger.py:196] completed step: 6, seconds: 0.296, TFLOP/s/device: 45.948, Tokens/s/device: 6925.774, total_weights: 65536, loss: 8.592, lm_loss: 8.592, perplexity: 5390.759
I0418 19:09:19.617210 134895158245184 metric_logger.py:196] completed step: 7, seconds: 23.179, TFLOP/s/device: 0.586, Tokens/s/device: 88.356, total_weights: 65536, loss: 8.384, lm_loss: 8.384, perplexity: 4376.905
I0418 19:09:19.765043 134895158245184 metric_logger.py:196] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.284, Tokens/s/device: 13457.924, total_weights: 65536, loss: 8.255, lm_loss: 8.255, perplexity: 3846.406
I0418 19:09:19.911949 134895158245184 checkpointing.py:772] Waiting for step 9 to finish before checkpoint...
I0418 19:09:19.912597 134895158245184 checkpointing.py:776] Waited 0.0006701946258544922 seconds for step 9 to finish before starting checkpointing.
I0418 19:09:19.914944 134895158245184 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0418 19:09:30.793346 134766141634304 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 43.507 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 36.306397438049316 s) (per-host)
I0418 19:09:30.793490 134766141634304 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 36.024473s.
I0418 19:09:41.430649 134766141634304 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 46.661617s.
I0418 19:09:41.430930 134765025113856 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save.
I0418 19:09:41.431061 134765025113856 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save.
I0418 19:09:41.431111 134765025113856 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0418 19:09:41.432601 134765025113856 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0418 19:09:41.432762 134895158245184 checkpoint_manager.py:2032] [process=5][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0418 19:09:41.432891 134895158245184 checkpoint_manager.py:1452] Waiting for previous save to complete took 21.517948 seconds. If this number is high, consider checkpointing less frequently.
I0418 19:09:41.434678 134895158245184 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 9
I0418 19:09:41.436726 134895158245184 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_13_scan_layers_true/checkpoints/9.
I0418 19:09:42.163845 134895158245184 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0418 19:09:42.163940 134895158245184 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 19:09:42.199553 134895158245184 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.036779s
I0418 19:09:42.199711 134895158245184 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 38.419 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.040151119232177734 s) (per-host)
I0418 19:09:42.199758 134895158245184 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.040207s (batch_requests_ready=0.001735s, total_serialization_initiated=0.038409s, others=0.000062s)
I0418 19:09:42.199840 134895158245184 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.044278s (all_items=0.000033s, per_item={'items': '0.00003266'}, temp_paths=0.044245)
I0418 19:09:42.200522 134895158245184 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.77 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_13_scan_layers_true/checkpoints/9.
I0418 19:09:42.200856 134765025113856 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-18 19:29:42.200819
I0418 19:09:42.202786 134895158245184 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0418 19:09:42.203045 134741260998400 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save.
I0418 19:09:42.203207 134895158245184 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_13_scan_layers_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776539359.9149146, 'wait_for_prev_duration_secs': 21.517947912216187, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776539381.434716, 'checkpointer_blocking_duration_secs': 0.7662858963012695, 'get_old_steps_start_time': 1776539382.2010262, 'get_old_steps_duration_secs': 2.9802322387695312e-05, 'checkpoint_manager_blocking_start_time': 1776539359.9128253, 'checkpoint_manager_blocking_duration_secs': 22.290345430374146}
I0418 19:09:42.203318 134895158245184 checkpointing.py:408] Started an asynchronous checkpoint save for step 9
I0418 19:09:42.203365 134895158245184 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0418 19:09:50.357089 134765067892480 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260418_180002/linen_xpk_main_20260418_180002_13_scan_layers_true/checkpoints/9/items/array_metadatas/process_5
I0418 19:10:25.263633 134765025113856 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 36.646 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 43.104031801223755 s) (per-host)
I0418 19:10:25.263773 134765025113856 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 43.062795s.
I0418 19:10:35.901714 134765025113856 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 53.700731s.
I0418 19:10:35.902004 134741260998400 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save.
I0418 19:10:35.902141 134741260998400 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save.
I0418 19:10:35.902203 134741260998400 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0418 19:10:35.903820 134741260998400 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0418 19:10:35.903981 134895158245184 checkpoint_manager.py:2032] [process=5][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0418 19:10:35.904128 134895158245184 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0418 19:10:35.905076 134895158245184 metric_logger.py:196] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.288, Tokens/s/device: 13910.586, 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 19:10:46 UTC 2026
EXIT_CODE=0