XPK Start: Sun Apr 19 18:29:38 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 18:30:03.585125: 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 18:30:04.122726 131973296785216 max_utils.py:273] Attempting to initialize the jax distributed system...
I0419 18:30:13.164701 131973296785216 distributed.py:149] Starting JAX distributed service on [::]:8482
I0419 18:30:13.167041 131973296785216 distributed.py:172] Connecting to JAX distributed service on mt-07-eval-4sae1-slice-job-0-0.mt-07-eval-4sae1:8482
I0419 18:30:14.824723 131973296785216 max_utils.py:284] Jax distributed system initialized!
I0419 18:30:20.956590 131973296785216 max_utils.py:800] System Information: Jax Version: 0.9.2
I0419 18:30:20.956693 131973296785216 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0419 18:30:20.956733 131973296785216 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 18:30:20.956768 131973296785216 train_utils.py:348] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0419 18:30:21.653605 131973296785216 maxtext_utils.py:1551] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0419 18:30:21.653874 131973296785216 checkpointing.py:677] Setting up checkpoint logger...
I0419 18:30:21.653925 131973296785216 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0419 18:30:21.653969 131973296785216 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0419 18:30:21.654289 131973296785216 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 0x7806b5f38050>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0419 18:30:24.528636 131973296785216 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0419 18:30:24.528867 131973296785216 checkpoint_manager.py:708] [process=6][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x77f2d8430f50>}, handler_registry=None
I0419 18:30:24.529101 131973296785216 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x77f2d8430f50>` 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 18:30:24.529156 131973296785216 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x77f2d8436ed0>` 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 18:30:24.529192 131973296785216 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 0x77f2d8430f50>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x77f2d8430f50>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x77f2d8436ed0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x77f2d8436ed0>}).
I0419 18:30:24.529528 131973296785216 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0419 18:30:24.529599 131973296785216 async_checkpointer.py:192] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x77f2987837e0> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0419 18:30:26.461011 131973296785216 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260419_180002/linen_xpk_main_20260419_180002_07_eval/checkpoints
I0419 18:30:26.922790 131973296785216 checkpoint_manager.py:929] [process=6][thread=MainThread] CheckpointManager created, primary_host=0, CheckpointManagerOptions=CheckpointManagerOptions(save_interval_steps=1, max_to_keep=None, keep_time_interval=None, keep_period=None, should_keep_fn=None, best_fn=None, best_mode='max', keep_checkpoints_without_metrics=True, step_prefix=None, step_format_fixed_length=None, step_name_format=None, create=True, cleanup_tmp_directories=False, save_on_steps=frozenset(), single_host_load_and_broadcast=False, todelete_subdir=None, todelete_full_path=None, enable_background_delete=False, read_only=False, enable_async_checkpointing=True, async_options=None, multiprocessing_options=MultiprocessingOptions(primary_host=0, active_processes=None, barrier_sync_key_prefix=None), should_save_fn=None, file_options=FileOptions(path_permission_mode=None), save_root_metadata=True, temporary_path_class=None, save_decision_policy=FixedIntervalPolicy(interval=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_20260419_180002/linen_xpk_main_20260419_180002_07_eval/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x77f2e022b440>
I0419 18:30:26.922953 131973296785216 checkpointing.py:301] Checkpoint manager created!
I0419 18:30:27.845157 131973296785216 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0419 18:30:27.845269 131973296785216 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0419 18:30:28.227533 131973296785216 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0419 18:30:28.227621 131973296785216 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0419 18:30:28.243757 131973296785216 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0419 18:30:28.243823 131973296785216 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0419 18:30:28.267262 131973296785216 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 18:30:28.267329 131973296785216 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0419 18:30:28.289037 131973296785216 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 18:30:28.289136 131973296785216 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0419 18:30:28.305759 131973296785216 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 18:30:28.305831 131973296785216 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0419 18:30:28.331428 131973296785216 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0419 18:30:28.331499 131973296785216 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0419 18:30:28.352385 131973296785216 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0419 18:30:28.352475 131973296785216 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0419 18:30:28.576989 131973296785216 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0419 18:30:28.577100 131973296785216 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0419 18:30:30.006798 131973296785216 maxtext_utils.py:1654] params/params/decoder/decoder_norm/scale
Shape: float32[2048]
Logical: P('norm',)
Physical: (None,)
I0419 18:30:30.006922 131973296785216 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)
I0419 18:30:30.006975 131973296785216 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)
I0419 18:30:30.007032 131973296785216 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')
I0419 18:30:30.007090 131973296785216 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)
I0419 18:30:30.007130 131973296785216 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)
I0419 18:30:30.007184 131973296785216 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)
I0419 18:30:30.007236 131973296785216 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')
I0419 18:30:30.007277 131973296785216 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)
I0419 18:30:30.007315 131973296785216 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)
I0419 18:30:30.007363 131973296785216 maxtext_utils.py:1654] params/params/decoder/logits_dense/kernel
Shape: float32[2048,32000]
Logical: P('embed_vocab', 'vocab')
Physical: ('fsdp', None)
I0419 18:30:30.007436 131973296785216 maxtext_utils.py:1654] params/params/token_embedder/embedding
Shape: float32[32000,2048]
Logical: P('vocab', 'embed_vocab')
Physical: (None, 'fsdp')
I0419 18:30:30.493458 131973296785216 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0419 18:30:30.493551 131973296785216 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0419 18:30:30.508754 131973296785216 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0419 18:30:30.508815 131973296785216 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0419 18:30:41.481258 131973296785216 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 18:30:41.482091 131973296785216 metric_logger.py:301] number parameters: 1.104 billion
I0419 18:30:52.902930 131973296785216 checkpointing.py:772] Waiting for step 0 to finish before checkpoint...
I0419 18:30:53.055904 131973296785216 checkpointing.py:776] Waited 0.15295767784118652 seconds for step 0 to finish before starting checkpointing.
I0419 18:30:53.058470 131973296785216 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0419 18:30:53.060133 131973296785216 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 0
I0419 18:30:53.061850 131973296785216 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260419_180002/linen_xpk_main_20260419_180002_07_eval/checkpoints/0.
I0419 18:30:53.825946 131973296785216 signaling_client.py:364] Using JaxDistributedSignalingClient
I0419 18:30:53.827016 131973296785216 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0419 18:30:53.827072 131973296785216 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 18:30:54.104160 131973296785216 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.278282s
I0419 18:30:54.104331 131973296785216 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.437 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2837355136871338 s) (per-host)
I0419 18:30:54.104387 131973296785216 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.283801s (batch_requests_ready=0.002205s, total_serialization_initiated=0.281522s, others=0.000074s)
I0419 18:30:54.104492 131973296785216 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.287966s (all_items=0.000017s, per_item={'items': '0.00001669'}, temp_paths=0.287950)
I0419 18:30:54.105276 131973296785216 event_tracking.py:125] [process=6] [async] Finished blocking save in 1.05 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260419_180002/linen_xpk_main_20260419_180002_07_eval/checkpoints/0.
I0419 18:30:54.105624 131844817282816 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-19 18:50:54.105587
I0419 18:30:54.110279 131973296785216 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0419 18:30:54.110561 131843168913152 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0419 18:30:54.110688 131973296785216 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260419_180002/linen_xpk_main_20260419_180002_07_eval/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776623453.0584524, 'wait_for_prev_duration_secs': 6.008148193359375e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776623453.060219, 'checkpointer_blocking_duration_secs': 1.0455586910247803, 'get_old_steps_start_time': 1776623454.105804, 'get_old_steps_duration_secs': 3.170967102050781e-05, 'checkpoint_manager_blocking_start_time': 1776623453.056454, 'checkpoint_manager_blocking_duration_secs': 1.054192304611206}
I0419 18:30:54.110799 131973296785216 checkpointing.py:408] Started an asynchronous checkpoint save for step 0
I0419 18:30:54.110847 131973296785216 max_utils.py:750]
Memstats: After params initialized:
I0419 18:30:54.110895 131973296785216 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0))
I0419 18:30:54.110927 131973296785216 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0))
I0419 18:30:54.110953 131973296785216 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0))
I0419 18:30:54.110978 131973296785216 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0))
I0419 18:30:54.423501 131973296785216 metric_logger.py:196] completed step: 0, seconds: 11.421, TFLOP/s/device: 1.190, Tokens/s/device: 179.323, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0419 18:30:54.609318 131973296785216 metric_logger.py:196] completed step: 1, seconds: 1.519, TFLOP/s/device: 8.945, Tokens/s/device: 1348.300, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0419 18:30:55.024252 131973296785216 metric_logger.py:196] completed step: 2, seconds: 0.039, TFLOP/s/device: 351.034, Tokens/s/device: 52911.693, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28637.129
I0419 18:30:55.171479 131973296785216 metric_logger.py:196] completed step: 3, seconds: 0.415, TFLOP/s/device: 32.737, Tokens/s/device: 4934.417, total_weights: 65536, loss: 9.734, lm_loss: 9.734, perplexity: 16889.203
I0419 18:30:55.466487 131973296785216 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.703, Tokens/s/device: 13370.241, total_weights: 65536, loss: 9.277, lm_loss: 9.277, perplexity: 10694.614
I0419 18:30:55.472471 131973296785216 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.335, Tokens/s/device: 13917.676, total_weights: 65536, loss: 8.892, lm_loss: 8.892, perplexity: 7270.717
I0419 18:30:57.890576 2783 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0419 18:31:00.422579 131843177305856 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260419_180002/linen_xpk_main_20260419_180002_07_eval/checkpoints/0/items/array_metadatas/process_6
I0419 18:31:18.233723 131973296785216 metric_logger.py:196] completed step: 6, seconds: 0.295, TFLOP/s/device: 45.985, Tokens/s/device: 6931.400, total_weights: 65536, loss: 8.592, lm_loss: 8.592, perplexity: 5390.759
I0419 18:31:18.381006 131973296785216 metric_logger.py:196] completed step: 7, seconds: 22.615, TFLOP/s/device: 0.601, Tokens/s/device: 90.561, total_weights: 65536, loss: 8.384, lm_loss: 8.384, perplexity: 4376.905
I0419 18:31:18.528430 131973296785216 metric_logger.py:196] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.137, Tokens/s/device: 13435.764, total_weights: 65536, loss: 8.255, lm_loss: 8.255, perplexity: 3846.406
I0419 18:31:18.675166 131973296785216 checkpointing.py:772] Waiting for step 9 to finish before checkpoint...
I0419 18:31:18.675834 131973296785216 checkpointing.py:776] Waited 0.0006954669952392578 seconds for step 9 to finish before starting checkpointing.
I0419 18:31:18.677968 131973296785216 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0419 18:31:31.978878 131844817282816 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 41.396 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 38.15824365615845 s) (per-host)
I0419 18:31:31.979001 131844817282816 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 37.873265s.
I0419 18:31:40.220470 131844817282816 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 46.114717s.
I0419 18:31:40.220738 131843168913152 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0419 18:31:40.220858 131843168913152 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0419 18:31:40.220910 131843168913152 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0419 18:31:40.223660 131843168913152 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0419 18:31:40.223840 131973296785216 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0419 18:31:40.223972 131973296785216 checkpoint_manager.py:1452] Waiting for previous save to complete took 21.546000 seconds. If this number is high, consider checkpointing less frequently.
I0419 18:31:40.225724 131973296785216 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 9
I0419 18:31:40.227663 131973296785216 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260419_180002/linen_xpk_main_20260419_180002_07_eval/checkpoints/9.
I0419 18:31:40.776001 131973296785216 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0419 18:31:40.776098 131973296785216 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 18:31:40.808231 131973296785216 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.033342s
I0419 18:31:40.808384 131973296785216 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 41.934 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.03678607940673828 s) (per-host)
I0419 18:31:40.808447 131973296785216 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.036859s (batch_requests_ready=0.001805s, total_serialization_initiated=0.034973s, others=0.000081s)
I0419 18:31:40.808534 131973296785216 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.040922s (all_items=0.000016s, per_item={'items': '0.00001621'}, temp_paths=0.040906)
I0419 18:31:40.809230 131973296785216 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.58 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260419_180002/linen_xpk_main_20260419_180002_07_eval/checkpoints/9.
I0419 18:31:40.809590 131843168913152 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-19 18:51:40.809559
I0419 18:31:40.820924 131973296785216 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0419 18:31:40.821175 131844259190528 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0419 18:31:40.821319 131973296785216 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260419_180002/linen_xpk_main_20260419_180002_07_eval/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776623478.67794, 'wait_for_prev_duration_secs': 21.54599952697754, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776623500.2257645, 'checkpointer_blocking_duration_secs': 0.5839657783508301, 'get_old_steps_start_time': 1776623500.8097553, 'get_old_steps_duration_secs': 3.147125244140625e-05, 'checkpoint_manager_blocking_start_time': 1776623478.6760862, 'checkpoint_manager_blocking_duration_secs': 22.14519739151001}
I0419 18:31:40.821445 131973296785216 checkpointing.py:408] Started an asynchronous checkpoint save for step 9
I0419 18:31:40.821495 131973296785216 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0419 18:31:46.073509 131843177305856 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260419_180002/linen_xpk_main_20260419_180002_07_eval/checkpoints/9/items/array_metadatas/process_6
I0419 18:32:23.707731 131843168913152 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 36.789 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.93610143661499 s) (per-host)
I0419 18:32:23.707841 131843168913152 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.898137s.
I0419 18:32:30.151853 131843168913152 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 49.342134s.
I0419 18:32:30.152080 131844259190528 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0419 18:32:30.152146 131844259190528 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0419 18:32:30.152193 131844259190528 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0419 18:32:30.153878 131844259190528 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0419 18:32:30.154047 131973296785216 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0419 18:32:30.154206 131973296785216 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0419 18:32:30.155069 131973296785216 metric_logger.py:196] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.350, Tokens/s/device: 13919.947, 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 18:32:38 UTC 2026
EXIT_CODE=0