MaxView

XPK Start: Sun Apr 19 18:59:12 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 18:59:36.902873: 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 18:59:37.440906 138465871755072 max_utils.py:273] Attempting to initialize the jax distributed system...
I0419 18:59:46.481955 138465871755072 distributed.py:149] Starting JAX distributed service on [::]:8482
I0419 18:59:46.484292 138465871755072 distributed.py:172] Connecting to JAX distributed service on mt-13-scan-layers-true-1uoqu-slice-job-0-0.mt-13-scan-layers-true-1uoqu:8482
I0419 18:59:48.195061 138465871755072 max_utils.py:284] Jax distributed system initialized!
I0419 18:59:53.215175 138465871755072 max_utils.py:800] System Information: Jax Version: 0.9.2
I0419 18:59:53.215276 138465871755072 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0419 18:59:53.215316 138465871755072 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 18:59:53.215350 138465871755072 train_utils.py:348] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0419 18:59:53.918868 138465871755072 maxtext_utils.py:1551] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0419 18:59:53.919140 138465871755072 checkpointing.py:677] Setting up checkpoint logger...
I0419 18:59:53.919199 138465871755072 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0419 18:59:53.919243 138465871755072 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0419 18:59:53.919586 138465871755072 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 0x7dee6181f5c0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0419 18:59:57.053901 138465871755072 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0419 18:59:57.054136 138465871755072 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 0x7ddad8267050>}, handler_registry=None
I0419 18:59:57.054377 138465871755072 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ddad8267050>` 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 18:59:57.054438 138465871755072 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ddad826a570>` 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 18:59:57.054473 138465871755072 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 0x7ddad8267050>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ddad8267050>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ddad826a570>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ddad826a570>}).
I0419 18:59:57.054777 138465871755072 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0419 18:59:57.054848 138465871755072 async_checkpointer.py:192] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7dd9dc573880> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0419 18:59:58.373977 138465871755072 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260419_180002/linen_xpk_main_20260419_180002_13_scan_layers_true/checkpoints
I0419 18:59:58.821112 138465871755072 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_13_scan_layers_true/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7ddad8266c00>
I0419 18:59:58.821293 138465871755072 checkpointing.py:301] Checkpoint manager created!
I0419 18:59:59.750466 138465871755072 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0419 18:59:59.750576 138465871755072 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0419 19:00:00.127344 138465871755072 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0419 19:00:00.127500 138465871755072 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0419 19:00:00.143882 138465871755072 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0419 19:00:00.143941 138465871755072 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0419 19:00:00.167493 138465871755072 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 19:00:00.167558 138465871755072 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0419 19:00:00.183855 138465871755072 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 19:00:00.183913 138465871755072 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0419 19:00:00.200168 138465871755072 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 19:00:00.200232 138465871755072 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0419 19:00:00.225534 138465871755072 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0419 19:00:00.225601 138465871755072 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0419 19:00:00.246592 138465871755072 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0419 19:00:00.246653 138465871755072 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0419 19:00:00.464700 138465871755072 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0419 19:00:00.464805 138465871755072 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0419 19:00:01.888630 138465871755072 maxtext_utils.py:1654]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0419 19:00:01.888751 138465871755072 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 19:00:01.888804 138465871755072 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 19:00:01.888861 138465871755072 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 19:00:01.888942 138465871755072 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 19:00:01.888983 138465871755072 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 19:00:01.889035 138465871755072 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 19:00:01.889086 138465871755072 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 19:00:01.889126 138465871755072 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 19:00:01.889163 138465871755072 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 19:00:01.889210 138465871755072 maxtext_utils.py:1654]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)
I0419 19:00:01.889256 138465871755072 maxtext_utils.py:1654]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')

I0419 19:00:02.386964 138465871755072 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0419 19:00:02.387061 138465871755072 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0419 19:00:02.402512 138465871755072 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0419 19:00:02.402570 138465871755072 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0419 19:00:13.250528 138465871755072 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 19:00:13.251367 138465871755072 metric_logger.py:301] number parameters: 1.104 billion
I0419 19:00:24.587805 138465871755072 checkpointing.py:772] Waiting for step 0 to finish before checkpoint...
I0419 19:00:24.740980 138465871755072 checkpointing.py:776] Waited 0.15315556526184082 seconds for step 0 to finish before starting checkpointing.
I0419 19:00:24.743402 138465871755072 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0419 19:00:24.745197 138465871755072 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 0
I0419 19:00:24.747058 138465871755072 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260419_180002/linen_xpk_main_20260419_180002_13_scan_layers_true/checkpoints/0.
I0419 19:00:25.508787 138465871755072 signaling_client.py:364] Using JaxDistributedSignalingClient
I0419 19:00:25.509743 138465871755072 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0419 19:00:25.509801 138465871755072 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 19:00:25.789164 138465871755072 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.280450s
I0419 19:00:25.789338 138465871755072 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.393 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28605198860168457 s) (per-host)
I0419 19:00:25.789392 138465871755072 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.286117s (batch_requests_ready=0.002379s, total_serialization_initiated=0.283666s, others=0.000072s)
I0419 19:00:25.789509 138465871755072 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.290273s (all_items=0.000020s, per_item={'items': '0.00001979'}, temp_paths=0.290253)
I0419 19:00:25.790343 138465871755072 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_13_scan_layers_true/checkpoints/0.
I0419 19:00:25.790651 138340397057792 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-19 19:20:25.790617
I0419 19:00:25.792819 138465871755072 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0419 19:00:25.793085 138338816227072 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0419 19:00:25.793238 138465871755072 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260419_180002/linen_xpk_main_20260419_180002_13_scan_layers_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776625224.7433846, 'wait_for_prev_duration_secs': 7.605552673339844e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776625224.7452369, 'checkpointer_blocking_duration_secs': 1.0455670356750488, 'get_old_steps_start_time': 1776625225.7908282, 'get_old_steps_duration_secs': 2.9802322387695312e-05, 'checkpoint_manager_blocking_start_time': 1776625224.7415304, 'checkpoint_manager_blocking_duration_secs': 1.0516700744628906}
I0419 19:00:25.793341 138465871755072 checkpointing.py:408] Started an asynchronous checkpoint save for step 0
I0419 19:00:25.793388 138465871755072 max_utils.py:750] 
Memstats: After params initialized:
I0419 19:00:25.793445 138465871755072 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0))
I0419 19:00:25.793479 138465871755072 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0))
I0419 19:00:25.793505 138465871755072 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0))
I0419 19:00:25.793529 138465871755072 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0))
I0419 19:00:26.101269 138465871755072 metric_logger.py:196] completed step: 0, seconds: 11.336, TFLOP/s/device: 1.199, Tokens/s/device: 180.658, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0419 19:00:26.280742 138465871755072 metric_logger.py:196] completed step: 1, seconds: 1.512, TFLOP/s/device: 8.987, Tokens/s/device: 1354.613, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0419 19:00:26.693119 138465871755072 metric_logger.py:196] completed step: 2, seconds: 0.032, TFLOP/s/device: 418.942, Tokens/s/device: 63147.509, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28637.129
I0419 19:00:26.840256 138465871755072 metric_logger.py:196] completed step: 3, seconds: 0.412, TFLOP/s/device: 32.944, Tokens/s/device: 4965.607, total_weights: 65536, loss: 9.734, lm_loss: 9.734, perplexity: 16889.203
I0419 19:00:27.135471 138465871755072 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.743, Tokens/s/device: 13376.354, total_weights: 65536, loss: 9.277, lm_loss: 9.277, perplexity: 10694.614
I0419 19:00:27.142028 138465871755072 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.317, Tokens/s/device: 13915.029, total_weights: 65536, loss: 8.892, lm_loss: 8.892, perplexity: 7270.717
I0419 19:00:29.652450    2756 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0419 19:00:32.048544 138339300521728 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_13_scan_layers_true/checkpoints/0/items/array_metadatas/process_6
I0419 19:00:49.035508 138465871755072 metric_logger.py:196] completed step: 6, seconds: 0.296, TFLOP/s/device: 45.893, Tokens/s/device: 6917.493, total_weights: 65536, loss: 8.592, lm_loss: 8.592, perplexity: 5390.759
I0419 19:00:49.183048 138465871755072 metric_logger.py:196] completed step: 7, seconds: 21.747, TFLOP/s/device: 0.625, Tokens/s/device: 94.174, total_weights: 65536, loss: 8.384, lm_loss: 8.384, perplexity: 4376.905
I0419 19:00:49.330325 138465871755072 metric_logger.py:196] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.273, Tokens/s/device: 13456.156, total_weights: 65536, loss: 8.255, lm_loss: 8.255, perplexity: 3846.406
I0419 19:00:49.477121 138465871755072 checkpointing.py:772] Waiting for step 9 to finish before checkpoint...
I0419 19:00:49.477711 138465871755072 checkpointing.py:776] Waited 0.0006117820739746094 seconds for step 9 to finish before starting checkpointing.
I0419 19:00:49.479758 138465871755072 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0419 19:01:03.635817 138340397057792 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 41.424 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 38.1324942111969 s) (per-host)
I0419 19:01:03.635941 138340397057792 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 37.845180s.
I0419 19:01:12.870034 138340397057792 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 47.079257s.
I0419 19:01:12.870322 138338816227072 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0419 19:01:12.870458 138338816227072 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0419 19:01:12.870512 138338816227072 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0419 19:01:12.875349 138338816227072 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0419 19:01:12.875551 138465871755072 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 19:01:12.875690 138465871755072 checkpoint_manager.py:1452] Waiting for previous save to complete took 23.395932 seconds. If this number is high, consider checkpointing less frequently.
I0419 19:01:12.877540 138465871755072 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 9
I0419 19:01:12.879568 138465871755072 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260419_180002/linen_xpk_main_20260419_180002_13_scan_layers_true/checkpoints/9.
I0419 19:01:13.917596 138465871755072 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0419 19:01:13.917690 138465871755072 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 19:01:13.959670 138465871755072 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.043158s
I0419 19:01:13.959835 138465871755072 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 32.998 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04674816131591797 s) (per-host)
I0419 19:01:13.959885 138465871755072 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.046808s (batch_requests_ready=0.001941s, total_serialization_initiated=0.044801s, others=0.000066s)
I0419 19:01:13.959973 138465871755072 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.050825s (all_items=0.000016s, per_item={'items': '0.00001597'}, temp_paths=0.050809)
I0419 19:01:13.960662 138465871755072 event_tracking.py:125] [process=6] [async] Finished blocking save in 1.08 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260419_180002/linen_xpk_main_20260419_180002_13_scan_layers_true/checkpoints/9.
I0419 19:01:13.960939 138338816227072 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-19 19:21:13.960918
I0419 19:01:13.962881 138465871755072 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0419 19:01:13.963182 138339300521728 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0419 19:01:13.963344 138465871755072 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260419_180002/linen_xpk_main_20260419_180002_13_scan_layers_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776625249.479729, 'wait_for_prev_duration_secs': 23.395931720733643, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776625272.8775775, 'checkpointer_blocking_duration_secs': 1.0834553241729736, 'get_old_steps_start_time': 1776625273.9610536, 'get_old_steps_duration_secs': 3.147125244140625e-05, 'checkpoint_manager_blocking_start_time': 1776625249.4779375, 'checkpoint_manager_blocking_duration_secs': 24.48537254333496}
I0419 19:01:13.963465 138465871755072 checkpointing.py:408] Started an asynchronous checkpoint save for step 9
I0419 19:01:13.963511 138465871755072 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0419 19:01:20.272522 138334521259776 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_13_scan_layers_true/checkpoints/9/items/array_metadatas/process_6
I0419 19:01:57.358700 138338816227072 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 36.358 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 43.4455771446228 s) (per-host)
I0419 19:01:57.358824 138338816227072 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 43.397813s.
I0419 19:02:04.627181 138338816227072 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 50.666154s.
I0419 19:02:04.627482 138339300521728 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0419 19:02:04.627610 138339300521728 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0419 19:02:04.627660 138339300521728 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0419 19:02:04.629117 138339300521728 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0419 19:02:04.629308 138465871755072 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 19:02:04.629487 138465871755072 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0419 19:02:04.630610 138465871755072 metric_logger.py:196] completed step: 9, seconds: 0.148, TFLOP/s/device: 92.094, Tokens/s/device: 13881.452, 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 19:02:12 UTC 2026
EXIT_CODE=0