MaxView

XPK Start: Wed Apr 22 13:21:10 UTC 2026
PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used.
2026-04-22 13:21:35.274682: 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)
I0422 13:21:35.456151 138632849213248 max_utils.py:273] Attempting to initialize the jax distributed system...
I0422 13:21:44.499451 138632849213248 distributed.py:149] Starting JAX distributed service on [::]:8482
I0422 13:21:44.501834 138632849213248 distributed.py:172] Connecting to JAX distributed service on mt-11-optimizer-offload-2w0qm-slice-job-0-0.mt-11-optimizer-offload-2w0qm:8482
I0422 13:21:45.972197 138632849213248 max_utils.py:284] Jax distributed system initialized!
I0422 13:21:51.008584 138632849213248 max_utils.py:800] System Information: Jax Version: 0.9.2
I0422 13:21:51.008691 138632849213248 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0422 13:21:51.008731 138632849213248 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
I0422 13:21:51.008766 138632849213248 train_utils.py:378] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0422 13:21:51.708145 138632849213248 maxtext_utils.py:1718] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0422 13:21:51.708729 138632849213248 maxtext_utils.py:1718] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0422 13:21:51.708908 138632849213248 checkpointing.py:688] Setting up checkpoint logger...
I0422 13:21:51.708956 138632849213248 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True
I0422 13:21:51.708998 138632849213248 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0422 13:21:51.709364 138632849213248 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 0x7e1558f7a600>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0422 13:21:54.675906 138632849213248 checkpointing.py:266] Enabling policy for fixed interval checkpointing.
I0422 13:21:54.676158 138632849213248 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 0x7e1435c2e600>}, handler_registry=None
I0422 13:21:54.676398 138632849213248 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e1435c2e600>` 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`.
I0422 13:21:54.676446 138632849213248 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e0164717770>` 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`.
I0422 13:21:54.676482 138632849213248 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 0x7e1435c2e600>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7e1435c2e600>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e0164717770>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7e0164717770>}).
I0422 13:21:54.676801 138632849213248 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0422 13:21:54.676870 138632849213248 async_checkpointer.py:192] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7e01644c4540> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0422 13:21:55.826504 138632849213248 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/linen_xpk_feat_nnx_post_train_fixes_20260422_123906_11_optimizer_offload_true/checkpoints
I0422 13:21:55.855051 138632849213248 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_feat_nnx_post_train_fixes_20260422_123906/linen_xpk_feat_nnx_post_train_fixes_20260422_123906_11_optimizer_offload_true/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7e01ac191490>
I0422 13:21:55.855205 138632849213248 checkpointing.py:302] Checkpoint manager created!
I0422 13:21:56.784028 138632849213248 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0422 13:21:56.784160 138632849213248 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0422 13:21:57.164087 138632849213248 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0422 13:21:57.164188 138632849213248 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0422 13:21:57.180592 138632849213248 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0422 13:21:57.180648 138632849213248 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0422 13:21:57.204426 138632849213248 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0422 13:21:57.204494 138632849213248 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0422 13:21:57.220935 138632849213248 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0422 13:21:57.220994 138632849213248 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0422 13:21:57.237487 138632849213248 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0422 13:21:57.237544 138632849213248 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0422 13:21:57.262381 138632849213248 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0422 13:21:57.262448 138632849213248 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0422 13:21:57.283466 138632849213248 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0422 13:21:57.283530 138632849213248 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0422 13:21:57.504001 138632849213248 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint
I0422 13:21:57.504124 138632849213248 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0422 13:21:59.160892 138632849213248 maxtext_utils.py:1827]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0422 13:21:59.161018 138632849213248 maxtext_utils.py:1827]  params/params/decoder/layers/mlp/wi_0/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0422 13:21:59.161071 138632849213248 maxtext_utils.py:1827]  params/params/decoder/layers/mlp/wi_1/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0422 13:21:59.161187 138632849213248 maxtext_utils.py:1827]  params/params/decoder/layers/mlp/wo/kernel
    Shape:     float32[7168,16,2048]
    Logical:   P('mlp', 'layers', 'embed')
    Physical:  (None, None, 'fsdp')
I0422 13:21:59.161253 138632849213248 maxtext_utils.py:1827]  params/params/decoder/layers/post_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0422 13:21:59.161292 138632849213248 maxtext_utils.py:1827]  params/params/decoder/layers/pre_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0422 13:21:59.161347 138632849213248 maxtext_utils.py:1827]  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)
I0422 13:21:59.161400 138632849213248 maxtext_utils.py:1827]  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')
I0422 13:21:59.161441 138632849213248 maxtext_utils.py:1827]  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)
I0422 13:21:59.161477 138632849213248 maxtext_utils.py:1827]  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)
I0422 13:21:59.161524 138632849213248 maxtext_utils.py:1827]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)
I0422 13:21:59.161569 138632849213248 maxtext_utils.py:1827]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')

I0422 13:21:59.653855 138632849213248 train.py:157] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0422 13:21:59.653946 138632849213248 train.py:157] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0422 13:21:59.669415 138632849213248 train.py:164] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0422 13:21:59.669476 138632849213248 train.py:164] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0422 13:22:10.718259 138632849213248 max_utils.py:791] Total memory size: 1.3 GB, Output size: 0.1 GB, Temp size: 1.1 GB, Argument size: 0.1 GB, Host temp size: 0.0 GB.
I0422 13:22:10.719159 138632849213248 metric_logger.py:301] number parameters: 1.104 billion
I0422 13:22:21.926713 138632849213248 checkpointing.py:794] Waiting for step 0 to finish before checkpoint...
I0422 13:22:22.340452 138632849213248 checkpointing.py:798] Waited 0.41371870040893555 seconds for step 0 to finish before starting checkpointing.
I0422 13:22:22.343267 138632849213248 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0422 13:22:22.345020 138632849213248 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 0
I0422 13:22:22.346407 138632849213248 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/linen_xpk_feat_nnx_post_train_fixes_20260422_123906_11_optimizer_offload_true/checkpoints/0.
I0422 13:22:22.954257 138632849213248 signaling_client.py:364] Using JaxDistributedSignalingClient
I0422 13:22:22.955193 138632849213248 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0422 13:22:22.955257 138632849213248 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
I0422 13:22:23.229229 138632849213248 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.275050s
I0422 13:22:23.229408 138632849213248 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.485 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28122448921203613 s) (per-host)
I0422 13:22:23.229458 138632849213248 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.281284s (batch_requests_ready=0.002197s, total_serialization_initiated=0.279020s, others=0.000067s)
I0422 13:22:23.229553 138632849213248 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.285535s (all_items=0.000018s, per_item={'items': '0.00001788'}, temp_paths=0.285517)
I0422 13:22:23.230328 138632849213248 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.89 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/linen_xpk_feat_nnx_post_train_fixes_20260422_123906_11_optimizer_offload_true/checkpoints/0.
I0422 13:22:23.230671 138501144176384 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-22 13:42:23.230633
I0422 13:22:23.244050 138632849213248 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0422 13:22:23.244328 138500308526848 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0422 13:22:23.244482 138632849213248 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/linen_xpk_feat_nnx_post_train_fixes_20260422_123906_11_optimizer_offload_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776864142.3432481, 'wait_for_prev_duration_secs': 6.0558319091796875e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776864142.3450577, 'checkpointer_blocking_duration_secs': 0.885772705078125, 'get_old_steps_start_time': 1776864143.230855, 'get_old_steps_duration_secs': 2.9325485229492188e-05, 'checkpoint_manager_blocking_start_time': 1776864142.3409905, 'checkpoint_manager_blocking_duration_secs': 0.9034521579742432}
I0422 13:22:23.244586 138632849213248 checkpointing.py:409] Started an asynchronous checkpoint save for step 0
I0422 13:22:23.244637 138632849213248 max_utils.py:750] 
Memstats: After params initialized:
I0422 13:22:23.244685 138632849213248 max_utils.py:756] 	Using (GB) 0.17 / 31.25 (0.544000%) on TPU_24(process=6,(0,6,0,0))
I0422 13:22:23.244718 138632849213248 max_utils.py:756] 	Using (GB) 0.17 / 31.25 (0.544000%) on TPU_25(process=6,(1,6,0,0))
I0422 13:22:23.244744 138632849213248 max_utils.py:756] 	Using (GB) 0.17 / 31.25 (0.544000%) on TPU_28(process=6,(0,7,0,0))
I0422 13:22:23.244768 138632849213248 max_utils.py:756] 	Using (GB) 0.17 / 31.25 (0.544000%) on TPU_29(process=6,(1,7,0,0))
I0422 13:22:23.557372 138632849213248 metric_logger.py:196] completed step: 0, seconds: 11.207, TFLOP/s/device: 1.212, Tokens/s/device: 182.736, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0422 13:22:23.743063 138632849213248 metric_logger.py:196] completed step: 1, seconds: 1.629, TFLOP/s/device: 8.340, Tokens/s/device: 1257.031, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0422 13:22:24.158081 138632849213248 metric_logger.py:196] completed step: 2, seconds: 0.023, TFLOP/s/device: 597.394, Tokens/s/device: 90045.726, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28637.129
I0422 13:22:24.321003 138632849213248 metric_logger.py:196] completed step: 3, seconds: 0.415, TFLOP/s/device: 32.734, Tokens/s/device: 4934.072, total_weights: 65536, loss: 9.734, lm_loss: 9.734, perplexity: 16889.047
I0422 13:22:24.646977 138632849213248 metric_logger.py:196] completed step: 4, seconds: 0.169, TFLOP/s/device: 80.471, Tokens/s/device: 12129.468, total_weights: 65536, loss: 9.278, lm_loss: 9.278, perplexity: 10694.968
I0422 13:22:24.653110 138632849213248 metric_logger.py:196] completed step: 5, seconds: 0.163, TFLOP/s/device: 83.426, Tokens/s/device: 12574.832, total_weights: 65536, loss: 8.892, lm_loss: 8.892, perplexity: 7270.520
I0422 13:22:26.324601    2760 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0422 13:22:28.359794 138500565341952 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/linen_xpk_feat_nnx_post_train_fixes_20260422_123906_11_optimizer_offload_true/checkpoints/0/items/array_metadatas/process_6
I0422 13:22:46.897498 138632849213248 metric_logger.py:196] completed step: 6, seconds: 0.327, TFLOP/s/device: 41.602, Tokens/s/device: 6270.687, total_weights: 65536, loss: 8.592, lm_loss: 8.592, perplexity: 5390.688
I0422 13:22:47.060196 138632849213248 metric_logger.py:196] completed step: 7, seconds: 22.082, TFLOP/s/device: 0.615, Tokens/s/device: 92.744, total_weights: 65536, loss: 8.384, lm_loss: 8.384, perplexity: 4377.010
I0422 13:22:47.222949 138632849213248 metric_logger.py:196] completed step: 8, seconds: 0.168, TFLOP/s/device: 81.081, Tokens/s/device: 12221.393, total_weights: 65536, loss: 8.255, lm_loss: 8.255, perplexity: 3845.943
I0422 13:22:47.385077 138632849213248 checkpointing.py:794] Waiting for step 9 to finish before checkpoint...
I0422 13:22:47.385762 138632849213248 checkpointing.py:798] Waited 0.000705718994140625 seconds for step 9 to finish before starting checkpointing.
I0422 13:22:47.387775 138632849213248 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0422 13:23:01.188066 138501144176384 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 41.306 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 38.23984241485596 s) (per-host)
I0422 13:23:01.188212 138501144176384 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 37.957428s.
I0422 13:23:08.661944 138501144176384 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 45.431142s.
I0422 13:23:08.662257 138500308526848 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0422 13:23:08.662374 138500308526848 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0422 13:23:08.662425 138500308526848 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0422 13:23:08.663863 138500308526848 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0422 13:23:08.664029 138632849213248 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.
W0422 13:23:08.664233 138632849213248 checkpoint_manager.py:1452] Waiting for previous save to complete took 21.276457 seconds. If this number is high, consider checkpointing less frequently.
I0422 13:23:08.666029 138632849213248 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 9
I0422 13:23:08.668004 138632849213248 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/linen_xpk_feat_nnx_post_train_fixes_20260422_123906_11_optimizer_offload_true/checkpoints/9.
I0422 13:23:09.391169 138632849213248 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0422 13:23:09.391265 138632849213248 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
I0422 13:23:09.423934 138632849213248 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.034534s
I0422 13:23:09.424087 138632849213248 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 40.745 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.0378572940826416 s) (per-host)
I0422 13:23:09.424156 138632849213248 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.037935s (batch_requests_ready=0.001760s, total_serialization_initiated=0.036090s, others=0.000084s)
I0422 13:23:09.424240 138632849213248 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.042170s (all_items=0.000017s, per_item={'items': '0.00001669'}, temp_paths=0.042153)
I0422 13:23:09.424930 138632849213248 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.76 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/linen_xpk_feat_nnx_post_train_fixes_20260422_123906_11_optimizer_offload_true/checkpoints/9.
I0422 13:23:09.425272 138500308526848 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-22 13:43:09.425235
I0422 13:23:09.427281 138632849213248 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0422 13:23:09.427568 138478234875648 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save.
I0422 13:23:09.427731 138632849213248 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/linen_xpk_feat_nnx_post_train_fixes_20260422_123906_11_optimizer_offload_true/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776864167.3877454, 'wait_for_prev_duration_secs': 21.27645707130432, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776864188.6660688, 'checkpointer_blocking_duration_secs': 0.7593557834625244, 'get_old_steps_start_time': 1776864189.4254477, 'get_old_steps_duration_secs': 3.409385681152344e-05, 'checkpoint_manager_blocking_start_time': 1776864167.3859897, 'checkpoint_manager_blocking_duration_secs': 22.041704893112183}
I0422 13:23:09.427837 138632849213248 checkpointing.py:409] Started an asynchronous checkpoint save for step 9
I0422 13:23:09.427879 138632849213248 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0422 13:23:15.041054 138500565341952 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260422_123906/linen_xpk_feat_nnx_post_train_fixes_20260422_123906_11_optimizer_offload_true/checkpoints/9/items/array_metadatas/process_6
I0422 13:23:52.433148 138500308526848 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 36.693 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 43.04685831069946 s) (per-host)
I0422 13:23:52.433275 138500308526848 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 43.007885s.
I0422 13:23:59.598591 138500308526848 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 50.173169s.
I0422 13:23:59.598886 138478234875648 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save.
I0422 13:23:59.599004 138478234875648 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save.
I0422 13:23:59.599050 138478234875648 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0422 13:23:59.602463 138478234875648 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0422 13:23:59.602659 138632849213248 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.
I0422 13:23:59.602806 138632849213248 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0422 13:23:59.603831 138632849213248 metric_logger.py:196] completed step: 9, seconds: 0.162, TFLOP/s/device: 83.669, Tokens/s/device: 12611.459, total_weights: 65536, loss: 8.179, lm_loss: 8.179, perplexity: 3564.739
Per train step:
 Total TFLOPs: 13.59 
 split as 93.93% learnable weight flops and 6.07% attention flops
XPK End: Wed Apr 22 13:24:10 UTC 2026
EXIT_CODE=0