XPK Start: Tue Apr 21 15:18:28 UTC 2026
PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used.
`rope_parameters`'s factor field must be a float >= 1, got 40
`rope_parameters`'s beta_fast field must be a float, got 32
`rope_parameters`'s beta_slow field must be a float, got 1
DeepseekV32Config got `key=rope_scaling` in kwargs but hasn't set it as attribute. For RoPE standardization you need to set `self.rope_parameters` in model's config.
2026-04-21 15:18:53.894895: 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)
I0421 15:18:54.108191 132385014908736 max_utils.py:273] Attempting to initialize the jax distributed system...
I0421 15:19:03.149873 132385014908736 distributed.py:149] Starting JAX distributed service on [::]:8482
I0421 15:19:03.152246 132385014908736 distributed.py:172] Connecting to JAX distributed service on mt-10-shardy-false-9jo1k-slice-job-0-0.mt-10-shardy-false-9jo1k:8482
I0421 15:19:04.027122 132385014908736 max_utils.py:284] Jax distributed system initialized!
I0421 15:19:09.130039 132385014908736 max_utils.py:800] System Information: Jax Version: 0.9.2
I0421 15:19:09.130143 132385014908736 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0421 15:19:09.130184 132385014908736 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
I0421 15:19:09.130223 132385014908736 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0421 15:19:09.827784 132385014908736 maxtext_utils.py:1565] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0421 15:19:09.828061 132385014908736 checkpointing.py:677] Setting up checkpoint logger...
I0421 15:19:09.828118 132385014908736 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0421 15:19:09.828165 132385014908736 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0421 15:19:09.828513 132385014908736 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 0x7866b3518050>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0421 15:19:12.696400 132385014908736 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0421 15:19:12.696636 132385014908736 checkpoint_manager.py:708] [process=4][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7852e858c110>}, handler_registry=None
I0421 15:19:12.696892 132385014908736 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7852e858c110>` 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`.
I0421 15:19:12.696943 132385014908736 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7852e858c860>` 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`.
I0421 15:19:12.696978 132385014908736 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 0x7852e858c110>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7852e858c110>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7852e858c860>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7852e858c860>}).
I0421 15:19:12.697296 132385014908736 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0421 15:19:12.697375 132385014908736 async_checkpointer.py:192] [process=4][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7852e81e5580> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0421 15:19:14.164834 132385014908736 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_10_shardy_false/checkpoints
I0421 15:19:14.183555 132385014908736 checkpoint_manager.py:929] [process=4][thread=MainThread] CheckpointManager created, primary_host=0, CheckpointManagerOptions=CheckpointManagerOptions(save_interval_steps=1, max_to_keep=None, keep_time_interval=None, keep_period=None, should_keep_fn=None, best_fn=None, best_mode='max', keep_checkpoints_without_metrics=True, step_prefix=None, step_format_fixed_length=None, step_name_format=None, create=True, cleanup_tmp_directories=False, save_on_steps=frozenset(), single_host_load_and_broadcast=False, todelete_subdir=None, todelete_full_path=None, enable_background_delete=False, read_only=False, enable_async_checkpointing=True, async_options=None, multiprocessing_options=MultiprocessingOptions(primary_host=0, active_processes=None, barrier_sync_key_prefix=None), should_save_fn=None, file_options=FileOptions(path_permission_mode=None), save_root_metadata=True, temporary_path_class=None, save_decision_policy=FixedIntervalPolicy(interval=10), preservation_policy=LatestN(n=None), prevent_write_metrics=False, enable_should_save_is_saving_in_progress_check=True, enable_per_process_directory_creation=False, lightweight_initialize=False), root_directory=gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_10_shardy_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7852e86e8bf0>
I0421 15:19:14.183683 132385014908736 checkpointing.py:301] Checkpoint manager created!
I0421 15:19:15.112088 132385014908736 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0421 15:19:15.112210 132385014908736 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0421 15:19:15.496948 132385014908736 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0421 15:19:15.497045 132385014908736 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0421 15:19:15.513883 132385014908736 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0421 15:19:15.513948 132385014908736 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0421 15:19:15.538026 132385014908736 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0421 15:19:15.538102 132385014908736 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 15:19:15.554892 132385014908736 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0421 15:19:15.554961 132385014908736 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 15:19:15.571799 132385014908736 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0421 15:19:15.571865 132385014908736 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 15:19:15.597103 132385014908736 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0421 15:19:15.597178 132385014908736 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 15:19:15.618584 132385014908736 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0421 15:19:15.618659 132385014908736 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0421 15:19:15.834450 132385014908736 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0421 15:19:15.834562 132385014908736 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0421 15:19:17.224971 132385014908736 maxtext_utils.py:1668] params/params/decoder/decoder_norm/scale
Shape: float32[2048]
Logical: P('norm',)
Physical: (None,)
I0421 15:19:17.225094 132385014908736 maxtext_utils.py:1668] params/params/decoder/layers/mlp/wi_0/kernel
Shape: float32[2048,16,7168]
Logical: P('embed', 'layers', 'mlp')
Physical: ('fsdp', None, None)
I0421 15:19:17.225147 132385014908736 maxtext_utils.py:1668] params/params/decoder/layers/mlp/wi_1/kernel
Shape: float32[2048,16,7168]
Logical: P('embed', 'layers', 'mlp')
Physical: ('fsdp', None, None)
I0421 15:19:17.225212 132385014908736 maxtext_utils.py:1668] params/params/decoder/layers/mlp/wo/kernel
Shape: float32[7168,16,2048]
Logical: P('mlp', 'layers', 'embed')
Physical: (None, None, 'fsdp')
I0421 15:19:17.225266 132385014908736 maxtext_utils.py:1668] params/params/decoder/layers/post_self_attention_layer_norm/scale
Shape: float32[2048,16]
Logical: P('norm', 'layers')
Physical: (None, None)
I0421 15:19:17.225303 132385014908736 maxtext_utils.py:1668] params/params/decoder/layers/pre_self_attention_layer_norm/scale
Shape: float32[2048,16]
Logical: P('norm', 'layers')
Physical: (None, None)
I0421 15:19:17.225359 132385014908736 maxtext_utils.py:1668] 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)
I0421 15:19:17.225412 132385014908736 maxtext_utils.py:1668] 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')
I0421 15:19:17.225453 132385014908736 maxtext_utils.py:1668] 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)
I0421 15:19:17.225489 132385014908736 maxtext_utils.py:1668] 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)
I0421 15:19:17.225538 132385014908736 maxtext_utils.py:1668] params/params/decoder/logits_dense/kernel
Shape: float32[2048,32000]
Logical: P('embed_vocab', 'vocab')
Physical: ('fsdp', None)
I0421 15:19:17.225586 132385014908736 maxtext_utils.py:1668] params/params/token_embedder/embedding
Shape: float32[32000,2048]
Logical: P('vocab', 'embed_vocab')
Physical: (None, 'fsdp')
I0421 15:19:17.725800 132385014908736 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0421 15:19:17.725896 132385014908736 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0421 15:19:17.741588 132385014908736 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0421 15:19:17.741650 132385014908736 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0421 15:19:28.731636 132385014908736 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.
I0421 15:19:28.732476 132385014908736 metric_logger.py:301] number parameters: 1.104 billion
I0421 15:19:39.995111 132385014908736 checkpointing.py:772] Waiting for step 0 to finish before checkpoint...
I0421 15:19:40.334918 132385014908736 checkpointing.py:776] Waited 0.3397839069366455 seconds for step 0 to finish before starting checkpointing.
I0421 15:19:40.338484 132385014908736 checkpoint_manager.py:2009] [process=4][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0421 15:19:40.339883 132385014908736 checkpoint_manager.py:1512] [process=4] Saving checkpoint at step 0
I0421 15:19:40.341324 132385014908736 event_tracking.py:70] [process=4] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_10_shardy_false/checkpoints/0.
I0421 15:19:40.683643 132385014908736 signaling_client.py:364] Using JaxDistributedSignalingClient
I0421 15:19:40.684542 132385014908736 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0421 15:19:40.684628 132385014908736 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
I0421 15:19:40.958814 132385014908736 base_pytree_checkpoint_handler.py:154] [process=4][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.275244s
I0421 15:19:40.958985 132385014908736 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/blocking_gbytes_per_sec: 5.490 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28096771240234375 s) (per-host)
I0421 15:19:40.959039 132385014908736 base_pytree_checkpoint_handler.py:768] [process=4][thread=MainThread] Initiated Pytree async_save. Time taken: 0.281032s (batch_requests_ready=0.002418s, total_serialization_initiated=0.278541s, others=0.000073s)
I0421 15:19:40.959131 132385014908736 composite_checkpoint_handler.py:715] [process=4][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.285319s (all_items=0.000019s, per_item={'items': '0.00001860'}, temp_paths=0.285301)
I0421 15:19:40.959991 132385014908736 event_tracking.py:125] [process=4] [async] Finished blocking save in 0.62 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_10_shardy_false/checkpoints/0.
I0421 15:19:40.960335 132259616397056 async_checkpointer.py:76] [process=4][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-21 15:39:40.960296
I0421 15:19:40.964898 132385014908736 checkpoint_manager.py:1560] [process=4][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0421 15:19:40.965157 132258014951168 async_checkpointer.py:280] [process=4][thread=save_finalize] Waiting for background save thread=async_save.
I0421 15:19:40.965311 132385014908736 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_10_shardy_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776784780.3384643, 'wait_for_prev_duration_secs': 6.318092346191406e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776784780.33992, 'checkpointer_blocking_duration_secs': 0.6205673217773438, 'get_old_steps_start_time': 1776784780.9605145, 'get_old_steps_duration_secs': 2.9087066650390625e-05, 'checkpoint_manager_blocking_start_time': 1776784780.3354228, 'checkpoint_manager_blocking_duration_secs': 0.6298503875732422}
I0421 15:19:40.965421 132385014908736 checkpointing.py:408] Started an asynchronous checkpoint save for step 0
I0421 15:19:40.965473 132385014908736 max_utils.py:750]
Memstats: After params initialized:
I0421 15:19:40.965523 132385014908736 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_16(process=4,(0,4,0,0))
I0421 15:19:40.965558 132385014908736 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_17(process=4,(1,4,0,0))
I0421 15:19:40.965583 132385014908736 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_20(process=4,(0,5,0,0))
I0421 15:19:40.965609 132385014908736 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_21(process=4,(1,5,0,0))
I0421 15:19:41.280350 132385014908736 metric_logger.py:196] completed step: 0, seconds: 11.263, TFLOP/s/device: 1.206, Tokens/s/device: 181.842, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0421 15:19:41.462053 132385014908736 metric_logger.py:196] completed step: 1, seconds: 1.284, TFLOP/s/device: 10.584, Tokens/s/device: 1595.361, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0421 15:19:41.879127 132385014908736 metric_logger.py:196] completed step: 2, seconds: 0.035, TFLOP/s/device: 393.374, Tokens/s/device: 59293.573, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28637.129
I0421 15:19:42.026324 132385014908736 metric_logger.py:196] completed step: 3, seconds: 0.417, TFLOP/s/device: 32.562, Tokens/s/device: 4908.034, total_weights: 65536, loss: 9.734, lm_loss: 9.734, perplexity: 16889.203
I0421 15:19:42.321261 132385014908736 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.858, Tokens/s/device: 13393.675, total_weights: 65536, loss: 9.277, lm_loss: 9.277, perplexity: 10694.614
I0421 15:19:42.327282 132385014908736 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.277, Tokens/s/device: 13908.980, total_weights: 65536, loss: 8.892, lm_loss: 8.892, perplexity: 7270.717
I0421 15:19:43.919130 2752 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0421 15:19:46.912366 132259031000832 array_metadata_store.py:203] [process=4][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_10_shardy_false/checkpoints/0/items/array_metadatas/process_4
I0421 15:20:04.290841 132385014908736 metric_logger.py:196] completed step: 6, seconds: 0.295, TFLOP/s/device: 45.991, Tokens/s/device: 6932.292, total_weights: 65536, loss: 8.592, lm_loss: 8.592, perplexity: 5390.759
I0421 15:20:04.438321 132385014908736 metric_logger.py:196] completed step: 7, seconds: 21.817, TFLOP/s/device: 0.623, Tokens/s/device: 93.872, total_weights: 65536, loss: 8.384, lm_loss: 8.384, perplexity: 4376.905
I0421 15:20:04.585477 132385014908736 metric_logger.py:196] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.269, Tokens/s/device: 13455.625, total_weights: 65536, loss: 8.255, lm_loss: 8.255, perplexity: 3846.406
I0421 15:20:04.732261 132385014908736 checkpointing.py:772] Waiting for step 9 to finish before checkpoint...
I0421 15:20:04.732938 132385014908736 checkpointing.py:776] Waited 0.0006945133209228516 seconds for step 9 to finish before starting checkpointing.
I0421 15:20:04.735140 132385014908736 checkpoint_manager.py:2020] [process=4][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0421 15:20:17.695077 132259616397056 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/gbytes_per_sec: 42.672 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 37.017019748687744 s) (per-host)
I0421 15:20:17.695203 132259616397056 async_checkpointer.py:90] [process=4][thread=async_save] 3 Handler Commit operations completed. Time taken: 36.734753s.
I0421 15:20:26.667480 132259616397056 async_checkpointer.py:160] [process=4][thread=async_save] Background save thread done. Time taken: 45.707014s.
I0421 15:20:26.667808 132258014951168 async_checkpointer.py:288] [process=4][thread=save_finalize] Done with waiting for background save thread=async_save.
I0421 15:20:26.667926 132258014951168 async_checkpointer.py:298] [process=4][thread=save_finalize] No errors found in background save thread=async_save.
I0421 15:20:26.667981 132258014951168 checkpoint_manager.py:2137] [process=4][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0421 15:20:26.669439 132258014951168 checkpoint_manager.py:2146] [process=4][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0421 15:20:26.669635 132385014908736 checkpoint_manager.py:2032] [process=4][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0421 15:20:26.669789 132385014908736 checkpoint_manager.py:1452] Waiting for previous save to complete took 21.934646 seconds. If this number is high, consider checkpointing less frequently.
I0421 15:20:26.671554 132385014908736 checkpoint_manager.py:1512] [process=4] Saving checkpoint at step 9
I0421 15:20:26.673672 132385014908736 event_tracking.py:70] [process=4] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_10_shardy_false/checkpoints/9.
I0421 15:20:26.969826 132385014908736 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0421 15:20:26.969921 132385014908736 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
I0421 15:20:27.005109 132385014908736 base_pytree_checkpoint_handler.py:154] [process=4][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.036369s
I0421 15:20:27.005275 132385014908736 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/blocking_gbytes_per_sec: 38.537 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04002881050109863 s) (per-host)
I0421 15:20:27.005327 132385014908736 base_pytree_checkpoint_handler.py:768] [process=4][thread=MainThread] Initiated Pytree async_save. Time taken: 0.040089s (batch_requests_ready=0.001973s, total_serialization_initiated=0.038049s, others=0.000068s)
I0421 15:20:27.005416 132385014908736 composite_checkpoint_handler.py:715] [process=4][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.044217s (all_items=0.000015s, per_item={'items': '0.00001478'}, temp_paths=0.044203)
I0421 15:20:27.006056 132385014908736 event_tracking.py:125] [process=4] [async] Finished blocking save in 0.33 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_10_shardy_false/checkpoints/9.
I0421 15:20:27.006386 132258014951168 async_checkpointer.py:76] [process=4][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-21 15:40:27.006350
I0421 15:20:27.008390 132385014908736 checkpoint_manager.py:1560] [process=4][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0421 15:20:27.008665 132259031000832 async_checkpointer.py:280] [process=4][thread=save_finalize] Waiting for background save thread=async_save.
I0421 15:20:27.008839 132385014908736 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_10_shardy_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776784804.7351096, 'wait_for_prev_duration_secs': 21.934646368026733, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776784826.6715941, 'checkpointer_blocking_duration_secs': 0.33489441871643066, 'get_old_steps_start_time': 1776784827.0065114, 'get_old_steps_duration_secs': 3.0279159545898438e-05, 'checkpoint_manager_blocking_start_time': 1776784804.7331817, 'checkpoint_manager_blocking_duration_secs': 22.275622606277466}
I0421 15:20:27.008952 132385014908736 checkpointing.py:408] Started an asynchronous checkpoint save for step 9
I0421 15:20:27.008996 132385014908736 checkpoint_manager.py:2020] [process=4][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0421 15:20:32.132785 132231464986368 array_metadata_store.py:203] [process=4][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_10_shardy_false/checkpoints/9/items/array_metadatas/process_4
I0421 15:21:08.602691 132258014951168 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/gbytes_per_sec: 37.937 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.63740515708923 s) (per-host)
I0421 15:21:08.602827 132258014951168 async_checkpointer.py:90] [process=4][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.595806s.
I0421 15:21:16.843263 132258014951168 async_checkpointer.py:160] [process=4][thread=async_save] Background save thread done. Time taken: 49.836227s.
I0421 15:21:16.843558 132259031000832 async_checkpointer.py:288] [process=4][thread=save_finalize] Done with waiting for background save thread=async_save.
I0421 15:21:16.843676 132259031000832 async_checkpointer.py:298] [process=4][thread=save_finalize] No errors found in background save thread=async_save.
I0421 15:21:16.843755 132259031000832 checkpoint_manager.py:2137] [process=4][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0421 15:21:16.845156 132259031000832 checkpoint_manager.py:2146] [process=4][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0421 15:21:16.845341 132385014908736 checkpoint_manager.py:2032] [process=4][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0421 15:21:16.845491 132385014908736 checkpoint_manager.py:2009] [process=4][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0421 15:21:16.846364 132385014908736 metric_logger.py:196] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.124, Tokens/s/device: 13885.875, 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: Tue Apr 21 15:21:29 UTC 2026
EXIT_CODE=0