XPK Start: Tue Apr 21 14:52:46 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 14:53:11.379066: 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 14:53:11.589591 137797891970880 max_utils.py:273] Attempting to initialize the jax distributed system...
I0421 14:53:20.630907 137797891970880 distributed.py:149] Starting JAX distributed service on [::]:8482
I0421 14:53:20.633226 137797891970880 distributed.py:172] Connecting to JAX distributed service on mt-04-int8-w4fk2-slice-job-0-0.mt-04-int8-w4fk2:8482
I0421 14:53:22.692940 137797891970880 max_utils.py:284] Jax distributed system initialized!
I0421 14:53:28.806946 137797891970880 max_utils.py:800] System Information: Jax Version: 0.9.2
I0421 14:53:28.807051 137797891970880 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0421 14:53:28.807092 137797891970880 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 14:53:28.807127 137797891970880 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0421 14:53:29.501515 137797891970880 maxtext_utils.py:1565] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0421 14:53:29.501922 137797891970880 checkpointing.py:677] Setting up checkpoint logger...
I0421 14:53:29.501979 137797891970880 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0421 14:53:29.502023 137797891970880 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0421 14:53:29.502359 137797891970880 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 0x7d52f171c380>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0421 14:53:32.326038 137797891970880 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0421 14:53:32.326290 137797891970880 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 0x7d3e98099be0>}, handler_registry=None
I0421 14:53:32.326529 137797891970880 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d3e98099be0>` 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 14:53:32.326579 137797891970880 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d3e9809ce00>` 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 14:53:32.326614 137797891970880 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 0x7d3e98099be0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d3e98099be0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d3e9809ce00>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d3e9809ce00>}).
I0421 14:53:32.327248 137797891970880 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0421 14:53:32.327365 137797891970880 async_checkpointer.py:192] [process=4][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7d3e684654e0> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0421 14:53:33.497228 137797891970880 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_04_int8/checkpoints
I0421 14:53:33.925933 137797891970880 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_04_int8/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7d3e9809b530>
I0421 14:53:33.926103 137797891970880 checkpointing.py:301] Checkpoint manager created!
I0421 14:53:35.083976 137797891970880 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0421 14:53:35.084094 137797891970880 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0421 14:53:35.484359 137797891970880 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0421 14:53:35.484456 137797891970880 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0421 14:53:35.501120 137797891970880 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0421 14:53:35.501183 137797891970880 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0421 14:53:35.567841 137797891970880 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 14:53:35.567929 137797891970880 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 14:53:35.584658 137797891970880 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 14:53:35.584720 137797891970880 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 14:53:35.601407 137797891970880 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 14:53:35.601469 137797891970880 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 14:53:35.626219 137797891970880 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0421 14:53:35.626300 137797891970880 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 14:53:35.698916 137797891970880 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0421 14:53:35.699022 137797891970880 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0421 14:53:36.206502 137797891970880 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0421 14:53:36.206616 137797891970880 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0421 14:53:38.675297 137797891970880 maxtext_utils.py:1668] params/params/decoder/decoder_norm/scale
Shape: float32[2048]
Logical: P('norm',)
Physical: (None,)
I0421 14:53:38.675425 137797891970880 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 14:53:38.675478 137797891970880 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 14:53:38.675543 137797891970880 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 14:53:38.675598 137797891970880 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 14:53:38.675651 137797891970880 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 14:53:38.675710 137797891970880 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 14:53:38.675765 137797891970880 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 14:53:38.675806 137797891970880 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 14:53:38.675843 137797891970880 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 14:53:38.675889 137797891970880 maxtext_utils.py:1668] params/params/decoder/logits_dense/kernel
Shape: float32[2048,32000]
Logical: P('embed_vocab', 'vocab')
Physical: ('fsdp', None)
I0421 14:53:38.675935 137797891970880 maxtext_utils.py:1668] params/params/token_embedder/embedding
Shape: float32[32000,2048]
Logical: P('vocab', 'embed_vocab')
Physical: (None, 'fsdp')
I0421 14:53:40.062779 137797891970880 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0421 14:53:40.062877 137797891970880 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0421 14:53:40.079661 137797891970880 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0421 14:53:40.079724 137797891970880 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0421 14:53:53.188770 137797891970880 max_utils.py:791] Total memory size: 1.8 GB, Output size: 0.4 GB, Temp size: 1.4 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB.
I0421 14:53:53.189664 137797891970880 metric_logger.py:301] number parameters: 1.104 billion
I0421 14:54:07.984682 137797891970880 checkpointing.py:772] Waiting for step 0 to finish before checkpoint...
I0421 14:54:08.225814 137797891970880 checkpointing.py:776] Waited 0.24112963676452637 seconds for step 0 to finish before starting checkpointing.
I0421 14:54:08.231919 137797891970880 checkpoint_manager.py:2009] [process=4][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0421 14:54:08.233317 137797891970880 checkpoint_manager.py:1512] [process=4] Saving checkpoint at step 0
I0421 14:54:08.234736 137797891970880 event_tracking.py:70] [process=4] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_04_int8/checkpoints/0.
I0421 14:54:08.981797 137797891970880 signaling_client.py:364] Using JaxDistributedSignalingClient
I0421 14:54:08.983132 137797891970880 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0421 14:54:08.983190 137797891970880 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 14:54:09.261792 137797891970880 base_pytree_checkpoint_handler.py:154] [process=4][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.280062s
I0421 14:54:09.262007 137797891970880 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/blocking_gbytes_per_sec: 5.401 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2855868339538574 s) (per-host)
I0421 14:54:09.262077 137797891970880 base_pytree_checkpoint_handler.py:768] [process=4][thread=MainThread] Initiated Pytree async_save. Time taken: 0.285672s (batch_requests_ready=0.002270s, total_serialization_initiated=0.283305s, others=0.000098s)
I0421 14:54:09.262175 137797891970880 composite_checkpoint_handler.py:715] [process=4][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.289974s (all_items=0.000019s, per_item={'items': '0.00001860'}, temp_paths=0.289956)
I0421 14:54:09.263066 137797891970880 event_tracking.py:125] [process=4] [async] Finished blocking save in 1.03 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_04_int8/checkpoints/0.
I0421 14:54:09.263515 137661774878464 async_checkpointer.py:76] [process=4][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-21 15:14:09.263477
I0421 14:54:09.272939 137797891970880 checkpoint_manager.py:1560] [process=4][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0421 14:54:09.273201 137664854013696 async_checkpointer.py:280] [process=4][thread=save_finalize] Waiting for background save thread=async_save.
I0421 14:54:09.273334 137797891970880 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_04_int8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776783248.2319005, 'wait_for_prev_duration_secs': 6.508827209472656e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776783248.233356, 'checkpointer_blocking_duration_secs': 1.0303313732147217, 'get_old_steps_start_time': 1776783249.263714, 'get_old_steps_duration_secs': 3.3855438232421875e-05, 'checkpoint_manager_blocking_start_time': 1776783248.22636, 'checkpoint_manager_blocking_duration_secs': 1.0469348430633545}
I0421 14:54:09.273446 137797891970880 checkpointing.py:408] Started an asynchronous checkpoint save for step 0
I0421 14:54:09.273501 137797891970880 max_utils.py:750]
Memstats: After params initialized:
I0421 14:54:09.273550 137797891970880 max_utils.py:756] Using (GB) 0.44 / 31.25 (1.408000%) on TPU_16(process=4,(0,4,0,0))
I0421 14:54:09.273581 137797891970880 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_17(process=4,(1,4,0,0))
I0421 14:54:09.273607 137797891970880 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_20(process=4,(0,5,0,0))
I0421 14:54:09.273632 137797891970880 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_21(process=4,(1,5,0,0))
I0421 14:54:09.604576 137797891970880 metric_logger.py:196] completed step: 0, seconds: 14.795, TFLOP/s/device: 0.918, Tokens/s/device: 138.426, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52796.277
I0421 14:54:09.850258 137797891970880 metric_logger.py:196] completed step: 1, seconds: 1.618, TFLOP/s/device: 8.396, Tokens/s/device: 1265.534, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52796.277
I0421 14:54:10.276551 137797891970880 metric_logger.py:196] completed step: 2, seconds: 0.017, TFLOP/s/device: 802.547, Tokens/s/device: 120968.695, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28634.820
I0421 14:54:10.507360 137797891970880 metric_logger.py:196] completed step: 3, seconds: 0.426, TFLOP/s/device: 31.862, Tokens/s/device: 4802.641, total_weights: 65536, loss: 9.731, lm_loss: 9.731, perplexity: 16827.199
I0421 14:54:10.966753 137797891970880 metric_logger.py:196] completed step: 4, seconds: 0.235, TFLOP/s/device: 57.766, Tokens/s/device: 8707.113, total_weights: 65536, loss: 9.272, lm_loss: 9.272, perplexity: 10638.531
I0421 14:54:10.973349 137797891970880 metric_logger.py:196] completed step: 5, seconds: 0.231, TFLOP/s/device: 58.920, Tokens/s/device: 8881.064, total_weights: 65536, loss: 8.887, lm_loss: 8.887, perplexity: 7233.941
I0421 14:54:12.194988 2938 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0421 14:54:14.637899 137664248198912 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_04_int8/checkpoints/0/items/array_metadatas/process_4
I0421 14:54:40.161073 137797891970880 metric_logger.py:196] completed step: 6, seconds: 0.460, TFLOP/s/device: 29.533, Tokens/s/device: 4451.593, total_weights: 65536, loss: 8.588, lm_loss: 8.588, perplexity: 5365.468
I0421 14:54:40.392048 137797891970880 metric_logger.py:196] completed step: 7, seconds: 28.960, TFLOP/s/device: 0.469, Tokens/s/device: 70.718, total_weights: 65536, loss: 8.380, lm_loss: 8.380, perplexity: 4358.779
I0421 14:54:40.621459 137797891970880 metric_logger.py:196] completed step: 8, seconds: 0.234, TFLOP/s/device: 58.111, Tokens/s/device: 8759.174, total_weights: 65536, loss: 8.251, lm_loss: 8.251, perplexity: 3831.453
I0421 14:54:40.850125 137797891970880 checkpointing.py:772] Waiting for step 9 to finish before checkpoint...
I0421 14:54:40.850859 137797891970880 checkpointing.py:776] Waited 0.00075531005859375 seconds for step 9 to finish before starting checkpointing.
I0421 14:54:40.853003 137797891970880 checkpoint_manager.py:2020] [process=4][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0421 14:54:42.651045 137661774878464 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/gbytes_per_sec: 46.908 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 33.674590826034546 s) (per-host)
I0421 14:54:42.651172 137661774878464 async_checkpointer.py:90] [process=4][thread=async_save] 3 Handler Commit operations completed. Time taken: 33.387541s.
I0421 14:54:48.216948 137661774878464 async_checkpointer.py:160] [process=4][thread=async_save] Background save thread done. Time taken: 38.953300s.
I0421 14:54:48.217252 137664854013696 async_checkpointer.py:288] [process=4][thread=save_finalize] Done with waiting for background save thread=async_save.
I0421 14:54:48.217305 137664854013696 async_checkpointer.py:298] [process=4][thread=save_finalize] No errors found in background save thread=async_save.
I0421 14:54:48.217368 137664854013696 checkpoint_manager.py:2137] [process=4][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0421 14:54:48.219696 137664854013696 checkpoint_manager.py:2146] [process=4][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0421 14:54:48.219885 137797891970880 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 14:54:48.220024 137797891970880 checkpoint_manager.py:1452] Waiting for previous save to complete took 7.367020 seconds. If this number is high, consider checkpointing less frequently.
I0421 14:54:48.222745 137797891970880 checkpoint_manager.py:1512] [process=4] Saving checkpoint at step 9
I0421 14:54:48.224895 137797891970880 event_tracking.py:70] [process=4] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_04_int8/checkpoints/9.
I0421 14:54:48.543985 137797891970880 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0421 14:54:48.544077 137797891970880 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 14:54:48.581412 137797891970880 base_pytree_checkpoint_handler.py:154] [process=4][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.039337s
I0421 14:54:48.581554 137797891970880 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/blocking_gbytes_per_sec: 36.103 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.042726993560791016 s) (per-host)
I0421 14:54:48.581610 137797891970880 base_pytree_checkpoint_handler.py:768] [process=4][thread=MainThread] Initiated Pytree async_save. Time taken: 0.042792s (batch_requests_ready=0.001763s, total_serialization_initiated=0.040958s, others=0.000070s)
I0421 14:54:48.581716 137797891970880 composite_checkpoint_handler.py:715] [process=4][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.046875s (all_items=0.000017s, per_item={'items': '0.00001669'}, temp_paths=0.046858)
I0421 14:54:48.582409 137797891970880 event_tracking.py:125] [process=4] [async] Finished blocking save in 0.36 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_04_int8/checkpoints/9.
I0421 14:54:48.582696 137664854013696 async_checkpointer.py:76] [process=4][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-21 15:14:48.582674
I0421 14:54:48.584624 137797891970880 checkpoint_manager.py:1560] [process=4][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0421 14:54:48.584915 137664248198912 async_checkpointer.py:280] [process=4][thread=save_finalize] Waiting for background save thread=async_save.
I0421 14:54:48.585080 137797891970880 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_04_int8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776783280.852972, 'wait_for_prev_duration_secs': 7.36702036857605, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776783288.222784, 'checkpointer_blocking_duration_secs': 0.3600130081176758, 'get_old_steps_start_time': 1776783288.5828204, 'get_old_steps_duration_secs': 3.0040740966796875e-05, 'checkpoint_manager_blocking_start_time': 1776783280.851088, 'checkpoint_manager_blocking_duration_secs': 7.733957767486572}
I0421 14:54:48.585191 137797891970880 checkpointing.py:408] Started an asynchronous checkpoint save for step 9
I0421 14:54:48.585236 137797891970880 checkpoint_manager.py:2020] [process=4][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0421 14:54:54.588925 137641848645376 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_04_int8/checkpoints/9/items/array_metadatas/process_4
I0421 14:55:29.979666 137664854013696 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/gbytes_per_sec: 38.117 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.44078230857849 s) (per-host)
I0421 14:55:29.979797 137664854013696 async_checkpointer.py:90] [process=4][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.397022s.
I0421 14:55:38.421252 137664854013696 async_checkpointer.py:160] [process=4][thread=async_save] Background save thread done. Time taken: 49.838462s.
I0421 14:55:38.421526 137664248198912 async_checkpointer.py:288] [process=4][thread=save_finalize] Done with waiting for background save thread=async_save.
I0421 14:55:38.421672 137664248198912 async_checkpointer.py:298] [process=4][thread=save_finalize] No errors found in background save thread=async_save.
I0421 14:55:38.421725 137664248198912 checkpoint_manager.py:2137] [process=4][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0421 14:55:38.423035 137664248198912 checkpoint_manager.py:2146] [process=4][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0421 14:55:38.423211 137797891970880 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 14:55:38.423364 137797891970880 checkpoint_manager.py:2009] [process=4][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0421 14:55:38.424304 137797891970880 metric_logger.py:196] completed step: 9, seconds: 0.231, TFLOP/s/device: 58.788, Tokens/s/device: 8861.159, total_weights: 65536, loss: 8.175, lm_loss: 8.175, perplexity: 3552.333
Per train step:
Total TFLOPs: 13.59
split as 93.93% learnable weight flops and 6.07% attention flops
XPK End: Tue Apr 21 14:55:51 UTC 2026
EXIT_CODE=0