XPK Start: Wed Apr 22 12:50:23 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.
2026-04-22 12:50:48.526211: 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 12:50:48.732642 133194166814528 max_utils.py:273] Attempting to initialize the jax distributed system...
I0422 12:50:57.773684 133194166814528 distributed.py:149] Starting JAX distributed service on [::]:8482
I0422 12:50:57.776007 133194166814528 distributed.py:172] Connecting to JAX distributed service on mt-04-int8-zctjs-slice-job-0-0.mt-04-int8-zctjs:8482
I0422 12:50:58.992321 133194166814528 max_utils.py:284] Jax distributed system initialized!
I0422 12:51:05.347939 133194166814528 max_utils.py:800] System Information: Jax Version: 0.9.2
I0422 12:51:05.348050 133194166814528 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0422 12:51:05.348093 133194166814528 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 12:51:05.348128 133194166814528 train_utils.py:391] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0422 12:51:06.041412 133194166814528 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0422 12:51:06.042002 133194166814528 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0422 12:51:06.042303 133194166814528 checkpointing.py:688] Setting up checkpoint logger...
I0422 12:51:06.042356 133194166814528 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True
I0422 12:51:06.042398 133194166814528 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0422 12:51:06.042740 133194166814528 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 0x792318118800>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0422 12:51:09.416418 133194166814528 checkpointing.py:266] Enabling policy for fixed interval checkpointing.
I0422 12:51:09.416673 133194166814528 checkpoint_manager.py:708] [process=5][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x790ec863e360>}, handler_registry=None
I0422 12:51:09.416908 133194166814528 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x790ec863e360>` 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 12:51:09.416975 133194166814528 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x790ec863e4e0>` 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 12:51:09.417012 133194166814528 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 0x790ec863e360>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x790ec863e360>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x790ec863e4e0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x790ec863e4e0>}).
I0422 12:51:09.417349 133194166814528 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0422 12:51:09.417419 133194166814528 async_checkpointer.py:192] [process=5][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x790ec83d5e40> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0422 12:51:10.491106 133194166814528 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_04_int8/checkpoints
I0422 12:51:10.557390 133194166814528 checkpoint_manager.py:929] [process=5][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_04_int8/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x790ec863fb00>
I0422 12:51:10.557555 133194166814528 checkpointing.py:302] Checkpoint manager created!
I0422 12:51:11.701959 133194166814528 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0422 12:51:11.702066 133194166814528 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0422 12:51:12.096251 133194166814528 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0422 12:51:12.096358 133194166814528 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0422 12:51:12.112887 133194166814528 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0422 12:51:12.112944 133194166814528 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0422 12:51:12.178255 133194166814528 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 12:51:12.178347 133194166814528 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0422 12:51:12.194733 133194166814528 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 12:51:12.194792 133194166814528 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0422 12:51:12.216723 133194166814528 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 12:51:12.216827 133194166814528 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0422 12:51:12.242121 133194166814528 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0422 12:51:12.242195 133194166814528 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0422 12:51:12.307555 133194166814528 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0422 12:51:12.307638 133194166814528 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0422 12:51:12.823006 133194166814528 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint
I0422 12:51:12.823115 133194166814528 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0422 12:51:15.272471 133194166814528 maxtext_utils.py:1880] params/params/decoder/decoder_norm/scale
Shape: float32[2048]
Logical: P('norm',)
Physical: (None,)
I0422 12:51:15.272597 133194166814528 maxtext_utils.py:1880] params/params/decoder/layers/mlp/wi_0/kernel
Shape: float32[2048,16,7168]
Logical: P('embed', 'layers', 'mlp')
Physical: ('fsdp', None, None)
I0422 12:51:15.272669 133194166814528 maxtext_utils.py:1880] params/params/decoder/layers/mlp/wi_1/kernel
Shape: float32[2048,16,7168]
Logical: P('embed', 'layers', 'mlp')
Physical: ('fsdp', None, None)
I0422 12:51:15.272757 133194166814528 maxtext_utils.py:1880] params/params/decoder/layers/mlp/wo/kernel
Shape: float32[7168,16,2048]
Logical: P('mlp', 'layers', 'embed')
Physical: (None, None, 'fsdp')
I0422 12:51:15.272827 133194166814528 maxtext_utils.py:1880] params/params/decoder/layers/post_self_attention_layer_norm/scale
Shape: float32[2048,16]
Logical: P('norm', 'layers')
Physical: (None, None)
I0422 12:51:15.272889 133194166814528 maxtext_utils.py:1880] params/params/decoder/layers/pre_self_attention_layer_norm/scale
Shape: float32[2048,16]
Logical: P('norm', 'layers')
Physical: (None, None)
I0422 12:51:15.272960 133194166814528 maxtext_utils.py:1880] 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 12:51:15.273033 133194166814528 maxtext_utils.py:1880] 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 12:51:15.273085 133194166814528 maxtext_utils.py:1880] 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 12:51:15.273133 133194166814528 maxtext_utils.py:1880] 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 12:51:15.273194 133194166814528 maxtext_utils.py:1880] params/params/decoder/logits_dense/kernel
Shape: float32[2048,32000]
Logical: P('embed_vocab', 'vocab')
Physical: ('fsdp', None)
I0422 12:51:15.273247 133194166814528 maxtext_utils.py:1880] params/params/token_embedder/embedding
Shape: float32[32000,2048]
Logical: P('vocab', 'embed_vocab')
Physical: (None, 'fsdp')
I0422 12:51:16.674005 133194166814528 train.py:157] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0422 12:51:16.674105 133194166814528 train.py:157] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0422 12:51:16.689506 133194166814528 train.py:164] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0422 12:51:16.689569 133194166814528 train.py:164] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0422 12:51:30.685475 133194166814528 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.
I0422 12:51:30.686287 133194166814528 metric_logger.py:301] number parameters: 1.104 billion
I0422 12:51:45.113431 133194166814528 checkpointing.py:794] Waiting for step 0 to finish before checkpoint...
I0422 12:51:45.356731 133194166814528 checkpointing.py:798] Waited 0.24328064918518066 seconds for step 0 to finish before starting checkpointing.
I0422 12:51:45.359234 133194166814528 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0422 12:51:45.361197 133194166814528 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 0
I0422 12:51:45.362567 133194166814528 event_tracking.py:70] [process=5] [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_04_int8/checkpoints/0.
I0422 12:51:45.772588 133194166814528 signaling_client.py:364] Using JaxDistributedSignalingClient
I0422 12:51:45.773500 133194166814528 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0422 12:51:45.773555 133194166814528 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 12:51:46.049521 133194166814528 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.277007s
I0422 12:51:46.049696 133194166814528 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 5.460 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2825305461883545 s) (per-host)
I0422 12:51:46.049752 133194166814528 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.282597s (batch_requests_ready=0.002321s, total_serialization_initiated=0.280202s, others=0.000074s)
I0422 12:51:46.049845 133194166814528 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.287220s (all_items=0.000016s, per_item={'items': '0.00001597'}, temp_paths=0.287204)
I0422 12:51:46.050698 133194166814528 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.69 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_04_int8/checkpoints/0.
I0422 12:51:46.051055 133061993928448 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-22 13:11:46.051016
I0422 12:51:46.061206 133194166814528 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0422 12:51:46.061478 133061463230208 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save.
I0422 12:51:46.061630 133194166814528 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_04_int8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776862305.359215, 'wait_for_prev_duration_secs': 6.175041198730469e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776862305.3612413, 'checkpointer_blocking_duration_secs': 0.6899769306182861, 'get_old_steps_start_time': 1776862306.0512419, 'get_old_steps_duration_secs': 3.218650817871094e-05, 'checkpoint_manager_blocking_start_time': 1776862305.3572862, 'checkpoint_manager_blocking_duration_secs': 0.7043066024780273}
I0422 12:51:46.061756 133194166814528 checkpointing.py:409] Started an asynchronous checkpoint save for step 0
I0422 12:51:46.061805 133194166814528 max_utils.py:750]
Memstats: After params initialized:
I0422 12:51:46.061853 133194166814528 max_utils.py:756] Using (GB) 0.44 / 31.25 (1.408000%) on TPU_18(process=5,(2,4,0,0))
I0422 12:51:46.061885 133194166814528 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_19(process=5,(3,4,0,0))
I0422 12:51:46.061913 133194166814528 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_22(process=5,(2,5,0,0))
I0422 12:51:46.061939 133194166814528 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_23(process=5,(3,5,0,0))
I0422 12:51:46.383316 133194166814528 metric_logger.py:196] completed step: 0, seconds: 14.427, TFLOP/s/device: 0.942, Tokens/s/device: 141.956, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52796.277
I0422 12:51:46.643260 133194166814528 metric_logger.py:196] completed step: 1, seconds: 1.268, TFLOP/s/device: 10.713, Tokens/s/device: 1614.771, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52796.277
I0422 12:51:47.066816 133194166814528 metric_logger.py:196] completed step: 2, seconds: 0.031, TFLOP/s/device: 437.617, Tokens/s/device: 65962.381, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28634.820
I0422 12:51:47.296531 133194166814528 metric_logger.py:196] completed step: 3, seconds: 0.424, TFLOP/s/device: 32.040, Tokens/s/device: 4829.482, total_weights: 65536, loss: 9.731, lm_loss: 9.731, perplexity: 16827.199
I0422 12:51:47.755840 133194166814528 metric_logger.py:196] completed step: 4, seconds: 0.235, TFLOP/s/device: 57.855, Tokens/s/device: 8720.534, total_weights: 65536, loss: 9.272, lm_loss: 9.272, perplexity: 10638.531
I0422 12:51:47.761998 133194166814528 metric_logger.py:196] completed step: 5, seconds: 0.230, TFLOP/s/device: 59.185, Tokens/s/device: 8921.026, total_weights: 65536, loss: 8.887, lm_loss: 8.887, perplexity: 7233.941
I0422 12:51:49.391613 2923 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0422 12:51:51.348740 133061471622912 array_metadata_store.py:203] [process=5][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_04_int8/checkpoints/0/items/array_metadatas/process_5
I0422 12:52:17.430011 133194166814528 metric_logger.py:196] completed step: 6, seconds: 0.460, TFLOP/s/device: 29.561, Tokens/s/device: 4455.826, total_weights: 65536, loss: 8.588, lm_loss: 8.588, perplexity: 5365.468
I0422 12:52:17.659606 133194166814528 metric_logger.py:196] completed step: 7, seconds: 29.440, TFLOP/s/device: 0.462, Tokens/s/device: 69.565, total_weights: 65536, loss: 8.380, lm_loss: 8.380, perplexity: 4358.779
I0422 12:52:17.889093 133194166814528 metric_logger.py:196] completed step: 8, seconds: 0.234, TFLOP/s/device: 58.151, Tokens/s/device: 8765.210, total_weights: 65536, loss: 8.251, lm_loss: 8.251, perplexity: 3831.453
I0422 12:52:18.119114 133194166814528 checkpointing.py:794] Waiting for step 9 to finish before checkpoint...
I0422 12:52:18.119753 133194166814528 checkpointing.py:798] Waited 0.0006611347198486328 seconds for step 9 to finish before starting checkpointing.
I0422 12:52:18.121873 133194166814528 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0422 12:52:20.023419 133061993928448 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 46.111 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 34.25619101524353 s) (per-host)
I0422 12:52:20.023543 133061993928448 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 33.972372s.
I0422 12:52:25.429252 133061993928448 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 39.378063s.
I0422 12:52:25.429547 133061463230208 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save.
I0422 12:52:25.429676 133061463230208 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save.
I0422 12:52:25.429727 133061463230208 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0422 12:52:25.431255 133061463230208 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0422 12:52:25.431441 133194166814528 checkpoint_manager.py:2032] [process=5][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0422 12:52:25.431578 133194166814528 checkpoint_manager.py:1452] Waiting for previous save to complete took 7.309704 seconds. If this number is high, consider checkpointing less frequently.
I0422 12:52:25.433495 133194166814528 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 9
I0422 12:52:25.435606 133194166814528 event_tracking.py:70] [process=5] [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_04_int8/checkpoints/9.
I0422 12:52:25.744859 133194166814528 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0422 12:52:25.744953 133194166814528 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 12:52:25.776350 133194166814528 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.033437s
I0422 12:52:25.776519 133194166814528 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 41.587 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.03709244728088379 s) (per-host)
I0422 12:52:25.776571 133194166814528 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.037155s (batch_requests_ready=0.001938s, total_serialization_initiated=0.035146s, others=0.000070s)
I0422 12:52:25.776685 133194166814528 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.041142s (all_items=0.000015s, per_item={'items': '0.00001454'}, temp_paths=0.041127)
I0422 12:52:25.777405 133194166814528 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.34 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_04_int8/checkpoints/9.
I0422 12:52:25.777783 133061463230208 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-22 13:12:25.777745
I0422 12:52:25.781672 133194166814528 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0422 12:52:25.781954 133061471622912 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save.
I0422 12:52:25.782132 133194166814528 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_04_int8/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776862338.1218424, 'wait_for_prev_duration_secs': 7.309704065322876, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776862345.4335337, 'checkpointer_blocking_duration_secs': 0.3443934917449951, 'get_old_steps_start_time': 1776862345.7779486, 'get_old_steps_duration_secs': 3.075599670410156e-05, 'checkpoint_manager_blocking_start_time': 1776862338.1199849, 'checkpoint_manager_blocking_duration_secs': 7.662106990814209}
I0422 12:52:25.782266 133194166814528 checkpointing.py:409] Started an asynchronous checkpoint save for step 9
I0422 12:52:25.782315 133194166814528 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0422 12:52:31.293172 133038495196928 array_metadata_store.py:203] [process=5][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_04_int8/checkpoints/9/items/array_metadatas/process_5
I0422 12:53:07.593601 133061463230208 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 37.741 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.854135513305664 s) (per-host)
I0422 12:53:07.593747 133061463230208 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.815847s.
I0422 12:53:14.280261 133061463230208 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 48.502347s.
I0422 12:53:14.280553 133061471622912 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save.
I0422 12:53:14.280691 133061471622912 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save.
I0422 12:53:14.280739 133061471622912 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0422 12:53:14.282923 133061471622912 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0422 12:53:14.283095 133194166814528 checkpoint_manager.py:2032] [process=5][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0422 12:53:14.283241 133194166814528 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0422 12:53:14.284205 133194166814528 metric_logger.py:196] completed step: 9, seconds: 0.229, TFLOP/s/device: 59.227, Tokens/s/device: 8927.404, 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: Wed Apr 22 12:53:23 UTC 2026
EXIT_CODE=0