XPK Start: Tue Apr 21 15:20:20 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 15:20:44.936463: 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 15:20:45.143956 134074394781504 max_utils.py:273] Attempting to initialize the jax distributed system...
I0421 15:20:54.185189 134074394781504 distributed.py:149] Starting JAX distributed service on [::]:8482
I0421 15:20:54.190658 134074394781504 distributed.py:172] Connecting to JAX distributed service on mt-11-optimizer-offload-kgqyb-slice-job-0-0.mt-11-optimizer-offload-kgqyb:8482
I0421 15:20:55.671004 134074394781504 max_utils.py:284] Jax distributed system initialized!
I0421 15:21:01.723051 134074394781504 max_utils.py:800] System Information: Jax Version: 0.9.2
I0421 15:21:01.723155 134074394781504 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0421 15:21:01.723196 134074394781504 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 15:21:01.723232 134074394781504 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0421 15:21:02.422216 134074394781504 maxtext_utils.py:1565] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0421 15:21:02.422487 134074394781504 checkpointing.py:677] Setting up checkpoint logger...
I0421 15:21:02.422540 134074394781504 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0421 15:21:02.422588 134074394781504 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0421 15:21:02.422935 134074394781504 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 0x79f01270a6c0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0421 15:21:05.367985 134074394781504 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0421 15:21:05.368238 134074394781504 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 0x79dc7c639340>}, handler_registry=None
I0421 15:21:05.368604 134074394781504 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x79dc7c639340>` 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 15:21:05.368674 134074394781504 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x79dc7c63cd70>` 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 15:21:05.368720 134074394781504 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 0x79dc7c639340>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x79dc7c639340>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x79dc7c63cd70>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x79dc7c63cd70>}).
I0421 15:21:05.369049 134074394781504 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0421 15:21:05.369118 134074394781504 async_checkpointer.py:192] [process=4][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x79dc7c3b1440> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0421 15:21:06.532704 134074394781504 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_11_optimizer_offload_false/checkpoints
I0421 15:21:06.543247 134074394781504 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_11_optimizer_offload_false/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x79dc7c638500>
I0421 15:21:06.543369 134074394781504 checkpointing.py:301] Checkpoint manager created!
I0421 15:21:07.460573 134074394781504 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0421 15:21:07.460707 134074394781504 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0421 15:21:07.842994 134074394781504 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0421 15:21:07.843086 134074394781504 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0421 15:21:07.859799 134074394781504 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0421 15:21:07.859858 134074394781504 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0421 15:21:07.883889 134074394781504 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 15:21:07.883957 134074394781504 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 15:21:07.900732 134074394781504 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 15:21:07.900794 134074394781504 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 15:21:07.917481 134074394781504 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 15:21:07.917547 134074394781504 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 15:21:07.942524 134074394781504 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0421 15:21:07.942593 134074394781504 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0421 15:21:07.963686 134074394781504 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0421 15:21:07.963751 134074394781504 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0421 15:21:08.173257 134074394781504 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0421 15:21:08.173371 134074394781504 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0421 15:21:09.590162 134074394781504 maxtext_utils.py:1668] params/params/decoder/decoder_norm/scale
Shape: float32[2048]
Logical: P('norm',)
Physical: (None,)
I0421 15:21:09.590324 134074394781504 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 15:21:09.590403 134074394781504 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 15:21:09.590503 134074394781504 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 15:21:09.590600 134074394781504 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 15:21:09.590688 134074394781504 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 15:21:09.590790 134074394781504 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 15:21:09.590883 134074394781504 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 15:21:09.590962 134074394781504 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 15:21:09.591035 134074394781504 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 15:21:09.591127 134074394781504 maxtext_utils.py:1668] params/params/decoder/logits_dense/kernel
Shape: float32[2048,32000]
Logical: P('embed_vocab', 'vocab')
Physical: ('fsdp', None)
I0421 15:21:09.591221 134074394781504 maxtext_utils.py:1668] params/params/token_embedder/embedding
Shape: float32[32000,2048]
Logical: P('vocab', 'embed_vocab')
Physical: (None, 'fsdp')
I0421 15:21:10.083127 134074394781504 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0421 15:21:10.083223 134074394781504 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0421 15:21:10.098837 134074394781504 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0421 15:21:10.098901 134074394781504 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0421 15:21:21.100997 134074394781504 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 15:21:21.101827 134074394781504 metric_logger.py:301] number parameters: 1.104 billion
I0421 15:21:32.664413 134074394781504 checkpointing.py:772] Waiting for step 0 to finish before checkpoint...
I0421 15:21:32.820131 134074394781504 checkpointing.py:776] Waited 0.15569853782653809 seconds for step 0 to finish before starting checkpointing.
I0421 15:21:32.822782 134074394781504 checkpoint_manager.py:2009] [process=4][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0421 15:21:32.824612 134074394781504 checkpoint_manager.py:1512] [process=4] Saving checkpoint at step 0
I0421 15:21:32.826038 134074394781504 event_tracking.py:70] [process=4] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_11_optimizer_offload_false/checkpoints/0.
I0421 15:21:33.161454 134074394781504 signaling_client.py:364] Using JaxDistributedSignalingClient
I0421 15:21:33.162392 134074394781504 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0421 15:21:33.162448 134074394781504 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 15:21:33.435076 134074394781504 base_pytree_checkpoint_handler.py:154] [process=4][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.273695s
I0421 15:21:33.435247 134074394781504 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/blocking_gbytes_per_sec: 5.523 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.27930188179016113 s) (per-host)
I0421 15:21:33.435299 134074394781504 base_pytree_checkpoint_handler.py:768] [process=4][thread=MainThread] Initiated Pytree async_save. Time taken: 0.279365s (batch_requests_ready=0.002341s, total_serialization_initiated=0.276952s, others=0.000072s)
I0421 15:21:33.435394 134074394781504 composite_checkpoint_handler.py:715] [process=4][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.283588s (all_items=0.000017s, per_item={'items': '0.00001693'}, temp_paths=0.283571)
I0421 15:21:33.436237 134074394781504 event_tracking.py:125] [process=4] [async] Finished blocking save in 0.61 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_11_optimizer_offload_false/checkpoints/0.
I0421 15:21:33.436534 133948864710400 async_checkpointer.py:76] [process=4][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-21 15:41:33.436500
I0421 15:21:33.445943 134074394781504 checkpoint_manager.py:1560] [process=4][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0421 15:21:33.446187 133946138425088 async_checkpointer.py:280] [process=4][thread=save_finalize] Waiting for background save thread=async_save.
I0421 15:21:33.446324 134074394781504 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_11_optimizer_offload_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776784892.8227646, 'wait_for_prev_duration_secs': 6.151199340820312e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776784892.8246636, 'checkpointer_blocking_duration_secs': 0.6119720935821533, 'get_old_steps_start_time': 1776784893.4366739, 'get_old_steps_duration_secs': 2.9087066650390625e-05, 'checkpoint_manager_blocking_start_time': 1776784892.8207252, 'checkpoint_manager_blocking_duration_secs': 0.6255602836608887}
I0421 15:21:33.446429 134074394781504 checkpointing.py:408] Started an asynchronous checkpoint save for step 0
I0421 15:21:33.446480 134074394781504 max_utils.py:750]
Memstats: After params initialized:
I0421 15:21:33.446528 134074394781504 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_16(process=4,(0,4,0,0))
I0421 15:21:33.446560 134074394781504 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_17(process=4,(1,4,0,0))
I0421 15:21:33.446594 134074394781504 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_20(process=4,(0,5,0,0))
I0421 15:21:33.446621 134074394781504 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_21(process=4,(1,5,0,0))
I0421 15:21:33.754542 134074394781504 metric_logger.py:196] completed step: 0, seconds: 11.562, TFLOP/s/device: 1.175, Tokens/s/device: 177.125, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0421 15:21:33.946089 134074394781504 metric_logger.py:196] completed step: 1, seconds: 1.088, TFLOP/s/device: 12.482, Tokens/s/device: 1881.495, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0421 15:21:34.344762 134074394781504 metric_logger.py:196] completed step: 2, seconds: 0.044, TFLOP/s/device: 306.846, Tokens/s/device: 46251.129, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28637.129
I0421 15:21:34.492164 134074394781504 metric_logger.py:196] completed step: 3, seconds: 0.399, TFLOP/s/device: 34.044, Tokens/s/device: 5131.469, total_weights: 65536, loss: 9.734, lm_loss: 9.734, perplexity: 16889.203
I0421 15:21:34.787228 134074394781504 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.600, Tokens/s/device: 13354.809, total_weights: 65536, loss: 9.277, lm_loss: 9.277, perplexity: 10694.614
I0421 15:21:34.793287 134074394781504 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.399, Tokens/s/device: 13927.330, total_weights: 65536, loss: 8.892, lm_loss: 8.892, perplexity: 7270.717
I0421 15:21:36.497857 2768 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0421 15:21:38.942173 133947153794816 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_11_optimizer_offload_false/checkpoints/0/items/array_metadatas/process_4
I0421 15:21:56.664584 134074394781504 metric_logger.py:196] completed step: 6, seconds: 0.296, TFLOP/s/device: 45.975, Tokens/s/device: 6929.923, total_weights: 65536, loss: 8.592, lm_loss: 8.592, perplexity: 5390.759
I0421 15:21:56.812059 134074394781504 metric_logger.py:196] completed step: 7, seconds: 21.725, TFLOP/s/device: 0.625, Tokens/s/device: 94.271, total_weights: 65536, loss: 8.384, lm_loss: 8.384, perplexity: 4376.905
I0421 15:21:56.959407 134074394781504 metric_logger.py:196] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.232, Tokens/s/device: 13450.058, total_weights: 65536, loss: 8.255, lm_loss: 8.255, perplexity: 3846.406
I0421 15:21:57.106164 134074394781504 checkpointing.py:772] Waiting for step 9 to finish before checkpoint...
I0421 15:21:57.106892 134074394781504 checkpointing.py:776] Waited 0.0007503032684326172 seconds for step 9 to finish before starting checkpointing.
I0421 15:21:57.109045 134074394781504 checkpoint_manager.py:2020] [process=4][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0421 15:22:10.314837 133948864710400 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/gbytes_per_sec: 42.509 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 37.1588659286499 s) (per-host)
I0421 15:22:10.314944 133948864710400 async_checkpointer.py:90] [process=4][thread=async_save] 3 Handler Commit operations completed. Time taken: 36.877768s.
I0421 15:22:25.821565 133948864710400 async_checkpointer.py:160] [process=4][thread=async_save] Background save thread done. Time taken: 52.384373s.
I0421 15:22:25.821804 133946138425088 async_checkpointer.py:288] [process=4][thread=save_finalize] Done with waiting for background save thread=async_save.
I0421 15:22:25.821865 133946138425088 async_checkpointer.py:298] [process=4][thread=save_finalize] No errors found in background save thread=async_save.
I0421 15:22:25.821913 133946138425088 checkpoint_manager.py:2137] [process=4][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0421 15:22:25.823779 133946138425088 checkpoint_manager.py:2146] [process=4][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0421 15:22:25.823969 134074394781504 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 15:22:25.824111 134074394781504 checkpoint_manager.py:1452] Waiting for previous save to complete took 28.715065 seconds. If this number is high, consider checkpointing less frequently.
I0421 15:22:25.825954 134074394781504 checkpoint_manager.py:1512] [process=4] Saving checkpoint at step 9
I0421 15:22:25.828009 134074394781504 event_tracking.py:70] [process=4] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_11_optimizer_offload_false/checkpoints/9.
I0421 15:22:26.433051 134074394781504 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0421 15:22:26.433145 134074394781504 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 15:22:26.476853 134074394781504 base_pytree_checkpoint_handler.py:154] [process=4][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.044878s
I0421 15:22:26.477024 134074394781504 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/blocking_gbytes_per_sec: 31.806 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04849982261657715 s) (per-host)
I0421 15:22:26.477086 134074394781504 base_pytree_checkpoint_handler.py:768] [process=4][thread=MainThread] Initiated Pytree async_save. Time taken: 0.048570s (batch_requests_ready=0.001949s, total_serialization_initiated=0.046544s, others=0.000077s)
I0421 15:22:26.477204 134074394781504 composite_checkpoint_handler.py:715] [process=4][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.052704s (all_items=0.000016s, per_item={'items': '0.00001645'}, temp_paths=0.052687)
I0421 15:22:26.477952 134074394781504 event_tracking.py:125] [process=4] [async] Finished blocking save in 0.65 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_11_optimizer_offload_false/checkpoints/9.
I0421 15:22:26.478266 133946138425088 async_checkpointer.py:76] [process=4][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-21 15:42:26.478228
I0421 15:22:26.480280 134074394781504 checkpoint_manager.py:1560] [process=4][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0421 15:22:26.480604 133942475810560 async_checkpointer.py:280] [process=4][thread=save_finalize] Waiting for background save thread=async_save.
I0421 15:22:26.480787 134074394781504 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260421_144122/linen_xpk_main_20260421_144122_11_optimizer_offload_false/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776784917.1090152, 'wait_for_prev_duration_secs': 28.715064764022827, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776784945.825994, 'checkpointer_blocking_duration_secs': 0.652411937713623, 'get_old_steps_start_time': 1776784946.4784284, 'get_old_steps_duration_secs': 3.0994415283203125e-05, 'checkpoint_manager_blocking_start_time': 1776784917.1071227, 'checkpoint_manager_blocking_duration_secs': 29.37362837791443}
I0421 15:22:26.480899 134074394781504 checkpointing.py:408] Started an asynchronous checkpoint save for step 9
I0421 15:22:26.480946 134074394781504 checkpoint_manager.py:2020] [process=4][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0421 15:22:31.610438 133947153794816 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_11_optimizer_offload_false/checkpoints/9/items/array_metadatas/process_4
I0421 15:23:08.619509 133946138425088 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/gbytes_per_sec: 37.439 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.19094252586365 s) (per-host)
I0421 15:23:08.619629 133946138425088 async_checkpointer.py:90] [process=4][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.141250s.
I0421 15:23:17.267061 133946138425088 async_checkpointer.py:160] [process=4][thread=async_save] Background save thread done. Time taken: 50.788668s.
I0421 15:23:17.267337 133942475810560 async_checkpointer.py:288] [process=4][thread=save_finalize] Done with waiting for background save thread=async_save.
I0421 15:23:17.267467 133942475810560 async_checkpointer.py:298] [process=4][thread=save_finalize] No errors found in background save thread=async_save.
I0421 15:23:17.267515 133942475810560 checkpoint_manager.py:2137] [process=4][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0421 15:23:17.269117 133942475810560 checkpoint_manager.py:2146] [process=4][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0421 15:23:17.269310 134074394781504 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 15:23:17.269460 134074394781504 checkpoint_manager.py:2009] [process=4][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0421 15:23:17.270516 134074394781504 metric_logger.py:196] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.221, Tokens/s/device: 13900.578, 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 15:23:30 UTC 2026
EXIT_CODE=0