MaxView

XPK Start: Sat Apr 18 20:57:22 UTC 2026
PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used.
2026-04-18 20:57:46.793549: 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)
I0418 20:57:46.970584 134577163413312 max_utils.py:273] Attempting to initialize the jax distributed system...
I0418 20:57:56.010526 134577163413312 distributed.py:149] Starting JAX distributed service on [::]:8482
I0418 20:57:56.012895 134577163413312 distributed.py:172] Connecting to JAX distributed service on mt-07-eval-shlmc-slice-job-0-0.mt-07-eval-shlmc:8482
I0418 20:57:57.362377 134577163413312 max_utils.py:284] Jax distributed system initialized!
I0418 20:58:03.635211 134577163413312 max_utils.py:800] System Information: Jax Version: 0.9.2
I0418 20:58:03.635331 134577163413312 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0418 20:58:03.635371 134577163413312 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
I0418 20:58:03.635407 134577163413312 train_utils.py:378] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0418 20:58:04.331030 134577163413312 maxtext_utils.py:1718] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0418 20:58:04.331618 134577163413312 maxtext_utils.py:1718] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0418 20:58:04.331799 134577163413312 checkpointing.py:688] Setting up checkpoint logger...
I0418 20:58:04.331848 134577163413312 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True
I0418 20:58:04.331891 134577163413312 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0418 20:58:04.332257 134577163413312 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 0x7a64f84490a0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0418 20:58:08.036462 134577163413312 checkpointing.py:266] Enabling policy for fixed interval checkpointing.
I0418 20:58:08.036643 134577163413312 checkpoint_manager.py:708] [process=3][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7a50a06499d0>}, handler_registry=None
I0418 20:58:08.036938 134577163413312 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7a50a06499d0>` 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`.
I0418 20:58:08.036989 134577163413312 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a50a064ab70>` 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`.
I0418 20:58:08.037024 134577163413312 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 0x7a50a06499d0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7a50a06499d0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a50a064ab70>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7a50a064ab70>}).
I0418 20:58:08.037365 134577163413312 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0418 20:58:08.037436 134577163413312 async_checkpointer.py:192] [process=3][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7a50a03df880> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0418 20:58:09.245551 134577163413312 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/linen_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_07_eval/checkpoints
I0418 20:58:09.720630 134577163413312 checkpoint_manager.py:929] [process=3][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_linen_converter_and_sharding_tools_20260418_204152/linen_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_07_eval/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7a50a0648e90>
I0418 20:58:09.720810 134577163413312 checkpointing.py:302] Checkpoint manager created!
I0418 20:58:10.660470 134577163413312 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0418 20:58:10.660573 134577163413312 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0418 20:58:11.036523 134577163413312 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0418 20:58:11.036612 134577163413312 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0418 20:58:11.052844 134577163413312 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0418 20:58:11.052906 134577163413312 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0418 20:58:11.076468 134577163413312 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0418 20:58:11.076536 134577163413312 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0418 20:58:11.092763 134577163413312 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0418 20:58:11.092821 134577163413312 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0418 20:58:11.109007 134577163413312 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0418 20:58:11.109069 134577163413312 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0418 20:58:11.133561 134577163413312 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0418 20:58:11.133627 134577163413312 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0418 20:58:11.154412 134577163413312 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0418 20:58:11.154475 134577163413312 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0418 20:58:11.367405 134577163413312 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint
I0418 20:58:11.367507 134577163413312 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0418 20:58:12.774327 134577163413312 maxtext_utils.py:1827]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0418 20:58:12.774448 134577163413312 maxtext_utils.py:1827]  params/params/decoder/layers/mlp/wi_0/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0418 20:58:12.774501 134577163413312 maxtext_utils.py:1827]  params/params/decoder/layers/mlp/wi_1/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0418 20:58:12.774557 134577163413312 maxtext_utils.py:1827]  params/params/decoder/layers/mlp/wo/kernel
    Shape:     float32[7168,16,2048]
    Logical:   P('mlp', 'layers', 'embed')
    Physical:  (None, None, 'fsdp')
I0418 20:58:12.774608 134577163413312 maxtext_utils.py:1827]  params/params/decoder/layers/post_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0418 20:58:12.774645 134577163413312 maxtext_utils.py:1827]  params/params/decoder/layers/pre_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0418 20:58:12.774697 134577163413312 maxtext_utils.py:1827]  params/params/decoder/layers/self_attention/key/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   P('embed', 'layers', 'kv_heads', 'kv_head_dim')
    Physical:  ('fsdp', None, None, None)
I0418 20:58:12.774748 134577163413312 maxtext_utils.py:1827]  params/params/decoder/layers/self_attention/out/kernel
    Shape:     float32[16,16,128,2048]
    Logical:   P('heads', 'layers', 'kv', 'embed')
    Physical:  (None, None, None, 'fsdp')
I0418 20:58:12.774787 134577163413312 maxtext_utils.py:1827]  params/params/decoder/layers/self_attention/query/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   P('embed', 'layers', 'q_heads', 'kv')
    Physical:  ('fsdp', None, None, None)
I0418 20:58:12.774822 134577163413312 maxtext_utils.py:1827]  params/params/decoder/layers/self_attention/value/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   P('embed', 'layers', 'kv_heads', 'kv_head_dim')
    Physical:  ('fsdp', None, None, None)
I0418 20:58:12.774870 134577163413312 maxtext_utils.py:1827]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)
I0418 20:58:12.774917 134577163413312 maxtext_utils.py:1827]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')

I0418 20:58:13.263743 134577163413312 train.py:157] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0418 20:58:13.263837 134577163413312 train.py:157] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0418 20:58:13.279215 134577163413312 train.py:164] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0418 20:58:13.279286 134577163413312 train.py:164] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0418 20:58:24.103286 134577163413312 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.
I0418 20:58:24.104048 134577163413312 metric_logger.py:301] number parameters: 1.104 billion
I0418 20:58:35.600883 134577163413312 checkpointing.py:794] Waiting for step 0 to finish before checkpoint...
I0418 20:58:35.755673 134577163413312 checkpointing.py:798] Waited 0.15477228164672852 seconds for step 0 to finish before starting checkpointing.
I0418 20:58:35.758206 134577163413312 checkpoint_manager.py:2009] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0418 20:58:35.759896 134577163413312 checkpoint_manager.py:1512] [process=3] Saving checkpoint at step 0
I0418 20:58:35.762299 134577163413312 event_tracking.py:70] [process=3] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/linen_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_07_eval/checkpoints/0.
I0418 20:58:36.531615 134577163413312 signaling_client.py:364] Using JaxDistributedSignalingClient
I0418 20:58:36.532534 134577163413312 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0418 20:58:36.532590 134577163413312 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
I0418 20:58:36.812289 134577163413312 base_pytree_checkpoint_handler.py:154] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.280747s
I0418 20:58:36.812458 134577163413312 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/blocking_gbytes_per_sec: 5.390 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28617095947265625 s) (per-host)
I0418 20:58:36.812510 134577163413312 base_pytree_checkpoint_handler.py:768] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.286233s (batch_requests_ready=0.002182s, total_serialization_initiated=0.283981s, others=0.000070s)
I0418 20:58:36.812601 134577163413312 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.290614s (all_items=0.000023s, per_item={'items': '0.00002289'}, temp_paths=0.290591)
I0418 20:58:36.813410 134577163413312 event_tracking.py:125] [process=3] [async] Finished blocking save in 1.05 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/linen_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_07_eval/checkpoints/0.
I0418 20:58:36.813750 134447474403072 async_checkpointer.py:76] [process=3][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-18 21:18:36.813716
I0418 20:58:36.817121 134577163413312 checkpoint_manager.py:1560] [process=3][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0418 20:58:36.817418 134446435006208 async_checkpointer.py:280] [process=3][thread=save_finalize] Waiting for background save thread=async_save.
I0418 20:58:36.817575 134577163413312 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/linen_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_07_eval/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776545915.7581882, 'wait_for_prev_duration_secs': 7.367134094238281e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776545915.7599332, 'checkpointer_blocking_duration_secs': 1.0539650917053223, 'get_old_steps_start_time': 1776545916.8139231, 'get_old_steps_duration_secs': 3.075599670410156e-05, 'checkpoint_manager_blocking_start_time': 1776545915.7561963, 'checkpoint_manager_blocking_duration_secs': 1.061340570449829}
I0418 20:58:36.817687 134577163413312 checkpointing.py:409] Started an asynchronous checkpoint save for step 0
I0418 20:58:36.817736 134577163413312 max_utils.py:750] 
Memstats: After params initialized:
I0418 20:58:36.817783 134577163413312 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_10(process=3,(2,2,0,0))
I0418 20:58:36.817826 134577163413312 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_11(process=3,(3,2,0,0))
I0418 20:58:36.817854 134577163413312 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_14(process=3,(2,3,0,0))
I0418 20:58:36.817877 134577163413312 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_15(process=3,(3,3,0,0))
I0418 20:58:37.135036 134577163413312 metric_logger.py:196] completed step: 0, seconds: 11.497, TFLOP/s/device: 1.182, Tokens/s/device: 178.138, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0418 20:58:37.312586 134577163413312 metric_logger.py:196] completed step: 1, seconds: 1.532, TFLOP/s/device: 8.867, Tokens/s/device: 1336.483, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0418 20:58:37.729657 134577163413312 metric_logger.py:196] completed step: 2, seconds: 0.030, TFLOP/s/device: 447.947, Tokens/s/device: 67519.451, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28637.129
I0418 20:58:37.877223 134577163413312 metric_logger.py:196] completed step: 3, seconds: 0.417, TFLOP/s/device: 32.553, Tokens/s/device: 4906.694, total_weights: 65536, loss: 9.734, lm_loss: 9.734, perplexity: 16889.203
I0418 20:58:38.172631 134577163413312 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.674, Tokens/s/device: 13365.878, total_weights: 65536, loss: 9.277, lm_loss: 9.277, perplexity: 10694.614
I0418 20:58:38.178682 134577163413312 metric_logger.py:196] completed step: 5, seconds: 0.148, TFLOP/s/device: 92.099, Tokens/s/device: 13882.111, total_weights: 65536, loss: 8.892, lm_loss: 8.892, perplexity: 7270.717
I0418 20:58:40.418805    2873 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0418 20:58:42.783123 134447456495360 array_metadata_store.py:203] [process=3][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/linen_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_07_eval/checkpoints/0/items/array_metadatas/process_3
I0418 20:58:59.700474 134577163413312 metric_logger.py:196] completed step: 6, seconds: 0.296, TFLOP/s/device: 45.910, Tokens/s/device: 6920.088, total_weights: 65536, loss: 8.592, lm_loss: 8.592, perplexity: 5390.759
I0418 20:58:59.847887 134577163413312 metric_logger.py:196] completed step: 7, seconds: 21.375, TFLOP/s/device: 0.636, Tokens/s/device: 95.814, total_weights: 65536, loss: 8.384, lm_loss: 8.384, perplexity: 4376.905
I0418 20:58:59.995296 134577163413312 metric_logger.py:196] completed step: 8, seconds: 0.153, TFLOP/s/device: 89.030, Tokens/s/device: 13419.565, total_weights: 65536, loss: 8.255, lm_loss: 8.255, perplexity: 3846.406
I0418 20:59:00.142170 134577163413312 checkpointing.py:794] Waiting for step 9 to finish before checkpoint...
I0418 20:59:00.142863 134577163413312 checkpointing.py:798] Waited 0.0007221698760986328 seconds for step 9 to finish before starting checkpointing.
I0418 20:59:00.144953 134577163413312 checkpoint_manager.py:2020] [process=3][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0418 20:59:14.488301 134447474403072 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/gbytes_per_sec: 41.610 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 37.96195673942566 s) (per-host)
I0418 20:59:14.488422 134447474403072 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 37.674560s.
I0418 20:59:22.799199 134447474403072 async_checkpointer.py:160] [process=3][thread=async_save] Background save thread done. Time taken: 45.985320s.
I0418 20:59:22.799504 134446435006208 async_checkpointer.py:288] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save.
I0418 20:59:22.799622 134446435006208 async_checkpointer.py:298] [process=3][thread=save_finalize] No errors found in background save thread=async_save.
I0418 20:59:22.799673 134446435006208 checkpoint_manager.py:2137] [process=3][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0418 20:59:22.801648 134446435006208 checkpoint_manager.py:2146] [process=3][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0418 20:59:22.801827 134577163413312 checkpoint_manager.py:2032] [process=3][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0418 20:59:22.801962 134577163413312 checkpoint_manager.py:1452] Waiting for previous save to complete took 22.657007 seconds. If this number is high, consider checkpointing less frequently.
I0418 20:59:22.803772 134577163413312 checkpoint_manager.py:1512] [process=3] Saving checkpoint at step 9
I0418 20:59:22.805817 134577163413312 event_tracking.py:70] [process=3] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/linen_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_07_eval/checkpoints/9.
I0418 20:59:23.523203 134577163413312 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0418 20:59:23.523311 134577163413312 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
I0418 20:59:23.560824 134577163413312 base_pytree_checkpoint_handler.py:154] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.038774s
I0418 20:59:23.561003 134577163413312 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/blocking_gbytes_per_sec: 36.539 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.042217254638671875 s) (per-host)
I0418 20:59:23.561057 134577163413312 base_pytree_checkpoint_handler.py:768] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.042280s (batch_requests_ready=0.001787s, total_serialization_initiated=0.040423s, others=0.000071s)
I0418 20:59:23.561155 134577163413312 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.046623s (all_items=0.000015s, per_item={'items': '0.00001550'}, temp_paths=0.046607)
I0418 20:59:23.561886 134577163413312 event_tracking.py:125] [process=3] [async] Finished blocking save in 0.76 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/linen_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_07_eval/checkpoints/9.
I0418 20:59:23.562211 134446435006208 async_checkpointer.py:76] [process=3][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-18 21:19:23.562175
I0418 20:59:23.564194 134577163413312 checkpoint_manager.py:1560] [process=3][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0418 20:59:23.564456 134447456495360 async_checkpointer.py:280] [process=3][thread=save_finalize] Waiting for background save thread=async_save.
I0418 20:59:23.564616 134577163413312 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/linen_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_07_eval/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776545940.1449227, 'wait_for_prev_duration_secs': 22.657007455825806, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776545962.8038104, 'checkpointer_blocking_duration_secs': 0.7585535049438477, 'get_old_steps_start_time': 1776545963.5623877, 'get_old_steps_duration_secs': 3.0517578125e-05, 'checkpoint_manager_blocking_start_time': 1776545940.143087, 'checkpoint_manager_blocking_duration_secs': 23.421493530273438}
I0418 20:59:23.564738 134577163413312 checkpointing.py:409] Started an asynchronous checkpoint save for step 9
I0418 20:59:23.564785 134577163413312 checkpoint_manager.py:2020] [process=3][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0418 20:59:31.220216 134424280688384 array_metadata_store.py:203] [process=3][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152/linen_xpk_feat_nnx_linen_converter_and_sharding_tools_20260418_204152_07_eval/checkpoints/9/items/array_metadatas/process_3
I0418 21:00:06.486998 134446435006208 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/gbytes_per_sec: 36.762 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.96817660331726 s) (per-host)
I0418 21:00:06.487108 134446435006208 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.924774s.
I0418 21:00:15.877422 134446435006208 async_checkpointer.py:160] [process=3][thread=async_save] Background save thread done. Time taken: 52.315072s.
I0418 21:00:15.877695 134447456495360 async_checkpointer.py:288] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save.
I0418 21:00:15.877809 134447456495360 async_checkpointer.py:298] [process=3][thread=save_finalize] No errors found in background save thread=async_save.
I0418 21:00:15.877855 134447456495360 checkpoint_manager.py:2137] [process=3][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0418 21:00:15.880352 134447456495360 checkpoint_manager.py:2146] [process=3][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0418 21:00:15.880533 134577163413312 checkpoint_manager.py:2032] [process=3][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0418 21:00:15.880708 134577163413312 checkpoint_manager.py:2009] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0418 21:00:15.881723 134577163413312 metric_logger.py:196] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.137, Tokens/s/device: 13887.947, 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: Sat Apr 18 21:00:27 UTC 2026
EXIT_CODE=0