XPK Start: Mon Apr 20 19:11:25 UTC 2026
2026-04-20 19:11:29.800465: E external/local_xla/xla/stream_executor/cuda/cuda_fft.cc:467] Unable to register cuFFT factory: Attempting to register factory for plugin cuFFT when one has already been registered
WARNING: All log messages before absl::InitializeLog() is called are written to STDERR
E0000 00:00:1776712289.813022 10 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered
E0000 00:00:1776712289.816914 10 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered
W0000 00:00:1776712289.828058 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776712289.828081 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776712289.828084 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1776712289.828086 10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
2026-04-20 19:12:04.111430: 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)
I0420 19:12:04.635776 137584981997376 max_utils.py:273] Attempting to initialize the jax distributed system...
INFO:2026-04-20 19:12:13,675:jax._src.distributed:140: Starting JAX distributed service on [::]:8482
I0420 19:12:13.675369 137584981997376 distributed.py:140] Starting JAX distributed service on [::]:8482
INFO:2026-04-20 19:12:13,677:jax._src.distributed:157: Connecting to JAX distributed service on mt-01-base-wckj3-slice-job-0-0.mt-01-base-wckj3:8482
I0420 19:12:13.677783 137584981997376 distributed.py:157] Connecting to JAX distributed service on mt-01-base-wckj3-slice-job-0-0.mt-01-base-wckj3:8482
I0420 19:12:16.966220 137584981997376 max_utils.py:284] Jax distributed system initialized!
I0420 19:12:23.999302 137584981997376 max_utils.py:800] System Information: Jax Version: 0.8.1
I0420 19:12:23.999410 137584981997376 max_utils.py:801] System Information: Jaxlib Version: 0.8.1
I0420 19:12:23.999451 137584981997376 max_utils.py:802] System Information: Jax Backend: PJRT C API
TFRT TPU v6 lite
Built on Nov 12 2025 14:16:36 (1762985796) cl/831091709
I0420 19:12:23.999485 137584981997376 train_utils.py:377] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0420 19:12:24.629558 137584981997376 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0420 19:12:24.630171 137584981997376 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0420 19:12:24.630356 137584981997376 checkpointing.py:688] Setting up checkpoint logger...
I0420 19:12:24.630405 137584981997376 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True
I0420 19:12:24.630449 137584981997376 pytree_checkpoint_handler.py:589] save_device_host_concurrent_bytes=None
I0420 19:12:24.630802 137584981997376 base_pytree_checkpoint_handler.py:415] 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 0x7d21769792b0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0420 19:12:28.149949 137584981997376 checkpointing.py:266] Enabling policy for fixed interval checkpointing.
I0420 19:12:28.150208 137584981997376 checkpoint_manager.py:709] [process=7][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d0d1456d8b0>}, handler_registry=None
I0420 19:12:28.150445 137584981997376 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d0d1456d8b0>` 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`.
I0420 19:12:28.150493 137584981997376 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d0d14572840>` 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`.
I0420 19:12:28.150529 137584981997376 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 0x7d0d1456d8b0>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d0d1456d8b0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d0d14572840>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d0d14572840>}).
I0420 19:12:28.151057 137584981997376 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.33
I0420 19:12:28.151137 137584981997376 async_checkpointer.py:177] [process=7][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7d0cfc32c180> timeout: 600 secs and primary_host=0 for async checkpoint writes
I0420 19:12:29.404478 137584981997376 checkpoint_manager.py:1818] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260420_190404/linen_xpk_feat_nnx_set_defaults_true_20260420_190404_01_base/checkpoints
I0420 19:12:29.449644 137584981997376 checkpoint_manager.py:929] [process=7][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_set_defaults_true_20260420_190404/linen_xpk_feat_nnx_set_defaults_true_20260420_190404_01_base/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7d0d146d30b0>
I0420 19:12:29.449789 137584981997376 checkpointing.py:302] Checkpoint manager created!
I0420 19:12:30.346245 137584981997376 nnx_wrappers.py:455] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0420 19:12:30.346347 137584981997376 nnx_wrappers.py:455] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0420 19:12:30.724965 137584981997376 attentions.py:1084] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0420 19:12:30.725070 137584981997376 attentions.py:1084] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0420 19:12:30.740977 137584981997376 attentions.py:1085] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0420 19:12:30.741036 137584981997376 attentions.py:1085] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0420 19:12:30.763773 137584981997376 attentions.py:1150] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0420 19:12:30.763840 137584981997376 attentions.py:1150] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0420 19:12:30.779728 137584981997376 attentions.py:1151] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0420 19:12:30.779792 137584981997376 attentions.py:1151] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0420 19:12:30.795457 137584981997376 attentions.py:1152] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0420 19:12:30.795522 137584981997376 attentions.py:1152] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0420 19:12:30.820237 137584981997376 attentions.py:1193] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0420 19:12:30.820306 137584981997376 attentions.py:1193] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0420 19:12:30.839723 137584981997376 linears.py:541] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0420 19:12:30.839787 137584981997376 linears.py:541] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0420 19:12:31.033786 137584981997376 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint
I0420 19:12:31.033905 137584981997376 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0420 19:12:32.460570 137584981997376 maxtext_utils.py:1740] params/params/decoder/decoder_norm/scale
Shape: float32[2048]
Logical: PartitionSpec('norm',)
Physical: (None,)
I0420 19:12:32.460708 137584981997376 maxtext_utils.py:1740] params/params/decoder/layers/mlp/wi_0/kernel
Shape: float32[2048,16,7168]
Logical: PartitionSpec('embed', 'layers', 'mlp')
Physical: ('fsdp', None, None)
I0420 19:12:32.460768 137584981997376 maxtext_utils.py:1740] params/params/decoder/layers/mlp/wi_1/kernel
Shape: float32[2048,16,7168]
Logical: PartitionSpec('embed', 'layers', 'mlp')
Physical: ('fsdp', None, None)
I0420 19:12:32.460831 137584981997376 maxtext_utils.py:1740] params/params/decoder/layers/mlp/wo/kernel
Shape: float32[7168,16,2048]
Logical: PartitionSpec('mlp', 'layers', 'embed')
Physical: (None, None, 'fsdp')
I0420 19:12:32.460887 137584981997376 maxtext_utils.py:1740] params/params/decoder/layers/post_self_attention_layer_norm/scale
Shape: float32[2048,16]
Logical: PartitionSpec('norm', 'layers')
Physical: (None, None)
I0420 19:12:32.460927 137584981997376 maxtext_utils.py:1740] params/params/decoder/layers/pre_self_attention_layer_norm/scale
Shape: float32[2048,16]
Logical: PartitionSpec('norm', 'layers')
Physical: (None, None)
I0420 19:12:32.460983 137584981997376 maxtext_utils.py:1740] params/params/decoder/layers/self_attention/key/kernel
Shape: float32[2048,16,16,128]
Logical: PartitionSpec('embed', 'layers', 'kv_heads', 'kv_head_dim')
Physical: ('fsdp', None, None, None)
I0420 19:12:32.461039 137584981997376 maxtext_utils.py:1740] params/params/decoder/layers/self_attention/out/kernel
Shape: float32[16,16,128,2048]
Logical: PartitionSpec('heads', 'layers', 'kv', 'embed')
Physical: (None, None, None, 'fsdp')
I0420 19:12:32.461083 137584981997376 maxtext_utils.py:1740] params/params/decoder/layers/self_attention/query/kernel
Shape: float32[2048,16,16,128]
Logical: PartitionSpec('embed', 'layers', 'q_heads', 'kv')
Physical: ('fsdp', None, None, None)
I0420 19:12:32.461122 137584981997376 maxtext_utils.py:1740] params/params/decoder/layers/self_attention/value/kernel
Shape: float32[2048,16,16,128]
Logical: PartitionSpec('embed', 'layers', 'kv_heads', 'kv_head_dim')
Physical: ('fsdp', None, None, None)
I0420 19:12:32.461199 137584981997376 maxtext_utils.py:1740] params/params/decoder/logits_dense/kernel
Shape: float32[2048,32000]
Logical: PartitionSpec('embed', 'vocab')
Physical: ('fsdp', None)
I0420 19:12:32.461256 137584981997376 maxtext_utils.py:1740] params/params/token_embedder/embedding
Shape: float32[32000,2048]
Logical: PartitionSpec('vocab', 'embed')
Physical: (None, 'fsdp')
I0420 19:12:32.959867 137584981997376 train.py:158] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0420 19:12:32.959961 137584981997376 train.py:158] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0420 19:12:32.974756 137584981997376 train.py:165] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0420 19:12:32.974819 137584981997376 train.py:165] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0420 19:12:43.713973 137584981997376 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.
I0420 19:12:43.714859 137584981997376 metric_logger.py:289] number parameters: 1.104 billion
I0420 19:12:54.914634 137584981997376 checkpointing.py:794] Waiting for step 0 to finish before checkpoint...
I0420 19:12:55.072338 137584981997376 checkpointing.py:798] Waited 0.1576850414276123 seconds for step 0 to finish before starting checkpointing.
I0420 19:12:55.074975 137584981997376 checkpoint_manager.py:2013] [process=7][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0420 19:12:55.076631 137584981997376 checkpoint_manager.py:1518] [process=7] Saving checkpoint at step 0
I0420 19:12:55.079677 137584981997376 async_checkpointer.py:452] [process=7] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260420_190404/linen_xpk_feat_nnx_set_defaults_true_20260420_190404_01_base/checkpoints/0.
I0420 19:12:56.103449 137584981997376 signaling_client.py:364] Using JaxDistributedSignalingClient
I0420 19:12:56.104483 137584981997376 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array.
I0420 19:12:56.104538 137584981997376 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
I0420 19:12:56.353411 137584981997376 base_pytree_checkpoint_handler.py:153] [process=7][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.250042s
I0420 19:12:56.353587 137584981997376 base_pytree_checkpoint_handler.py:129] [process=7] /jax/checkpoint/write/blocking_gbytes_per_sec: 2.862 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.5389392375946045 s) (per-host)
I0420 19:12:56.353641 137584981997376 base_pytree_checkpoint_handler.py:737] [process=7][thread=MainThread] Initiated Pytree async_save. Time taken: 0.539004s (batch_requests_ready=0.285319s, total_serialization_initiated=0.253611s, others=0.000074s)
I0420 19:12:56.353732 137584981997376 composite_checkpoint_handler.py:715] [process=7][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.543098s (all_items=0.000019s, per_item={'items': '0.00001884'}, temp_paths=0.543079)
I0420 19:12:56.354660 137462156351232 async_checkpointer.py:79] [process=7][thread=async_save] Background save thread started.
I0420 19:12:56.354830 137584981997376 async_checkpointer.py:561] Finished blocking save. Time taken: 1.278132s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260420_190404/linen_xpk_feat_nnx_set_defaults_true_20260420_190404_01_base/checkpoints/0.
I0420 19:12:56.363374 137584981997376 checkpoint_manager.py:1566] [process=7][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0420 19:12:56.363671 137458373076736 async_checkpointer.py:265] [process=7][thread=save_finalize] Waiting for background save thread=async_save.
I0420 19:12:56.363826 137584981997376 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260420_190404/linen_xpk_feat_nnx_set_defaults_true_20260420_190404_01_base/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776712375.0749443, 'wait_for_prev_duration_secs': 0.00012421607971191406, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776712375.0766685, 'checkpointer_blocking_duration_secs': 1.2782671451568604, 'get_old_steps_start_time': 1776712376.3549554, 'get_old_steps_duration_secs': 2.5987625122070312e-05, 'checkpoint_manager_blocking_start_time': 1776712375.0728512, 'checkpoint_manager_blocking_duration_secs': 1.2909355163574219}
I0420 19:12:56.363928 137584981997376 checkpointing.py:409] Started an asynchronous checkpoint save for step 0
I0420 19:12:56.363980 137584981997376 max_utils.py:750]
Memstats: After params initialized:
I0420 19:12:56.364030 137584981997376 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_26(process=7,(2,6,0,0))
I0420 19:12:56.364064 137584981997376 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_27(process=7,(3,6,0,0))
I0420 19:12:56.364092 137584981997376 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_30(process=7,(2,7,0,0))
I0420 19:12:56.364118 137584981997376 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_31(process=7,(3,7,0,0))
I0420 19:12:56.630865 137584981997376 metric_logger.py:185] completed step: 0, seconds: 11.200, TFLOP/s/device: 1.213, Tokens/s/device: 182.863, total_weights: 65536, loss: 10.874
I0420 19:12:56.806803 137584981997376 metric_logger.py:185] completed step: 1, seconds: 1.715, TFLOP/s/device: 7.923, Tokens/s/device: 1194.187, total_weights: 65536, loss: 10.874
I0420 19:12:57.193350 137584981997376 metric_logger.py:185] completed step: 2, seconds: 0.028, TFLOP/s/device: 477.160, Tokens/s/device: 71922.739, total_weights: 65536, loss: 10.263
I0420 19:12:57.340419 137584981997376 metric_logger.py:185] completed step: 3, seconds: 0.387, TFLOP/s/device: 35.132, Tokens/s/device: 5295.438, total_weights: 65536, loss: 9.734
I0420 19:12:57.635380 137584981997376 metric_logger.py:185] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.787, Tokens/s/device: 13382.909, total_weights: 65536, loss: 9.278
I0420 19:12:57.641213 137584981997376 metric_logger.py:185] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.367, Tokens/s/device: 13922.502, total_weights: 65536, loss: 8.892
I0420 19:13:18.344261 137584981997376 metric_logger.py:185] completed step: 6, seconds: 0.295, TFLOP/s/device: 45.980, Tokens/s/device: 6930.673, total_weights: 65536, loss: 8.592
I0420 19:13:18.491720 137584981997376 metric_logger.py:185] completed step: 7, seconds: 20.556, TFLOP/s/device: 0.661, Tokens/s/device: 99.629, total_weights: 65536, loss: 8.384
I0420 19:13:18.639048 137584981997376 metric_logger.py:185] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.347, Tokens/s/device: 13467.394, total_weights: 65536, loss: 8.255
I0420 19:13:18.786094 137584981997376 checkpointing.py:794] Waiting for step 9 to finish before checkpoint...
I0420 19:13:18.786838 137584981997376 checkpointing.py:798] Waited 0.0007631778717041016 seconds for step 9 to finish before starting checkpointing.
I0420 19:13:18.788848 137584981997376 checkpoint_manager.py:2024] [process=7][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0420 19:13:19.462030 2644 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0420 19:13:21.388205 137462164743936 array_metadata_store.py:203] [process=7][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260420_190404/linen_xpk_feat_nnx_set_defaults_true_20260420_190404_01_base/checkpoints/0/items/array_metadatas/process_7
I0420 19:13:53.431050 137462156351232 base_pytree_checkpoint_handler.py:129] [process=7] /jax/checkpoint/write/gbytes_per_sec: 27.416 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 57.61635756492615 s) (per-host)
I0420 19:13:53.431211 137462156351232 async_checkpointer.py:90] [process=7][thread=async_save] 3 Handler Commit operations completed. Time taken: 57.076434s.
I0420 19:14:01.634038 137462156351232 async_checkpointer.py:144] [process=7][thread=async_save] Background save thread done. Time taken: 65.279249s.
I0420 19:14:01.634361 137458373076736 async_checkpointer.py:273] [process=7][thread=save_finalize] Done with waiting for background save thread=async_save.
I0420 19:14:01.634488 137458373076736 async_checkpointer.py:283] [process=7][thread=save_finalize] No errors found in background save thread=async_save.
I0420 19:14:01.634541 137458373076736 checkpoint_manager.py:2133] [process=7][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0420 19:14:01.635941 137458373076736 checkpoint_manager.py:2142] [process=7][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0420 19:14:01.636116 137584981997376 checkpoint_manager.py:2036] [process=7][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0420 19:14:01.636276 137584981997376 checkpoint_manager.py:1458] Waiting for previous save to complete took 42.847430 seconds. If this number is high, consider checkpointing less frequently.
I0420 19:14:01.638058 137584981997376 checkpoint_manager.py:1518] [process=7] Saving checkpoint at step 9
I0420 19:14:01.641654 137584981997376 async_checkpointer.py:452] [process=7] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260420_190404/linen_xpk_feat_nnx_set_defaults_true_20260420_190404_01_base/checkpoints/9.
I0420 19:14:02.587558 137584981997376 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array.
I0420 19:14:02.587653 137584981997376 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
I0420 19:14:02.630126 137584981997376 base_pytree_checkpoint_handler.py:153] [process=7][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.043770s
I0420 19:14:02.630323 137584981997376 base_pytree_checkpoint_handler.py:129] [process=7] /jax/checkpoint/write/blocking_gbytes_per_sec: 5.181 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.29770851135253906 s) (per-host)
I0420 19:14:02.630388 137584981997376 base_pytree_checkpoint_handler.py:737] [process=7][thread=MainThread] Initiated Pytree async_save. Time taken: 0.297778s (batch_requests_ready=0.252076s, total_serialization_initiated=0.045621s, others=0.000081s)
I0420 19:14:02.630503 137584981997376 composite_checkpoint_handler.py:715] [process=7][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.301906s (all_items=0.000015s, per_item={'items': '0.00001478'}, temp_paths=0.301891)
I0420 19:14:02.631338 137459440236288 async_checkpointer.py:79] [process=7][thread=async_save] Background save thread started.
I0420 19:14:02.631491 137584981997376 async_checkpointer.py:561] Finished blocking save. Time taken: 0.993367s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260420_190404/linen_xpk_feat_nnx_set_defaults_true_20260420_190404_01_base/checkpoints/9.
I0420 19:14:02.676563 137584981997376 checkpoint_manager.py:1566] [process=7][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0420 19:14:02.676877 137458373076736 async_checkpointer.py:265] [process=7][thread=save_finalize] Waiting for background save thread=async_save.
I0420 19:14:02.677053 137584981997376 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260420_190404/linen_xpk_feat_nnx_set_defaults_true_20260420_190404_01_base/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776712398.7888193, 'wait_for_prev_duration_secs': 42.84743046760559, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776712441.6380992, 'checkpointer_blocking_duration_secs': 0.9934670925140381, 'get_old_steps_start_time': 1776712442.6315892, 'get_old_steps_duration_secs': 2.5510787963867188e-05, 'checkpoint_manager_blocking_start_time': 1776712398.787069, 'checkpoint_manager_blocking_duration_secs': 43.889947175979614}
I0420 19:14:02.677195 137584981997376 checkpointing.py:409] Started an asynchronous checkpoint save for step 9
I0420 19:14:02.677251 137584981997376 checkpoint_manager.py:2024] [process=7][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0420 19:14:07.799698 137462164743936 array_metadata_store.py:203] [process=7][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260420_190404/linen_xpk_feat_nnx_set_defaults_true_20260420_190404_01_base/checkpoints/9/items/array_metadatas/process_7
I0420 19:14:44.944954 137459440236288 base_pytree_checkpoint_handler.py:129] [process=7] /jax/checkpoint/write/gbytes_per_sec: 37.069 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.61230731010437 s) (per-host)
I0420 19:14:44.945058 137459440236288 async_checkpointer.py:90] [process=7][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.313610s.
I0420 19:14:52.310953 137459440236288 async_checkpointer.py:144] [process=7][thread=async_save] Background save thread done. Time taken: 49.679490s.
I0420 19:14:52.311249 137458373076736 async_checkpointer.py:273] [process=7][thread=save_finalize] Done with waiting for background save thread=async_save.
I0420 19:14:52.311369 137458373076736 async_checkpointer.py:283] [process=7][thread=save_finalize] No errors found in background save thread=async_save.
I0420 19:14:52.311417 137458373076736 checkpoint_manager.py:2133] [process=7][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0420 19:14:52.312876 137458373076736 checkpoint_manager.py:2142] [process=7][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0420 19:14:52.313049 137584981997376 checkpoint_manager.py:2036] [process=7][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0420 19:14:52.313210 137584981997376 checkpoint_manager.py:2013] [process=7][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0420 19:14:52.313823 137584981997376 metric_logger.py:185] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.164, Tokens/s/device: 13891.904, total_weights: 65536, loss: 8.179
Per train step:
Total TFLOPs: 13.59
split as 93.93% learnable weight flops and 6.07% attention flops
XPK End: Mon Apr 20 19:15:05 UTC 2026
EXIT_CODE=0