XPK Start: Thu Apr 16 22:31:06 UTC 2026 PyTorch was not found. Models won't be available and only tokenizers, configuration and file/data utilities can be used. 2026-04-16 22:31:30.472645: 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) I0416 22:31:30.648947 132533837936448 max_utils.py:273] Attempting to initialize the jax distributed system... I0416 22:31:39.690090 132533837936448 distributed.py:149] Starting JAX distributed service on [::]:8482 I0416 22:31:39.692457 132533837936448 distributed.py:172] Connecting to JAX distributed service on mt-06-grad-accum-6ll87-slice-job-0-0.mt-06-grad-accum-6ll87:8482 I0416 22:31:40.907051 132533837936448 max_utils.py:284] Jax distributed system initialized! I0416 22:31:46.909602 132533837936448 max_utils.py:800] System Information: Jax Version: 0.9.2 I0416 22:31:46.909708 132533837936448 max_utils.py:801] System Information: Jaxlib Version: 0.9.2 I0416 22:31:46.909748 132533837936448 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 I0416 22:31:46.909781 132533837936448 train_utils.py:377] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing. I0416 22:31:47.596564 132533837936448 maxtext_utils.py:1687] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1) I0416 22:31:47.708704 132533837936448 checkpointing.py:688] Setting up checkpoint logger... I0416 22:31:47.708815 132533837936448 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True I0416 22:31:47.708871 132533837936448 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None I0416 22:31:47.709077 132533837936448 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 0x78894fd1f320>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB) I0416 22:31:50.543763 132533837936448 checkpointing.py:266] Enabling policy for fixed interval checkpointing. I0416 22:31:50.544013 132533837936448 checkpoint_manager.py:708] [process=6][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x787528107470>}, handler_registry=None I0416 22:31:50.544244 132533837936448 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x787528107470>` 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`. I0416 22:31:50.544291 132533837936448 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7874e84d1220>` 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`. I0416 22:31:50.544327 132533837936448 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 0x787528107470>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x787528107470>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7874e84d1220>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7874e84d1220>}). I0416 22:31:50.544716 132533837936448 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34 I0416 22:31:50.544789 132533837936448 async_checkpointer.py:192] [process=6][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x787508682020> timeout: 1200 secs and primary_host=0 for async checkpoint writes I0416 22:31:51.983419 132533837936448 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_06_grad_accum/checkpoints I0416 22:31:52.132691 132533837936448 checkpoint_manager.py:929] [process=6][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/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_06_grad_accum/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7875086f20c0> I0416 22:31:52.132895 132533837936448 checkpointing.py:302] Checkpoint manager created! I0416 22:31:53.905692 132533837936448 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint I0416 22:31:53.905809 132533837936448 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint. fsdp: 32 I0416 22:31:55.258621 132533837936448 maxtext_utils.py:1805] decoder/decoder_norm/scale/value Shape: float32[2048] Physical: (None,) I0416 22:31:55.258738 132533837936448 maxtext_utils.py:1805] decoder/layers/mlp/wi_0/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0416 22:31:55.258789 132533837936448 maxtext_utils.py:1805] decoder/layers/mlp/wi_1/kernel/value Shape: float32[2048,16,7168] Physical: ('fsdp', None, None) I0416 22:31:55.258842 132533837936448 maxtext_utils.py:1805] decoder/layers/mlp/wo/kernel/value Shape: float32[7168,16,2048] Physical: (None, None, 'fsdp') I0416 22:31:55.258882 132533837936448 maxtext_utils.py:1805] decoder/layers/post_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0416 22:31:55.258917 132533837936448 maxtext_utils.py:1805] decoder/layers/pre_self_attention_layer_norm/scale/value Shape: float32[2048,16] Physical: (None, None) I0416 22:31:55.258953 132533837936448 maxtext_utils.py:1805] decoder/layers/self_attention/key/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0416 22:31:55.258987 132533837936448 maxtext_utils.py:1805] decoder/layers/self_attention/out/kernel/value Shape: float32[16,16,128,2048] Physical: (None, None, None, 'fsdp') I0416 22:31:55.259021 132533837936448 maxtext_utils.py:1805] decoder/layers/self_attention/query/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0416 22:31:55.259053 132533837936448 maxtext_utils.py:1805] decoder/layers/self_attention/value/kernel/value Shape: float32[2048,16,16,128] Physical: ('fsdp', None, None, None) I0416 22:31:55.259084 132533837936448 maxtext_utils.py:1805] decoder/logits_dense/kernel/value Shape: float32[2048,32000] Physical: ('fsdp', None) I0416 22:31:55.259115 132533837936448 maxtext_utils.py:1805] token_embedder/embedding/value Shape: float32[32000,2048] Physical: (None, 'fsdp') I0416 22:31:55.642533 132533837936448 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048]............................................... Unknown. I0416 22:31:55.642624 132533837936448 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048]............................................... (None,). I0416 22:31:55.657358 132533837936448 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048,16,7168]....................................... Unknown. I0416 22:31:55.657420 132533837936448 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048,16,7168]....................................... ('fsdp', None, None). I0416 22:31:55.686735 132533837936448 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[7168,16,2048]....................................... Unknown. I0416 22:31:55.686806 132533837936448 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[7168,16,2048]....................................... (None, None, 'fsdp'). I0416 22:31:55.701458 132533837936448 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048,16]............................................ Unknown. I0416 22:31:55.701513 132533837936448 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048,16]............................................ (None, None). I0416 22:31:55.730597 132533837936448 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048,16,16,128]..................................... Unknown. I0416 22:31:55.730663 132533837936448 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048,16,16,128]..................................... ('fsdp', None, None, None). I0416 22:31:55.745263 132533837936448 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[16,16,128,2048]..................................... Unknown. I0416 22:31:55.745322 132533837936448 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[16,16,128,2048]..................................... (None, None, None, 'fsdp'). I0416 22:31:55.795027 132533837936448 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[2048,32000]......................................... Unknown. I0416 22:31:55.795137 132533837936448 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[2048,32000]......................................... ('fsdp', None). I0416 22:31:55.810650 132533837936448 gradient_accumulation.py:70] gradient_accumulation/inputs Logical: float32[32000,2048]......................................... Unknown. I0416 22:31:55.810706 132533837936448 gradient_accumulation.py:70] gradient_accumulation/inputs Physical: float32[32000,2048]......................................... (None, 'fsdp'). I0416 22:31:56.030369 132533837936448 nnx_decoders.py:465] nnx_decoders/carry Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0416 22:31:56.030517 132533837936448 nnx_decoders.py:465] nnx_decoders/carry Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0416 22:31:56.037345 132533837936448 nnx_decoders.py:465] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed'). I0416 22:31:56.037447 132533837936448 nnx_decoders.py:465] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0416 22:31:56.053944 132533837936448 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0416 22:31:56.054082 132533837936448 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0416 22:31:56.069979 132533837936448 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed'). I0416 22:31:56.070116 132533837936448 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None). I0416 22:31:56.100574 132533837936448 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0416 22:31:56.100728 132533837936448 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0416 22:31:56.117229 132533837936448 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0416 22:31:56.117367 132533837936448 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0416 22:31:56.133312 132533837936448 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim'). I0416 22:31:56.133447 132533837936448 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0416 22:31:56.161727 132533837936448 attentions.py:1197] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv'). I0416 22:31:56.161910 132533837936448 attentions.py:1197] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None). I0416 22:31:56.183401 132533837936448 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp'). I0416 22:31:56.183503 132533837936448 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None). I0416 22:32:07.697592 132533837936448 max_utils.py:791] Total memory size: 1.7 GB, Output size: 0.4 GB, Temp size: 1.3 GB, Argument size: 0.4 GB, Host temp size: 0.0 GB. I0416 22:32:07.699966 132533837936448 metric_logger.py:289] number parameters: 1.104 billion I0416 22:32:09.333908 132533837936448 checkpointing.py:794] Waiting for step 0 to finish before checkpoint... I0416 22:32:19.995870 132533837936448 checkpointing.py:798] Waited 10.661911487579346 seconds for step 0 to finish before starting checkpointing. I0416 22:32:19.998136 132533837936448 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0416 22:32:19.999772 132533837936448 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 0 I0416 22:32:20.001813 132533837936448 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_06_grad_accum/checkpoints/0. I0416 22:32:20.332249 132533837936448 signaling_client.py:364] Using JaxDistributedSignalingClient I0416 22:32:20.333262 132533837936448 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array. I0416 22:32:20.333320 132533837936448 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 I0416 22:32:20.609449 132533837936448 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.277954s I0416 22:32:20.609619 132533837936448 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 5.366 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28746533393859863 s) (per-host) I0416 22:32:20.609680 132533837936448 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.287538s (batch_requests_ready=0.003160s, total_serialization_initiated=0.284298s, others=0.000079s) I0416 22:32:20.609776 132533837936448 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.291610s (all_items=0.000018s, per_item={'items': '0.00001788'}, temp_paths=0.291592) I0416 22:32:20.610601 132533837936448 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.61 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_06_grad_accum/checkpoints/0. I0416 22:32:20.610938 132405763491584 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-16 22:52:20.610903 I0416 22:32:20.618589 132533837936448 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize I0416 22:32:20.618907 132405730457344 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0416 22:32:20.619060 132533837936448 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_06_grad_accum/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776378739.9981177, 'wait_for_prev_duration_secs': 6.031990051269531e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1776378739.9998164, 'checkpointer_blocking_duration_secs': 0.6112716197967529, 'get_old_steps_start_time': 1776378740.611113, 'get_old_steps_duration_secs': 3.0279159545898438e-05, 'checkpoint_manager_blocking_start_time': 1776378739.99625, 'checkpoint_manager_blocking_duration_secs': 0.6227724552154541} I0416 22:32:20.619167 132533837936448 checkpointing.py:409] Started an asynchronous checkpoint save for step 0 I0416 22:32:20.619234 132533837936448 max_utils.py:750] Memstats: After params initialized: I0416 22:32:20.619283 132533837936448 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_24(process=6,(0,6,0,0)) I0416 22:32:20.619314 132533837936448 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_25(process=6,(1,6,0,0)) I0416 22:32:20.619341 132533837936448 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_28(process=6,(0,7,0,0)) I0416 22:32:20.619366 132533837936448 max_utils.py:756] Using (GB) 0.43 / 31.25 (1.376000%) on TPU_29(process=6,(1,7,0,0)) I0416 22:32:20.936432 132533837936448 metric_logger.py:185] completed step: 0, seconds: 1.633, TFLOP/s/device: 33.283, Tokens/s/device: 5016.844, total_weights: 262144, loss: 10.876 I0416 22:32:21.540599 132533837936448 metric_logger.py:185] completed step: 1, seconds: 11.601, TFLOP/s/device: 4.685, Tokens/s/device: 706.152, total_weights: 262144, loss: 10.876 I0416 22:32:22.118964 132533837936448 metric_logger.py:185] completed step: 2, seconds: 0.027, TFLOP/s/device: 1987.221, Tokens/s/device: 299535.632, total_weights: 262144, loss: 10.561 I0416 22:32:22.697280 132533837936448 metric_logger.py:185] completed step: 3, seconds: 0.584, TFLOP/s/device: 93.051, Tokens/s/device: 14025.596, total_weights: 262144, loss: 10.270 I0416 22:32:23.544673 2554 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com I0416 22:32:23.854943 132533837936448 metric_logger.py:185] completed step: 4, seconds: 0.579, TFLOP/s/device: 93.917, Tokens/s/device: 14156.185, total_weights: 262144, loss: 10.021 I0416 22:32:23.864457 132533837936448 metric_logger.py:185] completed step: 5, seconds: 0.578, TFLOP/s/device: 94.019, Tokens/s/device: 14171.564, total_weights: 262144, loss: 9.819 I0416 22:32:25.527321 132405738850048 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_06_grad_accum/checkpoints/0/items/array_metadatas/process_6 I0416 22:32:57.299297 132405763491584 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 42.718 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 36.977089405059814 s) (per-host) I0416 22:32:57.299418 132405763491584 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 36.688368s. I0416 22:33:06.569738 132405763491584 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 45.958675s. I0416 22:33:06.570064 132405730457344 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0416 22:33:06.570178 132405730457344 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0416 22:33:06.570226 132405730457344 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts... I0416 22:33:06.572099 132405730457344 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts. I0416 22:33:09.726486 132533837936448 metric_logger.py:185] completed step: 6, seconds: 1.160, TFLOP/s/device: 46.872, Tokens/s/device: 7065.096, total_weights: 262144, loss: 9.666 I0416 22:33:10.304881 132533837936448 metric_logger.py:185] completed step: 7, seconds: 45.286, TFLOP/s/device: 1.200, Tokens/s/device: 180.895, total_weights: 262144, loss: 9.560 I0416 22:33:10.883362 132533837936448 metric_logger.py:185] completed step: 8, seconds: 0.584, TFLOP/s/device: 93.041, Tokens/s/device: 14024.107, total_weights: 262144, loss: 9.495 I0416 22:33:11.462573 132533837936448 checkpointing.py:794] Waiting for step 9 to finish before checkpoint... I0416 22:33:11.463208 132533837936448 checkpointing.py:798] Waited 0.0006525516510009766 seconds for step 9 to finish before starting checkpointing. I0416 22:33:11.465363 132533837936448 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0416 22:33:11.467255 132533837936448 checkpoint_manager.py:1512] [process=6] Saving checkpoint at step 9 I0416 22:33:11.468901 132533837936448 event_tracking.py:70] [process=6] [async] Started save checkpoint @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_06_grad_accum/checkpoints/9. I0416 22:33:12.003604 132533837936448 jax_array_handlers.py:360] Scheduling D2H of 69 prioritized jax.Array. I0416 22:33:12.003696 132533837936448 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 I0416 22:33:12.039120 132533837936448 base_pytree_checkpoint_handler.py:154] [process=6][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.037080s I0416 22:33:12.039285 132533837936448 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/blocking_gbytes_per_sec: 34.919 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04417538642883301 s) (per-host) I0416 22:33:12.039335 132533837936448 base_pytree_checkpoint_handler.py:768] [process=6][thread=MainThread] Initiated Pytree async_save. Time taken: 0.044235s (batch_requests_ready=0.002631s, total_serialization_initiated=0.041538s, others=0.000067s) I0416 22:33:12.039433 132533837936448 composite_checkpoint_handler.py:715] [process=6][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.048400s (all_items=0.000014s, per_item={'items': '0.00001407'}, temp_paths=0.048386) I0416 22:33:12.040175 132533837936448 event_tracking.py:125] [process=6] [async] Finished blocking save in 0.57 seconds. Continuing save @ gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_06_grad_accum/checkpoints/9. I0416 22:33:12.040462 132405780276992 async_checkpointer.py:76] [process=6][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-16 22:53:12.040430 I0416 22:33:12.043849 132533837936448 checkpoint_manager.py:1560] [process=6][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize I0416 22:33:12.044129 132405738850048 async_checkpointer.py:280] [process=6][thread=save_finalize] Waiting for background save thread=async_save. I0416 22:33:12.044290 132533837936448 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_06_grad_accum/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1776378791.4653294, 'wait_for_prev_duration_secs': 7.295608520507812e-05, 'time_between_consecutive_saves_sec': 4.89319109916687, 'checkpointer_blocking_start_time': 1776378791.4673386, 'checkpointer_blocking_duration_secs': 0.5732641220092773, 'get_old_steps_start_time': 1776378792.0406256, 'get_old_steps_duration_secs': 2.86102294921875e-05, 'checkpoint_manager_blocking_start_time': 1776378791.4634306, 'checkpoint_manager_blocking_duration_secs': 0.5808255672454834} I0416 22:33:12.044400 132533837936448 checkpointing.py:409] Started an asynchronous checkpoint save for step 9 I0416 22:33:12.044444 132533837936448 checkpoint_manager.py:2020] [process=6][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete. I0416 22:33:18.340915 132409529980672 array_metadata_store.py:203] [process=6][thread=array_type_handler] Wrote 69 array_metadata.ArrayMetadata to gs://lance-maxtext/nnx_ckpt_xpk_feat_nnx_post_train_fixes_20260416_221011/nnx_xpk_feat_nnx_post_train_fixes_20260416_221011_06_grad_accum/checkpoints/9/items/array_metadatas/process_6 I0416 22:33:54.044772 132405780276992 base_pytree_checkpoint_handler.py:130] [process=6] /jax/orbax/write/gbytes_per_sec: 37.565 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.04962110519409 s) (per-host) I0416 22:33:54.044918 132405780276992 async_checkpointer.py:90] [process=6][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.004347s. I0416 22:34:02.046622 132405780276992 async_checkpointer.py:160] [process=6][thread=async_save] Background save thread done. Time taken: 50.006037s. I0416 22:34:02.046930 132405738850048 async_checkpointer.py:288] [process=6][thread=save_finalize] Done with waiting for background save thread=async_save. I0416 22:34:02.047054 132405738850048 async_checkpointer.py:298] [process=6][thread=save_finalize] No errors found in background save thread=async_save. I0416 22:34:02.047102 132405738850048 checkpoint_manager.py:2137] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts... I0416 22:34:02.049509 132405738850048 checkpoint_manager.py:2146] [process=6][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts. I0416 22:34:02.049682 132533837936448 checkpoint_manager.py:2032] [process=6][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9. I0416 22:34:02.049876 132533837936448 checkpoint_manager.py:2009] [process=6][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning. I0416 22:34:02.050491 132533837936448 metric_logger.py:185] completed step: 9, seconds: 0.578, TFLOP/s/device: 94.014, Tokens/s/device: 14170.853, total_weights: 262144, loss: 9.457 Per train step: Total TFLOPs: 54.35 split as 93.93% learnable weight flops and 6.07% attention flops XPK End: Thu Apr 16 22:34:12 UTC 2026 EXIT_CODE=0