MaxView

Timing Test Reference Updates
‹ 01_baseCase: 02_synthetic03_dropout ›

Metrics: main (b117f50cf) vs feat/nnx-post-train-fixes (28b1e4a16)

Metricmain  b117f50cffeat/nnx-post-train-fixes  28b1e4a16Diff (feat/nnx-post-train-fixes − main)
Parameters1.104 billion1.104 billion—
Final loss8.17908.17900
TFLOP/s92.33092.270-0.06
Tok/s13917.013907.9-9.073
Avg s/step2.6502.674+0.024
Memory %1.381.380
JAX0.9.20.9.2—

Diff = branch value − main value. Green = branch improved. Red = branch regressed.

main  ·  b117f50cf  ·  main_20260424_070227  ·  full log 
XPK Start: Fri Apr 24 07:06:10 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. 
2026-04-24 07:06:35.277905: 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)
I0424 07:06:35.488466 137553131562816 max_utils.py:273] Attempting to initialize the jax distributed system...
I0424 07:06:44.530469 137553131562816 distributed.py:149] Starting JAX distributed service on [::]:8482
I0424 07:06:44.533037 137553131562816 distributed.py:172] Connecting to JAX distributed service on mt-02-synthetic-0yhrp-slice-job-0-0.mt-02-synthetic-0yhrp:8482
I0424 07:06:46.362699 137553131562816 max_utils.py:284] Jax distributed system initialized!
I0424 07:06:52.740434 137553131562816 max_utils.py:800] System Information: Jax Version: 0.9.2
I0424 07:06:52.740541 137553131562816 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0424 07:06:52.740585 137553131562816 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
I0424 07:06:52.740621 137553131562816 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0424 07:06:53.437979 137553131562816 maxtext_utils.py:1604] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0424 07:06:53.438253 137553131562816 checkpointing.py:677] Setting up checkpoint logger...
I0424 07:06:53.438306 137553131562816 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0424 07:06:53.438349 137553131562816 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0424 07:06:53.438678 137553131562816 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 0x7d1a06d066c0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0424 07:06:56.368603 137553131562816 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0424 07:06:56.368838 137553131562816 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 0x7d05883b1610>}, handler_registry=None
I0424 07:06:56.369086 137553131562816 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d05883b1610>` 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`.
I0424 07:06:56.369134 137553131562816 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d04ac718d10>` 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`.
I0424 07:06:56.369170 137553131562816 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 0x7d05883b1610>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7d05883b1610>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d04ac718d10>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7d04ac718d10>}).
I0424 07:06:56.369489 137553131562816 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0424 07:06:56.369565 137553131562816 async_checkpointer.py:192] [process=4][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7d04ac389a80> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0424 07:06:57.364063 137553131562816 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_02_synthetic/checkpoints
I0424 07:06:57.403423 137553131562816 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_20260424_070227/linen_xpk_main_20260424_070227_02_synthetic/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7d0588165520>
I0424 07:06:57.403560 137553131562816 checkpointing.py:301] Checkpoint manager created!
I0424 07:06:58.327107 137553131562816 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0424 07:06:58.327219 137553131562816 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0424 07:06:58.708178 137553131562816 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0424 07:06:58.708273 137553131562816 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0424 07:06:58.724666 137553131562816 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0424 07:06:58.724724 137553131562816 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0424 07:06:58.748585 137553131562816 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0424 07:06:58.748656 137553131562816 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0424 07:06:58.765085 137553131562816 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0424 07:06:58.765150 137553131562816 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0424 07:06:58.781593 137553131562816 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0424 07:06:58.781652 137553131562816 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0424 07:06:58.806613 137553131562816 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0424 07:06:58.806678 137553131562816 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0424 07:06:58.827754 137553131562816 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0424 07:06:58.827820 137553131562816 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0424 07:06:59.036724 137553131562816 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0424 07:06:59.036828 137553131562816 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0424 07:07:00.462896 137553131562816 maxtext_utils.py:1707]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0424 07:07:00.463028 137553131562816 maxtext_utils.py:1707]  params/params/decoder/layers/mlp/wi_0/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0424 07:07:00.463080 137553131562816 maxtext_utils.py:1707]  params/params/decoder/layers/mlp/wi_1/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0424 07:07:00.463135 137553131562816 maxtext_utils.py:1707]  params/params/decoder/layers/mlp/wo/kernel
    Shape:     float32[7168,16,2048]
    Logical:   P('mlp', 'layers', 'embed')
    Physical:  (None, None, 'fsdp')
I0424 07:07:00.463185 137553131562816 maxtext_utils.py:1707]  params/params/decoder/layers/post_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0424 07:07:00.463221 137553131562816 maxtext_utils.py:1707]  params/params/decoder/layers/pre_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0424 07:07:00.463280 137553131562816 maxtext_utils.py:1707]  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)
I0424 07:07:00.463332 137553131562816 maxtext_utils.py:1707]  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')
I0424 07:07:00.463371 137553131562816 maxtext_utils.py:1707]  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)
I0424 07:07:00.463407 137553131562816 maxtext_utils.py:1707]  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)
I0424 07:07:00.463453 137553131562816 maxtext_utils.py:1707]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)

I0424 07:07:00.463504 137553131562816 maxtext_utils.py:1707]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')
I0424 07:07:00.954437 137553131562816 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0424 07:07:00.954535 137553131562816 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0424 07:07:00.970328 137553131562816 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0424 07:07:00.970390 137553131562816 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0424 07:07:12.065423 137553131562816 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.
I0424 07:07:12.066236 137553131562816 metric_logger.py:301] number parameters: 1.104 billion
I0424 07:07:23.859223 137553131562816 checkpointing.py:772] Waiting for step 0 to finish before checkpoint...
I0424 07:07:24.011552 137553131562816 checkpointing.py:776] Waited 0.15230369567871094 seconds for step 0 to finish before starting checkpointing.
I0424 07:07:24.014088 137553131562816 checkpoint_manager.py:2009] [process=4][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0424 07:07:24.015724 137553131562816 checkpoint_manager.py:1512] [process=4] Saving checkpoint at step 0
I0424 07:07:24.017144 137553131562816 event_tracking.py:70] [process=4] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_02_synthetic/checkpoints/0.
I0424 07:07:24.337249 137553131562816 signaling_client.py:364] Using JaxDistributedSignalingClient
I0424 07:07:24.338145 137553131562816 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0424 07:07:24.338202 137553131562816 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
I0424 07:07:24.614850 137553131562816 base_pytree_checkpoint_handler.py:154] [process=4][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.277673s
I0424 07:07:24.615041 137553131562816 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/blocking_gbytes_per_sec: 5.446 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.2832348346710205 s) (per-host)
I0424 07:07:24.615102 137553131562816 base_pytree_checkpoint_handler.py:768] [process=4][thread=MainThread] Initiated Pytree async_save. Time taken: 0.283306s (batch_requests_ready=0.002261s, total_serialization_initiated=0.280966s, others=0.000079s)
I0424 07:07:24.615199 137553131562816 composite_checkpoint_handler.py:715] [process=4][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.287350s (all_items=0.000019s, per_item={'items': '0.00001860'}, temp_paths=0.287332)
I0424 07:07:24.616103 137553131562816 event_tracking.py:125] [process=4] [async] Finished blocking save in 0.60 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_02_synthetic/checkpoints/0.
I0424 07:07:24.616398 137423310993152 async_checkpointer.py:76] [process=4][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-24 07:27:24.616364
I0424 07:07:24.625404 137553131562816 checkpoint_manager.py:1560] [process=4][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0424 07:07:24.625674 137421123786496 async_checkpointer.py:280] [process=4][thread=save_finalize] Waiting for background save thread=async_save.
I0424 07:07:24.625800 137553131562816 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_02_synthetic/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777014444.0140674, 'wait_for_prev_duration_secs': 7.295608520507812e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777014444.0157673, 'checkpointer_blocking_duration_secs': 0.6008036136627197, 'get_old_steps_start_time': 1777014444.6165953, 'get_old_steps_duration_secs': 2.9802322387695312e-05, 'checkpoint_manager_blocking_start_time': 1777014444.0120878, 'checkpoint_manager_blocking_duration_secs': 0.6136713027954102}
I0424 07:07:24.625919 137553131562816 checkpointing.py:408] Started an asynchronous checkpoint save for step 0
I0424 07:07:24.625969 137553131562816 max_utils.py:750] 
Memstats: After params initialized:
I0424 07:07:24.626020 137553131562816 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_16(process=4,(0,4,0,0))
I0424 07:07:24.626053 137553131562816 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_17(process=4,(1,4,0,0))
I0424 07:07:24.626081 137553131562816 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_20(process=4,(0,5,0,0))
I0424 07:07:24.626107 137553131562816 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_21(process=4,(1,5,0,0))
I0424 07:07:24.940943 137553131562816 metric_logger.py:196] completed step: 0, seconds: 11.793, TFLOP/s/device: 1.152, Tokens/s/device: 173.664, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0424 07:07:25.110624 137553131562816 metric_logger.py:196] completed step: 1, seconds: 1.080, TFLOP/s/device: 12.580, Tokens/s/device: 1896.186, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0424 07:07:25.571206 137553131562816 metric_logger.py:196] completed step: 2, seconds: 0.023, TFLOP/s/device: 601.840, Tokens/s/device: 90715.804, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28637.129
I0424 07:07:25.718741 137553131562816 metric_logger.py:196] completed step: 3, seconds: 0.461, TFLOP/s/device: 29.490, Tokens/s/device: 4445.120, total_weights: 65536, loss: 9.734, lm_loss: 9.734, perplexity: 16889.203
I0424 07:07:26.013949 137553131562816 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.750, Tokens/s/device: 13377.315, total_weights: 65536, loss: 9.277, lm_loss: 9.277, perplexity: 10694.614
I0424 07:07:26.019676 137553131562816 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.145, Tokens/s/device: 13889.171, total_weights: 65536, loss: 8.892, lm_loss: 8.892, perplexity: 7270.717
I0424 07:07:28.185508    2844 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0424 07:07:30.200211 137421169620736 array_metadata_store.py:203] [process=4][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_02_synthetic/checkpoints/0/items/array_metadatas/process_4
I0424 07:07:47.554302 137553131562816 metric_logger.py:196] completed step: 6, seconds: 0.296, TFLOP/s/device: 45.963, Tokens/s/device: 6927.977, total_weights: 65536, loss: 8.592, lm_loss: 8.592, perplexity: 5390.759
I0424 07:07:47.701740 137553131562816 metric_logger.py:196] completed step: 7, seconds: 21.388, TFLOP/s/device: 0.635, Tokens/s/device: 95.755, total_weights: 65536, loss: 8.384, lm_loss: 8.384, perplexity: 4376.905
I0424 07:07:47.849061 137553131562816 metric_logger.py:196] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.134, Tokens/s/device: 13435.235, total_weights: 65536, loss: 8.255, lm_loss: 8.255, perplexity: 3846.406
I0424 07:07:47.995807 137553131562816 checkpointing.py:772] Waiting for step 9 to finish before checkpoint...
I0424 07:07:47.996528 137553131562816 checkpointing.py:776] Waited 0.0007421970367431641 seconds for step 9 to finish before starting checkpointing.
I0424 07:07:47.998631 137553131562816 checkpoint_manager.py:2020] [process=4][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0424 07:08:01.804610 137423310993152 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/gbytes_per_sec: 42.153 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 37.472769260406494 s) (per-host)
I0424 07:08:01.804717 137423310993152 async_checkpointer.py:90] [process=4][thread=async_save] 3 Handler Commit operations completed. Time taken: 37.188206s.
I0424 07:08:11.149462 137423310993152 async_checkpointer.py:160] [process=4][thread=async_save] Background save thread done. Time taken: 46.532933s.
I0424 07:08:11.149712 137421123786496 async_checkpointer.py:288] [process=4][thread=save_finalize] Done with waiting for background save thread=async_save.
I0424 07:08:11.149771 137421123786496 async_checkpointer.py:298] [process=4][thread=save_finalize] No errors found in background save thread=async_save.
I0424 07:08:11.149817 137421123786496 checkpoint_manager.py:2137] [process=4][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0424 07:08:11.152169 137421123786496 checkpoint_manager.py:2146] [process=4][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0424 07:08:11.152364 137553131562816 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.
W0424 07:08:11.152499 137553131562816 checkpoint_manager.py:1452] Waiting for previous save to complete took 23.153870 seconds. If this number is high, consider checkpointing less frequently.
I0424 07:08:11.154422 137553131562816 checkpoint_manager.py:1512] [process=4] Saving checkpoint at step 9
I0424 07:08:11.156492 137553131562816 event_tracking.py:70] [process=4] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_02_synthetic/checkpoints/9.
I0424 07:08:11.455297 137553131562816 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0424 07:08:11.455400 137553131562816 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
I0424 07:08:11.491614 137553131562816 base_pytree_checkpoint_handler.py:154] [process=4][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.037437s
I0424 07:08:11.491778 137553131562816 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/blocking_gbytes_per_sec: 37.656 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04096531867980957 s) (per-host)
I0424 07:08:11.491827 137553131562816 base_pytree_checkpoint_handler.py:768] [process=4][thread=MainThread] Initiated Pytree async_save. Time taken: 0.041025s (batch_requests_ready=0.001827s, total_serialization_initiated=0.039131s, others=0.000067s)
I0424 07:08:11.491934 137553131562816 composite_checkpoint_handler.py:715] [process=4][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.045086s (all_items=0.000014s, per_item={'items': '0.00001407'}, temp_paths=0.045072)
I0424 07:08:11.492634 137553131562816 event_tracking.py:125] [process=4] [async] Finished blocking save in 0.34 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_02_synthetic/checkpoints/9.
I0424 07:08:11.492959 137421123786496 async_checkpointer.py:76] [process=4][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-24 07:28:11.492925
I0424 07:08:11.494885 137553131562816 checkpoint_manager.py:1560] [process=4][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0424 07:08:11.495175 137399417956096 async_checkpointer.py:280] [process=4][thread=save_finalize] Waiting for background save thread=async_save.
I0424 07:08:11.495317 137553131562816 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_02_synthetic/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777014467.9986, 'wait_for_prev_duration_secs': 23.15386962890625, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777014491.154461, 'checkpointer_blocking_duration_secs': 0.3386404514312744, 'get_old_steps_start_time': 1777014491.4931264, 'get_old_steps_duration_secs': 3.123283386230469e-05, 'checkpoint_manager_blocking_start_time': 1777014467.996763, 'checkpoint_manager_blocking_duration_secs': 23.498518705368042}
I0424 07:08:11.495483 137553131562816 checkpointing.py:408] Started an asynchronous checkpoint save for step 9
I0424 07:08:11.495531 137553131562816 checkpoint_manager.py:2020] [process=4][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0424 07:08:16.626771 137421169620736 array_metadata_store.py:203] [process=4][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_02_synthetic/checkpoints/9/items/array_metadatas/process_4
I0424 07:08:53.273910 137421123786496 base_pytree_checkpoint_handler.py:130] [process=4] /jax/orbax/write/gbytes_per_sec: 37.769 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.82304573059082 s) (per-host)
I0424 07:08:53.274022 137421123786496 async_checkpointer.py:90] [process=4][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.780948s.
I0424 07:09:00.816888 137421123786496 async_checkpointer.py:160] [process=4][thread=async_save] Background save thread done. Time taken: 49.323776s.
I0424 07:09:00.817169 137399417956096 async_checkpointer.py:288] [process=4][thread=save_finalize] Done with waiting for background save thread=async_save.
I0424 07:09:00.817284 137399417956096 async_checkpointer.py:298] [process=4][thread=save_finalize] No errors found in background save thread=async_save.
I0424 07:09:00.817332 137399417956096 checkpoint_manager.py:2137] [process=4][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0424 07:09:00.819599 137399417956096 checkpoint_manager.py:2146] [process=4][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0424 07:09:00.819781 137553131562816 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.
I0424 07:09:00.819947 137553131562816 checkpoint_manager.py:2009] [process=4][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0424 07:09:00.820857 137553131562816 metric_logger.py:196] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.330, Tokens/s/device: 13917.014, 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: Fri Apr 24 07:09:10 UTC 2026
EXIT_CODE=0
feat/nnx-post-train-fixes  ·  28b1e4a16  ·  feat_nnx_post_train_fixes_20260424_120657  ·  full log 
XPK Start: Fri Apr 24 12:09:41 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. 
2026-04-24 12:10:06.012659: 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)
I0424 12:10:06.224476 132344083617600 max_utils.py:273] Attempting to initialize the jax distributed system...
I0424 12:10:15.265642 132344083617600 distributed.py:149] Starting JAX distributed service on [::]:8482
I0424 12:10:15.267908 132344083617600 distributed.py:172] Connecting to JAX distributed service on mt-02-synthetic-8ikpn-slice-job-0-0.mt-02-synthetic-8ikpn:8482
I0424 12:10:16.540572 132344083617600 max_utils.py:284] Jax distributed system initialized!
I0424 12:10:22.552057 132344083617600 max_utils.py:800] System Information: Jax Version: 0.9.2
I0424 12:10:22.552164 132344083617600 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0424 12:10:22.552205 132344083617600 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
I0424 12:10:22.552242 132344083617600 train_utils.py:391] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0424 12:10:23.254651 132344083617600 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0424 12:10:23.255228 132344083617600 maxtext_utils.py:1771] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0424 12:10:23.255408 132344083617600 checkpointing.py:688] Setting up checkpoint logger...
I0424 12:10:23.255470 132344083617600 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True
I0424 12:10:23.255513 132344083617600 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0424 12:10:23.255856 132344083617600 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 0x785d2111c1d0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0424 12:10:26.222076 132344083617600 checkpointing.py:266] Enabling policy for fixed interval checkpointing.
I0424 12:10:26.222310 132344083617600 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 0x7849043e6900>}, handler_registry=None
I0424 12:10:26.222557 132344083617600 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7849043e6900>` 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`.
I0424 12:10:26.222607 132344083617600 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7849043ea450>` 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`.
I0424 12:10:26.222648 132344083617600 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 0x7849043e6900>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7849043e6900>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7849043ea450>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7849043ea450>}).
I0424 12:10:26.222983 132344083617600 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0424 12:10:26.223054 132344083617600 async_checkpointer.py:192] [process=3][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x784904161e40> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0424 12:10:26.938407 132344083617600 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_02_synthetic/checkpoints
I0424 12:10:27.344661 132344083617600 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_post_train_fixes_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_02_synthetic/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7849043e7470>
I0424 12:10:27.344830 132344083617600 checkpointing.py:302] Checkpoint manager created!
I0424 12:10:28.306096 132344083617600 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0424 12:10:28.306206 132344083617600 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0424 12:10:28.686337 132344083617600 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0424 12:10:28.686445 132344083617600 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0424 12:10:28.703117 132344083617600 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0424 12:10:28.703181 132344083617600 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0424 12:10:28.727239 132344083617600 attentions.py:1154] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0424 12:10:28.727310 132344083617600 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0424 12:10:28.743999 132344083617600 attentions.py:1155] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0424 12:10:28.744060 132344083617600 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0424 12:10:28.760713 132344083617600 attentions.py:1156] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0424 12:10:28.760773 132344083617600 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0424 12:10:28.785713 132344083617600 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0424 12:10:28.785784 132344083617600 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0424 12:10:28.806864 132344083617600 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0424 12:10:28.806935 132344083617600 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0424 12:10:29.028918 132344083617600 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint
I0424 12:10:29.029029 132344083617600 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0424 12:10:30.479886 132344083617600 maxtext_utils.py:1880]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0424 12:10:30.480020 132344083617600 maxtext_utils.py:1880]  params/params/decoder/layers/mlp/wi_0/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0424 12:10:30.480073 132344083617600 maxtext_utils.py:1880]  params/params/decoder/layers/mlp/wi_1/kernel
    Shape:     float32[2048,16,7168]
    Logical:   P('embed', 'layers', 'mlp')
    Physical:  ('fsdp', None, None)
I0424 12:10:30.480131 132344083617600 maxtext_utils.py:1880]  params/params/decoder/layers/mlp/wo/kernel
    Shape:     float32[7168,16,2048]
    Logical:   P('mlp', 'layers', 'embed')
    Physical:  (None, None, 'fsdp')
I0424 12:10:30.480183 132344083617600 maxtext_utils.py:1880]  params/params/decoder/layers/post_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0424 12:10:30.480226 132344083617600 maxtext_utils.py:1880]  params/params/decoder/layers/pre_self_attention_layer_norm/scale
    Shape:     float32[2048,16]
    Logical:   P('norm', 'layers')
    Physical:  (None, None)
I0424 12:10:30.480278 132344083617600 maxtext_utils.py:1880]  params/params/decoder/layers/self_attention/key/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   P('embed', 'layers', 'kv_heads', 'kv_head_dim')
    Physical:  ('fsdp', None, None, None)
I0424 12:10:30.480329 132344083617600 maxtext_utils.py:1880]  params/params/decoder/layers/self_attention/out/kernel
    Shape:     float32[16,16,128,2048]
    Logical:   P('heads', 'layers', 'kv', 'embed')
    Physical:  (None, None, None, 'fsdp')
I0424 12:10:30.480368 132344083617600 maxtext_utils.py:1880]  params/params/decoder/layers/self_attention/query/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   P('embed', 'layers', 'q_heads', 'kv')
    Physical:  ('fsdp', None, None, None)
I0424 12:10:30.480404 132344083617600 maxtext_utils.py:1880]  params/params/decoder/layers/self_attention/value/kernel
    Shape:     float32[2048,16,16,128]
    Logical:   P('embed', 'layers', 'kv_heads', 'kv_head_dim')
    Physical:  ('fsdp', None, None, None)
I0424 12:10:30.480487 132344083617600 maxtext_utils.py:1880]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)
I0424 12:10:30.480542 132344083617600 maxtext_utils.py:1880]  params/params/token_embedder/embedding

    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')
I0424 12:10:30.980171 132344083617600 train.py:157] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0424 12:10:30.980266 132344083617600 train.py:157] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0424 12:10:30.995836 132344083617600 train.py:164] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0424 12:10:30.995897 132344083617600 train.py:164] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0424 12:10:41.729207 132344083617600 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.
I0424 12:10:41.730056 132344083617600 metric_logger.py:301] number parameters: 1.104 billion
I0424 12:10:52.986894 132344083617600 checkpointing.py:794] Waiting for step 0 to finish before checkpoint...
I0424 12:10:53.186244 132344083617600 checkpointing.py:798] Waited 0.19933462142944336 seconds for step 0 to finish before starting checkpointing.
I0424 12:10:53.189004 132344083617600 checkpoint_manager.py:2009] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0424 12:10:53.190798 132344083617600 checkpoint_manager.py:1512] [process=3] Saving checkpoint at step 0
I0424 12:10:53.192335 132344083617600 event_tracking.py:70] [process=3] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_02_synthetic/checkpoints/0.
I0424 12:10:53.484116 132344083617600 signaling_client.py:364] Using JaxDistributedSignalingClient
I0424 12:10:53.485121 132344083617600 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0424 12:10:53.485179 132344083617600 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
I0424 12:10:53.762128 132344083617600 base_pytree_checkpoint_handler.py:154] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.278086s
I0424 12:10:53.762301 132344083617600 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/blocking_gbytes_per_sec: 5.434 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28388547897338867 s) (per-host)
I0424 12:10:53.762351 132344083617600 base_pytree_checkpoint_handler.py:768] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.283946s (batch_requests_ready=0.002627s, total_serialization_initiated=0.281250s, others=0.000069s)
I0424 12:10:53.762454 132344083617600 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.288443s (all_items=0.000018s, per_item={'items': '0.00001836'}, temp_paths=0.288425)
I0424 12:10:53.763289 132344083617600 event_tracking.py:125] [process=3] [async] Finished blocking save in 0.57 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_02_synthetic/checkpoints/0.
I0424 12:10:53.763655 132215724144384 async_checkpointer.py:76] [process=3][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-24 12:30:53.763618
I0424 12:10:53.778823 132344083617600 checkpoint_manager.py:1560] [process=3][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0424 12:10:53.779137 132215153346304 async_checkpointer.py:280] [process=3][thread=save_finalize] Waiting for background save thread=async_save.
I0424 12:10:53.779294 132344083617600 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_02_synthetic/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777032653.1889858, 'wait_for_prev_duration_secs': 6.127357482910156e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777032653.190837, 'checkpointer_blocking_duration_secs': 0.5729751586914062, 'get_old_steps_start_time': 1777032653.7638395, 'get_old_steps_duration_secs': 2.765655517578125e-05, 'checkpoint_manager_blocking_start_time': 1777032653.1868088, 'checkpoint_manager_blocking_duration_secs': 0.5924475193023682}
I0424 12:10:53.779398 132344083617600 checkpointing.py:409] Started an asynchronous checkpoint save for step 0
I0424 12:10:53.779463 132344083617600 max_utils.py:750] 
Memstats: After params initialized:
I0424 12:10:53.779510 132344083617600 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_10(process=3,(2,2,0,0))
I0424 12:10:53.779543 132344083617600 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_11(process=3,(3,2,0,0))
I0424 12:10:53.779572 132344083617600 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_14(process=3,(2,3,0,0))
I0424 12:10:53.779595 132344083617600 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_15(process=3,(3,3,0,0))
I0424 12:10:54.092505 132344083617600 metric_logger.py:196] completed step: 0, seconds: 11.257, TFLOP/s/device: 1.207, Tokens/s/device: 181.936, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0424 12:10:54.263592 132344083617600 metric_logger.py:196] completed step: 1, seconds: 1.104, TFLOP/s/device: 12.306, Tokens/s/device: 1854.822, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0424 12:10:54.662268 132344083617600 metric_logger.py:196] completed step: 2, seconds: 0.023, TFLOP/s/device: 578.644, Tokens/s/device: 87219.454, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28637.129
I0424 12:10:54.809525 132344083617600 metric_logger.py:196] completed step: 3, seconds: 0.399, TFLOP/s/device: 34.049, Tokens/s/device: 5132.189, total_weights: 65536, loss: 9.734, lm_loss: 9.734, perplexity: 16889.203
I0424 12:10:55.104877 132344083617600 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.781, Tokens/s/device: 13382.035, total_weights: 65536, loss: 9.277, lm_loss: 9.277, perplexity: 10694.614
I0424 12:10:55.110613 132344083617600 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.174, Tokens/s/device: 13893.506, total_weights: 65536, loss: 8.892, lm_loss: 8.892, perplexity: 7270.717
I0424 12:10:57.122870    2804 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0424 12:10:59.353412 132215161739008 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_post_train_fixes_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_02_synthetic/checkpoints/0/items/array_metadatas/process_3
I0424 12:11:16.902386 132344083617600 metric_logger.py:196] completed step: 6, seconds: 0.296, TFLOP/s/device: 45.964, Tokens/s/device: 6928.188, total_weights: 65536, loss: 8.592, lm_loss: 8.592, perplexity: 5390.759
I0424 12:11:17.049710 132344083617600 metric_logger.py:196] completed step: 7, seconds: 21.644, TFLOP/s/device: 0.628, Tokens/s/device: 94.621, total_weights: 65536, loss: 8.384, lm_loss: 8.384, perplexity: 4376.905
I0424 12:11:17.197095 132344083617600 metric_logger.py:196] completed step: 8, seconds: 0.153, TFLOP/s/device: 88.874, Tokens/s/device: 13396.128, total_weights: 65536, loss: 8.255, lm_loss: 8.255, perplexity: 3846.406
I0424 12:11:17.343823 132344083617600 checkpointing.py:794] Waiting for step 9 to finish before checkpoint...
I0424 12:11:17.344488 132344083617600 checkpointing.py:798] Waited 0.0006859302520751953 seconds for step 9 to finish before starting checkpointing.
I0424 12:11:17.346527 132344083617600 checkpoint_manager.py:2020] [process=3][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0424 12:11:31.400663 132215724144384 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/gbytes_per_sec: 41.654 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 37.922210693359375 s) (per-host)
I0424 12:11:31.400785 132215724144384 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 37.637016s.
I0424 12:11:38.726879 132215724144384 async_checkpointer.py:160] [process=3][thread=async_save] Background save thread done. Time taken: 44.963080s.
I0424 12:11:38.727205 132215153346304 async_checkpointer.py:288] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save.
I0424 12:11:38.727325 132215153346304 async_checkpointer.py:298] [process=3][thread=save_finalize] No errors found in background save thread=async_save.
I0424 12:11:38.727383 132215153346304 checkpoint_manager.py:2137] [process=3][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0424 12:11:38.728920 132215153346304 checkpoint_manager.py:2146] [process=3][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0424 12:11:38.729127 132344083617600 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.
W0424 12:11:38.729268 132344083617600 checkpoint_manager.py:1452] Waiting for previous save to complete took 21.382741 seconds. If this number is high, consider checkpointing less frequently.
I0424 12:11:38.731104 132344083617600 checkpoint_manager.py:1512] [process=3] Saving checkpoint at step 9
I0424 12:11:38.733381 132344083617600 event_tracking.py:70] [process=3] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_02_synthetic/checkpoints/9.
I0424 12:11:39.283082 132344083617600 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0424 12:11:39.283174 132344083617600 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
I0424 12:11:39.323714 132344083617600 base_pytree_checkpoint_handler.py:154] [process=3][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.041506s
I0424 12:11:39.323877 132344083617600 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/blocking_gbytes_per_sec: 34.155 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.04516458511352539 s) (per-host)
I0424 12:11:39.323932 132344083617600 base_pytree_checkpoint_handler.py:768] [process=3][thread=MainThread] Initiated Pytree async_save. Time taken: 0.045222s (batch_requests_ready=0.001923s, total_serialization_initiated=0.043234s, others=0.000065s)
I0424 12:11:39.324019 132344083617600 composite_checkpoint_handler.py:715] [process=3][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.049594s (all_items=0.000015s, per_item={'items': '0.00001502'}, temp_paths=0.049579)
I0424 12:11:39.324710 132344083617600 event_tracking.py:125] [process=3] [async] Finished blocking save in 0.59 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_02_synthetic/checkpoints/9.
I0424 12:11:39.325063 132215153346304 async_checkpointer.py:76] [process=3][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-24 12:31:39.325026
I0424 12:11:39.326996 132344083617600 checkpoint_manager.py:1560] [process=3][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0424 12:11:39.327194 132193229719296 async_checkpointer.py:280] [process=3][thread=save_finalize] Waiting for background save thread=async_save.
I0424 12:11:39.327305 132344083617600 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_post_train_fixes_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_02_synthetic/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777032677.3464973, 'wait_for_prev_duration_secs': 21.382741451263428, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777032698.7311428, 'checkpointer_blocking_duration_secs': 0.5940582752227783, 'get_old_steps_start_time': 1777032699.3252242, 'get_old_steps_duration_secs': 2.765655517578125e-05, 'checkpoint_manager_blocking_start_time': 1777032677.344712, 'checkpoint_manager_blocking_duration_secs': 21.982558488845825}
I0424 12:11:39.327410 132344083617600 checkpointing.py:409] Started an asynchronous checkpoint save for step 9
I0424 12:11:39.327471 132344083617600 checkpoint_manager.py:2020] [process=3][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0424 12:11:44.513097 132215161739008 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_post_train_fixes_20260424_120657/linen_xpk_feat_nnx_post_train_fixes_20260424_120657_02_synthetic/checkpoints/9/items/array_metadatas/process_3
I0424 12:12:19.889492 132215153346304 base_pytree_checkpoint_handler.py:130] [process=3] /jax/orbax/write/gbytes_per_sec: 38.896 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 40.610745906829834 s) (per-host)
I0424 12:12:19.889599 132215153346304 async_checkpointer.py:90] [process=3][thread=async_save] 3 Handler Commit operations completed. Time taken: 40.564426s.
I0424 12:12:30.091538 132215153346304 async_checkpointer.py:160] [process=3][thread=async_save] Background save thread done. Time taken: 50.766350s.
I0424 12:12:30.091893 132193229719296 async_checkpointer.py:288] [process=3][thread=save_finalize] Done with waiting for background save thread=async_save.
I0424 12:12:30.091948 132193229719296 async_checkpointer.py:298] [process=3][thread=save_finalize] No errors found in background save thread=async_save.
I0424 12:12:30.091991 132193229719296 checkpoint_manager.py:2137] [process=3][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0424 12:12:30.093444 132193229719296 checkpoint_manager.py:2146] [process=3][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0424 12:12:30.093600 132344083617600 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.
I0424 12:12:30.093760 132344083617600 checkpoint_manager.py:2009] [process=3][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0424 12:12:30.094700 132344083617600 metric_logger.py:196] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.270, Tokens/s/device: 13907.941, 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: Fri Apr 24 12:12:41 UTC 2026
EXIT_CODE=0