MaxView

Timing Test Reference Updates
‹ —Case: 01_base02_synthetic ›

Metrics: main (b117f50cf) vs feat/nnx-set-defaults-true (73213e044)

Metricmain  b117f50cffeat/nnx-set-defaults-true  73213e044Diff (feat/nnx-set-defaults-true − main)
Parameters1.104 billion1.104 billion—
Final loss8.17908.17900
TFLOP/s92.13992.158+0.019
Tok/s13888.213891.1+2.826
Avg s/step2.6492.347-0.302
Memory %1.381.380
JAX0.9.20.8.1—

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

main  ·  b117f50cf  ·  main_20260424_070227  ·  full log 
XPK Start: Fri Apr 24 07:03:05 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 07:03:30.657283: 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 07:03:30.869002 139753873110848 max_utils.py:273] Attempting to initialize the jax distributed system...
I0424 07:03:39.908919 139753873110848 distributed.py:149] Starting JAX distributed service on [::]:8482
I0424 07:03:39.911244 139753873110848 distributed.py:172] Connecting to JAX distributed service on mt-01-base-03z8p-slice-job-0-0.mt-01-base-03z8p:8482
I0424 07:03:40.867149 139753873110848 max_utils.py:284] Jax distributed system initialized!
I0424 07:03:47.394468 139753873110848 max_utils.py:800] System Information: Jax Version: 0.9.2
I0424 07:03:47.394575 139753873110848 max_utils.py:801] System Information: Jaxlib Version: 0.9.2
I0424 07:03:47.394616 139753873110848 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 07:03:47.394671 139753873110848 train_utils.py:361] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0424 07:03:48.088459 139753873110848 maxtext_utils.py:1604] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0424 07:03:48.088745 139753873110848 checkpointing.py:677] Setting up checkpoint logger...
I0424 07:03:48.088799 139753873110848 checkpointing.py:233] Creating checkpoint manager with ocdbt=True and zarr3=True
I0424 07:03:48.088844 139753873110848 pytree_checkpoint_handler.py:592] save_device_host_concurrent_bytes=None
I0424 07:03:48.089180 139753873110848 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 0x7f1a6abe9fd0>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0424 07:03:52.038155 139753873110848 checkpointing.py:265] Enabling policy for fixed interval checkpointing.
I0424 07:03:52.038386 139753873110848 checkpoint_manager.py:708] [process=5][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7f060850dc10>}, handler_registry=None
I0424 07:03:52.038621 139753873110848 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7f060850dc10>` 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 07:03:52.038685 139753873110848 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7f060866bfb0>` 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 07:03:52.038722 139753873110848 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 0x7f060850dc10>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7f060850dc10>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7f060866bfb0>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7f060866bfb0>}).
I0424 07:03:52.039054 139753873110848 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.34
I0424 07:03:52.039124 139753873110848 async_checkpointer.py:192] [process=5][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7f06082ad9e0> timeout: 1200 secs and primary_host=0 for async checkpoint writes
I0424 07:03:53.311888 139753873110848 checkpoint_manager.py:1812] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_01_base/checkpoints
I0424 07:03:53.319088 139753873110848 checkpoint_manager.py:929] [process=5][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_01_base/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7f060850c1a0>
I0424 07:03:53.319210 139753873110848 checkpointing.py:301] Checkpoint manager created!
I0424 07:03:54.238256 139753873110848 nnx_wrappers.py:437] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0424 07:03:54.238378 139753873110848 nnx_wrappers.py:437] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0424 07:03:54.619390 139753873110848 attentions.py:1088] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0424 07:03:54.619480 139753873110848 attentions.py:1088] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0424 07:03:54.635864 139753873110848 attentions.py:1089] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0424 07:03:54.635925 139753873110848 attentions.py:1089] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0424 07:03:54.660033 139753873110848 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 07:03:54.660105 139753873110848 attentions.py:1154] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0424 07:03:54.676564 139753873110848 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 07:03:54.676623 139753873110848 attentions.py:1155] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0424 07:03:54.693101 139753873110848 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 07:03:54.693160 139753873110848 attentions.py:1156] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0424 07:03:54.718147 139753873110848 attentions.py:1198] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0424 07:03:54.718216 139753873110848 attentions.py:1198] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0424 07:03:54.739634 139753873110848 linears.py:525] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0424 07:03:54.739719 139753873110848 linears.py:525] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0424 07:03:54.948843 139753873110848 checkpointing.py:577] checkpoint manager exists so trying to load this run's existing checkpoint
I0424 07:03:54.948954 139753873110848 checkpointing.py:665] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0424 07:03:56.373929 139753873110848 maxtext_utils.py:1707]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   P('norm',)
    Physical:  (None,)
I0424 07:03:56.374059 139753873110848 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 07:03:56.374113 139753873110848 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 07:03:56.374172 139753873110848 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 07:03:56.374224 139753873110848 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 07:03:56.374261 139753873110848 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 07:03:56.374310 139753873110848 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 07:03:56.374359 139753873110848 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 07:03:56.374398 139753873110848 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 07:03:56.374433 139753873110848 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 07:03:56.374478 139753873110848 maxtext_utils.py:1707]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   P('embed_vocab', 'vocab')
    Physical:  ('fsdp', None)
I0424 07:03:56.374525 139753873110848 maxtext_utils.py:1707]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   P('vocab', 'embed_vocab')
    Physical:  (None, 'fsdp')
I0424 07:03:56.862996 139753873110848 train.py:155] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0424 07:03:56.863083 139753873110848 train.py:155] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0424 07:03:56.878591 139753873110848 train.py:162] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0424 07:03:56.878667 139753873110848 train.py:162] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0424 07:04:07.697839 139753873110848 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 07:04:07.698580 139753873110848 metric_logger.py:301] number parameters: 1.104 billion
I0424 07:04:19.097150 139753873110848 checkpointing.py:772] Waiting for step 0 to finish before checkpoint...
I0424 07:04:19.249784 139753873110848 checkpointing.py:776] Waited 0.15261363983154297 seconds for step 0 to finish before starting checkpointing.
I0424 07:04:19.252031 139753873110848 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0424 07:04:19.253644 139753873110848 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 0
I0424 07:04:19.255588 139753873110848 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_01_base/checkpoints/0.
I0424 07:04:19.580963 139753873110848 signaling_client.py:364] Using JaxDistributedSignalingClient
I0424 07:04:19.581913 139753873110848 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0424 07:04:19.581975 139753873110848 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 07:04:19.859895 139753873110848 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.279007s
I0424 07:04:19.860074 139753873110848 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 5.421 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.28455591201782227 s) (per-host)
I0424 07:04:19.860144 139753873110848 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.284632s (batch_requests_ready=0.002249s, total_serialization_initiated=0.282300s, others=0.000083s)
I0424 07:04:19.860269 139753873110848 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.288972s (all_items=0.000018s, per_item={'items': '0.00001788'}, temp_paths=0.288954)
I0424 07:04:19.862314 139753873110848 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.61 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_01_base/checkpoints/0.
I0424 07:04:19.862671 139624907171584 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-24 07:24:19.862619
I0424 07:04:19.866681 139753873110848 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0424 07:04:19.866984 139623631783680 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save.
I0424 07:04:19.867141 139753873110848 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_01_base/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777014259.2520132, 'wait_for_prev_duration_secs': 6.008148193359375e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777014259.253698, 'checkpointer_blocking_duration_secs': 0.6091272830963135, 'get_old_steps_start_time': 1777014259.8628514, 'get_old_steps_duration_secs': 3.0994415283203125e-05, 'checkpoint_manager_blocking_start_time': 1777014259.250202, 'checkpoint_manager_blocking_duration_secs': 0.6168999671936035}
I0424 07:04:19.867247 139753873110848 checkpointing.py:408] Started an asynchronous checkpoint save for step 0
I0424 07:04:19.867300 139753873110848 max_utils.py:750] 
Memstats: After params initialized:
I0424 07:04:19.867347 139753873110848 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_18(process=5,(2,4,0,0))
I0424 07:04:19.867380 139753873110848 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_19(process=5,(3,4,0,0))
I0424 07:04:19.867408 139753873110848 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_22(process=5,(2,5,0,0))
I0424 07:04:19.867434 139753873110848 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_23(process=5,(3,5,0,0))
I0424 07:04:20.176811 139753873110848 metric_logger.py:196] completed step: 0, seconds: 11.398, TFLOP/s/device: 1.192, Tokens/s/device: 179.673, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0424 07:04:20.352935 139753873110848 metric_logger.py:196] completed step: 1, seconds: 1.078, TFLOP/s/device: 12.604, Tokens/s/device: 1899.770, total_weights: 65536, loss: 10.874, lm_loss: 10.874, perplexity: 52779.875
I0424 07:04:20.764144 139753873110848 metric_logger.py:196] completed step: 2, seconds: 0.029, TFLOP/s/device: 466.063, Tokens/s/device: 70250.060, total_weights: 65536, loss: 10.262, lm_loss: 10.262, perplexity: 28637.129
I0424 07:04:20.911367 139753873110848 metric_logger.py:196] completed step: 3, seconds: 0.411, TFLOP/s/device: 33.041, Tokens/s/device: 4980.242, total_weights: 65536, loss: 9.734, lm_loss: 9.734, perplexity: 16889.203
I0424 07:04:21.206738 139753873110848 metric_logger.py:196] completed step: 4, seconds: 0.153, TFLOP/s/device: 88.876, Tokens/s/device: 13396.391, total_weights: 65536, loss: 9.277, lm_loss: 9.277, perplexity: 10694.614
I0424 07:04:21.212270 139753873110848 metric_logger.py:196] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.214, Tokens/s/device: 13899.446, total_weights: 65536, loss: 8.892, lm_loss: 8.892, perplexity: 7270.717
I0424 07:04:22.958622    2840 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0424 07:04:24.965563 139623772800768 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_01_base/checkpoints/0/items/array_metadatas/process_5
I0424 07:04:42.788391 139753873110848 metric_logger.py:196] completed step: 6, seconds: 0.295, TFLOP/s/device: 45.982, Tokens/s/device: 6930.884, total_weights: 65536, loss: 8.592, lm_loss: 8.592, perplexity: 5390.759
I0424 07:04:42.935832 139753873110848 metric_logger.py:196] completed step: 7, seconds: 21.429, TFLOP/s/device: 0.634, Tokens/s/device: 95.569, total_weights: 65536, loss: 8.384, lm_loss: 8.384, perplexity: 4376.905
I0424 07:04:43.083140 139753873110848 metric_logger.py:196] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.374, Tokens/s/device: 13471.469, total_weights: 65536, loss: 8.255, lm_loss: 8.255, perplexity: 3846.406
I0424 07:04:43.229713 139753873110848 checkpointing.py:772] Waiting for step 9 to finish before checkpoint...
I0424 07:04:43.230300 139753873110848 checkpointing.py:776] Waited 0.0006082057952880859 seconds for step 9 to finish before starting checkpointing.
I0424 07:04:43.232429 139753873110848 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0424 07:04:57.577780 139624907171584 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 41.566 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 38.00222325325012 s) (per-host)
I0424 07:04:57.577902 139624907171584 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 37.715115s.
I0424 07:05:04.738688 139624907171584 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 44.875866s.
I0424 07:05:04.738976 139623631783680 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save.
I0424 07:05:04.739099 139623631783680 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save.
I0424 07:05:04.739150 139623631783680 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0424 07:05:04.741672 139623631783680 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0424 07:05:04.741845 139753873110848 checkpoint_manager.py:2032] [process=5][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0424 07:05:04.741989 139753873110848 checkpoint_manager.py:1452] Waiting for previous save to complete took 21.509558 seconds. If this number is high, consider checkpointing less frequently.
I0424 07:05:04.744000 139753873110848 checkpoint_manager.py:1512] [process=5] Saving checkpoint at step 9
I0424 07:05:04.745966 139753873110848 event_tracking.py:70] [process=5] [async] Started save checkpoint @ gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_01_base/checkpoints/9.
I0424 07:05:05.046016 139753873110848 jax_array_handlers.py:360] Scheduling D2H of 39 prioritized jax.Array.
I0424 07:05:05.046113 139753873110848 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 07:05:05.080097 139753873110848 base_pytree_checkpoint_handler.py:154] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.035293s
I0424 07:05:05.080270 139753873110848 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/blocking_gbytes_per_sec: 39.763 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.038794517517089844 s) (per-host)
I0424 07:05:05.080324 139753873110848 base_pytree_checkpoint_handler.py:768] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.038858s (batch_requests_ready=0.001811s, total_serialization_initiated=0.036973s, others=0.000074s)
I0424 07:05:05.080425 139753873110848 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.043503s (all_items=0.000016s, per_item={'items': '0.00001645'}, temp_paths=0.043486)
I0424 07:05:05.081138 139753873110848 event_tracking.py:125] [process=5] [async] Finished blocking save in 0.34 seconds. Continuing save @ gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_01_base/checkpoints/9.
I0424 07:05:05.081471 139623631783680 async_checkpointer.py:76] [process=5][thread=async_save] Background save thread started. Deadline for this save operation is 2026-04-24 07:25:05.081433
I0424 07:05:05.083455 139753873110848 checkpoint_manager.py:1560] [process=5][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0424 07:05:05.083796 139603281442560 async_checkpointer.py:280] [process=5][thread=save_finalize] Waiting for background save thread=async_save.
I0424 07:05:05.083961 139753873110848 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_01_base/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777014283.2323983, 'wait_for_prev_duration_secs': 21.50955843925476, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777014304.7440405, 'checkpointer_blocking_duration_secs': 0.337566614151001, 'get_old_steps_start_time': 1777014305.081633, 'get_old_steps_duration_secs': 5.14984130859375e-05, 'checkpoint_manager_blocking_start_time': 1777014283.2305334, 'checkpoint_manager_blocking_duration_secs': 21.853387355804443}
I0424 07:05:05.084072 139753873110848 checkpointing.py:408] Started an asynchronous checkpoint save for step 9
I0424 07:05:05.084118 139753873110848 checkpoint_manager.py:2020] [process=5][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0424 07:05:10.379786 139623772800768 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_main_20260424_070227/linen_xpk_main_20260424_070227_01_base/checkpoints/9/items/array_metadatas/process_5
I0424 07:05:47.149814 139623631783680 base_pytree_checkpoint_handler.py:130] [process=5] /jax/orbax/write/gbytes_per_sec: 37.513 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 42.10829472541809 s) (per-host)
I0424 07:05:47.149944 139623631783680 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 42.068363s.
I0424 07:05:54.428929 139623631783680 async_checkpointer.py:160] [process=5][thread=async_save] Background save thread done. Time taken: 49.347331s.
I0424 07:05:54.429230 139603281442560 async_checkpointer.py:288] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save.
I0424 07:05:54.429345 139603281442560 async_checkpointer.py:298] [process=5][thread=save_finalize] No errors found in background save thread=async_save.
I0424 07:05:54.429395 139603281442560 checkpoint_manager.py:2137] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0424 07:05:54.430986 139603281442560 checkpoint_manager.py:2146] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0424 07:05:54.431162 139753873110848 checkpoint_manager.py:2032] [process=5][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0424 07:05:54.431307 139753873110848 checkpoint_manager.py:2009] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0424 07:05:54.432125 139753873110848 metric_logger.py:196] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.139, Tokens/s/device: 13888.230, 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 07:06:06 UTC 2026
EXIT_CODE=0
feat/nnx-set-defaults-true  ·  73213e044  ·  feat_nnx_set_defaults_true_20260424_145744  ·  full log 
XPK Start: Fri Apr 24 14:58:21 UTC 2026
2026-04-24 14:58:25.432427: 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 00:00:1777042705.445241      10 cuda_dnn.cc:8579] Unable to register cuDNN factory: Attempting to register factory for plugin cuDNN when one has already been registered
E0000 00:00:1777042705.449009      10 cuda_blas.cc:1407] Unable to register cuBLAS factory: Attempting to register factory for plugin cuBLAS when one has already been registered
W0000 00:00:1777042705.460278      10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1777042705.460296      10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1777042705.460298      10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
W0000 00:00:1777042705.460300      10 computation_placer.cc:177] computation placer already registered. Please check linkage and avoid linking the same target more than once.
2026-04-24 14:58:44.599068: 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 14:58:45.122118 139543169230656 max_utils.py:273] Attempting to initialize the jax distributed system...
INFO:2026-04-24 14:58:54,162:jax._src.distributed:140: Starting JAX distributed service on [::]:8482
I0424 14:58:54.162940 139543169230656 distributed.py:140] Starting JAX distributed service on [::]:8482
INFO:2026-04-24 14:58:54,165:jax._src.distributed:157: Connecting to JAX distributed service on mt-01-base-8ah2w-slice-job-0-0.mt-01-base-8ah2w:8482
I0424 14:58:54.165254 139543169230656 distributed.py:157] Connecting to JAX distributed service on mt-01-base-8ah2w-slice-job-0-0.mt-01-base-8ah2w:8482
I0424 14:58:55.603101 139543169230656 max_utils.py:284] Jax distributed system initialized!
I0424 14:59:02.645855 139543169230656 max_utils.py:800] System Information: Jax Version: 0.8.1
I0424 14:59:02.645963 139543169230656 max_utils.py:801] System Information: Jaxlib Version: 0.8.1
I0424 14:59:02.646005 139543169230656 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
I0424 14:59:02.646039 139543169230656 train_utils.py:377] WARNING: Sequence packing is essentially ignored for synthetic data. Please use a real dataset to use sequence packing.
I0424 14:59:03.263400 139543169230656 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0424 14:59:03.264006 139543169230656 maxtext_utils.py:1631] Num_devices: 32, shape (1, 1, 1, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1)
I0424 14:59:03.264197 139543169230656 checkpointing.py:688] Setting up checkpoint logger...
I0424 14:59:03.264248 139543169230656 checkpointing.py:234] Creating checkpoint manager with ocdbt=True and zarr3=True
I0424 14:59:03.264291 139543169230656 pytree_checkpoint_handler.py:589] save_device_host_concurrent_bytes=None
I0424 14:59:03.264660 139543169230656 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 0x7ee963b4dc10>, enable_pinned_host_transfer=False, save_concurrent_bytes: 96000000000 (89.4 GiB), restore_concurrent_bytes: 96000000000 (89.4 GiB)
I0424 14:59:07.048093 139543169230656 checkpointing.py:266] Enabling policy for fixed interval checkpointing.
I0424 14:59:07.048440 139543169230656 checkpoint_manager.py:709] [process=5][thread=MainThread] CheckpointManager init: checkpointers=None, item_names=('items',), item_handlers={'items': <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ed4d0349580>}, handler_registry=None
I0424 14:59:07.048688 139543169230656 composite_checkpoint_handler.py:237] Deferred registration for item: "items". Adding handler `<orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ed4d0349580>` 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 14:59:07.048738 139543169230656 composite_checkpoint_handler.py:237] Deferred registration for item: "metrics". Adding handler `<orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ed4d034e300>` 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 14:59:07.048774 139543169230656 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 0x7ed4d0349580>, ('items', <class 'orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeRestoreArgs'>): <orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler object at 0x7ed4d0349580>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonSaveArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ed4d034e300>, ('metrics', <class 'orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonRestoreArgs'>): <orbax.checkpoint._src.handlers.json_checkpoint_handler.JsonCheckpointHandler object at 0x7ed4d034e300>}).
I0424 14:59:07.049295 139543169230656 abstract_checkpointer.py:35] orbax-checkpoint version: 0.11.33
I0424 14:59:07.049376 139543169230656 async_checkpointer.py:177] [process=5][thread=MainThread] Using barrier_sync_fn: <function get_barrier_sync_fn.<locals>._fn at 0x7ed4b82b8180> timeout: 600 secs and primary_host=0 for async checkpoint writes
I0424 14:59:07.929190 139543169230656 checkpoint_manager.py:1818] Found 0 checkpoint steps in gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/linen_xpk_feat_nnx_set_defaults_true_20260424_145744_01_base/checkpoints
I0424 14:59:08.189613 139543169230656 checkpoint_manager.py:929] [process=5][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_20260424_145744/linen_xpk_feat_nnx_set_defaults_true_20260424_145744_01_base/checkpoints: <orbax.checkpoint.checkpoint_manager.CheckpointManager object at 0x7ed4d034e5a0>
I0424 14:59:08.189815 139543169230656 checkpointing.py:302] Checkpoint manager created!
I0424 14:59:09.083861 139543169230656 nnx_wrappers.py:455] Unknown Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_norm_length', 'activation_embed').
I0424 14:59:09.083965 139543169230656 nnx_wrappers.py:455] Unknown Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0424 14:59:09.455369 139543169230656 attentions.py:1084] attentions/inputs_q Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0424 14:59:09.455464 139543169230656 attentions.py:1084] attentions/inputs_q Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0424 14:59:09.471327 139543169230656 attentions.py:1085] attentions/inputs_kv Logical: bfloat16[32,2048,2048]...................................... ('activation_batch', 'activation_attn_length', 'activation_attn_embed').
I0424 14:59:09.471391 139543169230656 attentions.py:1085] attentions/inputs_kv Physical: bfloat16[32,2048,2048]...................................... ('fsdp', None, None).
I0424 14:59:09.494197 139543169230656 attentions.py:1150] attentions/query Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0424 14:59:09.494269 139543169230656 attentions.py:1150] attentions/query Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0424 14:59:09.510301 139543169230656 attentions.py:1151] attentions/key Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0424 14:59:09.510364 139543169230656 attentions.py:1151] attentions/key Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0424 14:59:09.526245 139543169230656 attentions.py:1152] attentions/value Logical: bfloat16[32,2048,16,128].................................... ('activation_kv_batch', 'activation_attn_length', 'activation_kv_heads', 'activation_kv_head_dim').
I0424 14:59:09.526306 139543169230656 attentions.py:1152] attentions/value Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0424 14:59:09.551008 139543169230656 attentions.py:1193] attentions/out Logical: bfloat16[32,2048,16,128].................................... ('activation_batch', 'activation_attn_length', 'activation_heads', 'activation_kv').
I0424 14:59:09.551076 139543169230656 attentions.py:1193] attentions/out Physical: bfloat16[32,2048,16,128].................................... ('fsdp', None, None, None).
I0424 14:59:09.570612 139543169230656 linears.py:541] linears/x Logical: bfloat16[32,2048,7168]...................................... ('activation_batch', 'activation_length', 'activation_mlp').
I0424 14:59:09.570692 139543169230656 linears.py:541] linears/x Physical: bfloat16[32,2048,7168]...................................... ('fsdp', None, None).
I0424 14:59:09.762631 139543169230656 checkpointing.py:578] checkpoint manager exists so trying to load this run's existing checkpoint
I0424 14:59:09.762749 139543169230656 checkpointing.py:676] No existing checkpoints found, not restoring checkpoint.
fsdp: 32
I0424 14:59:11.209847 139543169230656 maxtext_utils.py:1740]  params/params/decoder/decoder_norm/scale
    Shape:     float32[2048]
    Logical:   PartitionSpec('norm',)
    Physical:  (None,)
I0424 14:59:11.209974 139543169230656 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)
I0424 14:59:11.210035 139543169230656 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)
I0424 14:59:11.210096 139543169230656 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')
I0424 14:59:11.210152 139543169230656 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)
I0424 14:59:11.210191 139543169230656 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)
I0424 14:59:11.210244 139543169230656 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)
I0424 14:59:11.210297 139543169230656 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')
I0424 14:59:11.210336 139543169230656 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)
I0424 14:59:11.210373 139543169230656 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)
I0424 14:59:11.210422 139543169230656 maxtext_utils.py:1740]  params/params/decoder/logits_dense/kernel
    Shape:     float32[2048,32000]
    Logical:   PartitionSpec('embed', 'vocab')
    Physical:  ('fsdp', None)

I0424 14:59:11.210470 139543169230656 maxtext_utils.py:1740]  params/params/token_embedder/embedding
    Shape:     float32[32000,2048]
    Logical:   PartitionSpec('vocab', 'embed')
    Physical:  (None, 'fsdp')
I0424 14:59:11.709036 139543169230656 train.py:158] train/xent Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0424 14:59:11.709129 139543169230656 train.py:158] train/xent Physical: float32[32,2048]............................................ ('fsdp', None).
I0424 14:59:11.724051 139543169230656 train.py:165] train/z_loss Logical: float32[32,2048]............................................ ('activation_embed_and_logits_batch', 'activation_length').
I0424 14:59:11.724105 139543169230656 train.py:165] train/z_loss Physical: float32[32,2048]............................................ ('fsdp', None).
I0424 14:59:22.452657 139543169230656 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 14:59:22.453560 139543169230656 metric_logger.py:289] number parameters: 1.104 billion
I0424 14:59:33.569235 139543169230656 checkpointing.py:794] Waiting for step 0 to finish before checkpoint...
I0424 14:59:33.728039 139543169230656 checkpointing.py:798] Waited 0.1587843894958496 seconds for step 0 to finish before starting checkpointing.
I0424 14:59:33.730541 139543169230656 checkpoint_manager.py:2013] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0424 14:59:33.732290 139543169230656 checkpoint_manager.py:1518] [process=5] Saving checkpoint at step 0
I0424 14:59:33.735033 139543169230656 async_checkpointer.py:452] [process=5] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/linen_xpk_feat_nnx_set_defaults_true_20260424_145744_01_base/checkpoints/0.
I0424 14:59:34.503138 139543169230656 signaling_client.py:364] Using JaxDistributedSignalingClient
I0424 14:59:34.504190 139543169230656 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array.
I0424 14:59:34.504252 139543169230656 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 14:59:34.752350 139543169230656 base_pytree_checkpoint_handler.py:153] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.249294s
I0424 14:59:34.752523 139543169230656 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/blocking_gbytes_per_sec: 3.030 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.5090720653533936 s) (per-host)
I0424 14:59:34.752576 139543169230656 base_pytree_checkpoint_handler.py:737] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.509137s (batch_requests_ready=0.256173s, total_serialization_initiated=0.252890s, others=0.000074s)
I0424 14:59:34.752680 139543169230656 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.513377s (all_items=0.000020s, per_item={'items': '0.00002003'}, temp_paths=0.513357)
I0424 14:59:34.753600 139415435339520 async_checkpointer.py:79] [process=5][thread=async_save] Background save thread started.
I0424 14:59:34.753777 139543169230656 async_checkpointer.py:561] Finished blocking save. Time taken: 1.021419s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/linen_xpk_feat_nnx_set_defaults_true_20260424_145744_01_base/checkpoints/0.
I0424 14:59:34.808055 139543169230656 checkpoint_manager.py:1566] [process=5][thread=MainThread][step=0] Starting CheckpointManager Save Finalize thread=save_finalize
I0424 14:59:34.808365 139414797788928 async_checkpointer.py:265] [process=5][thread=save_finalize] Waiting for background save thread=async_save.
I0424 14:59:34.808512 139543169230656 standard_logger.py:34] {'step': 0, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/linen_xpk_feat_nnx_set_defaults_true_20260424_145744_01_base/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777042773.7305224, 'wait_for_prev_duration_secs': 6.580352783203125e-05, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777042773.732329, 'checkpointer_blocking_duration_secs': 1.0215535163879395, 'get_old_steps_start_time': 1777042774.7539046, 'get_old_steps_duration_secs': 2.3603439331054688e-05, 'checkpoint_manager_blocking_start_time': 1777042773.7285812, 'checkpoint_manager_blocking_duration_secs': 1.079890251159668}
I0424 14:59:34.808619 139543169230656 checkpointing.py:409] Started an asynchronous checkpoint save for step 0
I0424 14:59:34.808685 139543169230656 max_utils.py:750] 
Memstats: After params initialized:
I0424 14:59:34.808740 139543169230656 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_18(process=5,(2,4,0,0))
I0424 14:59:34.808777 139543169230656 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_19(process=5,(3,4,0,0))
I0424 14:59:34.808805 139543169230656 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_22(process=5,(2,5,0,0))
I0424 14:59:34.808830 139543169230656 max_utils.py:756] 	Using (GB) 0.43 / 31.25 (1.376000%) on TPU_23(process=5,(3,5,0,0))
I0424 14:59:35.073723 139543169230656 metric_logger.py:185] completed step: 0, seconds: 11.116, TFLOP/s/device: 1.222, Tokens/s/device: 184.246, total_weights: 65536, loss: 10.874
I0424 14:59:35.246284 139543169230656 metric_logger.py:185] completed step: 1, seconds: 1.503, TFLOP/s/device: 9.039, Tokens/s/device: 1362.476, total_weights: 65536, loss: 10.874
I0424 14:59:35.633995 139543169230656 metric_logger.py:185] completed step: 2, seconds: 0.025, TFLOP/s/device: 534.905, Tokens/s/device: 80626.747, total_weights: 65536, loss: 10.263
I0424 14:59:35.781360 139543169230656 metric_logger.py:185] completed step: 3, seconds: 0.388, TFLOP/s/device: 35.013, Tokens/s/device: 5277.480, total_weights: 65536, loss: 9.734
I0424 14:59:36.076925 139543169230656 metric_logger.py:185] completed step: 4, seconds: 0.153, TFLOP/s/device: 89.005, Tokens/s/device: 13415.785, total_weights: 65536, loss: 9.278
I0424 14:59:36.082576 139543169230656 metric_logger.py:185] completed step: 5, seconds: 0.147, TFLOP/s/device: 92.273, Tokens/s/device: 13908.414, total_weights: 65536, loss: 8.892
I0424 14:59:54.545460 139543169230656 metric_logger.py:185] completed step: 6, seconds: 0.296, TFLOP/s/device: 45.897, Tokens/s/device: 6918.124, total_weights: 65536, loss: 8.592
I0424 14:59:54.692885 139543169230656 metric_logger.py:185] completed step: 7, seconds: 18.316, TFLOP/s/device: 0.742, Tokens/s/device: 111.815, total_weights: 65536, loss: 8.384
I0424 14:59:54.840260 139543169230656 metric_logger.py:185] completed step: 8, seconds: 0.152, TFLOP/s/device: 89.276, Tokens/s/device: 13456.598, total_weights: 65536, loss: 8.255
I0424 14:59:54.987380 139543169230656 checkpointing.py:794] Waiting for step 9 to finish before checkpoint...
I0424 14:59:54.988053 139543169230656 checkpointing.py:798] Waited 0.0006933212280273438 seconds for step 9 to finish before starting checkpointing.
I0424 14:59:54.990210 139543169230656 checkpoint_manager.py:2024] [process=5][thread=MainThread][step=0][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0424 14:59:55.663399    2689 google_auth_provider.cc:181] Running on GCE, using service account 562977990677-compute@developer.gserviceaccount.com
I0424 14:59:57.625800 139415443732224 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/linen_xpk_feat_nnx_set_defaults_true_20260424_145744_01_base/checkpoints/0/items/array_metadatas/process_5
I0424 15:00:28.885317 139415435339520 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/gbytes_per_sec: 28.908 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 54.64182448387146 s) (per-host)
I0424 15:00:28.885431 139415435339520 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 54.131709s.
I0424 15:00:37.566341 139415435339520 async_checkpointer.py:144] [process=5][thread=async_save] Background save thread done. Time taken: 62.812602s.
I0424 15:00:37.566560 139414797788928 async_checkpointer.py:273] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save.
I0424 15:00:37.566640 139414797788928 async_checkpointer.py:283] [process=5][thread=save_finalize] No errors found in background save thread=async_save.
I0424 15:00:37.566744 139414797788928 checkpoint_manager.py:2133] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is syncing with other hosts...
I0424 15:00:37.568264 139414797788928 checkpoint_manager.py:2142] [process=5][thread=save_finalize][step=0] CheckpointManager Save Finalize is done on all hosts.
I0424 15:00:37.568458 139543169230656 checkpoint_manager.py:2036] [process=5][thread=MainThread][step=0][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=0.
W0424 15:00:37.568603 139543169230656 checkpoint_manager.py:1458] Waiting for previous save to complete took 42.578396 seconds. If this number is high, consider checkpointing less frequently.
I0424 15:00:37.570404 139543169230656 checkpoint_manager.py:1518] [process=5] Saving checkpoint at step 9
I0424 15:00:37.573742 139543169230656 async_checkpointer.py:452] [process=5] Started async saving checkpoint to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/linen_xpk_feat_nnx_set_defaults_true_20260424_145744_01_base/checkpoints/9.
I0424 15:00:38.125104 139543169230656 jax_array_handlers.py:358] Scheduling D2H of 39 prioritized jax.Array.
I0424 15:00:38.125203 139543169230656 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 15:00:38.168919 139543169230656 base_pytree_checkpoint_handler.py:153] [process=5][thread=MainThread] Initiated "orbax.checkpoint._src.serialization.jax_array_handlers.ArrayHandler".serialize. Time taken: 0.045240s
I0424 15:00:38.169098 139543169230656 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/blocking_gbytes_per_sec: 5.271 GiB/s (total gbytes: 1.5 GiB) (time elapsed: 0.29263806343078613 s) (per-host)
I0424 15:00:38.169151 139543169230656 base_pytree_checkpoint_handler.py:737] [process=5][thread=MainThread] Initiated Pytree async_save. Time taken: 0.292701s (batch_requests_ready=0.245536s, total_serialization_initiated=0.047093s, others=0.000072s)
I0424 15:00:38.169243 139543169230656 composite_checkpoint_handler.py:715] [process=5][thread=MainThread] Initiated CompositeCheckpointHandler.async_save. Time taken: 0.296667s (all_items=0.000016s, per_item={'items': '0.00001574'}, temp_paths=0.296651)
I0424 15:00:38.170091 139415393376000 async_checkpointer.py:79] [process=5][thread=async_save] Background save thread started.
I0424 15:00:38.170255 139543169230656 async_checkpointer.py:561] Finished blocking save. Time taken: 0.599780s. Continuing background save to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/linen_xpk_feat_nnx_set_defaults_true_20260424_145744_01_base/checkpoints/9.
I0424 15:00:38.196958 139543169230656 checkpoint_manager.py:1566] [process=5][thread=MainThread][step=9] Starting CheckpointManager Save Finalize thread=save_finalize
I0424 15:00:38.197286 139414797788928 async_checkpointer.py:265] [process=5][thread=save_finalize] Waiting for background save thread=async_save.
I0424 15:00:38.197455 139543169230656 standard_logger.py:34] {'step': 9, 'event_type': 'save', 'directory': 'gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/linen_xpk_feat_nnx_set_defaults_true_20260424_145744_01_base/checkpoints', 'reached_preemption': False, 'preemption_received_at': None, 'synchronous': False, 'wait_for_prev_start_time': 1777042794.9901814, 'wait_for_prev_duration_secs': 42.57839584350586, 'time_between_consecutive_saves_sec': None, 'checkpointer_blocking_start_time': 1777042837.570442, 'checkpointer_blocking_duration_secs': 0.5999181270599365, 'get_old_steps_start_time': 1777042838.1703784, 'get_old_steps_duration_secs': 2.5033950805664062e-05, 'checkpoint_manager_blocking_start_time': 1777042794.9882803, 'checkpoint_manager_blocking_duration_secs': 43.20913910865784}
I0424 15:00:38.197560 139543169230656 checkpointing.py:409] Started an asynchronous checkpoint save for step 9
I0424 15:00:38.197605 139543169230656 checkpoint_manager.py:2024] [process=5][thread=MainThread][step=9][wait_until_finished] Waiting for Save Finalize thread (save_finalize) to complete.
I0424 15:00:43.111798 139415443732224 array_metadata_store.py:203] [process=5][thread=array_type_handler] Wrote 39 array_metadata.ArrayMetadata to gs://lance-maxtext/linen_ckpt_xpk_feat_nnx_set_defaults_true_20260424_145744/linen_xpk_feat_nnx_set_defaults_true_20260424_145744_01_base/checkpoints/9/items/array_metadatas/process_5
I0424 15:01:19.751045 139415393376000 base_pytree_checkpoint_handler.py:129] [process=5] /jax/checkpoint/write/gbytes_per_sec: 37.722 MiB/s (total gbytes: 1.5 GiB) (time elapsed: 41.87454319000244 s) (per-host)
I0424 15:01:19.751165 139415393376000 async_checkpointer.py:90] [process=5][thread=async_save] 3 Handler Commit operations completed. Time taken: 41.580957s.
I0424 15:01:27.183747 139415393376000 async_checkpointer.py:144] [process=5][thread=async_save] Background save thread done. Time taken: 49.013523s.
I0424 15:01:27.184070 139414797788928 async_checkpointer.py:273] [process=5][thread=save_finalize] Done with waiting for background save thread=async_save.
I0424 15:01:27.184196 139414797788928 async_checkpointer.py:283] [process=5][thread=save_finalize] No errors found in background save thread=async_save.
I0424 15:01:27.184244 139414797788928 checkpoint_manager.py:2133] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is syncing with other hosts...
I0424 15:01:27.186443 139414797788928 checkpoint_manager.py:2142] [process=5][thread=save_finalize][step=9] CheckpointManager Save Finalize is done on all hosts.
I0424 15:01:27.186633 139543169230656 checkpoint_manager.py:2036] [process=5][thread=MainThread][step=9][wait_until_finished] Done waiting for Save Finalize thread (save_finalize) running at step=9.
I0424 15:01:27.186787 139543169230656 checkpoint_manager.py:2013] [process=5][thread=MainThread][wait_until_finished] No Save Finalize thread to wait for. Returning.
I0424 15:01:27.187444 139543169230656 metric_logger.py:185] completed step: 9, seconds: 0.147, TFLOP/s/device: 92.158, Tokens/s/device: 13891.056, 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: Fri Apr 24 15:01:37 UTC 2026
EXIT_CODE=0