W0325 16:55:16.395000 538513 site-packages/torch/distributed/run.py:793] 
W0325 16:55:16.395000 538513 site-packages/torch/distributed/run.py:793] *****************************************
W0325 16:55:16.395000 538513 site-packages/torch/distributed/run.py:793] Setting OMP_NUM_THREADS environment variable for each process to be 1 in default, to avoid your system being overloaded, please further tune the variable for optimal performance in your application as needed. 
W0325 16:55:16.395000 538513 site-packages/torch/distributed/run.py:793] *****************************************
时间网格：t_c=0.75, 步数 (1→t_c)=100, (t_c→0)=50
Total number of images that will be sampled: 40192

sampling:   0%|          | 0/157 [00:00<?, ?it/s][rank2]:[W325 16:56:59.533804859 ProcessGroupNCCL.cpp:4115] [PG ID 0 PG GUID 0 Rank 2]  using GPU 2 to perform barrier as devices used by this process are currently unknown. This can potentially cause a hang if this rank to GPU mapping is incorrect.Specify device_ids in barrier() to force use of a particular device,or call init_process_group() with a device_id.
[rank3]:[W325 16:57:00.799344818 ProcessGroupNCCL.cpp:4115] [PG ID 0 PG GUID 0 Rank 3]  using GPU 3 to perform barrier as devices used by this process are currently unknown. This can potentially cause a hang if this rank to GPU mapping is incorrect.Specify device_ids in barrier() to force use of a particular device,or call init_process_group() with a device_id.
[rank1]:[W325 16:57:00.847229448 ProcessGroupNCCL.cpp:4115] [PG ID 0 PG GUID 0 Rank 1]  using GPU 1 to perform barrier as devices used by this process are currently unknown. This can potentially cause a hang if this rank to GPU mapping is incorrect.Specify device_ids in barrier() to force use of a particular device,or call init_process_group() with a device_id.
[rank0]:[W325 16:57:01.326116049 ProcessGroupNCCL.cpp:4115] [PG ID 0 PG GUID 0 Rank 0]  using GPU 0 to perform barrier as devices used by this process are currently unknown. This can potentially cause a hang if this rank to GPU mapping is incorrect.Specify device_ids in barrier() to force use of a particular device,or call init_process_group() with a device_id.

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W0325 18:03:18.212000 538513 site-packages/torch/distributed/elastic/multiprocessing/api.py:897] Sending process 538677 closing signal SIGTERM
W0325 18:03:18.212000 538513 site-packages/torch/distributed/elastic/multiprocessing/api.py:897] Sending process 538678 closing signal SIGTERM
E0325 18:03:18.554000 538513 site-packages/torch/distributed/elastic/multiprocessing/api.py:869] failed (exitcode: -9) local_rank: 1 (pid: 538676) of binary: /gemini/space/zhaozy/guzhenyu/envs/envs/SiT/bin/python
Traceback (most recent call last):
  File "/gemini/space/zhaozy/guzhenyu/envs/envs/SiT/bin/torchrun", line 33, in <module>
    sys.exit(load_entry_point('torch==2.5.1', 'console_scripts', 'torchrun')())
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/gemini/space/zhaozy/guzhenyu/envs/envs/SiT/lib/python3.12/site-packages/torch/distributed/elastic/multiprocessing/errors/__init__.py", line 355, in wrapper
    return f(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^
  File "/gemini/space/zhaozy/guzhenyu/envs/envs/SiT/lib/python3.12/site-packages/torch/distributed/run.py", line 919, in main
    run(args)
  File "/gemini/space/zhaozy/guzhenyu/envs/envs/SiT/lib/python3.12/site-packages/torch/distributed/run.py", line 910, in run
    elastic_launch(
  File "/gemini/space/zhaozy/guzhenyu/envs/envs/SiT/lib/python3.12/site-packages/torch/distributed/launcher/api.py", line 138, in __call__
    return launch_agent(self._config, self._entrypoint, list(args))
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/gemini/space/zhaozy/guzhenyu/envs/envs/SiT/lib/python3.12/site-packages/torch/distributed/launcher/api.py", line 269, in launch_agent
    raise ChildFailedError(
torch.distributed.elastic.multiprocessing.errors.ChildFailedError: 
==========================================================
sample_from_checkpoint_ddp.py FAILED
----------------------------------------------------------
Failures:
  <NO_OTHER_FAILURES>
----------------------------------------------------------
Root Cause (first observed failure):
[0]:
  time      : 2026-03-25_18:03:18
  host      : 24c964746905d416ce09d045f9a06f23-taskrole1-0
  rank      : 1 (local_rank: 1)
  exitcode  : -9 (pid: 538676)
  error_file: <N/A>
  traceback : Signal 9 (SIGKILL) received by PID 538676
==========================================================