RuntimeError: DataLoader 工作进程 (PID 为 197) 已退出

hi i set the self.data_num_workers = 4 and train command :Python ${workspace}/train.py -f ${train_data_dir}/yolox_voc_s.py -d 1 -b 8 -c ${weights_data_dir}/yolox_s.pth ERROR: Unexpected bus error encountered in worker. This might be caused by insufficient shared memory (shm). ERROR: Unexpected bus error encountered in worker. This might be caused by insufficient shared memory (shm). 2022-07-06 10:48:08 | ERROR | yolox.core.launch:98 - An error has been caught in function 'launch', process 'MainProcess' (36), thread 'MainThread' (139940411148096): Traceback (most recent call last): ............ File "/opt/conda/lib/python3.6/site-packages/torch/utils/data/dataloader.py", line 521, in next data = self._next_data() │ └ <function _MultiProcessingDataLoaderIter._next_data at 0x7f457ba23b70> └ <torch.utils.data.dataloader._MultiProcessingDataLoaderIter object at 0x7f4574422550> File "/opt/conda/lib/python3.6/site-packages/torch/utils/data/dataloader.py", line 1186, in _next_data idx, data = self._get_data() │ │ └ <function _MultiProcessingDataLoaderIter._get_data at 0x7f457ba23ae8> │ └ <torch.utils.data.dataloader._MultiProcessingDataLoaderIter object at 0x7f4574422550> └ 5 File "/opt/conda/lib/python3.6/site-packages/torch/utils/data/dataloader.py", line 1142, in _get_data success, data = self._try_get_data() │ │ └ <function _MultiProcessingDataLoaderIter._try_get_data at 0x7f457ba23a60> │ └ <torch.utils.data.dataloader._MultiProcessingDataLoaderIter object at 0x7f4574422550> └ False File "/opt/conda/lib/python3.6/site-packages/torch/utils/data/dataloader.py", line 1003, in _try_get_data raise RuntimeError('DataLoader worker (pid(s) {}) exited unexpectedly'.format(pids_str)) from e └ '197' RuntimeError: DataLoader worker (pid(s) 197) exited unexpectedly when i change it from 4to 0,the train can go on, but it very slow: 2022-07-06 11:00:13 | INFO | yolox.core.trainer:261 - epoch: 8/500, iter: 8730/13381, mem: 1960Mb, iter_time: 1.418s, data_time: 1.261s, total_loss: 4.1, iou_loss: 2.0, l1_loss: 0.0, conf_loss: 1.2, cls_loss: 0.8, lr: 2.499e-03, size: 512, ETA: 94 days, 20:58:37 version: Python :3.6.9 pytorch:1.10.1 cuda version：10.2 driver vision:460.56 nvidia gpu:2080ti yolox：0.3.0