pytorch
system_error
ai_generated
partial
运行时错误:DataLoader 工作进程(pid 12345)收到信号 11(段错误)。可能原因:共享内存耗尽
RuntimeError: DataLoader worker (pid 12345) received signal 11 (Segmentation fault). Possible causes: shared memory exhausted
ID: pytorch/dataloader-worker-segfault-shared-memory
75%修复率
82%置信度
1证据数
2024-07-10首次发现
版本兼容性
| 版本 | 状态 | 引入 | 弃用 | 备注 |
|---|---|---|---|---|
| pytorch>=1.10.0 | active | — | — | — |
| linux | active | — | — | — |
根因分析
共享内存(/dev/shm)已满或太小,无法容纳 DataLoader 工作进程传输的数据,通常由于批量大小过大或高分辨率图像。
English
The shared memory (/dev/shm) is full or too small to accommodate the data being transferred from DataLoader workers, often due to large batch sizes or high-resolution images.
官方文档
https://pytorch.org/docs/stable/data.html#multi-process-data-loading解决方案
-
通过重新挂载增加 /dev/shm 的大小。在 Docker 中使用 --shm-size=8g。在裸机上编辑 /etc/fstab 或使用 mount -o remount,size=8G /dev/shm。
-
减少批量大小或在 DataLoader 中使用 pin_memory=False,避免将张量复制到固定内存,这使用共享内存。
无效尝试
常见但无效的做法:
-
40% 失败
This is a workaround that changes behavior, but it doesn't fix the underlying shared memory limit.
-
90% 失败
Larger batches increase shared memory usage, exacerbating the issue.
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70% 失败
Shared memory is recreated at boot, but the limit remains the same; it will fill up again.