cuda-gdb fatal: All CUDA devices are used for display and cannot be used while debugging.问题解决

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在用cuda-gdb调试cuda程序时，会报错：

fatal:  All CUDA devices are used for display and cannot be used while debugging. (error code = CUDBG_ERROR_ALL_DEVICES_WATCHDOGGED(0x18)
(cuda-gdb) [Thread 0x7fffb1b51700 (LWP 16435) exited]
[Thread 0x7fffb6352700 (LWP 16434) exited] 
[Thread 0x7fffb9354700 (LWP 16432) exited] 
[Thread 0x7fffb9b55700 (LWP 16431) exited]
[Thread 0x7fffbe356700 (LWP 16430) exited]
[Thread 0x7fffbeb57700 (LWP 16429) exited]
[Thread 0x7ffff7f71a40 (LWP 16427) exited]

解决方法：在.bashrc文件中添加

export CUDA_DEBUGGER_SOFTWARE_PREEMPTION=1

然后source ~/.bashrc即可。

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