如何调试只有一个运行X11的显卡的CUDA库 [英] How do I debug a CUDA library with only 1 graphics card running X11

问题描述

我正在运行一个CUDA库，我需要调试内存问题和其他问题。但是当我将cuda-gdb附加到进程时，会出现错误

I'm running a CUDA library that I need to debug for memory problems and other issues. But when I attach cuda-gdb to the process I get the error

错误：所有CUDA设备都用于X11，调试。

error: All CUDA devices are used for X11 and cannot be used while debugging.

我理解错误，但有一种方法，我可以调试的问题。因为我只有1个GPU，关闭X11真的不切实际。

I understand the error, but there has to be a way that I can debug the issues. Since I only have 1 GPU, it really isn't practical to turn off X11.

在非Nvidia硬件上，我认为有一种方法来模拟cuda gpu。

On non Nvidia hardware I thought there was a way to emulate a cuda gpu. could this be setup for debugging even though I have an NVIDIA gpu?

推荐答案

首先，因为你使用的是Linux，重新在幸运的位置，你可以杀死X很容易只是为了调试的时间。

First of all, as you are using Linux you're in a lucky position as you can kill X pretty easily just for the time of debugging.

但是，如果你真的想在调试时坚持运行X，那么运气不好，因为这不是一个非常好的 原因：显示驱动器具有称为看门狗定时器的保护机制，当使用中的GPU还驱动显示器时启用该保护机制。看门狗定时器中断任何运行时间更长的AFAIR 5s的内核。这是为了防止GPU锁定。

However, if you really want to stick to running X while debugging you are out of luck, as this is not possible for a very good reason: the display driver has a protection mechanism called watchdog timer which is enabled when the GPU in use also drives a display. The watchdog timer interrupts any kernel that runs for longer AFAIR 5s. This is intended to prevent GPU lockups.

或者，您也可以尝试使用 ocelot ，但我不知道它提供的调试功能有多好。

Alternatively, you could try using ocelot, but I am not sure how good are the debugging features it provides.

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