当您拥有AMD CPU时，可以加快使用Intel-MKL的代码的速度吗？ [英] When you have an AMD CPU, can you speed up code that uses the Intel-MKL?

问题描述

我有一个AMD CPU，我正在尝试运行一些使用Intel-MKL的代码。该代码比我预期的要慢得多。

I have an AMD cpu and I'm trying to run some code that uses Intel-MKL. The code is significantly slower than I expected.

推荐答案

是的，您可以加快代码的速度。设置环境变量 MKL_DEBUG_CPU_TYPE = 5 然后运行您的代码。

仅供参考，这会影响任何事情使用Intel-MKL库并在AMD CPU上运行（即影响所有操作系统，并影响所有编程语言和所有程序（旧版本的Matlab ，C，C ++，Python，Anaconda-Python，机器学习，例如Tensorflow和Pytorch ，再次在AMD CPU上使用Intel-MKL库的任何东西）。

Yes you can speed up your code. Set the environment variable MKL_DEBUG_CPU_TYPE=5 then run your code.

FYI this slow down affects anything that uses Intel-MKL library and runs on AMD CPU (i.e. affects all operating systems and affects all programming languages and all programs (older versions of Matlab, C, C++, Python, Anaconda-Python, Machine-Learning like Tensorflow and Pytorch , again anything that uses Intel-MKL library on AMD CPU)).

FYI设置和获取环境变量超出了此问题的范围，但是这里有一些有用的链接：

FYI Setting and getting environment variables is out of scope for this question but here are some helpful links:

• 用于 Windows 和带有屏幕截图的另一个链接我个人是这样做的： b控制面板->系统->高级->环境变量->系统变量-> ceate new

• for Windows and another link with screenshots
  • personally i do: "old" control panel --> system --> advanced --> environment variables --> system variables --> ceate new
  
  
  • 简单的 bash 用户只想为其自己的用户设置环境变量，将 export MKL_DEBUG_CPU_TYPE = 5 行添加到用户的 .bashrc中文件
  
  
  • for the simple case of a bash user who wants to set the environment variable just for their own user append the line export MKL_DEBUG_CPU_TYPE=5 to your user's .bashrc file

  ps

  
  
  • 默认行为是Intel-MKL如果检测到非英特尔则检查CPU并运行较慢的代码。
  
  
  • 设置环境变量将覆盖默认行为，即使没有Intel硬件也可以使执行更快的代码。
  
  
  
  
  • 多年以来，英特尔一直让他们的编译代码先检查CPU，然后再检测到该CPU是否为非Intel处理器。代码会选择运行较慢的代码
  
  
  • 有诉讼
  
  
  • 诉讼的结果是英特尔不得不披露他们在做什么，但确实不必停止他们正在做的事情
  
  
  • 这是具有更多历史记录和信息的Wiki页面： https://en.wikipedia.org/wiki/Intel_C%2B%2B_Compiler#Reception
  
  
  • Intel for many years had their compiled code check the CPU first then if the CPU was detected as non-intel the code would choose to run slower code
  • there was a lawsuit
  • a result of the lawsuit was that Intel had to disclose what they were doing but did not have to stop what they were doing
  • here's the wiki page with more history and information: https://en.wikipedia.org/wiki/Intel_C%2B%2B_Compiler#Reception

  这篇关于当您拥有AMD CPU时，可以加快使用Intel-MKL的代码的速度吗？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！