8000 请问ums与fiber一样只能使用一个核心吗？ · Issue #1 · zhangpf/cloud-demos · GitHub
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请问ums与fiber一样只能使用一个核心吗？ #1

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Junotja opened this issue Oct 25, 2018 · 2 comments
Open

请问ums与fiber一样只能使用一个核心吗？ #1

Junotja opened this issue Oct 25, 2018 · 2 comments

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@Junotja
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Junotja commented Oct 25, 2018

我测试之后发现，ums与fiber一样仅能使用一个核心进行处理，而thread可以写满cpu，是有什么特殊设置吗？https://docs.microsoft.com/zh-cn/windows/desktop/ProcThread/user-mode-scheduling中提到“efficiently run many threads concurrently on multiprocessor or multicore systems”。看上去应该是可以的吧？
@zhangpf
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zhangpf commented Oct 25, 2018

AFAIK, UMS can only utilize a single CPU at any time. It has the similar model as other lightweight thread libraries, except that it has system thread context. To support multicore, I think you can:

  1. Use a thread pool, while in each thread, separate UMS is applied.
  2. Choose another N:M thread model runtime, like go-runtime.

If you find a better method for UMS utilizes multicore, please tell me. Thanks.

@Junotja
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Junotja commented Oct 30, 2018

https://lastsector.wordpress.com/2013/06/08/curious-case-of-user-mode-scheduling/

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