memory ordering model

Dmitriy Vyukov
Total Points: 10343
Status Points: 9843
Brown Belt
August 29, 2008 11:52 AM PDT
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#11 Reply to #10
tadayuki:

I see.  I did know it helps Hyper-Threading but we are not using it.  So I wasn't sure if 'pause' is really necessary.  But it sounds like it's also good for non-Hyper-Threading core.


I think that at least it won't worsen the situation. And official Intel guidelines says "you must use 'pause' in spin-loops". Maybe in future Intel processors 'pause' will have some additional useful consequences for non-HT.

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