Yes, that is the guilty commit, although that problem is solved. The 24 process problem is unrelated.
Unfortunately, I haven't been able to reproduce the problem on my Threadripper. I tried Laser, Stockfish 8, and Ethereal 8.28, and they all showed similar amounts of slowdown from 1 -> 8 cores (about 20-30%).
Running multiple instances of Laser at once
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jeffreyan11
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AndrewGrant
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Re: Running multiple instances of Laser at once
The 24 process problem is very likely specific to that one machine I have, so don't lose any sleep over it.
If you push the fix I will try the new version.
If you push the fix I will try the new version.
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"Those who can't do, clone instead" - Eduard ( A real life friend, not this forum's Eduard )