[PATCH] D47977: [Fuzzer] First step to thread affinity

[Dmitry Vyukov via Phabricator via llvm-commits]

dvyukov added a comment.

> I understand your points, but usually see the jobs are often bound to cpu0 while this cpu can be potentially pretty busy.

Whoever is doing this needs to be fixed.
It's exactly this kind of code that introduces such problems. It tries to be "smart" but does not have full picture. And we are adding more such code, so we will have more such problems. If one uses rand mode and 2 threads happens to be bound to the same core, we lose half of performance. The sequential mode occupies cores sequentially, so two independent processes will oversubscribe first half of cores and leave remaining cores idle.
If you are adding these flags to some scripts, you can just use taskset there.


Repository:
  rCRT Compiler Runtime

https://reviews.llvm.org/D47977