5 ms·
It normally helps "some", and rarely hurts performance. So you might as well enable it.
by esaym 9y ago
It normally helps "some", and rarely hurts performance. So you might as well enable it.
- ploxiln 9y agoI worry about hyperthreading hurting worst-case latency (since a thread might be assigned to run on a virtual core which does not work as fast as expected).
- KayEss 9y agoI've looked for this and I see little evidence that worries me (this on Linux). The kernel seems to schedule first on the real primaries and then on the secondaries within a pair, and the kernel is also not all that shy about moving a thread to a different CPU.