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Do you see any performance differences when enabling/disabling? Our cluster uses Sandy Bridge through Skylake chips and all of our nodes have HT disabled. When
by mroche 8y ago
Do you see any performance differences when enabling/disabling? Our cluster uses Sandy Bridge through Skylake chips and all of our nodes have HT disabled. When things were tested (before I got here) there apparently was a non-trivial difference for the applications running. Curious what your results are.
- Iwan-Zotow 8y agoWe're running mostly Monte Carlo workload. For MC it is a clear win, 20 plus pct bump. On LA, I would guess otherwise
- marmaduke 8y agoThe only significant issues I’ve seen is that many libraries using threading are or were a little naive in that they’d take the core count to be thread count. Better libraries know the difference But I’m not aware of any benchmarks that pin one execution thread per physical core and compare with and without hyperthreading. I guess I have some homework to do, but then it’s a lot of effort when the results could depend on generation, clock speed etc.