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It shouldn't, that's the whole reason SMT exists. If there is detectable jitter that would be notable. People have a bad taste in their mouth that was left cir
by R0b0t1 6y ago
It shouldn't, that's the whole reason SMT exists. If there is detectable jitter that would be notable.
People have a bad taste in their mouth that was left circa ~2000(?) from some Intel parts with a pipeline that was too deep. Ever since that was fixed most workloads do see a 2x speedup when enabling SMT.
- rigtorp 6y agoSMT sibling threads can definitely impact each other. It works great for common workloads. If you have a highly tuned workload with high IPC or want to trade off throughput for latency, disabling SMT can be a win. Disabling SMT also increases effective L1 and L2 cache which can be beneficial.