3 ms·
SMT 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 of
by rigtorp 6y ago
SMT 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.