> Because there are 4 cores, the throughput increases linearly up to 4 threads. Then it increases slightly more up to 8 threads, thanks to hyper-threading that squeezes a bit more performance out of each core. Obviously there is no performance improvement beyond 8 threads, because all CPU resources are saturated at this point. [emphasis mine]
Can someone more knowledgeable than I please explain the obvious part of this? Why is the performance identical for 8-12 threads? What is it that is saturated at 8 threads even though there are 4 more threads hanging around?
Can someone more knowledgeable than I please explain the obvious part of this? Why is the performance identical for 8-12 threads? What is it that is saturated at 8 threads even though there are 4 more threads hanging around?