On Mon, Jun 3, 2019 at 9:37 PM Wei Wang <wei.w.wang@xxxxxxxxx> wrote: > So, I'm not sure if "quantifying LLC contention" has been proved to > be a real issue. If this is considered to be an issue: > > - without PMU, we could also write a piece of software to run in the > guest to quantify that contention (e.g. by analyzing the memory access > latency). How do you prevent this? > > - the same thing could also happen with the L1 cache (e.g. a vCPU > and a host thread run 2 logical CPUs on the same core). If this is disabled > as well, we may have very few events usable, and would like to see what you > have on the whitelist. Right - I'm aware there are other ways of detecting this - it's still a class of events that some people don't want to surface. I'll ask if there are any better examples. Eric
