On Tue, Oct 6, 2015 at 6:50 PM, David Matlack <dmatlack@xxxxxxxxxx> wrote: > Have you tried perf kvm stat? e.g. > > perf kvm stat record -a sleep 10 # record all vmexits for 10 seconds > perf kvm stat report --event=vmexit > > This gives per-exit counts and min/max/avg latencies. > > Alternatively you can record the raw events kvm:kvm_exit and kvm:kvm_entry and > process the data however you want. > > On Tue, Oct 6, 2015 at 3:42 PM, Prateek Sharma <prateek3.14@xxxxxxxxx> wrote: >> Hello all, >> There used to be perf scripts to do exit-level profiling of VMs >> (number of exits, time spent per exit, etc). I am using kernel version >> 3.19, and the perf utility which ships with it has a perf-kvm option, but >> that only reports total number of exits, and not the reason/latency. >> The stats in /sys/debug/kvm seem to be about number of exits only, >> not the time information. My question is: whats the most convenient way to >> get per-exit counts and durations? >> >> Thanks, >> --Prateek >> -- >> To unsubscribe from this list: send the line "unsubscribe kvm" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html Hi David, Thanks for the answer. It works perfectly. --Prateek -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
