On 05/20/10 10:19, Avi Kivity wrote: > On 05/20/2010 11:15 AM, Jes Sorensen wrote: >>> Two things are missing to make this really useful: >>> >>> - a continuously updating difference mode like kvm_stat >>> - subevents; for example kvm:kvm_exit is an aggregate of all exit types >>> that can be split using filters to show individual exit reason >>> statistics >>> >> Third missing item, which I find really useful: >> - run once spit out raw counters >> >> For some operations, like file system benchmarking, it is useful to >> sample the counters before and after and then divide the raw number of >> events by the number of IOPS performed by the benchmark. If perf spits >> out events/sec it's kinda hard to get this. >> > > That's 'perf stat -a sleep 2'
sleep 2 doesn't really cut it, I guess you could do it with perf stat -a sleep 0.1 but to be honest, that is pretty ugly. Something like this would be a lot nicer: perf stat -a -raw Jes -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
