On 01/16/2012 06:11 PM, Avi Kivity wrote: >> Total Samples:975981, Total events handled time:126502464.88us. > > Nice! If we can have a live version as well, this can replace kvm_stat. > > The average numbers are really high. Like a factor of 3x-4x off. Would > be good to print the standard deviation and see why. Maybe it's due to > the tracing overhead. > It is a good suggestion, i will print stddev in the next version. >> The default event to be analysed is vmexit, we can use --event to specify it, >> for example, if we want to trace mmio event: >> # ./perf kvm-events report --event mmio >> Warning: Error: expected type 5 but read 4 >> Warning: Error: expected type 5 but read 0 >> Warning: unknown op '}' >> >> >> Analyze events for all VCPUs: >> >> MMIO Access Samples Samples% Time% Avg time >> >> 0xfee00380:W 196589 64.95% 70.01% 3.83us >> 0xfee00310:W 35356 11.68% 6.48% 1.97us >> 0xfee00300:W 35356 11.68% 16.37% 4.97us >> 0xfee00300:R 35356 11.68% 7.14% 2.17us > > These are more reasonable (though still high - 5us for an ICR write?) > Hmm, maybe i need look into it... >> Total Samples:975981, Total events handled time:126502464.88us. >> >> I hope guys will like it and any comments are welcome! :) > > I think it's great! A live version would be a nice addition too. > > Please copy the perf userspace maintainers to get more detailed review > in the next version. > Okay, Thanks! -- 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
