It would be nice to automate running a T-test on it. On August 2, 2014 2:14:50 PM PDT, Andy Lutomirski <l...@amacapital.net> wrote: >On Fri, Aug 1, 2014 at 3:13 PM, H. Peter Anvin <h...@zytor.com> wrote: >> On 08/01/2014 03:11 PM, Denys Vlasenko wrote: >>>> >>>> Could you please try to see if there is a measurable change in the >>>> latency of a trivial syscall? >>> >>> Will do. >>> Something along the lines of "how long does it take to execute two >>> gazillions of getppid()?" >>> >> >> Something like that, yes, but you have to run enough data points so >you >> can determine if the difference is statistically significant or just >noise. > >Denys, if you want to avoid five minutes of programming, you can build >this: > >https://gitorious.org/linux-test-utils/linux-clock-tests/ > >and run timing_test_64 10 getpid > >It doesn't do real statistics, but it seems to get quite stable >results. > >--Andy
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