On 10/15/13 at 05:30am, Josh Boyer wrote: > On Tue, Oct 15, 2013 at 5:19 AM, Dhiru Kholia <dhiru.kholia@xxxxxxxxx> wrote: > > During the development of "unSPEC" [1] benchmarking suite, I made some > > interesting observations regarding prelink. > > ... > > - For building kernels (using the "kernel-bench" [3] component of unSPEC > > suite), prelink saved <= 250 ms over the non-prelink environment > > (which took 1m19.138s). hkario even reports worse performance numbers > > for the prelink environment. Additionally, we have specialized > > softwares like ccache and distcc to solve long-compilation-time > > problems. > > I wouldn't expect building kernels to be a great thing to use to > measure performance benefits of prelink. A kernel build is basically > just calling gcc and ld over and over, and those two things themselves > have relatively few libraries involved. So your numbers match what I > would expect in this case, but I don't think it's really and accurate > testcase. Prelink isn't intended to reduce compilation times. Hi Josh, Good points. Please see http://lwn.net/Articles/341244/ page. In particular, "Note, also small but frequently used apps benefit. I run gcc etc a lot and like every single saved cycle." I just wanted to quantify these kinds of use-cases too. Does this make sense? -- Dhiru -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
