On Thu, 12 Nov 2015 21:04:53 -0800 Craig Rodrigues <rodr...@freebsd.org> wrote:
> On Thu, Nov 12, 2015 at 9:40 AM, Bryan Drewery <bdrew...@freebsd.org> wrote: > > > - The first is WITH_FAST_DEPEND. Please see the commit for its full > > > > I have enabled WITH_FAST_DEPEND in make.conf for several builds. I have enabled it in src.conf ( head@r290570, GENERIC-NODEBUG kernel) On hw.model: Intel(R) Xeon(R) CPU E5504 @ 2.00GHz time make -j8 buildworld: 3685.33 real 25176.56 user 1918.05 sys WITH_FAST_DEPEND 3904.77 real 25833.18 user 2327.22 sys without > (1) Job: https://jenkins.freebsd.org/job/FreeBSD_HEAD > Before WITH_FAST_DEPEND: > https://jenkins.freebsd.org/job/FreeBSD_HEAD/3488/ 1 hour, 23 minutes > After WITH_FAST_DEPEND: > https://jenkins.freebsd.org/job/FreeBSD_HEAD/3497/ , 1 hour, 17 minutes > > Compiler used: clang > > (2) Job: https://jenkins.freebsd.org/job/FreeBSD_HEAD_sparc64/ > Before WITH_FAST_DEPEND: > https://jenkins.freebsd.org/job/FreeBSD_HEAD_sparc64/1309/ , 23 minutes > After WITH_FAST_DEPEND: > https://jenkins.freebsd.org/job/FreeBSD_HEAD_sparc64/1329/ , 22 minutes > > Compiler used: gcc 4.2.1 > > (3) Job: https://jenkins.freebsd.org/job/FreeBSD_HEAD_amd64_gcc4.9/ > Before WITH_FAST_DEPEND: > https://jenkins.freebsd.org/job/FreeBSD_HEAD_amd64_gcc4.9/761/ , 1 hour, 7 > minutes > After WITH_FAST_DEPEND: > https://jenkins.freebsd.org/job/FreeBSD_HEAD_amd64_gcc4.9/762/ , 1 hour 2 > minutes > > Compiler: gcc 4.9.2 > > The timings are not very scientific, because the VM's in which the builds > are occurring are > very loaded, since each build host is running multiple VM's, which are > building different things. > > This gives you a basic idea though, that WITH_FAST_DEPEND works on a few > compilers (clang, gcc 4.2, gcc 4.9), > and there is some build time reduction, and no increase in build time. > > Congratulations for tackling this stuff in FreeBSD. As you mentioned, this > area has not been touched > in 14 years. > -- > Craig -- wbr, tiger _______________________________________________ freebsd-current@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
