On Tue, Dec 20, 2011 at 09:30:10PM -0800, Garrett Cooper wrote: > On Tue, Dec 20, 2011 at 8:55 PM, Steve Kargl > <s...@troutmask.apl.washington.edu> wrote: > > On Tue, Dec 20, 2011 at 06:45:07PM -0800, Doug Barton wrote: > >> On 12/20/2011 18:29, Ben Kaduk wrote: > >> > 2011/12/20 Doug Barton <do...@freebsd.org>: > >> >> On 12/20/2011 06:08, John Baldwin wrote: > >> >>> The defaults for src.conf should be for the common case > >> >> > >> >> Agreed. The problem we seem to be missing here is that developers are > >> >> not even statistically significant in measuring "the common case." > >> > > >> > "The common case" of what, though? ?"People using src.conf", or > >> > "people rebuilding world", or just "people using FreeBSD"? > >> > >> The latter of course. The overwhelming majority of FreeBSD users will > >> never use profiled libs, and in fact don't even know what they are. It's > >> just useless space being taken up on every install. The defaults should > >> be sensible for our users. > > > > OK, Doug, we get it! You don't like profiled libraries. > > You don't use them, and by extension the 'common user' > > does not use them. > > The point that I was trying to drive home (that I think Doug is as well) is: > - How many FreeBSD users are developers/performance/test engineers who > care about this stuff being compiled into the base system?
Don't know. I haven't seen a statistically meaningful poll of the FreeBSD user base on which to draw an answer. I suspect that neither you nor Doug have seen such a poll. > - How many developers use gprof / profiled libraries? Unfortunately, too few as evident by some of the code committed to src/. Try timing buildworld WITH_CLANG and WITHOUT_CLANG. > - How many developers reroll their world by turning on WITH_PROFILE ? As of the moment, none. WITH_PROFILE is the default. > - How often do you use gprof to profile binaries? I use profiled libraries all time. Of course, I'm interested in making my numerical codes run as fast as possible, and a profiler does an amazing job of finding the bottlenecks. You can also ask bde and das about my forays into working on libm. > Smart defaults and better tuning are what we ultimately should be > striving for, because again, WITH_PROFILE is a developer and not a > end-user / administrator convenience. Those are the individuals we > should be tailoring FreeBSD for -- not developers. How many end-users/administrators do a buildworld and how often? Neither the time to build profiled libraries nor the diskspace used is significant. Yes, I know you're going to posit that on slow ARM and embedded systems profiled libraries are undesirable. I suspect that an ARM developer has more than just WITHOUT_PROFILE her src.conf. -- Steve _______________________________________________ svn-src-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
