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    SubjectRe: x264 benchmarks BFS vs CFS
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    On Thu, 2009-12-17 at 14:22 -0700, Thomas Fjellstrom wrote:
    > On Thu December 17 2009, Kasper Sandberg wrote:
    > > On Thu, 2009-12-17 at 11:53 +0100, Ingo Molnar wrote:
    > > > * Jason Garrett-Glaser <darkshikari@gmail.com> wrote:
    > > > > On Thu, Dec 17, 2009 at 1:33 AM, Kasper Sandberg <lkml@metanurb.dk>
    > wrote:
    > > > > > well well :) nothing quite speaks out like graphs..
    > > > > >
    > > > > > http://doom10.org/index.php?topic=78.0
    > > > > >
    > > > > >
    > > > > >
    > > > > > regards,
    > > > > > Kasper Sandberg
    > > > >
    > > > > Yeah, I sent this to Mike a bit ago. Seems that .32 has basically
    > > > > tied it--and given the strict thread-ordering expectations of x264,
    > > > > you basically can't expect it to do any better, though I'm curious
    > > > > what's responsible for the gap in "veryslow", even with SCHED_BATCH
    > > > > enabled.
    > > > >
    > > > > The most odd case is that of "ultrafast", in which CFS immediately
    > > > > ties BFS when we enable SCHED_BATCH. We're doing some further
    > > > > testing to see exactly
    > >
    > > Thats kinda besides the point.
    > >
    > > all these tunables and weirdness is _NEVER_ going to work for people.
    > >
    > > now forgive me for being so blunt, but for a user, having to do
    > > echo x264 > /proc/cfs/gief_me_performance_on_app
    > > or
    > > echo some_benchmark > x264 > /proc/cfs/gief_me_performance_on_app
    > >
    > > just isnt usable, bfs matches, even exceeds cfs on all accounts, with
    > > ZERO user tuning, so while cfs may be able to nearly match up with a ton
    > > of application specific stuff, that just doesnt work for a normal user.
    > >
    > > not to mention that bfs does this whilst not loosing interactivity,
    > > something which cfs certainly cannot boast.
    > >
    > > <snip>
    >
    > Strange, I seem to recall that BFS needs you to run apps with some silly
    > schedtool program to get media apps to not skip while doing other tasks. (I
    > don't have to tweak CFS at all)
    You recall incorrectly
    >
    > > > Thanks,
    > > >
    > > > Ingo
    >
    >
    >



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