Date: Wed, 14 Dec 2011 21:34:35 +0400 From: Andrey Chernov <ache@FreeBSD.ORG> To: Adrian Chadd <adrian@FreeBSD.ORG> Cc: Ivan Klymenko <fidaj@ukr.net>, Doug Barton <dougb@FreeBSD.ORG>, freebsd-stable@FreeBSD.ORG, "O. Hartmann" <ohartman@mail.zedat.fu-berlin.de>, Current FreeBSD <freebsd-current@FreeBSD.ORG>, freebsd-performance@FreeBSD.ORG Subject: Re: SCHED_ULE should not be the default Message-ID: <20111214173435.GA41893@vniz.net> In-Reply-To: <CAJ-Vmo=y44c2Lek058Rc=thVb%2Bgzu2fm7i0vMHipiGGHC086Yw@mail.gmail.com> References: <4EE1EAFE.3070408@m5p.com> <4EE22421.9060707@gmail.com> <4EE6060D.5060201@mail.zedat.fu-berlin.de> <4EE69C5A.3090005@FreeBSD.org> <20111213104048.40f3e3de@nonamehost.> <20111213090051.GA3339@vniz.net> <CAJ-Vmo=y44c2Lek058Rc=thVb%2Bgzu2fm7i0vMHipiGGHC086Yw@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tue, Dec 13, 2011 at 02:22:48AM -0800, Adrian Chadd wrote: > On 13 December 2011 01:00, Andrey Chernov <ache@freebsd.org> wrote: > > >> If the algorithm ULE does not contain problems - it means the problem > >> has Core2Duo, or in a piece of code that uses the ULE scheduler. > > > > I observe ULE interactivity slowness even on single core machine (Pentium > > 4) in very visible places, like 'ps ax' output stucks in the middle by ~1 > > second. When I switch back to SHED_4BSD, all slowness is gone. > > Are you able to provide KTR traces of the scheduler results? Something > that can be fed to schedgraph? Sorry, this machine is not mine anymore. I try SCHED_ULE on Core 2 Duo instead and don't notice this effect, but it is overall pretty fast comparing to that Pentium 4. -- http://ache.vniz.net/
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20111214173435.GA41893>