Date: Tue, 13 Dec 2011 02:22:48 -0800 From: Adrian Chadd <adrian@freebsd.org> To: Andrey Chernov <ache@freebsd.org>, Ivan Klymenko <fidaj@ukr.net>, Doug Barton <dougb@freebsd.org>, "O. Hartmann" <ohartman@mail.zedat.fu-berlin.de>, Current FreeBSD <freebsd-current@freebsd.org>, freebsd-stable@freebsd.org, freebsd-performance@freebsd.org Subject: Re: SCHED_ULE should not be the default Message-ID: <CAJ-Vmo=y44c2Lek058Rc=thVb%2Bgzu2fm7i0vMHipiGGHC086Yw@mail.gmail.com> In-Reply-To: <20111213090051.GA3339@vniz.net> 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>
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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? Adrian
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