Date: Sun, 18 Dec 2011 02:37:52 +0000 From: Bruce Cran <bruce@cran.org.uk> 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: <4EED5200.20302@cran.org.uk> 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 13/12/2011 09:00, Andrey Chernov wrote: > 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. I'm also seeing problems with ULE on a dual-socket quad-core Xeon machine with 16 logical CPUs. If I run "tar xf somefile.tar" and "make -j16 buildworld" then logging into another console can take several seconds. Sometimes even the "Password:" prompt can take a couple of seconds to appear after typing my username. -- Bruce Cran
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