Date: Tue, 18 Jul 2006 16:12:28 +0200 (CEST) From: "Matthieu Michaud" <matthieu.michaud@epita.info> To: "Martin Blapp" <mb@imp.ch> Cc: freebsd-stable@freebsd.org Subject: Re: Please confirm: top(1) cpu time broken on FreeBSD 6.1 (RELEASE/STABLE) SMP ? Message-ID: <64643.163.5.255.60.1153231948.squirrel@webmail.epita.info> In-Reply-To: <20060718152306.X36995@godot.imp.ch> References: <20060718152306.X36995@godot.imp.ch>
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Le Mar 18 juillet 2006 15:31, Martin Blapp a écrit : > > Hi all, hi, > I'm currently seeing strang things going on on all our > upgraded SMP 2 CPU boxes. 4 Boxes are upgraded from 5.5 to > 6 STABLE, one box is running 6.1 RELEASE. i'm running 6.1 RELEASE upgraded from 6.0 RELEASE. > All of them have SMP kernels, just using the provided GENERIC and SMP > kernel config files. Mergemaster has been done on all > boxes. > > If a box is full loaded top(1) shows: > > CPU states: 41.7% user, 0.0% nice, 7.7% system, 0.6% interrupt, 50.0% > idle > > I can buildworld -j 100, do verything what I want. The > sum of idle time never goes below 50.0% idle ! And the sum > of total CPU time never goes over 50.0%. i ran make buildworld -j8 and i confirm. afair it was ok on 6.0-RELEASE. > So I wonder if just top is broken (in 6.1 RELEASE too), or if this > is a SCHED4BSD bug. > > Can someone confirm this issue ? We see it on IBL X-Series 346 Boxes, > as on IBM 306M Dual Core SMP systems. i have a DELL 1600SC (bi-xeons) with a SMP kernel and machdep.hyperthreading_allowed=0. setting it to 1 made idle % to 0. -- Matthieu Michaud EPITA SRS 2007
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