Date: Fri, 4 Jun 2004 14:50:24 -0400 From: John Baldwin <jhb@FreeBSD.org> To: freebsd-smp@FreeBSD.org Cc: Roman Kurakin <rik@cronyx.ru> Subject: Re: FreeBSD support in SMP platform Message-ID: <200406041450.24062.jhb@FreeBSD.org> In-Reply-To: <40C0ABFC.1060107@cronyx.ru> References: <20040604075905.3422.qmail@web16905.mail.tpe.yahoo.com> <200406041146.01095.jhb@FreeBSD.org> <40C0ABFC.1060107@cronyx.ru>
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On Friday 04 June 2004 01:06 pm, Roman Kurakin wrote: > John Baldwin wrote: > >[...] > >FreeBSD will see and support up to 16 CPUs, but it won't be very stable on > >probably more than 4 or 6. > > What is the reason? When a thread is made runnable the idle CPUs contest on sched_lock so much that invariable one CPU ends up timing out on sched_lock and panic'ing. This will be fixed eventually but not in the near future. -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" = http://www.FreeBSD.org
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