Date: Fri, 09 Jul 2004 12:53:53 -0500 From: Jon Noack <noackjr@alumni.rice.edu> To: Steve Kargl <sgk@troutmask.apl.washington.edu> Cc: freebsd-current@freebsd.org Subject: Re: Native preemption is the culprit [was Re: today's CURRENT lockups] Message-ID: <40EEDBB1.6090903@alumni.rice.edu> In-Reply-To: <20040709172511.GA10540@troutmask.apl.washington.edu> References: <20040705184940.GA2651@tybalt.greiner.local> <200407081317.53981.jhb@FreeBSD.org> <20040709111955.2901ce5b.taku@tackymt.homeip.net> <200407091315.16899.jhb@FreeBSD.org> <40EED38D.9010903@alumni.rice.edu> <20040709172511.GA10540@troutmask.apl.washington.edu>
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On 07/09/04 12:25, Steve Kargl wrote: > On Fri, Jul 09, 2004 at 12:19:09PM -0500, Jon Noack wrote: >> On 07/09/04 12:15, John Baldwin wrote: >>> My test machine is not a true SMP machine either, just HTT. It >>> has been running a -j 256 worldloop overnight with no problems, >>> so I committed a slightly modified version of the patch >>> yesterday. >> >> Did you test with a UP kernel? After your latest commit I have >> been experiencing regular hard locks on my pre-HTT P4 machine. >> Backing out rev. 1.114 of sched_ule.c fixes it. See my previous >> message (Re: FreeBSD keeps hanging......): >> http://docs.freebsd.org/cgi/mid.cgi?40EECC49.3070501 > > I've tested it on a UP kernel (HTT enabled, ACPI disabled, APIC > enabled, ULE). Appears to work fine. Perhaps it's just extraneous information, but if it's really a UP kernel (as in, no 'options SMP') then whether you have HTT enabled doesn't matter at all -- the kernel won't use it. Jon
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