Date: Sat, 02 Oct 2004 09:55:53 -0400 From: Stephan Uphoff <ups@tree.com> To: Peter Holm <peter@holm.cc> Cc: "freebsd-arch@freebsd.org" <freebsd-arch@freebsd.org> Subject: Re: scheduler (sched_4bsd) questions Message-ID: <1096725353.27811.836.camel@palm.tree.com> In-Reply-To: <20041002053351.GA6259@peter.osted.lan> References: <1095468747.31297.241.camel@palm.tree.com> <1096477932.3733.1471.camel@palm.tree.com> <1096489576.3733.1868.camel@palm.tree.com> <200409291652.29990.jhb@FreeBSD.org> <1096496057.3733.2163.camel@palm.tree.com> <1096603981.21577.195.camel@palm.tree.com> <1096608201.21577.203.camel@palm.tree.com> <20041001141040.GA1556@peter.osted.lan> <1096647194.27811.12.camel@palm.tree.com> <20041001192551.GA3381@peter.osted.lan> <20041002053351.GA6259@peter.osted.lan>
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On Sat, 2004-10-02 at 01:33, Peter Holm wrote: > On Fri, Oct 01, 2004 at 09:25:51PM +0200, Peter Holm wrote: > > > > > > > > For once I'm the bearer of good news. The switch_patch_v2 + the > > > > sched_4bsd patch ran the tests for more than one hour without > > > > any freeze. The sched_4bsd alone did not stop the freezes. I'm > > > > now testing the switch_patch_v2 alone and it's looking good for > > > > 55+ minutes of testing. > > > > > > Great ! > > > I guess I should roll a cleaned up cumulative patch soon. > > > > > > Stephan > > > > I have now been running the stress test for more than 3½ hours, without > > any freezes. I have included the two of your changes I have been using. > > > > - Peter > > After more testing, I'm sad to report that the freeze is still there. > The patch has however decreased the number of freezes dramatically: > > During 14 hours of testing 3 separate freezes has been seen: > > 24 Giant held for more than 60 sec by td 0xc244e900, pid 27683 > 31 Giant held for more than 60 sec by td 0xc1b7b600, pid 12098 > 79 Giant held for more than 60 sec by td 0xc25f3180, pid 75531 You should also run with MUTEX_WAKE_ALL in your config file AND the mutex patch. I think this is it but will verify later today. Sorry -have to run - will roll the cumulative patch tonight (EST). Stephan
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