Date: Sat, 02 Oct 2004 11:14:22 -0700 From: Julian Elischer <julian@elischer.org> To: Peter Holm <peter@holm.cc> Cc: "freebsd-arch@freebsd.org" <freebsd-arch@freebsd.org> Subject: Re: scheduler (sched_4bsd) questions Message-ID: <415EEFFE.5080309@elischer.org> 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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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 > > - Peter > _______________________________________________ > freebsd-arch@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-arch > To unsubscribe, send any mail to "freebsd-arch-unsubscribe@freebsd.org" When this happes, drop to debugger.. using: kdb_enter("Giant too long"); and dump out teh thread backtrace, and the output of show ktr iff you have ktr enabled.. (as we discussed before)
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