Date: Mon, 2 Jul 2007 23:22:00 -0700 (PDT) From: Jeff Roberson <jroberson@chesapeake.net> To: Thomas Sparrevohn <Thomas.Sparrevohn@btinternet.com> Cc: freebsd-current@freebsd.org Subject: Re: New SCHED_SMP diff. Message-ID: <20070702232119.X552@10.0.0.1> In-Reply-To: <200707022031.32359.Thomas.Sparrevohn@btinternet.com> References: <20070701224452.I552@10.0.0.1> <200707021956.01128.Thomas.Sparrevohn@btinternet.com> <20070702120147.F552@10.0.0.1> <200707022031.32359.Thomas.Sparrevohn@btinternet.com>
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On Mon, 2 Jul 2007, Thomas Sparrevohn wrote: > On Monday 02 July 2007 20:02:41 Jeff Roberson wrote: >> On Mon, 2 Jul 2007, Thomas Sparrevohn wrote: >> >>> >> >> Hi, can you try sysctl kern.sched.steal_busy=1? Please tell me if that >> improves things. This will resolve short-term load imbalances by stealing >> threads from other processors. >> >> Thanks, >> Jeff >> > > If I enable "kern.sched.steal_busy" the system panics within a couple > of seconds with a "spin lock held to long". > > Mind you that the kernels I have use has all debugging turned off e.g. > no WITHNESS etc. so it could be that - I quite a while if I am to rerun > all tests with WITHNESS etc enabled - Do you want me to or do you have > a suggestion as to why it panics? Hey Thomas, sorry for the bug, can you try the scheduler at: http://people.freebsd.org/~jeff/sched_smp.c Thanks, Jeff > > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org" >
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