On Tue, Aug 28, 2007 at 12:48:13PM +0800, Ganbold wrote: > Kostik Belousov wrote: > >On Mon, Aug 27, 2007 at 11:14:58PM +0100, Robert Watson wrote: > > > >>On Mon, 27 Aug 2007, Ganbold wrote: > >> > >> > >>>I'm running FreeBSD 7.0-CURRENT with SCHED_ULE, INVARIANTS, WITNESS > >>>enabled kernel. > >>> > >>Try the same thing again without INVARIANTS and WITNESS, both of which > >>can consume a lot of CPU in kernel on a very active system, especially if > >>lots of vnodes are being allocated and freed. Especially WITNESS. > >> > > > >It does happens on the kernels without debug options, in particular, > >WITNESS and INVARIANTS. > > > >It happens when a lot of short-lived processes are rapidly created. > >Compilation is a good example of such workload; running configure script > >is even better. > > > > What would be a solution to this kind of problems? From my point of view it exhibits some issues with standard SCHED_4BSD scheduler in the 7.0 (my laptop is mostly unusable during 'make buildworld' for example - keyboard exhibits lost event sometimes, sound is jerking etc etc). So I'm switched to SHED_ULE on my UP laptop; it was helpful. I'm running custom kernel without debug options though. > > thanks, > > Ganbold > > > -- > That's the thing about people who think they hate computers. What they > really hate is lousy programmers. -- Larry Niven and Jerry Pournelle in > "Oath of Fealty" > _______________________________________________ > freebsd-current_at_freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe_at_freebsd.org" -- The ultimate artifact may be found in the driven snow..Received on Tue Aug 28 2007 - 13:30:28 UTC
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