DragonFly kernel List (threaded) for 2007-09
DragonFly BSD
DragonFly kernel List (threaded) for 2007-09
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Re: vkernel timing


From: Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxx>
Date: Tue, 4 Sep 2007 14:25:58 -0700 (PDT)

:I'm also seeing this:
:
:tomcat:/etc#\time sleep 2 
:        5.54 real         0.00 user         0.00 sys
:
:-- 
:Francois Tigeot

    It's because the virtual kernel is using kqueue timers for its timer
    interrupt, and its default tick rate is higher then the kqueue timer
    can handle.

    I was going to try to fix kqueue timers but it may be better to just
    reduce the vkernel's tick rate to match real life.  I'll look into
    it and see if a quick fix is possible.

					-Matt
					Matthew Dillon 
					<dillon@backplane.com>



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