Nate Lawson <nate_at_root.org> wrote: [Moving to -current] >> I wonder if moving to HZ=1000 on amd64 and i386 was really all that good >> of an idea. Having preemption in the kernel means that ithreads can run >> right away instead of having to wait for a tick, and various fixes to >> 4BSD in the past year have eliminated bugs that would make the CPU wait >> for up to a tick to schedule a thread. So all we're getting now is a >> 10x increase in scheduler overhead, including reading the timecounters. > > I use hz=100 on my systems due to the 1 khz noise from C3 sleep. > Windows has the same problem. My laptop makes noises when being (more or less) idle (I think I enabled C3...). Does this mean I should try to change HZ? If yes: Windows doesn't make such a noise, does this mean it doesn't use C3 on this system (your comment suggests that Windows does use a HZ=1000 like behavior)? Bye, Alexander. -- http://www.Leidinger.net Alexander _at_ Leidinger.net: PGP ID = B0063FE7 http://www.FreeBSD.org netchild _at_ FreeBSD.org : PGP ID = 72077137 The last person who quit or was fired will be held responsible for everything that goes wrong -- until the next person quits or is fired.Received on Thu Oct 20 2005 - 10:10:34 UTC
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