Date: Sat, 29 Mar 2014 16:04:58 +0000 From: Alexey Dokuchaev <danfe@FreeBSD.org> To: Joe Nosay <superbisquit@gmail.com> Cc: Alexey Dokuchaev <danfe@nsu.ru>, ppc@freebsd.org Subject: Re: System clock falls behind quickly on Mac mini G4 Message-ID: <20140329160458.GA95482@FreeBSD.org> In-Reply-To: <20140329130507.GA28559@FreeBSD.org> References: <20140328071714.GA45961@regency.nsu.ru> <CAFY7cWBCFmtx4Tsg3=mSJyscpk5nCY3S6Sxy52TKEoTmy1sFPA@mail.gmail.com> <CA%2BWntOtEoqG_RJ2D9vSb7mO-UfT13RZbAb04p6rV2mWLBu=H9Q@mail.gmail.com> <20140329100134.GA7863@regency.nsu.ru> <CA%2BWntOup7_98LoCLJ43xWc3magTArKNVUEHg_2v1UFWoGp=HJQ@mail.gmail.com> <20140329130507.GA28559@FreeBSD.org>
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On Sat, Mar 29, 2014 at 01:05:07PM +0000, Alexey Dokuchaev wrote: > On Sat, Mar 29, 2014 at 09:01:38AM -0400, Joe Nosay wrote: > > I found from building on a G3 400MHz, a G4 800MHz, and a G4 933MHz that > > increasing the clock rate to that value improved performance and decreased > > lag. Try and see for yourself. Even 1500 works better than 1000. My opinion > > based on observation. > > Thanks for suggestion; I'll try. I've done a "time make buildkernel -DNO_MODULES" (with GENERIC config) both against kern.hz=1000 (default) and kern.hz=2000: kern.hz=1000: 1103.7u, 187.0s kern.hz=2000: 1108.1u, 168.7s So it doesn't look like it plays a big role. I'll stick with kern.hz=2000 for a while to see if it makes any difference in interactive workloads though. ./danfe
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