From mboxrd@z Thu Jan 1 00:00:00 1970 From: Linus Torvalds Subject: Re: [Bug #11308] tbench regression on each kernel release from 2.6.22 -> 2.6.28 Date: Mon, 17 Nov 2008 11:47:24 -0800 (PST) Message-ID: References: <20081117110119.GL28786@elte.hu> <4921539B.2000002@cosmosbay.com> <20081117161135.GE12081@elte.hu> <20081117.113158.200497613.davem@davemloft.net> Mime-Version: 1.0 Return-path: In-Reply-To: <20081117.113158.200497613.davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org> Sender: kernel-testers-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: Content-Type: TEXT/PLAIN; charset="us-ascii" Content-Transfer-Encoding: 7bit To: David Miller Cc: mingo-X9Un+BFzKDI@public.gmane.org, dada1-fPLkHRcR87vqlBn2x/YWAg@public.gmane.org, rjw-KKrjLPT3xs0@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, kernel-testers-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, cl-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org, efault-Mmb7MZpHnFY@public.gmane.org, a.p.zijlstra-/NLkJaSkS4VmR6Xm/wNWPw@public.gmane.org On Mon, 17 Nov 2008, David Miller wrote: > > The scheduler has accounted for at least %10 of the tbench > regressions at this point, what are you talking about? I'm wondering if you're not looking at totally different issues. For example, if I recall correctly, David had a big hit on the hrtimers. And I wonder if perhaps Ingo's numbers are without hrtimers or something? The other possibility is that it's just a sparc suckiness issue, that simply doesn't show up on x86. Linus