From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Dumazet Subject: Re: [Bug #11308] tbench regression on each kernel release from 2.6.22 -> 2.6.28 Date: Mon, 17 Nov 2008 18:42:57 +0100 Message-ID: <4921AD21.9020006@cosmosbay.com> References: <1ScKicKnTUE.A.VxH.DIHIJB@chimera> <20081117090648.GG28786@elte.hu> <20081117.011403.06989342.davem@davemloft.net> <20081117110119.GL28786@elte.hu> <4921539B.2000002@cosmosbay.com> <20081117161135.GE12081@elte.hu> <49219D36.5020801@cosmosbay.com> <20081117170844.GJ12081@elte.hu> <20081117172549.GA27974@elte.hu> <4921AAD6.3010603@cosmosbay.com> Mime-Version: 1.0 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: Sender: kernel-testers-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: Content-Type: text/plain; charset="iso-8859-1"; format="flowed" To: Linus Torvalds Cc: Ingo Molnar , David Miller , 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, Stephen Hemminger Linus Torvalds a =E9crit : >=20 > On Mon, 17 Nov 2008, Eric Dumazet wrote: >=20 >> Ingo Molnar a =E9crit : >=20 >>> it gives a small speedup of ~1% on my box: >>> >>> before: Throughput 3437.65 MB/sec 64 procs >>> after: Throughput 3473.99 MB/sec 64 procs >> Strange, I get 2350 MB/sec on my 8 cpus box. "tbench 8" >=20 > I think Ingo may have a Nehalem. Let's just say that those things roc= k,=20 > and have rather good memory throughput. >=20 I want one :) Or even two of them :)