Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753847AbXFZCUp (ORCPT ); Mon, 25 Jun 2007 22:20:45 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753552AbXFZCU3 (ORCPT ); Mon, 25 Jun 2007 22:20:29 -0400 Received: from chilli.pcug.org.au ([203.10.76.44]:36701 "EHLO smtps.tip.net.au" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753398AbXFZCU2 (ORCPT ); Mon, 25 Jun 2007 22:20:28 -0400 Date: Tue, 26 Jun 2007 12:20:06 +1000 From: Stephen Rothwell To: Andrew Morton Cc: Roman Zippel , Ingo Molnar , linux-kernel@vger.kernel.org, John Stultz , Thomas Gleixner Subject: Re: [patch, v2.6.22-rc6] sys_time() speedup Message-Id: <20070626122006.c94cb2c4.sfr@canb.auug.org.au> In-Reply-To: <20070625151508.86fa3778.akpm@linux-foundation.org> References: <20070625200601.GA18980@elte.hu> <200706252309.47467.zippel@linux-m68k.org> <20070625151508.86fa3778.akpm@linux-foundation.org> X-Mailer: Sylpheed 2.4.2 (GTK+ 2.10.13; i486-pc-linux-gnu) Mime-Version: 1.0 Content-Type: multipart/signed; protocol="application/pgp-signature"; micalg="PGP-SHA1"; boundary="Signature=_Tue__26_Jun_2007_12_20_06_+1000_3WGq+LFO2_s7osbG" Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1518 Lines: 46 --Signature=_Tue__26_Jun_2007_12_20_06_+1000_3WGq+LFO2_s7osbG Content-Type: text/plain; charset=US-ASCII Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, 25 Jun 2007 15:15:08 -0700 Andrew Morton wrote: > > On Mon, 25 Jun 2007 23:09:46 +0200 > Roman Zippel wrote: >=20 > > On Monday 25 June 2007, Ingo Molnar wrote: > >=20 > > > the patch improves the sysbench OLTP macrobenchmark significantly: > >=20 > > Has that any real practical relevance? >=20 > Interesting question. The patch adds a new test-n-branch to gettimeofday= () > so if gettimeofday() is used much more frequently than time(), we lose. Isn't gettimeofday() called *lots* by the X server and programs - one of the reasons we bother putting it in the VDSO. --=20 Cheers, Stephen Rothwell sfr@canb.auug.org.au http://www.canb.auug.org.au/~sfr/ --Signature=_Tue__26_Jun_2007_12_20_06_+1000_3WGq+LFO2_s7osbG Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFGgHfbFdBgD/zoJvwRAjGVAJsFv6a6Yel25R/lRCRmq/keaksh/QCeImKs 8Y+c93xy1Oy4E4O+rbxIDrg= =HJSt -----END PGP SIGNATURE----- --Signature=_Tue__26_Jun_2007_12_20_06_+1000_3WGq+LFO2_s7osbG-- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/