Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760643AbZAOJO6 (ORCPT ); Thu, 15 Jan 2009 04:14:58 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754639AbZAOJOk (ORCPT ); Thu, 15 Jan 2009 04:14:40 -0500 Received: from mail.klingt.org ([86.59.21.178]:45921 "EHLO klingt.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753343AbZAOJOh (ORCPT ); Thu, 15 Jan 2009 04:14:37 -0500 Subject: Re: 2.6.28-rc9: oprofile regression From: Tim Blechmann To: Thomas Gleixner Cc: Andi Kleen , oprofile-list@lists.sf.net, linux-kernel@vger.kernel.org, Robert Richter , venkatesh.pallipadi@intel.com In-Reply-To: References: <1229869416.6911.1.camel@thinkpad> <1229894585.6898.6.camel@thinkpad> <49544497.9020900@linux.intel.com> <1230894257.6072.10.camel@thinkpad> <1231957184.13033.70.camel@thinkpad> Content-Type: multipart/signed; micalg="pgp-sha1"; protocol="application/pgp-signature"; boundary="=-N+fIvzBSS8TwDaBymhf7" Date: Thu, 15 Jan 2009 10:14:13 +0100 Message-Id: <1232010853.6541.4.camel@thinkpad> Mime-Version: 1.0 X-Mailer: Evolution 2.24.2 X-Greylist: Sender succeeded SMTP AUTH authentication, not delayed by milter-greylist-3.0 (klingt.org [127.0.0.1]); Thu, 15 Jan 2009 10:14:14 +0100 (CET) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1711 Lines: 55 --=-N+fIvzBSS8TwDaBymhf7 Content-Type: text/plain Content-Transfer-Encoding: quoted-printable On Thu, 2009-01-15 at 09:46 +0100, Thomas Gleixner wrote: > Tim, >=20 > On Wed, 14 Jan 2009, Tim Blechmann wrote: > > this code (line 81/82), changes counter_width from 32 to 40. > >=20 > > if (counter_width < eax.split.bit_width) > > counter_width =3D eax.split.bit_width; > >=20 > > however when removing these lines, and thus keeping the value 32 for > > counter_width, doesn't change the behavior, only one NMI per cpu. >=20 > It would only help, when the reported bit_width would be bogus. We > know that you get at least one NMI, so lets look at the results we get > there. it seems, that ppro_check_ctrs is never called: [ 982.238639] oprofile: using NMI interrupt. hth, tim -- tim@klingt.org http://tim.klingt.org Nothing exists until or unless it is observed. An artist is making something exist by observing it. And his hope for other people is that they will also make it exist by observing it. I call it 'creative observation.' Creative viewing. William S. Burroughs --=-N+fIvzBSS8TwDaBymhf7 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iEYEABECAAYFAklu/mAACgkQdL+4qsZfVstsVgCghUmmQPdQcaLohpKrTravPa1n r1wAn0WI4pPaoPQusRuDgCt/MTUcWKPp =Y8TE -----END PGP SIGNATURE----- --=-N+fIvzBSS8TwDaBymhf7-- -- 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/