Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753040AbZIOLTD (ORCPT ); Tue, 15 Sep 2009 07:19:03 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752891AbZIOLS5 (ORCPT ); Tue, 15 Sep 2009 07:18:57 -0400 Received: from mga11.intel.com ([192.55.52.93]:7013 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752880AbZIOLS5 convert rfc822-to-8bit (ORCPT ); Tue, 15 Sep 2009 07:18:57 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.44,388,1249282800"; d="scan'208";a="493584722" From: "Metzger, Markus T" To: Peter Zijlstra CC: "mingo@elte.hu" , "tglx@linutronix.de" , "hpa@zytor.com" , "markus.t.metzger@gmail.com" , "linux-kernel@vger.kernel.org" Date: Tue, 15 Sep 2009 12:18:23 +0100 Subject: RE: [patch, resend] x86, perf_counter, bts: optimize BTS overflow handling Thread-Topic: [patch, resend] x86, perf_counter, bts: optimize BTS overflow handling Thread-Index: Aco19Wx/EZ1pJNMYR3Oa6lH8UQ3UUgAABVoQ Message-ID: <928CFBE8E7CB0040959E56B4EA41A77EC47B0E9E@irsmsx504.ger.corp.intel.com> References: <20090915130023.A16204@sedona.ch.intel.com> <1253013145.5506.50.camel@laptop> In-Reply-To: <1253013145.5506.50.camel@laptop> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2178 Lines: 60 >-----Original Message----- >From: Peter Zijlstra [mailto:a.p.zijlstra@chello.nl] >Sent: Tuesday, September 15, 2009 1:12 PM >> Restructure perf_counter sampling into sample creation and sample >> output. >> Prepare a single reference sample for BTS sampling and update the from >> and to address fields when draining the BTS buffer. >> Drain the entire BTS buffer between a single perf_output_begin() / >> perf_output_end() pair. > >Generally looks very nice, one thing though, why did you take regs out >of perf_sample_data, now you get to pass around one extra param.. That is to make perf_sample_data describe the sample directly. The regs are used to create the sample; they're not needed once the sample has been created. >> CC: Peter Zijlstra >> Signed-off-by: Markus Metzger >> --- >> arch/x86/kernel/cpu/perf_counter.c | 60 37 + 23 - 0 ! >> include/linux/perf_counter.h | 68 64 + 4 - 0 ! >> kernel/perf_counter.c | 306 161 + 145 - 0 ! >> 3 files changed, 262 insertions(+), 172 deletions(-) > >What is that diffstat thing? I always get things like: > > kernel/sched.c | 4 ++-- > 1 files changed, 2 insertions(+), 2 deletions(-) > I'm using QUILT_DIFFSTAT_OPTS="-f0". regards, markus. --------------------------------------------------------------------- Intel GmbH Dornacher Strasse 1 85622 Feldkirchen/Muenchen Germany Sitz der Gesellschaft: Feldkirchen bei Muenchen Geschaeftsfuehrer: Douglas Lusk, Peter Gleissner, Hannes Schwaderer Registergericht: Muenchen HRB 47456 Ust.-IdNr. VAT Registration No.: DE129385895 Citibank Frankfurt (BLZ 502 109 00) 600119052 This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). Any review or distribution by others is strictly prohibited. If you are not the intended recipient, please contact the sender and delete all copies. -- 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/