Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751863AbaG1GxN (ORCPT ); Mon, 28 Jul 2014 02:53:13 -0400 Received: from casper.infradead.org ([85.118.1.10]:57442 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751642AbaG1GxK (ORCPT ); Mon, 28 Jul 2014 02:53:10 -0400 Date: Mon, 28 Jul 2014 08:52:55 +0200 From: Peter Zijlstra To: "Yan, Zheng" Cc: linux-kernel@vger.kernel.org, mingo@kernel.org, acme@infradead.org, eranian@google.com, andi@firstfloor.org Subject: Re: [PATCH v3 6/9] perf, x86: handle multiple records in PEBS buffer Message-ID: <20140728065255.GI6758@twins.programming.kicks-ass.net> References: <1406016602-31845-1-git-send-email-zheng.z.yan@intel.com> <1406016602-31845-7-git-send-email-zheng.z.yan@intel.com> <20140725081033.GV3935@laptop> <53D216A4.3090600@intel.com> <20140725140652.GA6758@twins.programming.kicks-ass.net> <53D5B45E.4030403@intel.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="r8zkF+xBtxUQJvKX" Content-Disposition: inline In-Reply-To: <53D5B45E.4030403@intel.com> User-Agent: Mutt/1.5.21 (2012-12-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --r8zkF+xBtxUQJvKX Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Mon, Jul 28, 2014 at 10:24:30AM +0800, Yan, Zheng wrote: > I don't think this method works for interrupt threshold > 1 case. When collision > happens, the hardware only create one PEBS record. The status in next record has > nothing to do with the collision record. Andi previously stated that the hardware will always generate a record for each event: http://marc.info/?l=linux-kernel&m=140129731708247 Please lock yourselves in room and do not come out until you can give a straight and coherent answer. --r8zkF+xBtxUQJvKX Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQIcBAEBAgAGBQJT1fNDAAoJEHZH4aRLwOS6u5oP/A03p5N8rPkavjtE9Kfiz0gZ /B9U1gQJj82D7+juK6OCdH7R4dlAgk0klOrH8XOqC+cygbxnONeA2bQGlykKB4Bq sW6tIRuuApz2xBqHieOW+wB8NarxRnlcMPmZRWgSc9Jh2FBc3sTIOxJFT9+YTuW3 HQRjDpVYz4MSwx8R6KldXg+uoEmxbXSaDYwnXKpJ3gJK/WUOeuZH7QD/E7mYfEUf 91UWlfjc7mQrRLrYMazkZgxFI6RTKssV5t9MEOH6yNze3yMw7TAi7g/6KJnyheMU gu2OZyTpqYSL+/xQ0zeHn+8WWN/Ejwah5B3EBixzDU5jPleJSUMHWQIVcSX5FYE7 8/pEd4Xl9AEttPTKbG2I7xxx+3keDfgTxXThiGSRTxK/7yhztYFvLxe8IRJInIZV a/cTEQtXHGdOoqNK3cRWU5muyaVvPmr1LfdE6x3h/0c1kRAuvNk7PJt2jIduVzlw pwlFMfL5GbyO+ZlUBl2Z7i+xOogYNKmSRicZ/vEKJJsvnsqLPVRu86QhawfuZUFS I6OkdWpcKNOaZFPgAQC8UQlnofUazObh0WipQsO6Jgmj16Mm5qRaliqlN10YoHzr FhsCXMP58c/vcLE9AuRdiugJA51UFt1Y9pOmkjlqWNLWriJmWWNLgieaozsn4eWv esJgcbhjgDEHSSChUIHC =xHzW -----END PGP SIGNATURE----- --r8zkF+xBtxUQJvKX-- -- 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/