From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755144AbaE1T3F (ORCPT ); Wed, 28 May 2014 15:29:05 -0400 Received: from casper.infradead.org ([85.118.1.10]:44361 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751250AbaE1T3C (ORCPT ); Wed, 28 May 2014 15:29:02 -0400 Date: Wed, 28 May 2014 21:28:53 +0200 From: Peter Zijlstra To: Andi Kleen Cc: "Yan, Zheng" , linux-kernel@vger.kernel.org, mingo@elte.hu, eranian@google.com Subject: Re: [RFC PATCH 6/7] perf, x86: large PEBS interrupt threshold Message-ID: <20140528192853.GY13658@twins.programming.kicks-ass.net> References: <1401257890-30535-1-git-send-email-zheng.z.yan@intel.com> <1401257890-30535-7-git-send-email-zheng.z.yan@intel.com> <20140528081053.GP11096@twins.programming.kicks-ass.net> <20140528145831.GH29957@tassilo.jf.intel.com> <20140528153548.GY11096@twins.programming.kicks-ass.net> <20140528160847.GJ29957@tassilo.jf.intel.com> <20140528170531.GT30445@twins.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="l5oECiFRo5dp+2y7" Content-Disposition: inline In-Reply-To: <20140528170531.GT30445@twins.programming.kicks-ass.net> 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 --l5oECiFRo5dp+2y7 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, May 28, 2014 at 07:05:31PM +0200, Peter Zijlstra wrote: > If we get the PMI (where denoted) we can actually reconstruct which > event triggered, by looking at which bit(s) flipped between the recorded > state and the current state (due to E coming before F) >=20 just a bit flip (xor) isn't enough, we need to find the bit that flipped off, so the condition gets slightly more complicated. --l5oECiFRo5dp+2y7 Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQIcBAEBAgAGBQJThjj1AAoJEHZH4aRLwOS6RKcP/3ogfblj/Z9sFlWlgNFhbKjT RpSvJd8hyG/jsRY4nmWer4SQzbZD9RIioktG/rUiOGr9Ata6IB4sOxH/LYfqrT2q 1B3/0bLmHVct8ocVux0jZVP8Rcnf7vyXNNACM6p9oPSeqRIKSJwchmaUAxLhiuEU /ODQ9GX13ztCTyxT9urR/rEzfybu+9ddYKfpfSFs078p15ti59DIuRoHY1DLuQVY kpJCYGQe6tUSXtrGd5gND14Vy+a16iy09IAylX1zjMxenmyLTVvNXB4LTyK7ndno wLkU0y81VaQVkFJ6TD0ZIfTDA7M9I27JjsZgp2AkeS0zXXYSdS1JZRKjUX+pM2K8 q8TFKUB45/wgaGzMuY7iKtDzyqVW0zmG6w1ZM+lavs1hjXYsZWE4Cvj+6mpCNycM SdAyKnA5uov8InsYxmfpLwORNCZvGbrB8/0F7EPZqELz6b0ehfwoMcXbV5akfUDe 21T+/K/x5HkgF/DHeKRXg/mE5WJTWJGdhhxdDcZZSacG8QrUg2cqdJOgk2ZB0n3/ tv+25jgAPxl1GHLIFdSoAZaNcrIi1pkxysy8XFemxE33sARAIn7dRNBrbwmScqEt ia86X02XkaApztQtmP0W18QBppl0U0ABoTnOCBqpzFnhpNkdz5XsEm5KAq83lzcO jRoHVZVhJLrEMopK46nL =plhx -----END PGP SIGNATURE----- --l5oECiFRo5dp+2y7--