From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755182AbaE1RsB (ORCPT ); Wed, 28 May 2014 13:48:01 -0400 Received: from mga09.intel.com ([134.134.136.24]:38231 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751338AbaE1Rr7 (ORCPT ); Wed, 28 May 2014 13:47:59 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.98,929,1392192000"; d="scan'208";a="519174431" Date: Wed, 28 May 2014 10:47:58 -0700 From: Andi Kleen To: Stephane Eranian Cc: Peter Zijlstra , "Yan, Zheng" , LKML , "mingo@elte.hu" Subject: Re: [RFC PATCH 6/7] perf, x86: large PEBS interrupt threshold Message-ID: <20140528174758.GO29957@tassilo.jf.intel.com> 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> <20140528172540.GM29957@tassilo.jf.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > That's a plausible scenario if you consider two distinct sessions of a tool, > i.e., two users running perf top or perf record some precise events. Then they will start at different times (if they are not on different cores), so it's still not synchronized and unlikely to meet. |----< 1000+ > -----| A |------< 1000+> ------| B -Andi