Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753389Ab3IJMvp (ORCPT ); Tue, 10 Sep 2013 08:51:45 -0400 Received: from mail-bk0-f42.google.com ([209.85.214.42]:49931 "EHLO mail-bk0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752809Ab3IJMvm (ORCPT ); Tue, 10 Sep 2013 08:51:42 -0400 MIME-Version: 1.0 In-Reply-To: References: <20130903132933.GA24955@gmail.com> <20130909100544.GI31370@twins.programming.kicks-ass.net> <20130910115306.GA6091@gmail.com> From: Ramkumar Ramachandra Date: Tue, 10 Sep 2013 18:21:00 +0530 Message-ID: Subject: Re: PEBS bug on HSW: "Unexpected number of pebs records 10" (was: Re: [GIT PULL] perf changes for v3.12) To: eranian@gmail.com Cc: Ingo Molnar , Peter Zijlstra , Linus Torvalds , Linux Kernel Mailing List , Arnaldo Carvalho de Melo , Thomas Gleixner , Andi Kleen Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 491 Lines: 12 Stephane Eranian wrote: > a simple multithreaded program where > #threads >> #CPUs To put it another way, does Intel's HT work for CPU intensive and IO minimal tasks? I think HT assumes some amount of inefficient IO coupled with pure CPU usage. -- 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/