From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751793AbcCARc6 (ORCPT ); Tue, 1 Mar 2016 12:32:58 -0500 Received: from one.firstfloor.org ([193.170.194.197]:57083 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751162AbcCARc5 (ORCPT ); Tue, 1 Mar 2016 12:32:57 -0500 Date: Tue, 1 Mar 2016 18:32:54 +0100 From: Andi Kleen To: Jiri Olsa Cc: Peter Zijlstra , Andi Kleen , "Liang, Kan" , Arnaldo Carvalho de Melo , Ingo Molnar , Stephane Eranian , Wang Nan , "zheng.z.yan@intel.com" , LKML Subject: Re: [BUG] Core2 cpu triggers hard lockup with perf test Message-ID: <20160301173254.GT5083@two.firstfloor.org> References: <20160227123636.GB30858@krava.redhat.com> <37D7C6CF3E00A74B8858931C1DB2F0770589EC94@SHSMSX103.ccr.corp.intel.com> <20160301091703.GN6356@twins.programming.kicks-ass.net> <20160301110651.GA15260@krava.redhat.com> <20160301145105.GQ5083@two.firstfloor.org> <20160301145909.GS6356@twins.programming.kicks-ass.net> <20160301171722.GA2666@krava.redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160301171722.GA2666@krava.redhat.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > I tried what Andy suggested below (not sure what he meant by Merom, > I took PEBS format0 instead), works for me Thanks Jiri. Patch looks good to me. Reviewed-by: Andi Kleen We may want to make this buffer size a configurable anyways because with multi-record PEBS it can make sense to use much larger buffers to reduce overhead. But that could be done separately. -Andi