Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932258AbbEUMxS (ORCPT ); Thu, 21 May 2015 08:53:18 -0400 Received: from casper.infradead.org ([85.118.1.10]:41453 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754286AbbEUMxR (ORCPT ); Thu, 21 May 2015 08:53:17 -0400 Date: Thu, 21 May 2015 14:53:12 +0200 From: Peter Zijlstra To: Stephane Eranian Cc: Ingo Molnar , Vince Weaver , Jiri Olsa , LKML Subject: Re: [PATCH 00/10] Various x86 pmu scheduling patches Message-ID: <20150521125312.GN3644@twins.programming.kicks-ass.net> References: <20150521111710.475482798@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: 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 Content-Length: 985 Lines: 22 On Thu, May 21, 2015 at 04:48:16AM -0700, Stephane Eranian wrote: > Peter, > > On Thu, May 21, 2015 at 4:17 AM, Peter Zijlstra wrote: > > > > Unless I messed things up again, patch 1 and 2 are for perf/urgent and the rest > > can wait. > > > > I would still like to relax the HT scheduling constraint in case there are no > > funny events at all, but I've not yet found a nice way to do that. > > > Are you talking about the HT bug workaround? If there is no > corrupting event across HT threads, then scheduling is not impacted. It is, commit c02cdbf60b51 ("perf/x86/intel: Limit to half counters when the HT workaround is enabled, to avoid exclusive mode starvation") is active irrespective of any active events. -- 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/