Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757428Ab2EHDUZ (ORCPT ); Mon, 7 May 2012 23:20:25 -0400 Received: from cantor2.suse.de ([195.135.220.15]:36452 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752941Ab2EHDUY (ORCPT ); Mon, 7 May 2012 23:20:24 -0400 Message-ID: <1336447221.7364.2.camel@marge.simpson.net> Subject: Re: [PATCH] clockevents: Per cpu tick skew boot option From: Mike Galbraith To: Thomas Gleixner Cc: LKML Date: Tue, 08 May 2012 05:20:21 +0200 In-Reply-To: References: <1336309127.7351.13.camel@marge.simpson.net> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3 Content-Transfer-Encoding: 7bit Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 846 Lines: 22 On Mon, 2012-05-07 at 21:17 +0200, Thomas Gleixner wrote: > On Sun, 6 May 2012, Mike Galbraith wrote: > > > > + skew_tick= [KNL] Offset the periodic timer tick per cpu to mitigate > > + xtime_lock contention on larger systems. Note: increases > > + power consumption, and should only be enabled if running > > + jitter sensitive (HPC/RT) workloads. > > + > > The "=" is wrong as skew_tick should not take parameters. It's > disabled by default. So "skew_tick" simply enables it, right ? Unless as I have RT set up, it's turned on by default, so '=' lets the user turn it back off. -Mike -- 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/