Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758372AbZIGA2Z (ORCPT ); Sun, 6 Sep 2009 20:28:25 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758227AbZIGA2Z (ORCPT ); Sun, 6 Sep 2009 20:28:25 -0400 Received: from mail-pz0-f192.google.com ([209.85.222.192]:44051 "EHLO mail-pz0-f192.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752982AbZIGA2Y (ORCPT ); Sun, 6 Sep 2009 20:28:24 -0400 Subject: Re: question on sched-rt group allocation cap: sched_rt_runtime_us Mime-Version: 1.0 (Apple Message framework v1075.2) Content-Type: text/plain; charset=us-ascii; format=flowed; delsp=yes From: Anirban Sinha In-Reply-To: Date: Sun, 6 Sep 2009 17:28:23 -0700 Cc: Anirban Sinha Content-Transfer-Encoding: 7bit Message-Id: References: To: Anirban Sinha , Dario Faggioli , a.p.zijlstra@chello.nl, Ingo Molnar , linux-kernel@vger.kernel.org, Fabio Checconi X-Mailer: Apple Mail (2.1075.2) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 984 Lines: 36 > Dunno. Fly or die little patchlet (toss). > sched: allow the user to disable RT bandwidth aggregation. Hmm. Interesting. With this change, my results are as follows: rt_runtime/rt_period % of reg iterations 0.2 100% 0.25 100% 0.3 100% 0.4 100% 0.5 82% 0.6 66% 0.7 54% 0.8 46% 0.9 38.5% 0.95 32% This results are on a quad core blade. Does it still makes sense though? Can anyone else run the same tests on a quadcore over the latest kernel? I will patch our 2.6.26 kernel with upstream fixes and rerun these tests on tuesday. Ani -- 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/