Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753445Ab1BIJ2j (ORCPT ); Wed, 9 Feb 2011 04:28:39 -0500 Received: from bombadil.infradead.org ([18.85.46.34]:32960 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751512Ab1BIJ2h (ORCPT ); Wed, 9 Feb 2011 04:28:37 -0500 Subject: Re: Misc sd_idle related fixes From: Peter Zijlstra To: Venkatesh Pallipadi Cc: Suresh Siddha , Ingo Molnar , linux-kernel@vger.kernel.org, Paul Turner , Mike Galbraith , Nick Piggin In-Reply-To: <1297188819-19999-1-git-send-email-venki@google.com> References: <1297188819-19999-1-git-send-email-venki@google.com> Content-Type: text/plain; charset="UTF-8" Date: Wed, 09 Feb 2011 10:29:38 +0100 Message-ID: <1297243778.13327.143.camel@laptop> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 722 Lines: 14 On Tue, 2011-02-08 at 10:13 -0800, Venkatesh Pallipadi wrote: > Here are the 3 sd_idle related changes I tested with, for reference. Among > the three, the third patch is the one that helps us in reducing idle cycles > with one of our workloads and thus improves the latency response. Have you tried what happens if you simply rip all that SMT stuff out and simplify the code? Afaict much of the capacity stuff we have should have a similar effect and is less confusing, no? -- 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/