Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755435Ab3EZW7o (ORCPT ); Sun, 26 May 2013 18:59:44 -0400 Received: from mail-vb0-f53.google.com ([209.85.212.53]:62206 "EHLO mail-vb0-f53.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755372Ab3EZW7n (ORCPT ); Sun, 26 May 2013 18:59:43 -0400 MIME-Version: 1.0 In-Reply-To: <1369601453.2259.15.camel@buesod1.americas.hpqcorp.net> References: <1369559335-13491-1-git-send-email-manfred@colorfullife.com> <1369601453.2259.15.camel@buesod1.americas.hpqcorp.net> Date: Sun, 26 May 2013 15:59:42 -0700 X-Google-Sender-Auth: Ie264op6CMMBYjSj_Ay93WMgZiA Message-ID: Subject: Re: [PATCH 0/4] ipc/sem.c: Bug fixes, regression fixes, v3 From: Linus Torvalds To: Davidlohr Bueso Cc: Manfred Spraul , Rik van Riel , LKML , Andrew Morton , Hai Huang Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 787 Lines: 18 On Sun, May 26, 2013 at 1:50 PM, Davidlohr Bueso wrote: > > In lack of getting my swingbench DSS environment back, I ran these > changes against the semop-multi program on my laptop. For 256 threads, > with Manfred's patchset the ops/sec suffers around -7.3%. Hmm. That test program only tests simple ops, right? So the slowdown comes from either the code simply being that much slower due to extra complexity, or from the fair wakeups.. Anyway, I applied 1/4, we can continue to discuss the rest. Linus -- 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/