From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264324AbTLPD5r (ORCPT ); Mon, 15 Dec 2003 22:57:47 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264325AbTLPD5r (ORCPT ); Mon, 15 Dec 2003 22:57:47 -0500 Received: from qlink.QueensU.CA ([130.15.126.18]:43239 "EHLO qlink.queensu.ca") by vger.kernel.org with ESMTP id S264324AbTLPD5q (ORCPT ); Mon, 15 Dec 2003 22:57:46 -0500 Subject: Re: HT schedulers' performance on single HT processor From: Nathan Fredrickson <8nrf@qlink.queensu.ca> To: Con Kolivas Cc: Linux Kernel Mailing List In-Reply-To: <1071536102.3fde57e670996@vds.kolivas.org> References: <200312130157.36843.kernel@kolivas.org> <1071431363.19011.64.camel@rocky> <200312152111.52949.kernel@kolivas.org> <1071533802.24673.35.camel@rocky> <1071536102.3fde57e670996@vds.kolivas.org> Content-Type: text/plain Message-Id: <1071547055.24916.14.camel@rocky> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.5 (1.4.5-7) Date: Mon, 15 Dec 2003 22:57:35 -0500 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2003-12-15 at 19:55, Con Kolivas wrote: > Well since you asked... I've been looking for someone with more HT cpus to give > a much simpler approach a try. Here's a sample patch for vanilla test11 with > HT. This one actually helps UP HT performance ever so slightly and I'd be > curious to see if it does anything on more cpus. Not much change with this patch. The new result is most similar to vanilla test11 with HT. Both perform worse than no-HT under partial load. Here are the results from earlier with the new test case appended: X = 1 2 3 4 5 6 7 8 9 16 1phys UP 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 4phys SMP 1.00 0.99 0.51 0.35 0.27 0.27 0.27 0.27 0.27 0.27 4phys HT 1.01 1.00 0.55 0.40 0.33 0.29 0.27 0.26 0.25 0.26 4phys HT(w26) 1.01 1.01 0.54 0.37 0.31 0.27 0.26 0.26 0.26 0.26 4phys HT(C1) 1.01 1.00 0.52 0.36 0.29 0.28 0.27 0.26 0.25 0.26 4phys HT(ht3) 1.01 1.00 0.53 0.39 0.33 0.29 0.27 0.26 0.26 0.26 Nathan