From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263658AbUDTRna (ORCPT ); Tue, 20 Apr 2004 13:43:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263141AbUDTRna (ORCPT ); Tue, 20 Apr 2004 13:43:30 -0400 Received: from e2.ny.us.ibm.com ([32.97.182.102]:50066 "EHLO e2.ny.us.ibm.com") by vger.kernel.org with ESMTP id S263658AbUDTRn2 (ORCPT ); Tue, 20 Apr 2004 13:43:28 -0400 Subject: sched_domains and Stream benchmark From: Darren Hart To: lkml Cc: ak@suse.de Content-Type: text/plain Message-Id: <1082482996.2711.17.camel@farah> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.6 Date: Tue, 20 Apr 2004 10:43:17 -0700 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Andi, You have mentioned the stream benchmark when reporting on the performance of the Opteron NUMA sched-domains scheduler. I am trying to reproduce your results and am struggling with the benchmark. Can you rpovide the details of the tests you ran. Namely your compiler settings, compile command line, and your value of N. Also I didn't see how to specify the number of threads to run, how did you specify that? I have a 4 way 1.4 GHz 1MB cache opteron machine with 7 GB of RAM. When I ran the steeam_omp benchmark with N=4000000 I got nearly identical results (within statistical noise) from 2.6.5, 2.6.5-mm5, and 2.6.5-mm5-with_flat_domains (the patch I sent earlier). Clearly not what is expected, so I assume I am not running or building the benchmark correctly. I found the projects build system (none) and docs (minimal) to be lacking. You mentioned your problem was fixed by some of "Ingo's tweaks". Which patches are these tweaks in and are they in the mm tree yet? Thanks, Darren