From mboxrd@z Thu Jan 1 00:00:00 1970 From: jayabrata_c@dataone.in Subject: Interrupt latency benchmark Date: Mon, 09 Jul 2007 02:40:16 +1000 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7BIT To: linux-rt-users@vger.kernel.org Return-path: Received: from bglbbmr1-a-fixed.dataone.in ([218.248.240.59]:43156 "EHLO bglbbmr1.dataone.in" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753262AbXGHQkr (ORCPT ); Sun, 8 Jul 2007 12:40:47 -0400 Received: from dataone.in ([10.16.18.23]) by bglbbmr1.dataone.in (Sun Java System Messaging Server 6.2-6.01 (built Apr 3 2006)) with ESMTP id <0JKV00JHPCRKI700@bglbbmr1.dataone.in> for linux-rt-users@vger.kernel.org; Sun, 08 Jul 2007 22:05:44 +0530 (IST) Content-language: en Content-disposition: inline Sender: linux-rt-users-owner@vger.kernel.org List-Id: linux-rt-users.vger.kernel.org Hello All, I have a query, Can i use Realfeel benchmark tool, to test the interrupt latency on an smp machine. I have a non-smp machine, on which i tested the 2.6.19-rt11 kernel, and i got very impressive interrupt latency (< 30 us, with tests carried over 10 hours, on heavy load). But i am not getting the same performance on an smp machine, which i recently acquired. I used the latest 2.6.21.5-rt19 kernel. But still the same results. Am i doing something wrong, or is Realfeel not meant for smp? In that case, which tool can i use? I have used the Realfeel tool from the amlat package. Regards Jayabrata