From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264939AbTFCGZM (ORCPT ); Tue, 3 Jun 2003 02:25:12 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264940AbTFCGZM (ORCPT ); Tue, 3 Jun 2003 02:25:12 -0400 Received: from c17870.thoms1.vic.optusnet.com.au ([210.49.248.224]:7557 "EHLO mail.kolivas.org") by vger.kernel.org with ESMTP id S264939AbTFCGZL convert rfc822-to-8bit (ORCPT ); Tue, 3 Jun 2003 02:25:11 -0400 From: Con Kolivas To: linux kernel mailing list Subject: [BENCHMARK] 100Hz preempt v nopreempt contest results Date: Tue, 3 Jun 2003 16:39:15 +1000 User-Agent: KMail/1.5.1 Cc: Zwane Mwaikambo , Robert Love MIME-Version: 1.0 Content-Type: Text/Plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT Content-Description: clearsigned data Content-Disposition: inline Message-Id: <200306031639.49515.kernel@kolivas.org> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Here are contest results on the same kernel 2.5.70-mm3 set to 100Hz with (2.5.70-mm31) and without (2.5.70-mm3n) preempt. no_load: Kernel [runs] Time CPU% Loads LCPU% Ratio 2.5.70-mm31 1 77 94.8 0.0 0.0 1.00 2.5.70-mm3n 1 79 94.9 0.0 0.0 1.00 cacherun: Kernel [runs] Time CPU% Loads LCPU% Ratio 2.5.70-mm31 1 74 98.6 0.0 0.0 0.96 2.5.70-mm3n 1 76 98.7 0.0 0.0 0.96 process_load: Kernel [runs] Time CPU% Loads LCPU% Ratio 2.5.70-mm31 2 107 69.2 67.0 29.0 1.39 2.5.70-mm3n 2 137 53.3 133.5 45.3 1.73 ctar_load: Kernel [runs] Time CPU% Loads LCPU% Ratio 2.5.70-mm31 3 105 73.3 0.7 3.8 1.36 2.5.70-mm3n 3 105 73.3 0.7 3.8 1.33 xtar_load: Kernel [runs] Time CPU% Loads LCPU% Ratio 2.5.70-mm31 3 122 61.5 2.0 4.9 1.58 2.5.70-mm3n 3 113 65.5 2.0 4.4 1.43 io_load: Kernel [runs] Time CPU% Loads LCPU% Ratio 2.5.70-mm31 4 114 65.8 41.0 19.3 1.48 2.5.70-mm3n 4 112 67.0 41.1 18.8 1.42 io_other: Kernel [runs] Time CPU% Loads LCPU% Ratio 2.5.70-mm31 2 112 67.9 46.1 21.4 1.45 2.5.70-mm3n 2 112 67.0 46.0 20.4 1.42 read_load: Kernel [runs] Time CPU% Loads LCPU% Ratio 2.5.70-mm31 2 100 76.0 7.5 7.0 1.30 2.5.70-mm3n 2 101 75.2 7.6 5.9 1.28 list_load: Kernel [runs] Time CPU% Loads LCPU% Ratio 2.5.70-mm31 2 92 82.6 0.0 5.4 1.19 2.5.70-mm3n 2 94 79.8 0.0 6.4 1.19 mem_load: Kernel [runs] Time CPU% Loads LCPU% Ratio 2.5.70-mm31 2 95 81.1 53.0 2.1 1.23 2.5.70-mm3n 2 94 80.9 52.0 2.1 1.19 dbench_load: Kernel [runs] Time CPU% Loads LCPU% Ratio 2.5.70-mm31 4 297 24.9 4.5 52.5 3.86 2.5.70-mm3n 4 292 25.7 4.5 52.4 3.70 Note this time the ratio is less useful since they are both 100Hz. The difference this time shows a large preempt improvement in process_load much like 1000Hz did. Interestingly, even unloaded kernels no_load and cache_load runs are faster with preempt. Only in xtar_load (repeatedly extracting a tar with multiple small files) was no preempt faster. Con -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) iD8DBQE+3EKfF6dfvkL3i1gRAjFpAKCpeVUOpCXd1xHrKYhEkeOYhuD1swCgmyRQ NBf56mnwS02WY9wJ9FHctg0= =cLte -----END PGP SIGNATURE-----