From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from agnes.fremen.dune (bas5-12.idf7-1.club-internet.fr [195.36.255.12]) by front3.grolier.fr (8.9.3/No_Relay+No_Spam_MGC990224) with SMTP id VAA15550 for ; Tue, 6 Feb 2001 21:24:22 +0100 (MET) Message-Id: <200102062024.VAA15550@front3.grolier.fr> Content-Type: text/plain; charset="iso-8859-1" Content-Disposition: inline Content-Transfer-Encoding: 7bit MIME-Version: 1.0 From: Jean Francois Martinez Subject: Another Mindcradt case? Date: 06 Feb 2001 21:25:10 CET Reply-To: Jean Francois Martinez Sender: owner-linux-mm@kvack.org Return-Path: To: linux-mm@kvack.org List-ID: Moshe Barr is claiming on Byte that sendmail and mysql are 30% faster on FreeBSD than Linux 2.4. Now given that I don't think that mysql is spending 30% of its time in kernel mode there are not many ways FreeBSD can be 30% faster. 1) Compiler issues. Moshe Barr does not tell what distrib ha was using so we don't know what distribution was used and with what 2) Driver problems, specally those related to enabling UltraDma since without UltraDMA most disks are both very slow and CPU hogs. 3) Options not enabled. This a 2.2 Linux distrib with a 2.4 keernel plastered on it and thus software has not been compiled to take advantage of 2.4bfeatures and the boot sequence does not do a good job of tuning the kernel through sysctl 4) Memory management. If FreeBSD is smarter than Linux about which page to thow out it will be _much_ faster when memory is tight. Now what about a Mindcraft-style reaction? Check what was wrong in the test protocol, write an answer if it was due to the test and in case it was not the test but a perfomance bottleneck fix it. Moshe (and a few other people will do the same) was wondering why to stay with Linux so better fix the problems if we want Linux and not BSD reaching world domination. JF Martinez -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux.eu.org/Linux-MM/