From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gwenn Boussard Subject: Huge performance issues Date: Fri, 17 Jun 2005 14:09:53 +0200 Message-ID: <1119010194.6283.28.camel@ikar> Reply-To: gwenn.boussard@talc.fr Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: Sender: linux-msdos-owner@vger.kernel.org List-Id: Content-Type: text/plain; charset="us-ascii" To: linux-msdos@vger.kernel.org Hi, We've got tens of standard PC's running an old Dos app' with Dosemu (Trustix Linux distrib) since years. Since a year or so, customers start complaining about performance on new machines. In fact browsing the text menu is slow that it's painfull ! A 'top' show that dosemu.bin use constantly 99% of CPU whatever I do. On old machines it soars up to 40% at startup, then go down to 0% during inactivity, and again up to few % during menu browsing. The machines have various kernel and dosemu versions... So I made some tests on two machines, a Fast and a Slow : Put Fast dosemu binary on Slow Put Slow kernel on Fast Put Fast Dos image on Slow Modified Slow dosemu.conf to look like Fast one Verified final binaries were the same on Fast and Slow And some other test I don't remember. Whatever I do Slow stays slow, and Fast stays Fast. There are tests I can't do because Slow is an off-site in production machine, but I feel I tried all steps unsuccessfully. Does anybody see another test I can do, any part that can go wrong ? We don't use sound, nor mouse, just plain Dos emulation with IPX support. Regards, Gwenn