From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.12] helo=sc8-sf-mx2.sourceforge.net) by sc8-sf-list1.sourceforge.net with esmtp (Exim 4.30) id 1BsiMp-0004sZ-EH for user-mode-linux-devel@lists.sourceforge.net; Thu, 05 Aug 2004 06:33:11 -0700 Received: from firewall.seawaynetworks.com ([216.209.86.50] helo=apollo.seawaynetworks.com) by sc8-sf-mx2.sourceforge.net with esmtp (Exim 4.34) id 1BsiMo-000172-Ow for user-mode-linux-devel@lists.sourceforge.net; Thu, 05 Aug 2004 06:33:11 -0700 Received: from camelot-054 (camelot-054 [10.10.1.54]) by apollo.seawaynetworks.com (8.12.8/8.12.8) with ESMTP id i75DWxcP026976 for ; Thu, 5 Aug 2004 09:32:59 -0400 (EDT) Subject: Re: [uml-devel] Q: UML thread communication - scheduling oddness In-reply-to: <200408050020.i750Kwvv009127@ccure.user-mode-linux.org> References: <411142B4.7000603@nortelnetworks.com> <200408050020.i750Kwvv009127@ccure.user-mode-linux.org> Mime-Version: 1.0 (generated by tm-edit 1.8) Content-Type: text/plain; charset=US-ASCII Message-ID: <2423.1091712695@camelot-054> From: Michael Richardson Sender: user-mode-linux-devel-admin@lists.sourceforge.net Errors-To: user-mode-linux-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Id: The user-mode Linux development list List-Post: List-Help: List-Subscribe: , List-Archive: Date: Thu, 05 Aug 2004 09:31:35 -0400 To: user-mode-linux-devel@lists.sourceforge.net -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 >>>>> "Jeff" == Jeff Dike writes: Jeff> gmarzot@nortelnetworks.com said: >> That is, if I run a little busy loop /mnt/plankton/stress --cpu 1 >> --io 1 on the server side, the round trip time for messages is >> greatly *improved*. without this activity and a basically dormant >> server side UML the round trip times show considerable variabilty >> with gaps on the order of seconds. Jeff> How's this for a theory: The server's host is short on memory. Jeff> A UML which is answering pings every second or so can be The theory is sound to me. The host doesn't have to be short on memory for this to happen either. It suffices for there to be things that are groverling through the file systems, and pulling in disk pages for processes to get swapped out. - -- ] ON HUMILITY: to err is human. To moo, bovine. [ ] Michael Richardson, Seaway Networks Corporation [ ] michael@seawaynetworks.com http://www.seawaynetworks.com/ [ ] panic("Just another Debian GNU/Linux using, kernel hacking, security guy"); [ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (GNU/Linux) Comment: Finger me for keys iD8DBQFBEjaY22r3dfT9QZERArj+AKDsuVgBPeYb1goRZ0mB2ITUXrivswCgnJ5h 4sjmXFb/Y+wdPFpTgEnC+98= =CjU1 -----END PGP SIGNATURE----- ------------------------------------------------------- This SF.Net email is sponsored by OSTG. Have you noticed the changes on Linux.com, ITManagersJournal and NewsForge in the past few weeks? Now, one more big change to announce. We are now OSTG- Open Source Technology Group. Come see the changes on the new OSTG site. www.ostg.com _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel