I wouldn't find this terribly surprising. Rendering graphics is pretty CPU intensive, after all, so if they're working in graphics, they're probably not going to be extremely happy with Linux/390. By any chance do they have an IEEE floating point unit on that box? If not, that would be perhaps the main problem. Rendering graphics uses a lot of floating point CPU.
Mark Post -----Original Message----- From: David Kreuter [mailto:[EMAIL PROTECTED] Sent: Tuesday, January 13, 2004 6:13 PM To: [EMAIL PROTECTED] Subject: Xwindows performance on zvm Hi: A client experiences intermittent significant performance slowdowns using xwindows. Environment is zvm 4.4, suse sles8 kernel 2.4.19 windows server is 6.00.191. I was luck to catch a glimpse of this today, and from the zvm perspective the CPU of the linux server spiked from about 10% to over 80% for a few minutes, and then suddenly the lights went from dim to lit on the xwindows client. Nothing else was running on the box at the time other than vm tcpip. There was as far as I can tell nothing untowards happening in zvm tcpip, paging was negligible, dasd i/o was negligible. User says it seems to happen displaying a file "for the first time". Subsequent xwindows display of the files "are faster". IS this a caching issue in linux? Any other ideas? Thanks! David Kreuter
