Interesting thought, but the cpu it never 100% utilized when the testing is taking place. At the higher end testing (21 to 24 dbench clients) it gets up there around 80%.. but never 100%.
- Jason Herne On Wed, 2003-12-10 at 21:07, Barton Robinson wrote: > I would say your two questions are very much related. > I'm betting that your processor on your z/800 is maxed out. > And since the intel processor is approximately 3 times faster > than your z/800, guess what, it performs that much more work. > More cycles allows for more work. > > > > > > >I think we may have a performance problem. > > > >Our z/800 model 0LF is connected to an ESS800 with two Ficon channel > >paths. We have been running dbench in Linux for quite a few weeks now > >and we are seeing numbers much lower than we expected. Can someone > >commnet on this? Are these numbers about what we should be seeing, or > >is something wrong with our setup? > > > >We're running RHEL with kernel 2.4.21-1.1931.2.399.ent #1 SMP. Linux is > >using a single 3390 DASD with ext3. > > > >Here are the numbers we're getting: > >all tests were run on a single guest with no other Linux guests and just > >a few z/VM service guests running. No disk intestive or CPU intensive > >workload was running during the testing. > > > >dbench clients avg throughout (MB/s) > >1 123.111 > >3 116.729 > >6 99.0626 > >9 95.3577 > >12 95.2825 > >15 91.6009 > >18 92.7745 > >21 91.8808 > >24 73.8885 > > > > > >Here is what we get with our $1000 Dell Pentiium 2.4Ghz server with a > >SCSI disk. > > > >1 395.545 > >3 281.957 > >6 275.292 > >9 285.756 > >12 262.4333 > >15 248.314 > >18 237.879 > >21 221.74355 > >24 200.873 > > > > > >As you can see, the $1k Dell is hammering our $250k mainframe. We are > >currently trying to figure out why this is and hopefully fix the problem > >if there is indeed a problem... Any comments or help that anyone could > >give woule be appreciated. > > > >- Jason Herne ([EMAIL PROTECTED]) > > Clarkson University Open Source Institute > > z/Server Administrator > > > > > > > > "If you can't measure it, I'm Just NOT interested!"(tm) > > /************************************************************/ > Barton Robinson - CBW Internet: [EMAIL PROTECTED] > Velocity Software, Inc Mailing Address: > 196-D Castro Street P.O. Box 390640 > Mountain View, CA 94041 Mountain View, CA 94039-0640 > > VM Performance Hotline: 650-964-8867 > Fax: 650-964-9012 Web Page: WWW.VELOCITY-SOFTWARE.COM > /************************************************************/
