I meant to say 'if it is greater than 1ms then I would set it to 1ms'. Sorry, the greater than symbol got lost....
> -----Original Message----- > From: Duff Sr., David [mailto:[EMAIL PROTECTED]] > Sent: Friday, February 14, 2003 9:13 AM > To: [EMAIL PROTECTED] > Subject: Re: URGENT! really low performance. > > > Alex, > > I think that if it were me, I would first look to see what my > dispatch minor > time slice is. If it is 1ms then I would set it to 1ms and > see if that is > adequate. Second, and I am not sure if this is even someting > that can be > done in PRSM with an IFL on a z/800 (someone else on the list > may know), I > would (if possible) set wait completion to off to allow a > higher degree of > virtual machine interlace. And last, I think that I would remove the > absolute settings that Linux has and let the VM > scheduler/dispatcher do > their marvelous work. I would do each of the above as > separate steps and > evaluate each after completion. > > :>)) > > > -----Original Message----- > > From: Alex Leyva [mailto:[EMAIL PROTECTED]] > > Sent: Thursday, February 13, 2003 4:10 PM > > To: [EMAIL PROTECTED] > > Subject: URGENT! really low performance. > > > > > > Hi all, i have a problem, we have a z800, the configuration is: > > 1 cp 80 MIPS > > 1 IFL > > 8 Gb storage > > 3 partitions: > > -os/390 2.6 > > -os/390 2.6 > > -z/vm 4.3 > > 840 gb (shark) > > > > the cp is dedicated to both os/390, and the ifl to z/vm, 2gb to > > both os/390, and 6 gb to z/vm. > > > > Redhat 7.2 as a z/vm guest: > > > > [root@linux1 root]# uname -a > > Linux linux1.xxx.xxx.xxx 2.4.9-38lvm #1 SMP mii feb 12 12:25:01 CST > > 2003 s390 unknown > > [root@linux1 s390]# cat /proc/cpuinfo > > vendor_id : IBM/S390 > > # processors : 1 > > bogomips per cpu: 630.78 > > processor 0: version = FF, identification = 02900A, machine = 2066 > > [root@linux1 s390]# cat /proc/meminfo > > total: used: free: shared: buffers: cached: > > Mem: 1045737472 364187648 681549824 0 15532032 317743104 > > Swap: 409821184 0 409821184 > > > > > > Default installation, the z/vm has one week installed: > > > > q cplevel > > z/VM Version 4 Release 3.0, service level 0201 (64-bit) > > Generated at 05/09/02 17:30:26 EST > > IPL at 02/07/03 12:13:53 EST > > > > when we make a tar -gzipping it- from a directory with > 100Mb, we have > > that: > > -the hmc indicates that the ifl is at 99% utilization. > > -real time monitor indicates that the processor is at 99% > utilization: > > | <USERID> %CPU %CP %EM ISEC PAG WSS RES UR PGES SHARE > > VMSIZE TYP,CHR,STAT | > > | LINUX1 99 .15 99 4.4 .00 100K 100K .0 1 50%A > > 1G VUS,QDS,DISP | > > | SYSTEM .08 .08 .00 .00 .00 0 5060 .0 536 ..... > > 2G SYS, | > > | VMRTM .02 .01 .01 .63 .00 462 483 .0 0 3%A > > 32M VUS,IAB,SIMW | > > -"top" at the linux shows: > > 30 processes: 27 sleeping, 3 running, 0 zombie, 0 stopped > > CPU states: 97.6% user, 2.3% system, 0.0% nice, 0.0% idle > > Mem: 1021228K av, 279636K used, 741592K free, 0K > > shrd, 14120K buff > > Swap: 400216K av, 0K used, 400216K free > > 234992K cached > > > > we apply some performance related commands like: > > set quickdsp linux1 on real > > set share linux1 relative 300 real > > set share linux1 absolute 50% real > > > > and the time went from 1m3.6s to 1m2.039s in the better case, > > the people > > from ibm (they are here yet) can give me an answer about the poor > > performance (i consider that its a poor performance, because > > a intel piii > > 128Mb RAM make the tar in about 28s), so i really dont know > > if this is the > > real performance of linux under vm, if we are doing something > > wrong, or > > what, when we bought the z800 they said that with this > > configuration we > > will be able to run about 200 virtual machinnes, maybe > thats a fairly > > dream? > > > > Please, i accept any comments, sugestions, or anything that > > can help us. > > > > Thanks. > > > > > > -- > > Alejandro Leyva Rabinovich. > > Jefe de la Unidad Departamental de Soporte Ticnico > > (Administracisn de Mainframe). > > Direccisn General de Informatica. > > Secretarma de Finanzas. > > Gobierno del Distrito Federal. > > >
