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.
