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Full Discussion: Need to understand CPU capping in Zones
Operating Systems Solaris Need to understand CPU capping in Zones Post 302908462 by sb200 on Tuesday 8th of July 2014 04:40:22 AM
Old 07-08-2014
Need to understand CPU capping in Zones
Hi All

I am using below command to do zone capping

#zonecfg -z zone1
zonecfg:zone1>
zonecfg:zone1>add capped-cpu
zonecfg:zone1>capped-cpu> set ncpus=2
zonecfg:zone1>capped-cpu> end
zonecfg:zone1> commit
zonecfg:zone1> exit

It means that it can used two CPUs in zone1 then I run CPUHUNGRY shell script to get the CPU utilized. When I am checking in prstat -a command it shows that it is using more than two CPUs. When I am running psrinfo -v command in that zone it show 128CPUs. Please find prstat output.

Code:
   PID USERNAME  SIZE   RSS STATE  PRI NICE      TIME  CPU PROCESS/NLWP
 22927 root     4408K 1824K cpu46   34    0   0:00:53 0.1% cpuhungry/1
 22929 root     4408K 1824K wait    16    0   0:00:52 0.1% cpuhungry/1
 22910 root     4408K 1824K cpu32   39    0   0:00:43 0.1% cpuhungry/1
 22912 root     4408K 1824K wait    15    0   0:00:56 0.1% cpuhungry/1
 22909 root     4408K 1824K cpu83   39    0   0:00:38 0.1% cpuhungry/1
 22917 root     4408K 1824K wait    16    0   0:00:38 0.1% cpuhungry/1
 22914 root     4408K 1824K wait    12    0   0:00:39 0.0% cpuhungry/1
 22908 root     4408K 1824K wait    17    0   0:00:44 0.0% cpuhungry/1
 22906 root     4416K 2992K wait    32    0   0:00:40 0.0% cpuhungry/1
 22916 root     4408K 1824K wait    32    0   0:00:45 0.0% cpuhungry/1
 22928 root     4408K 1824K wait    17    0   0:00:51 0.0% cpuhungry/1
 22907 root     4408K 1952K wait     1    0   0:00:48 0.0% cpuhungry/1
 22913 root     4408K 1824K wait    30    0   0:00:42 0.0% cpuhungry/1
 22911 root     4408K 1824K wait    11    0   0:00:36 0.0% cpuhungry/1
 22930 root     4408K 1824K wait    15    0   0:00:34 0.0% cpuhungry/1
 22931 root     4408K 1824K wait    24    0   0:00:40 0.0% cpuhungry/1
 22915 root     4408K 1824K wait    28    0   0:00:34 0.0% cpuhungry/1
 23692 root     4088K 2408K sleep   59    0   0:00:00 0.0% snmpXdmid/2
 23295 root       23M 6552K sleep   50    0   0:00:03 0.0% inetd/4
 23231 daemon   5144K 1688K sleep   58    0   0:00:00 0.0% nfsmapid/3
 23542 root     3264K 2360K sleep   59    0   0:00:00 0.0% automountd/2
 23778 root     6552K 1928K sleep   57    0   0:00:00 0.0% dtlogin/1
 23541 root     2984K 1584K sleep   59    0   0:00:00 0.0% automountd/2
 23220 daemon   2824K 1600K sleep   59    0   0:00:00 0.0% nfs4cbd/2
 23293 root     1720K 1080K sleep   58    0   0:00:00 0.0% utmpd/1
 23243 daemon   2792K 1600K sleep   52    0   0:00:00 0.0% lockd/2
 22743 root       12M 5736K sleep   59    0   0:00:21 0.0% svc.configd/20
 22999 daemon     10M 6048K sleep   59    0   0:00:15 0.0% rcapd/1
 23546 root     4616K 1488K sleep   59    0   0:00:00 0.0% sshd/1
 24546 noaccess  155M   88M sleep   59    0   0:00:55 0.0% java/17
 24407 smmsp      10M 1520K sleep   59    0   0:00:00 0.0% sendmail/1
 22806 root     3496K 2864K sleep   59    0   0:00:00 0.0% bash/1
 22943 root     7344K 4464K sleep   50    0   0:00:00 0.0% nscd/30
 23290 root     2424K 1200K sleep   59    0   0:00:00 0.0% smcboot/1
 22739 root     3024K 1736K sleep   59    0   0:00:00 0.0% init/1
 23294 root     2512K 1560K sleep   59    0   0:00:00 0.0% sac/1
 22741 root       32M   11M sleep   29    0   0:00:10 0.0% svc.startd/13
 23691 root     3720K 1592K sleep   59    0   0:00:00 0.0% dmispd/1
 23216 daemon   3264K 2304K sleep   59    0   0:00:00 0.0% rpcbind/1
 23663 root     2912K 1736K sleep   59    0   0:00:00 0.0% snmpdx/1
 23289 root     2424K 1208K sleep   59    0   0:00:00 0.0% smcboot/1
 23305 root     2856K 1664K sleep   59    0   0:00:00 0.0% ttymon/1
 NPROC USERNAME  SWAP   RSS MEMORY      TIME  CPU
    44 root       93M   50M   0.1%   0:12:47 0.7%
     1 noaccess  148M   97M   0.1%   0:00:55 0.0%
     1 smmsp    2920K 5824K   0.0%   0:00:00 0.0%
     7 daemon     12M   13M   0.0%   0:00:15 0.0%


If I used dedicated-cpu syntax instead of capped-cpu then I can see only two processors in prtstat -a & psrinfo -v command also.


My server configuration is having 2 Physical having 8 core each & each core having 8 threads means 128 CPU in term OS.

Please let me know where I went wrong in case of capped-cpu syntax
 

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