How to create new CPU resource pool in Solaris

Solaris 10 has many resource control model. Here we are going to see how to create new processor pool and how to associate processor set to it.Resource pools enable you to separate workloads so that workload consumption of certain resources does not overlap.
For an example, specific user process or specific application  process are consuming high CPU usage and  if you want to restrict those process to specific processors using pool.

So that specific  high CPU consumption process will not overload other CPU’s since we have bind the process to specific process. 

Processor information:

Arena-Node1#psrinfo -p
1
Arena-Node1#psrinfo
0       on-line   since 07/30/2012 01:45:54
1       on-line   since 07/30/2012 01:45:58

Checking the current pool configuration:

Arena-Node2#pooladm
pooladm: couldn't open pools state file: Facility is not active.

Activating the pool using the below command:

Arena-Node1#pooladm -e
Checking the current pool configuration.
Arena-Node1#pooladm
system default
        string  system.comment
        int     system.version 1
        boolean system.bind-default true
        string  system.poold.objectives wt-load
        pool pool_default
                int     pool.sys_id 0
                boolean pool.active true
                boolean pool.default true
                int     pool.importance 1
                string  pool.comment
                pset    pset_default
        pset pset_default
                int     pset.sys_id -1
                boolean pset.default true
                uint    pset.min 1
                uint    pset.max 65536
                string  pset.units population
                uint    pset.load 234
                uint    pset.size 2
                string  pset.comment
                cpu
                        int     cpu.sys_id 1
                        string  cpu.comment
                        string  cpu.status on-line
           cpu
                        int     cpu.sys_id 0
                        string  cpu.comment
                        string  cpu.status on-line

#poolcfg -c 'create pset arenazone-pset(uint pset.min=1;uint pset.max = 1)'
poolcfg: cannot load configuration from /etc/pooladm.conf: No such file or directory.

To save the current pool configuration.

Arena-Node1#pooladm -s

The above command will create /etc/pooladm.conf.

Arena-Node1#poolcfg -c 'create pset arenazone-pset(uint pset.min=1; uint pset.max=1)'

The above command created the pset with one processor core in the name of arenazone-pset.

Creating  the new pool called arenazone-pool

Arena-Node1#poolcfg -c 'create pool arenazone-pool'

Associating the arenazone-pset with arenazone-pool

Arena-Node1#poolcfg -c 'associate pool arenazone-pool(pset arenazone-pset)'

Now have processor pool with one CPU core.

Instantiate the configuration

Arena-Node1#pooladm -c

To verify the configuration

Arena-Node1#pooladm
system default
        string  system.comment
        int     system.version 1
        boolean system.bind-default true
        string  system.poold.objectives wt-load
        pool pool_default
                int     pool.sys_id 0
                boolean pool.active true
                boolean pool.default true
                int     pool.importance 1
                string  pool.comment
                pset    pset_default
        pool arenazone-pool
                int     pool.sys_id 2
                boolean pool.active true
                boolean pool.default false
                int     pool.importance 1
                string  pool.comment
                pset    arenazone-pset
        pset arenazone-pset
                int     pset.sys_id 1
                boolean pset.default false
                uint    pset.min 1
                uint    pset.max 1
                string  pset.units population
                uint    pset.load 0
                uint    pset.size 1
                string  pset.comment
                cpu
                        int     cpu.sys_id 0
                        string  cpu.comment
                        string  cpu.status on-line
        pset pset_default
                int     pset.sys_id -1
                boolean pset.default true
                uint    pset.min 1
                uint    pset.max 65536
                string  pset.units population
                uint    pset.load 38
                uint    pset.size 1
                string  pset.comment
                cpu
                        int     cpu.sys_id 1
                        string  cpu.comment
                        string  cpu.status on-line

Note:In the above output, you can see that one processor core has been removed from pool_default and assigned to arenazone-pool.
You can see the changes in /etc/pooladm.conf as well.

Assigning the processor pool to local zone:
Using zonecfg,we can associate an exiting pool to an existing zone using the set pool option.

Arenaglobal# zonecfg -z arenazone
zonecfg:arenazone> set pool=arenazone-pool
zonecfg:arenazone> verify
zonecfg:arenazone> exit
Arenaglobal#

By doing this zone will be restricted to use CPU cores which are assigned to that pool.


Thank you for reading this article.Please leave a comment if you have any doubt ,i will get back to you as soon as possible.