Linux – Is It Possible to set cpu affinity for particular user

central-processing-unitlinuxredhat

I mean is their any way we can set up cpu affinity for particular user, for all his currently running process or for process which he will start later?

Best Answer

Yes, this is possible.

I would execute the user's processes into a cgroup comprised of the CPU core(s) you wish to use. Depending on your version of RHEL (5 versus 6), you could use CPU shields via cpusets/cset in EL5 or try the cgroup approach documented in EL6. The latter example uses an /etc/cgrules.conf file which defines rules for cgroup resources (e.g. all of the processes belonging to Jerome will run in a specified cgroup). The former allows you to execute processes directly into a CPU shield.

For your example using cset, I would simply execute a bash shell for the user into the right CPU shield. All of their child proceses will be contained within. See here.

Related Solutions

Linux – Can I Nohup/Screen an Already-Started Process?

If you're using Bash, you can run disown -h job

disown
disown [-ar] [-h] [jobspec ...]
Without options, each jobspec is removed from the table of active jobs. If the -h option is given, the job is not removed from the table, but is marked so that SIGHUP is not sent to the job if the shell receives a SIGHUP. If jobspec is not present, and neither the -a nor -r option is supplied, the current job is used. If no jobspec is supplied, the -a option means to remove or mark all jobs; the -r option without a jobspec argument restricts operation to running jobs.

Linux, set affinity for init

Try the "isolcpus" kernel boot arg. You can list the CPUs you want the scheduler to ignore; the CPUs not listed will effectively form a mask for init and all its children. You can then place a process on the ignored CPUs by running it via taskset.

Best Answer

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Linux, set affinity for init

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