Messages in this thread | | | From | Mahmood Naderan <> | Date | Tue, 22 Mar 2016 13:09:42 +0430 | Subject | CPU usage limitation (number of cores) |
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Hi, There is a question about CPU usage limitation and I found no place for my question other than here.
There are 32 cores in a system (2 cpus each 16 cores) and I want to limit a user to use only 4 cores (100% usage for that 4 cores). There are two kernel parameter for that according to the manuals: cpu.cfs_quota_us and cpu.cfs_period_us
An example on the kernel.org documents says:
With 500ms period and 1000ms quota, the group can get 2 CPUs worth of runtime every 500ms. # echo 1000000 > cpu.cfs_quota_us /* quota = 1000ms */ # echo 500000 > cpu.cfs_period_us /* period = 500ms */
I want to know how those ms are determined? In my case, I think the quota is 32000000 and the period is 4000000. Am I right? But it doesn't work! and I get an error when I want to start cgroup service
Failed to parse /etc/cgconfig.conf or /etc/cgconfig.d [FAILED]Starting cgconfig service: /sbin/cgconfigparser; error loading /etc/cgconfig.conf: Failed to remove a non-empty group
Reference: https://www.kernel.org/doc/Documentation/scheduler/sched-bwc.txt
Regards, Mahmood
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