Error in vCPUS computing #6
Description
Hi,
I built a container with the scripts and executed it on K8S.
I have an error on vCPU computing when running on IBM K8S cluster. I give 2 CPU to the Informix container.
The value of vCPU_CONTAINER returned by the container (in the script "calculate_onconfig.sh") is 40000.
informix@informixdb-0:/opt/ibm/config$ cat /sys/fs/cgroup/cpu/cpu.cfs_quota_us
40000
informix@informixdb-0:/opt/ibm/config$ cat /sys/fs/cgroup/cpu/cpu.cfs_period_us
20000
When I run the same command in a docker on my laptop (CentOS), I get the following values.
informix@informixdb-0:/opt/ibm/config$ cat /sys/fs/cgroup/cpu/cpu.cfs_quota_us
200000
informix@informixdb-0:/opt/ibm/config$ cat /sys/fs/cgroup/cpu/cpu.cfs_period_us
100000
I think the right formula to compute the number of vCPU allocated to the container is the following:
CPUFILE_QUOTA="/sys/fs/cgroup/cpu/cpu.cfs_quota_us"
CPUFILE_PERIOD="/sys/fs/cgroup/cpu/cpu.cfs_period_us"
vCPUS_CONTAINER_QUOTA=`cat $CPUFILE_QUOTA`
vCPUS_CONTAINER_PERIOD=`cat $CPUFILE_PERIOD`
###
### Set the amount of CPU's available to the docker container
###
if [[ $vCPUS_CONTAINER == "-1" ]]
then
vCPUS=$vCPUS_HOST
else
vCPUS=`echo "$vCPUS_CONTAINER_QUOTA / $vCPUS_CONTAINER_PERIOD" | bc`
fi
Could you please check?
Regards,
Renaud