Docker CPU share metrics

telegraf
#1

Is there any metric in either mesos input or docker input that gives the cpushares allocated to the container? The output of docker inspect gives below (part of the output)
"CpuShares": 409,
I am trying to get the total CPUs allocated in a mesos-slave node. mesos_slave_cpus_used does not give the correct value and looks like it give the current usage and not the allocated value.
I tried the docker input cpu metrics but was not able to find the shares allocated. any suggestions?