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Dear yuanle, Thank you for the information. You might be right. But I am still confused about what’s the difference between a vCPU and a physical core. Regards, Cheng From: sylecn [mailto:sylecn@xxxxxxxxx]
Hi, If setting vcpu# is not effective for LXC container, you may need to use cgroups.
Yuanle On Mon, Mar 17, 2014 at 2:32 PM, WANG Cheng D <Cheng.d.Wang@xxxxxxxxxxxxxxxxxxxx> wrote: Dear all, I am not clear about the ‘vcpu’ element for CPU allocation. I allocated 1 vCPU to my container, after I started the container, I ran 4 computation-intensive tasks
on the container. And I found all the 4 physical core are 100% used (my host has 4 physical cores and no other application ran on the host except the container). That is, all available cores were used by the container. I want to know how to give a hard limitation
for CPU usage of a container. So I don’t understand what ‘vcpu’ setting can be used for. I know that another CPU allocation element ‘shares’ can also be used, but this elements only give a relative quota. If new containers are started, the CPU quota
for the already started containers will change. Regards, Cheng
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