Re: Cache Allocation Technology Design

Peter Zijlstra
2014-11-04T13:17:25Z

On Thu, Oct 30, 2014 at 04:18:33PM -0700, Vikas Shivappa wrote:
> One way to it is to merge the CAT cgroups into the cpuset . In essense there
> is no CAT cgroup seperately and we just have a new file 'cbm' in the cpuset.
> This would be visible only when system has Cache allocation support and the
> user can manipulate the cache bit mask here.
> The user can use the already existing cpu_exclusive file in the cpuset to
> mark the cgroups to use exclusive CPUs.
> That way we simplify and reuse cpuset code/hierarchy .. ?

I don't like extending cpusets further. Its already a weird and too big
controller.

What is wrong with having a specific CQM controller and using it
together with cpusets where desired?