Re: [RFC PATCH v1] pin_on_cpu: Introduce thread CPU pinning system call

[Mathieu Desnoyers]

(replying again as plain text for mailing lists)

----- On Jan 22, 2020, at 10:44 AM, Jan Ziak 0xe2.0x9a.0x9b@xxxxxxxxx wrote:

> Hello

> I would like to note that this does not help userspace to express dynamic
> scheduling relationships among processes/threads such as "do not run processes
> A and B on the same core" or "run processes A and B on cores sharing the same
> L2 cache".

Indeed, this is not what this system call is trying to solve. Does the name "pin_on_cpu" lead 
to confusion here ? 

I thought that cgroups was already the mechanism taking care of this kind of requirement. 

Thanks, 

Mathieu 

-- 
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com