| |
|
 |
|
 |
|
|
|
| |
|
|
xen-devel
Re: [Xen-devel] vCPU pinning
> I would like to "pin" vcpu to a domain,
> Can someone please point to me if there's such a support?
Your question didn't quite make sense, but I think I see what you mean - it's
just that the terminology is a bit complicated!
If you consider a domain as being "like a process" then VCPUs are
like "threads". They're the parts of the domain that get scheduled on the
real CPUs and do work. *within* the domain, these will be shared out between
processes the OS is running but /Xen doesn't really know about this/. It
just sees a bunch of VCPUs from a domain that it can run, and a bunch of real
logical CPUs that it can run them on.
You can pin a VCPU to a real logical CPU (that's a core or a hyperthread on
the host machine). This can be used to divide up the machine more strictly,
enforce separation or quality of service, etc.
You can specify pinning at runtime using the command "xm vcpu-pin", or in the
domain config file using the "CPUs" variable. I believe it's possible to set
a mask of "possible CPUs" for all VCPUs or for individual VCPUs.
Hope this helps you.
Cheers,
Mark
PS. "how do I...?" questions are generally better directed to the xen-users
mailing list - they're liable to get more responses and discussion there due
to the higher subscriber cound and user focus.
--
Dave: Just a question. What use is a unicyle with no seat? And no pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel
|
|
|
| |
|
Home