Re: [Xen-devel] [RFC Design Doc] Intel L2 Cache Allocation Technology (L2 CAT) Feature enabling

2016-05-16 Thread Dario Faggioli
On Mon, 2016-05-16 at 16:23 +0800, He Chen wrote: > As Andrew said, CLOS is currently managed per-domain in Xen and it > works > well so far. So in initial design, I am inclined to continue this > behavior (per-socket) to L2 CAT to keep the consistency between L2 > and > L3 CAT. Any thoughts? >

Re: [Xen-devel] [RFC Design Doc] Intel L2 Cache Allocation Technology (L2 CAT) Feature enabling

2016-05-16 Thread He Chen
On Fri, May 13, 2016 at 06:17:53PM +0200, Dario Faggioli wrote: > On Fri, 2016-05-13 at 10:23 +0100, Andrew Cooper wrote: > > On 13/05/16 09:55, Jan Beulich wrote: > > >  > > > But anyway, L2 or L3 - I can't see how this context switching would > > > DTRT when there are vCPU-s of different domains

Re: [Xen-devel] [RFC Design Doc] Intel L2 Cache Allocation Technology (L2 CAT) Feature enabling

2016-05-13 Thread Dario Faggioli
On Fri, 2016-05-13 at 10:23 +0100, Andrew Cooper wrote: > On 13/05/16 09:55, Jan Beulich wrote: > >  > > But anyway, L2 or L3 - I can't see how this context switching would > > DTRT when there are vCPU-s of different domains on the same > > socket (or core, if L2s and MSRs were per-core): The one

Re: [Xen-devel] [RFC Design Doc] Intel L2 Cache Allocation Technology (L2 CAT) Feature enabling

2016-05-13 Thread Andrew Cooper
On 13/05/16 09:55, Jan Beulich wrote: On 13.05.16 at 09:43, wrote: >> On 13/05/2016 07:48, Jan Beulich wrote: >> On 13.05.16 at 08:26, wrote: On Thu, May 12, 2016 at 04:05:36AM -0600, Jan Beulich wrote: On 12.05.16 at

Re: [Xen-devel] [RFC Design Doc] Intel L2 Cache Allocation Technology (L2 CAT) Feature enabling

2016-05-13 Thread Jan Beulich
>>> On 13.05.16 at 09:43, wrote: > On 13/05/2016 07:48, Jan Beulich wrote: > On 13.05.16 at 08:26, wrote: >>> On Thu, May 12, 2016 at 04:05:36AM -0600, Jan Beulich wrote: >>> On 12.05.16 at 11:40, wrote: >

Re: [Xen-devel] [RFC Design Doc] Intel L2 Cache Allocation Technology (L2 CAT) Feature enabling

2016-05-13 Thread Andrew Cooper
On 13/05/2016 07:48, Jan Beulich wrote: On 13.05.16 at 08:26, wrote: >> On Thu, May 12, 2016 at 04:05:36AM -0600, Jan Beulich wrote: >> On 12.05.16 at 11:40, wrote: We plan to bring new PQoS feature called Intel L2 Cache Allocation

Re: [Xen-devel] [RFC Design Doc] Intel L2 Cache Allocation Technology (L2 CAT) Feature enabling

2016-05-13 Thread Jan Beulich
>>> On 13.05.16 at 08:26, wrote: > On Thu, May 12, 2016 at 04:05:36AM -0600, Jan Beulich wrote: >> >>> On 12.05.16 at 11:40, wrote: >> > We plan to bring new PQoS feature called Intel L2 Cache Allocation >> > Technology (L2 CAT) to Xen. >> > >>

Re: [Xen-devel] [RFC Design Doc] Intel L2 Cache Allocation Technology (L2 CAT) Feature enabling

2016-05-13 Thread He Chen
On Thu, May 12, 2016 at 04:05:36AM -0600, Jan Beulich wrote: > >>> On 12.05.16 at 11:40, wrote: > > % Intel L2 Cache Allocation Technology (L2 CAT) Feature > > % Revision 1.0 > > > > \clearpage > > > > Hi all, > > > > We plan to bring new PQoS feature called Intel L2

Re: [Xen-devel] [RFC Design Doc] Intel L2 Cache Allocation Technology (L2 CAT) Feature enabling

2016-05-12 Thread Andrew Cooper
On 12/05/16 10:40, He Chen wrote: > % Intel L2 Cache Allocation Technology (L2 CAT) Feature > % Revision 1.0 > > \clearpage > > Hi all, > > We plan to bring new PQoS feature called Intel L2 Cache Allocation > Technology (L2 CAT) to Xen. > > L2 CAT is supported on Atom codename Goldmont and beyond.

Re: [Xen-devel] [RFC Design Doc] Intel L2 Cache Allocation Technology (L2 CAT) Feature enabling

2016-05-12 Thread Jan Beulich
>>> On 12.05.16 at 11:40, wrote: > % Intel L2 Cache Allocation Technology (L2 CAT) Feature > % Revision 1.0 > > \clearpage > > Hi all, > > We plan to bring new PQoS feature called Intel L2 Cache Allocation > Technology (L2 CAT) to Xen. > > L2 CAT is supported on Atom

[Xen-devel] [RFC Design Doc] Intel L2 Cache Allocation Technology (L2 CAT) Feature enabling

2016-05-12 Thread He Chen
% Intel L2 Cache Allocation Technology (L2 CAT) Feature % Revision 1.0 \clearpage Hi all, We plan to bring new PQoS feature called Intel L2 Cache Allocation Technology (L2 CAT) to Xen. L2 CAT is supported on Atom codename Goldmont and beyond. “Big-core” Xeon does not support L2 CAT in current

[Xen-devel] [RFC Design Doc] Intel L2 Cache Allocation Technology (L2 CAT) Feature enabling

2016-05-12 Thread He Chen
% Intel L2 Cache Allocation Technology (L2 CAT) Feature % Revision 1.0 \clearpage Hi all, We plan to bring new PQoS feature called Intel L2 Cache Allocation Technology (L2 CAT) to Xen. L2 CAT is supported on Atom codename Goldmont and beyond. “Big-core” Xeon does not support L2 CAT in current