Re: [Xen-devel] [PATCH v3 0/7] enable Cache QoS Monitoring (CQM) feature

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Fri, 2013-11-29 at 15:36 +0000, Jan Beulich wrote:
> >>> On 29.11.13 at 16:29, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:
> > On Fri, 2013-11-29 at 13:48 +0800, dongxiao.xu@xxxxxxxxx wrote:
> >> From: Dongxiao Xu <dongxiao.xu@xxxxxxxxx>
> >> 
> >> Changes from v2:
> >>  - Address comments from Andrew Cooper, including:
> >>    * Merging tools stack changes into one patch.
> >>    * Reduce the IPI number to one per socket.
> >>    * Change structures for CQM data exchange between tools and Xen.
> >>    * Misc of format/variable/function name changes.
> >>  - Address comments from Konrad Rzeszutek Wilk, including:
> >>    * Simplify the error printing logic.
> >>    * Add xsm check for the new added hypercalls.
> >> 
> >> Changes from v1:
> >>  - Address comments from Andrew Cooper, including:
> >>    * Change function names, e.g., alloc_cqm_rmid(), system_supports_cqm(), 
> > etc.
> >>    * Change some structure element order to save packing cost.
> >>    * Correct some function's return value.
> >>    * Some programming styles change.
> >>    * ...
> >> 
> >> Future generations of Intel Xeon processor may offer monitoring capability 
> > in
> >> each logical processor to measure specific quality-of-service metric,
> >> for example, the Cache QoS Monitoring to get L3 cache occupancy.
> >> Detailed information please refer to Intel SDM chapter 17.14.
> > 
> > Is this being proposed for 4.4? I think it is rather late to be adding
> > such stuff.
> 
> I think we already settled on not taking it, and Intel indicated
> that they're fine with that decision.

OK, in which case the tools side of this is unlikely to make it to the
top of my todo list until we are closer to the 4.5 development phase
opening up.

Ian.


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel