Re: [Xen-devel] [PATCH v5 12/13] tools: add tools support for Intel CAT

[Dario Faggioli <dario.faggioli@xxxxxxxxxx>]

On Tue, 2015-04-21 at 15:01 +0100, Ian Campbell wrote:
> On Tue, 2015-04-21 at 17:49 +0800, Chao Peng wrote:

> > I do like this suggestion and I have ever considered it actually. The
> > only thing prevents me is that we need an extra _get_socket_count in xl
> > for TARGET_ALL case. So libxl__count_physical_sockets is needed to be
> > public. If Ian/Wei have no concerns for this, then I'm glad to do this.
> 
> I don't think you need libxl__count_physical_sockets for this,
>
I also don't think that is necessary.

>  the
> existing xl code for similar things just uses libxl_bitmap_set_any to
> handle the all case.
> 
That or, if you want to do something similar to what we have in *libxl*
now you can look at the implementation of libxl_cpu_bitmap_alloc() (or
libxl_node_bitmap_alloc() ) and define yours
libxl_socket_bitmap_alloc().

In there, libxl_get_max_cpus() ( *_nodes()) is used, internally, to
determine the size of the bitmap, if the user did not provide it
explicitly. In your case, you can use libxl__count_physical_sockets() to
the same effect, without the need for it to be public.

But then again, that is probably even not necessary.

Regards,
Dario

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