[PATCH] usertools: enhance CPU layout

[Stephen Hemminger]

On Tue, 18 Apr 2023 13:25:41 +0800
Wenzhuo Lu <wenzhuo.lu at intel.com> wrote:

> The cores in a single CPU may be not all
> the same.
> The user tool is updated to show the
> difference of the cores.
> 
> This patch addes below informantion,
> 1, Group the cores based on the die.
> 2, A core is either a performance core or an
>    efficency core.
>    A performance core is shown as 'Core-P'.
>    An efficency core is shown as 'Core-E'.
> 3, All the E-cores which share the same L2-cache
>    are grouped to one module.
> 
> The known limitation.
> 1, To tell a core is P-core or E-core is based on if
>    this core shares L2 cache with others.
> 
> Signed-off-by: Wenzhuo Lu <wenzhuo.lu at intel.com>

Side note:
This tool only exists because of lack of simple tool at the time.
Looking around, found that there is a tool 'lstopo' under the hwloc
package that gives output in many formats including graphical and
seems to do a better job than the DPDK python script.

Not sure how much farther DPDK should go in this area?
Really should be a distro tool.