Re: [PATCH] usertools: enhance logic to display NUMA

[Ferruh Yigit <ferruh.yigit@amd.com>]

On 3/28/2022 3:56 AM, Varghese, Vipin wrote:
> Hi Thomas,
> 
> <snipp> 
> 
> 26/03/2022 08:32, Vipin Varghese:
>>> enhance python logic to accomadate NUMA information. Current logic 
>>> considers physical socket with CPU threads to core map. With new AMD 
>>> SKU vairant NUMA is no longer same as SOCKET. Single physical socket 
>>> can be partitioned to variant of 1,2 and 4.
>>>
>>> The changes address the new mapping with Socket-NUMA to CPU cores.
>>>
>>> Signed-off-by: Vipin Varghese <vipin.varghese@amd.com>
>>> ---
>>>  usertools/cpu_layout.py | 76 
>>> +++++++++++++++++++++++++----------------
>>>  1 file changed, 47 insertions(+), 29 deletions(-)
>> Honestly, I'm not sure it is a good idea to keep this script in the DPDK repo.
>> Can it be replaced with hwloc usage?
> 
> thanks for the suggestion, it is genuine and useful.   Following is my observations
> 
> - It takes some effort to identify the NUMA with `Group`
>  - One needs to install ` lstopo-no-graphics` on distro and manually build and add on custom Linux.
> 
> 
>> What is the output on the new AMD SKU for this command?
>>         lstopo-no-graphics --merge
> 
> I have tried ` lstopo-no-graphics --merge` on a ` 2 Socket AMD EPYC 7713 64-Core Processor` with
> possible NUMA configuration such as 1, 2 and 4. 
>

Hi Thomas,

Should we document preferred tool and usage in DPDK, if so where is good
location for it?

Also @Dmitry, is there solution for Windows for this issue (a tool to
replace cpu_layout.py)?

Thanks,
ferruh