Re: [PATCH] perf vendor events: Add Arm Neoverse V2 PMU events

[James Clark]

On 21/10/2022 11:47, John Garry wrote:
> On 20/10/2022 14:45, James Clark wrote:
>> Rename the neoverse-n2 folder to make it clear that it includes V2, and
>> add V2 to mapfile.csv. V2 has the same events as N2, visible by running
>> the following command in the ARM-software/data github repo [1]:
>>
>>    diff pmu/neoverse-v2.json pmu/neoverse-n2.json | grep code
>>
>> Testing:
>>
>>    $ perf test pmu
>>
>>    10: PMU events                                           :
>>    10.1: PMU event table sanity                             : Ok
>>    10.2: PMU event map aliases                              : Ok
>>    10.3: Parsing of PMU event table metrics                 : Ok
>>    10.4: Parsing of PMU event table metrics with fake PMUs  : Ok
>>
>> [1]:https://github.com/ARM-software/data
>>
>> Signed-off-by: James Clark<james.clark@xxxxxxx>
>> ---
> 
> This looks ok. Out of curiosity, do you know how the naming works for
> these neoverse cores? Were "n" a predecessor to "v"?

Thanks for the review. No, they're more like different product lines
than predecessors. From the image on this article [1], N are focused on
performance per watt and V are high performance.

[1]:
https://www.arm.com/company/news/2022/09/redefining-the-global-computing-infrastructure-with-next-generation-arm-neoverse-platforms

> 
> thanks,
> John