[PATCH 16/20] selftest/powerpc/pmu/: Add selftest for mmcr1 pmcxsel/unit/cache fields

[kajoljain]

On 3/10/22 17:41, Michael Ellerman wrote:
> Christophe Leroy <christophe.leroy at csgroup.eu> writes:
>> Le 27/01/2022 à 08:20, Kajol Jain a écrit :
>>> From: Athira Rajeev <atrajeev at linux.vnet.ibm.com>
>>>
>>> The testcase uses event code "0x1340000001c040" to verify
>>> the settings for different fields in Monitor Mode Control
>>> Register 1 (MMCR1). The fields include PMCxSEL, PMCXCOMB
>>> PMCxUNIT, cache. Checks if these fields are translated
>>> correctly via perf interface to MMCR1
>>>
>>> Signed-off-by: Athira Rajeev <atrajeev at linux.vnet.ibm.com>
>>
>> I see the series has been accepted but this patch has been left over.
>>
>> Any reason ?
> 
> Yeah it's flakey. It counts cache loads but the workload it runs doesn't
> necessarily cause any, so it sometimes fails. I've reported that
> privately to Kajol.
> 

Hi Christophe,
     As Michael mentioned, with the current workload we used in this
patch, the testcase was failing sometimes as required cache load not
happening everytime. We will send this patch separately with proper
workload in next version.

Thanks,
Kajol Jain

> cheers