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SubjectRe: [PATCH v2 8/8] sched/pelt: Introduce PELT multiplier
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Hello Qais Yousef,

Thank you for your response.

On 1/21/2024 5:34 AM, Qais Yousef wrote:
> Hi Ashay
>
> On 01/20/24 13:22, Ashay Jaiswal wrote:
>> Hello Qais Yousef,
>>
>> We ran few benchmarks with PELT multiplier patch on a Snapdragon 8Gen2
>> based internal Android device and we are observing significant
>> improvements with PELT8 configuration compared to PELT32.
>>
>> Following are some of the benchmark results with PELT32 and PELT8
>> configuration:
>>
>> +-----------------+---------------+----------------+----------------+
>> | Test case | PELT32 | PELT8 |
>> +-----------------+---------------+----------------+----------------+
>> | | Overall | 711543 | 971275 |
>> | +---------------+----------------+----------------+
>> | | CPU | 193704 | 224378 |
>> | +---------------+----------------+----------------+
>> |ANTUTU V9.3.9 | GPU | 284650 | 424774 |
>> | +---------------+----------------+----------------+
>> | | MEM | 125207 | 160548 |
>> | +---------------+----------------+----------------+
>> | | UX | 107982 | 161575 |
>> +-----------------+---------------+----------------+----------------+
>> | | Single core | 1170 | 1268 |
>> |GeekBench V5.4.4 +---------------+----------------+----------------+
>> | | Multi core | 2530 | 3797 |
>> +-----------------+---------------+----------------+----------------+
>> | | Twitter | >50 Janks | 0 |
>> | SCROLL +---------------+----------------+----------------+
>> | | Contacts | >30 Janks | 0 |
>> +-----------------+---------------+----------------+----------------+
>>
>> Please let us know if you need any support with running any further
>> workloads for PELT32/PELT8 experiments, we can help with running the
>> experiments.
>
> Thanks a lot for the test results. Was this tried with this patch alone or
> the whole series applied?
>
I have only applied patch8(sched/pelt: Introduce PELT multiplier) for the tests.

> Have you tried to tweak each policy response_time_ms introduced in patch
> 7 instead? With the series applied, boot with PELT8, record the response time
> values for each policy, then boot back again to PELT32 and use those values.
> Does this produce similar results?
>
As the device is based on 5.15 kernel, I will try to pull all the 8 patches
along with the dependency patches on 5.15 and try out the experiments as
suggested.

> You didn't share power numbers which I assume the perf gains are more important
> than the power cost for you.
>
If possible I will try to collect the power number for future test and share the
details.

>
> Thanks!
>
> --
> Qais Yousef

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