Messages in this thread | | | Date | Tue, 6 Feb 2024 22:37:32 +0530 | Subject | Re: [PATCH v2 8/8] sched/pelt: Introduce PELT multiplier | From | Ashay Jaiswal <> |
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On 1/30/2024 10:58 PM, Vincent Guittot wrote: > On Sun, 28 Jan 2024 at 17:22, Ashay Jaiswal <quic_ashayj@quicinc.com> wrote: >> >> 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. > > Generally speaking, it would be better to compare with the latest > kernel or at least close and which includes new features added since > v5.15 (which is more than 2 years old now). I understand that this is > not always easy or doable but you could be surprised by the benefit of > some features like [0] merged since v5.15 > > [0] https://lore.kernel.org/lkml/249816c9-c2b5-8016-f9ce-dab7b7d384e4@arm.com/ > Thank you Vincent for the suggestion, I will try to get the results on device running with most recent kernel and update.
Thanks, Ashay Jaiswal >> >>> 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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