eas-dev January 2018

eas-dev@lists.linaro.org

17 participants
12 discussions

Re: [Eas-dev] [ARM-software/lisa] What is the best way to evaluate EAS versus non-EAS on Linux? (#537)

by Patrick Bellasi

[ +eas_dev ] Hi Leonard, first of all I would like to inform you that, for EAS specific question, you should better post your requests on the eas-dev ML: https://lists.linaro.org/mailman/listinfo/eas-dev This is where you can reach most of the people working on EAS. Hereafter are some comments related to your question. On 05-Jan 06:41, Leonard Crestez wrote: > After porting the EAS patches and I'd like to do a top-level > comparison between EAS and non-EAS. Looking through lisa notebooks I > didn't find anything that obviously fits; many of the tests refuse > to even run without EAS. Most of the tests we have on LISA_HOME/tests/eas are actually to test that EAS is working as expected. > If there is no good top-level synthetic evaluation for linux maybe I > could use one for Android? > > I'm looking for something that can say something like "EAS consumes > x% less power". We actually have a workflow to run a complete set of Android workloads on a custom target and compare power/performance results corresponding to different kernels. That suite is named wltest and it's part of LISA. Here are the instructions to run wltest: https://github.com/ARM-software/lisa/tree/master/tools/wltests lemme know if you have any question/doubts about running that suite of tests. Do please consider that the Google kernel team has a great interest on checking wltests results to assess proposed scheduler changes for the AOSP common kernel. Here is an example of the report generated by wltest when comparing WALT vs PELT kernels: https://gist.github.com/derkling/3a8c3568676a29e608d6dcb15af06241 As a final remark, please do notice that wltest currently supports out-of-the-box only hikey960 boards with an ACME energy meter. However, it's relatively easy to integrate the support for different targets and energy meters. Unfortunately we do not have documentation available, but... everything needed should be just what you find under one of platform folders: https://github.com/ARM-software/lisa/tree/master/tools/wltests/platforms You can just copy the content of: https://github.com/ARM-software/lisa/tree/master/tools/wltests/platforms/hi… and modify the contained files to match your specific target. Internally we have an integration for Google Pixel 2 devices... but still did not find time to push/merge it. Lemme know if you are interested ;-) Cheers Patrick -- #include <best/regards.h> Patrick Bellasi

6 years, 4 months

[Integration Branch] Update 05-Jan-2018

by Michele DiGiorgio

Hi, a new EAS integration branch (tag: 20180105_1000) is available on: http://linux-arm.org/git?p=linux-power.git News: Energy model data is now stored in dt rather than in arch/*/topology.c. Support for getting the energy model from dt into the scheduler has been added. This is to align energy model presentation with what is done in android.googlesource.com/kernel/common experimental/android-4.14. For further information about main features, test coverage and work items for next integration please have a look at: https://developer.arm.com/open-source/energy-aware-scheduling/eas-mainline-… Best Regards, Michele

6 years, 4 months

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eas-dev January 2018