On Monday, August 20, 2018 11:44:16 AM CEST Quentin Perret wrote: > Schedutil aggregates the PELT signals of CFS, RT, DL and IRQ in order > to decide which frequency to request. Energy Aware Scheduling (EAS) > needs to be able to predict those requests to assess the energy impact > of scheduling decisions. However, the PELT signals aggregation is only > done in schedutil for now, hence making it hard to synchronize it with > EAS. > > To address this issue, introduce schedutil_freq_util() to perform the > aforementioned aggregation and make it available to other parts of the > scheduler. Since frequency selection and energy estimation still need > to deal with RT and DL signals slightly differently, schedutil_freq_util() > is called with a different 'type' parameter in those two contexts, and > returns an aggregated utilization signal accordingly.
This is complementary to patch [02/14] IMO. schedutil_freq_util() and map_util_freq() introduced by that patch should always be used together as they are two parts of one algorithm in my view. Would it be possible to make that clearer? Thanks, Rafael
