On Fri, Oct 28, 2016 at 12:10:39AM -0700, Vikram Mulukutla wrote: > > We propose Window-Assisted Load Tracking (WALT) as an alternative or > additional > load tracking scheme in lieu of or along with PELT, one that in our estimation > better tracks task demand and CPU utilization especially for use cases on > mobile devices. WALT was conceived by Srivatsa Vaddagiri to provide better > perf-per-watt numbers on asymmetric CPU (frequency and/or IPC) > implementations, > (specifically on Qualcomm Snapgdragon chipsets running Android) and its > metrics > have been used to guide task placement and p-state selection (load balancing > in CFS still uses PELT statistics). WALT is now present in the android-common > kernel as well.
And how come we only learn of it after its already shipping? Isn't that arse backwards?