On Tue, Sep 26, 2017 at 05:41:05PM +0100, Dietmar Eggemann wrote: > For a more accurate (i.e. frequency- and cpu-invariant) accounting > the task scheduler needs a frequency-scaling and on a heterogeneous > system a cpu-scaling correction factor. > > This patch-set implements a Frequency Invariance Engine (FIE) > based on the ratio of current frequency and maximum supported frequency > (topology_get_freq_scale()) in the arch topology driver (arm, arm64) to > provide such a frequency-scaling correction factor. > This is a solution to get frequency-invariant accounting support for > platforms without hardware-based performance tracking. > > The Cpu Invariance Engine (CIE) (topology_get_cpu_scale()) providing a > cpu-scaling correction factor was already introduced by the "Fix issues > and factorize arm/arm64 capacity information code" patch-set [1] which > went into v4.13. > > This patch-set also enables the frequency- and cpu-invariant accounting > support. Enabling here means to associate (wire) the task scheduler > function name arch_scale_freq_capacity and arch_scale_cpu_capacity with > the FIE and CIE function names from drivers/base/arch_topology.c. This > replaces the scheduler's default FIE and CIE in kernel/sched/sched.h. > > v4: review results: > > There were no further comments during the v4 [2] review.
This patchset crosses a bunch of different subsystems, who do you want/expect to be taking this through their tree? thanks, greg k-h
