On Wed, May 26, 2021 at 9:24 AM Jan Beulich <jbeul...@suse.com> wrote: > > On 03.05.2021 21:27, Jason Andryuk wrote: > > acpi-cpufreq scales the aperf/mperf measurements by max_freq, but HWP > > needs to scale by base frequency. Settings max_freq to base_freq > > "works" but the code is not obvious, and returning values to userspace > > is tricky. Add an additonal perf_freq member which is used for scaling > > aperf/mperf measurements. > > > > Signed-off-by: Jason Andryuk <jandr...@gmail.com> > > --- > > I don't like this, but it seems the best way to re-use the common > > aperf/mperf code. The other option would be to add wrappers that then > > do the acpi vs. hwp scaling. > > Not sure I understand what you mean by "wrappers". I would assume that > for hwp you simply install a different getavg hook? Or else I guess > I'd need to see at least an outline of what you see as the alternative.
Something like a common get_measured_perf() returning just the aperf/mperf ratio with cpufreq_driver specific getavg() scaling as appropriate. Regards, Jason
