On 07/20/2016 03:10 PM, Al Stone wrote: > When CPPC is being used by ACPI on arm64, user space tools such as > cpupower report CPU frequency values from sysfs that are incorrect. > > What the driver was doing was reporting the values given by ACPI tables > in whatever scale was used to provide them. However, the ACPI spec > defines the CPPC values as unitless abstract numbers. Internal kernel > structures such as struct perf_cap, in contrast, expect these values > to be in KHz. When these struct values get reported via sysfs, the > user space tools also assume they are in KHz, causing them to report > incorrect values (for example, reporting a CPU frequency of 1MHz when > it should be 1.8GHz). > [snip...]
Ping? If anyone has sent comments, I have not received them. Thanks in advance for the time and effort. I know merge window can be a very busy time. -- ciao, al ----------------------------------- Al Stone Software Engineer Red Hat, Inc. a...@redhat.com -----------------------------------
