On 23-06-21, 08:57, Qian Cai wrote: > Viresh, I am afraid I don't feel comfortable yet. I have a few new tests in > development, and will provide an update once ready. Oh sure, np. > Also, I noticed the delivered perf is even smaller than lowest_perf (100). > # cat /sys/devices/system/cpu/cpu8/acpi_cppc/feedback_ctrs > ref:103377547901 del:54540736873 > # cat /sys/devices/system/cpu/cpu8/acpi_cppc/feedback_ctrs > ref:103379170101 del:54541599117 > > 100 * (54541599117 - 54540736873) / (103379170101 - 103377547901) = 53 > > My understanding is that the delivered perf should fail into the range between > lowest_perf and highest_perf. Is that assumption correct? This happens on > 5.4-based kernel, so I am in process running your series on that system to see > if there is any differences. In any case, if it is a bug it is pre-existing, > but I'd like to understand a bit better in that front first. Vincent: Can that happen because of CPU idle ? -- viresh
