[Bug 69821] setting CONFIG_HZ_PERIODIC locks cpu at the lowest frequency using ONDEMAND

[email protected] Tue, 15 Dec 2015 00:12:02 +0000

Newsgroups	org.kernel.vger.cpufreq
Message-ID	<[email protected]/>

https://bugzilla.kernel.org/show_bug.cgi?id=69821

--- Comment #4 from Chen Yu <[email protected]> ---
CONFIG_NO_HZ_FULL  is using ktime_get to get the idle time in
get_cpu_idle_time_us, it is based on clock source,  while if the kernel config
is set with CONFIG_HZ_PERIODIC , the governor might get idle time by
jiffies(tick, minimum unit of 4 millisecond),
the former is more accurate than the latter, this might be one of the reason
for the problem. I can try to reproduce and take a look.

-- 
You are receiving this mail because:
You are the assignee for the bug.