On 12/12/23 11:46, Dietmar Eggemann wrote:
On 08/12/2023 02:52, Qais Yousef wrote:
Due to the way code is structured, it makes a lot of sense to trigger
cpufreq_update_util() from update_load_avg(). But this is too aggressive
as in most cases we are iterating through entities in a loop to
update_load_avg() in the hierarchy. So we end up sending too many
request in an loop as we're updating the hierarchy.
But update_load_avg() calls cfs_rq_util_change() which only issues a
cpufreq_update_util() call for the root cfs_rq?
Yes I've noticed that and wondered. Maybe my analysis was flawed and I was just
hitting the issue of iowait boost request conflicting with update_load_avg()
request.
Let me have another look. I think we'll still end up needing to take the update
out of util_avg to be able to combine the two calls.