In certain usecases there are extensive runnables on
silver cpus while there is ample opportunity to perform newidle
balance to partially halted cpus to relieve the load on silvers.
Currently, the check_for_higher_capacity() indicates that the
partially halted cpus are to be considered higher cap than min-cap
cpus.
Change this such that the capacities of the cpus are seen
as being the same during comparison, regardless of any small offset
in capacity between the two. This should mean that load balance
should happen more readily between the two, since this is a similar
cap operation.
Also in walt_lb_find_busiest_similar_cap_cpu() there was a change
introduced to prevent partially halted cpus from pulling tasks from
its unhalted sibling. This was done for cleanliness. Since the
partially halted cpu typically runs at the same or higher
frequency as its sibling, there is no need to prevent it from helping
an unhalted sibling. This is no longer correct when the cpus are exactly
the same capcity.
Update walt_lb_find_busiest_similar_cap_cpu() to delete
this condition such that a busiest cpu can be found when considering
a partially halted cpu as a destination or source cpu.
Change-Id: I6bc840d707752fa641e9616b42c8d28775d74a88
Signed-off-by: Stephen Dickey <quic_dickey@quicinc.com>
c017cdda8a