On 7/8/19 10:24 AM, Parth Shah wrote:
When searching for an idle_sibling, scheduler first iterates to search for an idle core and then for an idle CPU. By maintaining the idle CPU mask while iterating through idle cores, we can mark non-idle CPUs for which idle CPU search would not have to iterate through again. This is especially true in a moderately load system Optimize idle CPUs search by marking already found non idle CPUs during idle core search. This reduces iteration count when searching for idle CPUs, resulting in lower iteration count.
I believe this can co-exist with latency-nice? We can derive the 'nr' in select_idle_cpu from latency-nice and use the new mask to iterate.
