On Sun, 2021-03-21 at 14:48 -0400, Rik van Riel wrote:
>
> + if (cpus_share_cache(prev, target)) {
> + /* No idle core. Check if prev has an idle sibling. */
> + i = select_idle_smt(p, sd, prev);
Uh, one minute. This is the wrong version of the patch.
There's
Mel Gorman did some nice work in 9fe1f127b913
("sched/fair: Merge select_idle_core/cpu()"), resulting in the kernel
being more efficient at finding an idle CPU, and in tasks spending less
time waiting to be run, both according to the schedstats run_delay
numbers, and according
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