[riot-notifications] [RIOT-OS/RIOT] sys/sched_rr: Add a round robin scheduler module (#16126)

Marian Buschsieweke notifications at github.com
Fri Apr 9 08:38:22 CEST 2021

@maribu commented on this pull request.

> @@ -82,7 +82,7 @@ void sched_runq_callback(uint8_t prio)
     if (_current_rr_priority == prio) {
-        if (sched_runqueue_len2(prio) == 0) {
+        if (sched_runqueue_is_empty(prio)) {

I'm pretty sure it did. I wouldn't need to consult the API doc for `sched_runqueue_is_empty()`, but I most certainly need to look up what `sched_runqueue_len2()` is.

If it would be `sched_runqueue_len(prio) == 0`, it would be equally readable. But that would come with a performance penalty.

Btw.: Have you checked the impact on ROM size? I have the feeling that not every compiler is able to optimize `sched_runqueue_len2(prio) == 0` down to the same code `sched_runqueue_is_empty(prio)` generates. If that is true, this might be a point that can convince you of using `sched_runqueue_is_empty()` here.

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