anchao commented on code in PR #17065:
URL: https://github.com/apache/nuttx/pull/17065#discussion_r2385532094
##########
sched/sched/sched_timerexpiration.c:
##########
@@ -424,16 +427,22 @@ static clock_t nxsched_timer_start(clock_t ticks, clock_t
interval)
interval = interval <= (CONFIG_TIMER_ADJUST_USEC / USEC_PER_TICK) ? 0 :
interval - (CONFIG_TIMER_ADJUST_USEC / USEC_PER_TICK);
-#ifdef CONFIG_SCHED_TICKLESS_ALARM
+#ifdef CONFIG_HRTIMER
+ ret = hrtimer_start(&g_hrtimer_systick_timer,
+ NSEC_PER_TICK * (ticks + interval),
Review Comment:
Nuttx was originally designed as a tick-based framework with a simple and
efficient architecture, making it suitable for use on lower-frequency CPUs like
the Cortex-M. HRtimers are merely an alternative.
Also, we cannot switch all timer systems to HRtimers, as this would degrade
overall system performance. HRtimers are only suitable for high-frequency CPUs
with real-time requirements.
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