anchao commented on code in PR #15044:
URL: https://github.com/apache/nuttx/pull/15044#discussion_r1877662778
##########
drivers/timers/arch_alarm.c:
##########
@@ -46,6 +46,7 @@ static FAR struct oneshot_lowerhalf_s *g_oneshot_lower;
#ifndef CONFIG_SCHED_TICKLESS
static clock_t g_current_tick;
+static clock_t g_base_tick;
Review Comment:
which very easy to reproduce, you could resolve this issue in sim/nsh.
Please make the following changes to make host time always return to rtc time:
```
diff --git a/arch/sim/src/sim/posix/sim_hosttime.c
b/arch/sim/src/sim/posix/sim_hosttime.c
index 31608d2f92..7ed992b2d3 100644
--- a/arch/sim/src/sim/posix/sim_hosttime.c
+++ b/arch/sim/src/sim/posix/sim_hosttime.c
@@ -48,6 +48,8 @@ uint64_t host_gettime(bool rtc)
struct timespec tp;
uint64_t current;
+ rtc = true;
+
clock_gettime(rtc ? CLOCK_REALTIME : CLOCK_MONOTONIC, &tp);
current = 1000000000ull * tp.tv_sec + tp.tv_nsec;
```
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