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解决 base_time 和 counter_last 采样不同步产生固定偏差

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rcitach
2026-04-21 10:11:50 +00:00
committed by Bernard Xiong
parent c92480894c
commit 3b5d4342c0
1 changed files with 14 additions and 3 deletions
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17
components/lwp/arch/common/vdso_kernel.c
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@@ -90,6 +90,16 @@ static void rt_vdso_normalize_timespec(struct timespec *ts)
}
}
static void rt_vdso_counter_to_timespec(rt_uint64_t counter_value,
struct timespec *ts)
{
rt_uint64_t monotonic_ns;
monotonic_ns = rt_clock_time_counter_to_ns(counter_value);
ts->tv_sec = monotonic_ns / RT_VDSO_NSEC_PER_SEC;
ts->tv_nsec = monotonic_ns % RT_VDSO_NSEC_PER_SEC;
}
static struct timespec rt_vdso_add_timespec(const struct timespec *lhs,
const struct timespec *rhs)
{
@@ -106,13 +116,14 @@ static int rt_vdso_read_monotonic_snapshot(struct timespec *monotonic_time,
rt_uint64_t *counter_value,
rt_uint64_t *counter_freq)
{
if (rt_clock_boottime_get_ns(monotonic_time) != RT_EOK)
*counter_value = rt_clock_time_get_counter();
*counter_freq = rt_clock_time_get_freq();
if (*counter_freq == 0)
{
return -RT_ERROR;
}
*counter_value = rt_clock_time_get_counter();
*counter_freq = rt_clock_time_get_freq();
rt_vdso_counter_to_timespec(*counter_value, monotonic_time);
return RT_EOK;
}