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sched/spinlock: Update the information of critmon in docu.

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Since the busy-wait time statistics for entering the critical section have been added, the critmon information in the document has been updated accordingly.

Signed-off-by: wangzhi16 <wangzhi16@xiaomi.com>
This commit is contained in:
wangzhi16
2026-01-26 15:10:58 +08:00
committed by Donny(董九柱)
parent 30493d558a
commit 3b11545356
3 changed files with 16 additions and 7 deletions
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fs/procfs/fs_procfscritmon.c
+7 -7
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@@ -191,7 +191,7 @@ static ssize_t critmon_read_cpu(FAR struct critmon_file_s *attr,
size_t copysize;
size_t totalsize;
#if CONFIG_SCHED_CRITMONITOR_MAXTIME_BUSYWAIT >= 0
struct timespec alltime;
struct timespec all_time;
clock_t elapsed;
uint32_t rate;
#endif
@@ -321,24 +321,24 @@ static ssize_t critmon_read_cpu(FAR struct critmon_file_s *attr,
if (g_busywait_total[cpu] > 0)
{
perf_convert(g_busywait_total[cpu], &alltime);
perf_convert(g_busywait_total[cpu], &all_time);
}
else
{
alltime.tv_sec = 0;
alltime.tv_nsec = 0;
all_time.tv_sec = 0;
all_time.tv_nsec = 0;
}
elapsed = clock() * CONFIG_USEC_PER_TICK;
rate = (uint64_t)(alltime.tv_sec * 1000000 + alltime.tv_nsec / 1000) *
rate = (uint64_t)(all_time.tv_sec * 1000000 + all_time.tv_nsec / 1000) *
1000000 / elapsed;
/* Generate output for all busywait time to enter csection(get spinlock) */
linesize = procfs_snprintf(attr->line, CRITMON_LINELEN, ",%lu.%09lu %2"
PRId32 ".%04" PRId32 "%%",
(unsigned long)alltime.tv_sec,
(unsigned long)alltime.tv_nsec,
(unsigned long)all_time.tv_sec,
(unsigned long)all_time.tv_nsec,
rate / 10000, rate % 10000);
copysize = procfs_memcpy(attr->line, linesize, buffer, buflen, offset);