From: Laurent MAZET <laurent.mazet@thalesgroup.com>
Date: Mon, 3 Nov 2025 18:19:33 +0000 (+0100)
Subject: check clock resolution
X-Git-Tag: v1.1~10
X-Git-Url: https://secure.softndesign.org/git/?a=commitdiff_plain;h=7cc1836857f2ecbd09fa7a28b21cd25c4df897c7;p=benchmarks.git

check clock resolution
---

diff --git a/mtime.c b/mtime.c
index 67c6ee7..f1ca364 100644
--- a/mtime.c
+++ b/mtime.c
@@ -1,7 +1,20 @@
+#include <stdio.h>
 #include <time.h>
 
 #include "mtime.h"
 
+int res_timestamp (void)
+{
+    struct timespec ts;
+    int res = 0;
+    if (clock_getres (CLOCK_REALTIME, &ts) == -1) {
+        fprintf (stderr, "error: clock_getres\n");
+    } else {
+        res = ts.tv_nsec;
+    }
+    return res;
+}
+
 dts_t diff_timestamp  (ts_t *ts1, ts_t *ts2)
 {
     return  (dts_t)(ts1->tv_sec - ts2->tv_sec) * 1000000000 +
diff --git a/mtime.h b/mtime.h
index 369d046..69343b0 100644
--- a/mtime.h
+++ b/mtime.h
@@ -9,6 +9,8 @@ typedef struct timespec ts_t;
 
 typedef long int dts_t;
 
+int res_timestamp (void);
+
 #define sys_timestamp(ts) clock_gettime (CLOCK_REALTIME, (ts))
 
 dts_t diff_timestamp  (ts_t *ts1, ts_t *ts2);