2 files changed, 41 insertions, 0 deletions

diff --git a/src/include/common.h b/src/include/common.h
index 4c517e427..80f55803d 100644
--- a/src/include/common.h
+++ b/src/include/common.h
@@ -124,6 +124,8 @@ static inline unsigned long long getticks(void) {
 #endif
 }
 
+void timetrace_start(void);
+float timetrace_end(void);
 int join_namespace(pid_t pid, char *type);
 int name2pid(const char *name, pid_t *pid);
 char *pid_proc_comm(const pid_t pid);
diff --git a/src/lib/common.c b/src/lib/common.c
index b44563733..3d7fc5ffa 100644
--- a/src/lib/common.c
+++ b/src/lib/common.c
@@ -282,3 +282,42 @@ int pid_hidepid(void) {
         fclose(fp);
         return 0;
 }
+
+//**************************
+// time trace based on getticks function
+//**************************
+static int tt_not_implemented = 0; // not implemented for the current architecture
+static unsigned long long tt_1ms = 0;
+static unsigned long long tt = 0;       // start time
+
+void timetrace_start(void) {
+        if (tt_not_implemented)
+                return;
+        unsigned long long t1 = getticks();
+        if (t1 == 0) {
+                tt_not_implemented = 1;
+                return;
+        }
+
+        if (tt_1ms == 0) {
+                usleep(1000);   // sleep 1 ms
+                unsigned long long t2 = getticks();
+                tt_1ms = t2 - t1;
+                if (tt_1ms == 0) {
+                        tt_not_implemented = 1;
+                        return;
+                }
+        }
+
+        tt = getticks();
+}
+
+float timetrace_end(void) {
+        if (tt_not_implemented)
+                return 0;
+
+        unsigned long long delta = getticks() - tt;
+        assert(tt_1ms);
+
+        return (float) delta / (float) tt_1ms;
+}