Use a steady_clock for the stop watch.

2 files changed, 24 insertions, 12 deletions

diff --git a/fastos/src/vespa/fastos/timestamp.cpp b/fastos/src/vespa/fastos/timestamp.cpp
index bc865448e5a..553d44ac59b 100644
--- a/fastos/src/vespa/fastos/timestamp.cpp
+++ b/fastos/src/vespa/fastos/timestamp.cpp
@@ -46,4 +46,22 @@ time_t time() {
     return system_clock::to_time_t(system_clock::now());
 }
 
+namespace {
+
+TimeStamp steady_now() {
+    return duration_cast<nanoseconds>(steady_clock::now().time_since_epoch()).count();
+}
+
+}
+void
+StopWatch::start() {
+    _startTime = steady_now();
+    _stopTime = _startTime;
+}
+
+void
+StopWatch::stop()  {
+    _stopTime = steady_now();
+}
+
 }
diff --git a/fastos/src/vespa/fastos/timestamp.h b/fastos/src/vespa/fastos/timestamp.h
index fd46d200b52..6df83457258 100644
--- a/fastos/src/vespa/fastos/timestamp.h
+++ b/fastos/src/vespa/fastos/timestamp.h
@@ -59,23 +59,21 @@ class ClockSystem
 {
 public:
     static int64_t now();
-    static int64_t adjustTick2Sec(int64_t tick) { return tick; }
 };
 
-template <typename ClockT>
-class StopWatchT : public ClockT
+class StopWatch
 {
 public:
-    StopWatchT(void) : _startTime(), _stopTime() { }
+    StopWatch() : _startTime(), _stopTime() { }
 
-    void start() { _startTime = this->now(); _stopTime = _startTime; }
-    void stop()  { _stopTime = this->now(); }
+    void start();
+    void stop();
 
-    TimeStamp startTime()       const { return this->adjustTick2Sec(_startTime); }
+    TimeStamp startTime() const { return _startTime; }
 
     TimeStamp elapsed() const {
         TimeStamp diff(_stopTime - _startTime);
-        return this->adjustTick2Sec((diff > 0) ? diff : TimeStamp(0));
+        return (diff > 0) ? diff : TimeStamp(0);
     }
 private:
     TimeStamp _startTime;
@@ -84,9 +82,5 @@ private:
 
 time_t time();
 
-
-typedef StopWatchT<ClockSystem> TickStopWatch;
-typedef TickStopWatch          StopWatch;
-
 }