Add performance measurements to mbedtls tests (Mbed-TLS#6)

Also add get timer in [uS] to timing library
NirEkhauz · Dec 28, 2017 · d525688 · d525688
1 parent 4b660ec
commit d525688
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diff --git a/include/mbedtls/timing.h b/include/mbedtls/timing.h
@@ -71,6 +71,16 @@ extern volatile int mbedtls_timing_alarmed;
  */
 unsigned long mbedtls_timing_hardclock( void );
 
+/**
+ * \brief          Return the elapsed time in micro seconds
+ *
+ * \param val      points to a timer structure
+ * \param reset    if set to 1, the timer is restarted
+ */
+
+unsigned long long mbedtls_timing_get_timer_us( struct mbedtls_timing_hr_time *val, int reset );
+
+
 /**
  * \brief          Return the elapsed time in milliseconds
  *
@@ -88,6 +98,7 @@ unsigned long mbedtls_timing_hardclock( void );
  *                 get_timer(0) }` the value time1+time2 is only approximately
  *                 the delay since the first reset.
  */
+
 unsigned long mbedtls_timing_get_timer( struct mbedtls_timing_hr_time *val, int reset );
 
 /**

diff --git a/library/timing.c b/library/timing.c
@@ -305,6 +305,27 @@ unsigned long mbedtls_timing_get_timer( struct mbedtls_timing_hr_time *val, int
     }
 }
 
+unsigned long long mbedtls_timing_get_timer_us( struct mbedtls_timing_hr_time *val, int reset )
+{
+    unsigned long long delta;
+    struct timeval offset;
+    struct _hr_time *t = (struct _hr_time *) val;
+
+    gettimeofday( &offset, NULL );
+
+    if( reset )
+    {
+        t->start.tv_sec  = offset.tv_sec;
+        t->start.tv_usec = offset.tv_usec;
+        return( 0 );
+    }
+
+    delta = ( offset.tv_sec  - t->start.tv_sec  ) * 1000 * 1000
+          + ( offset.tv_usec - t->start.tv_usec ) ;
+
+    return( delta );
+}
+
 static void sighandler( int signum )
 {
     mbedtls_timing_alarmed = 1;