add simple cache benchmark application

1 files changed, 16 insertions, 2 deletions

diff --git a/src/arch/posix/driver/uptime.cc b/src/arch/posix/driver/uptime.cc
index 040b51c..00b1d34 100644
--- a/src/arch/posix/driver/uptime.cc
+++ b/src/arch/posix/driver/uptime.cc
@@ -1,11 +1,25 @@
 #include "driver/uptime.h"
 #include <time.h>
 
-uint64_t Uptime::get()
+uint64_t Uptime::get_s()
 {
 	struct timespec ts;
 	clock_gettime(CLOCK_REALTIME, &ts);
-	return (uint64_t)ts.tv_nsec + (1000000ULL * ((uint64_t)ts.tv_sec % 256));
+	return ts.tv_sec;
+}
+
+uint64_t Uptime::get_us()
+{
+	struct timespec ts;
+	clock_gettime(CLOCK_REALTIME, &ts);
+	return ts.tv_nsec / 1000;
+}
+
+uint64_t Uptime::get_cycles()
+{
+	struct timespec ts;
+	clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &ts);
+	return ts.tv_nsec;
 }
 
 Uptime uptime;