move all projects into the trunk directory

[lttv.git] / trunk / tests / user / test-usertrace-time.c

diff --git a/trunk/tests/user/test-usertrace-time.c b/trunk/tests/user/test-usertrace-time.c
new file mode 100644 (file)
index 0000000..7d007e1
--- /dev/null
+++ b/trunk/tests/user/test-usertrace-time.c
@@ -0,0 +1,47 @@
+
+#include <stdio.h>
+#include <unistd.h>
+#include <asm/timex.h>
+
+#define LTT_TRACE
+#define LTT_TRACE_FAST
+#include <ltt/ltt-facility-user_tests.h>
+
+#define max(a,b) ((a)>(b)?(a):(b))
+#define min(a,b) ((a)<(b)?(a):(b))
+
+/* Event logged : 4 bytes + 20 bytes header = 24 bytes. Let's use 1MB of
+ * buffers. 1MB / 24bytes = 43690. So, if we write 20000 event, we should not
+ * lose events. Check event lost count after tests. */
+
+#define NR_LOOPS 20000
+
+typedef unsigned long long cycles_t;
+
+int main(int argc, char **argv)
+{
+       unsigned int i;
+       cycles_t time1, time2, time;
+       cycles_t max_time = 0, min_time = 18446744073709551615ULL; /* (2^64)-1 */
+       cycles_t tot_time = 0;
+
+       for(i=0; i<NR_LOOPS; i++) {
+               time1 = get_cycles();
+               trace_user_tests_write_4bytes(5000);
+               time2 = get_cycles();
+               time = time2 - time1;
+               max_time = max(max_time, time);
+               min_time = min(min_time, time);
+               tot_time += time;
+       }
+       
+  printf("test results : time per probe (in cycles)\n");
+  printf("number of loops : %d\n", NR_LOOPS);
+  printf("total time : %llu\n", tot_time);
+  printf("average time : %g\n", tot_time/(double)NR_LOOPS);
+  printf("min : %llu\n", min_time);
+  printf("max : %llu\n", max_time);
+       
+       return 0;
+}
+