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-rw-r--r--open_issues/performance/io_system/test-lseek.c5
-rw-r--r--open_issues/performance/io_system/test-mach.c5
2 files changed, 6 insertions, 4 deletions
diff --git a/open_issues/performance/io_system/test-lseek.c b/open_issues/performance/io_system/test-lseek.c
index 691e9d07..667dce66 100644
--- a/open_issues/performance/io_system/test-lseek.c
+++ b/open_issues/performance/io_system/test-lseek.c
@@ -3,14 +3,15 @@
#include <fcntl.h>
#include <unistd.h>
#include <sys/time.h>
+#define N 100000
int main(void) {
int fd = open("test.c", O_RDONLY);
struct timeval tv1, tv2;
int i;
gettimeofday(&tv1, NULL);
- for (i = 0; i < 100000; i++)
+ for (i = 0; i < N; i++)
lseek(fd, 0, SEEK_CUR);
gettimeofday(&tv2, NULL);
- printf("%07lu\n", (tv2.tv_sec-tv1.tv_sec) * 1000000 + tv2.tv_usec - tv1.tv_usec);
+ printf("%fµs\n", (float)((tv2.tv_sec-tv1.tv_sec) * 1000000 + tv2.tv_usec - tv1.tv_usec)/N);
return 0;
}
diff --git a/open_issues/performance/io_system/test-mach.c b/open_issues/performance/io_system/test-mach.c
index 44f62a4e..90337346 100644
--- a/open_issues/performance/io_system/test-mach.c
+++ b/open_issues/performance/io_system/test-mach.c
@@ -2,6 +2,7 @@
#include <stdio.h>
#include <fcntl.h>
#include <mach/mach.h>
+#define N 1000000
int main(void) {
struct timeval tv1, tv2;
int i;
@@ -9,10 +10,10 @@ int main(void) {
task = mach_task_self();
mach_port_urefs_t refs;
gettimeofday(&tv1, NULL);
- for (i = 0; i < 1000000; i++) {
+ for (i = 0; i < N; i++) {
mach_port_get_refs(task, task, MACH_PORT_RIGHT_RECEIVE, &refs);
}
gettimeofday(&tv2, NULL);
- printf("%07lu\n", (tv2.tv_sec-tv1.tv_sec) * 1000000 + tv2.tv_usec - tv1.tv_usec);
+ printf("%fµs\n", (float)((tv2.tv_sec-tv1.tv_sec) * 1000000 + tv2.tv_usec - tv1.tv_usec)/N);
return 0;
}