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authorThomas Schwinge <thomas@schwinge.name>2011-11-05 23:19:34 +0100
committerThomas Schwinge <thomas@schwinge.name>2011-11-05 23:19:34 +0100
commit4cc3f682fb57a920e3cc14e99323d66e380c1ee7 (patch)
treea229f63ded16b837b11b5ca73c568380d793efe0 /open_issues/xen_lseek/test-lseek.c
parentba985e9b5f15933e9b8c33d63cf903972c75e913 (diff)
open_issues/performance/io_system/binutils_ld_64ksec: Move Xen lseek stuff...
open_issues/xen_lseek: ... here.
Diffstat (limited to 'open_issues/xen_lseek/test-lseek.c')
-rw-r--r--open_issues/xen_lseek/test-lseek.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/open_issues/xen_lseek/test-lseek.c b/open_issues/xen_lseek/test-lseek.c
new file mode 100644
index 00000000..667dce66
--- /dev/null
+++ b/open_issues/xen_lseek/test-lseek.c
@@ -0,0 +1,17 @@
+#include <stdio.h>
+#include <math.h>
+#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 < N; i++)
+ lseek(fd, 0, SEEK_CUR);
+ gettimeofday(&tv2, NULL);
+ printf("%fµs\n", (float)((tv2.tv_sec-tv1.tv_sec) * 1000000 + tv2.tv_usec - tv1.tv_usec)/N);
+ return 0;
+}