This utility gives a finer grain to wait for smaller amount of time.
This is useful for waiting the delay between each frequency change.
Signed-off-by: Daniel Lezcano <daniel.lezc...@linaro.org>
---
utils/nanosleep.c | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 55 insertions(+), 0 deletions(-)
create mode 100644 utils/nanosleep.c
diff --git a/utils/nanosleep.c b/utils/nanosleep.c
new file mode 100644
index 0000000..f366e53
--- /dev/null
+++ b/utils/nanosleep.c
@@ -0,0 +1,55 @@
+/*******************************************************************************
+ * PM-QA validation test suite for the power management on ARM
+ *
+ * Copyright (C) 2011, Linaro Limited.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
USA.
+ *
+ * Contributors:
+ * Daniel Lezcano <daniel.lezc...@linaro.org> (IBM Corporation)
+ * - initial API and implementation
+ *
+
*******************************************************************************/
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <time.h>
+
+int main(int argc, char *argv[])
+{
+ struct timespec req = { 0 }, rem = { 0 };
+
+ if (argc != 2) {
+ fprintf(stderr, "%s <nanoseconds>\n", argv[0]);
+ return 1;
+ }
+
+ req.tv_nsec = atoi(argv[1]);
+
+ for (;;) {
+ if (!nanosleep(&req, &rem))
+ break;
+
+ if (errno == EINTR) {
+ req = rem;
+ continue;
+ }
+
+ perror("failed to nanosleep");
+ return 1;
+ }
+
+ return 0;
+}
--
1.7.4.1
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