From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joerg Vehlow Date: Wed, 25 Sep 2019 11:29:58 +0200 Subject: [LTP] [PATCH] open_posix/conformance/clock/1.1: Deterministic timing Message-ID: <20190925092958.125325-1-lkml@jv-coder.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: ltp@lists.linux.it From: Joerg Vehlow On some systems the loop with 8 million iterations takes a very long time. This patches changes it to busy loop for five seconds. Signed-off-by: Joerg Vehlow --- .../conformance/interfaces/clock/1-1.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/testcases/open_posix_testsuite/conformance/interfaces/clock/1-1.c b/testcases/open_posix_testsuite/conformance/interfaces/clock/1-1.c index 9c48cd979..cce5beea9 100644 --- a/testcases/open_posix_testsuite/conformance/interfaces/clock/1-1.c +++ b/testcases/open_posix_testsuite/conformance/interfaces/clock/1-1.c @@ -17,20 +17,22 @@ #include #include #include +#include #include "posixtest.h" -#define LARGENUMBER 8000000 +#define BUSY_LOOP_SECONDS 5 int main(void) { clock_t c1, c2; double sec1, sec2; - int i; + time_t end; c1 = clock(); sec1 = c1 / CLOCKS_PER_SEC; - for (i = 0; i < LARGENUMBER; i++) { - // keep busy so CPU time increases + end = time(NULL) + BUSY_LOOP_SECONDS; + + while (end >= time(NULL)) { clock(); } -- 2.20.1