syscalls: Add timer measurement library
This commit adds a timer measurement library, mostly based on changes
done to the pselect01.c test and changes all tests that measure timer
precision to use it.
The timer testcases that measure timeouts now just define sampling function and
optional setup and cleanup. The rest of the functionality is implemented in the
lib/tst_timer_test.c library. This change not only removes fair amount of
duplicated code but also allows us to tune thresholds and define testcases in a
single place for all testcases.
The timer measurement library also supports for passing sleep time and
number of iterations as a command-line parameters, can print nifty
frequency plot into the terminal, as well as save test measurements into
a text file.
Signed-off-by: Cyril Hrubis <chrubis@suse.cz>
Acked-by: Jan Stancek <jstancek@redhat.com>
diff --git a/lib/tst_test.c b/lib/tst_test.c
index 794aa85..16ea64f 100644
--- a/lib/tst_test.c
+++ b/lib/tst_test.c
@@ -30,6 +30,7 @@
#include "tst_device.h"
#include "lapi/futex.h"
#include "tst_ansi_color.h"
+#include "tst_timer_test.h"
#include "old_resource.h"
#include "old_device.h"
@@ -635,26 +636,45 @@
static struct tst_device tdev;
struct tst_device *tst_device;
+static void assert_test_fn(void)
+{
+ int cnt = 0;
+
+ if (tst_test->test)
+ cnt++;
+
+ if (tst_test->test_all)
+ cnt++;
+
+ if (tst_test->sample)
+ cnt++;
+
+ if (!cnt)
+ tst_brk(TBROK, "No test function speficied");
+
+ if (cnt != 1)
+ tst_brk(TBROK, "You can define only one test function");
+
+ if (tst_test->test && !tst_test->tcnt)
+ tst_brk(TBROK, "Number of tests (tcnt) must not be > 0");
+
+ if (!tst_test->test && tst_test->tcnt)
+ tst_brk(TBROK, "You can define tcnt only for test()");
+}
+
static void do_setup(int argc, char *argv[])
{
if (!tst_test)
tst_brk(TBROK, "No tests to run");
+ assert_test_fn();
+
+ if (tst_test->sample)
+ tst_test = tst_timer_test_setup(tst_test);
+
if (!tst_test->tid)
tst_test->tid = get_tid(argv);
- if (!tst_test->test && !tst_test->test_all)
- tst_brk(TBROK, "No test function speficied");
-
- if (tst_test->test && tst_test->test_all)
- tst_brk(TBROK, "You can define either test() or test_all()");
-
- if (tst_test->test && !tst_test->tcnt)
- tst_brk(TBROK, "Number of tests (tcnt) must not be > 0");
-
- if (tst_test->test_all && tst_test->tcnt)
- tst_brk(TBROK, "You can't define tcnt for test_all()");
-
if (tst_test->needs_root && geteuid() != 0)
tst_brk(TCONF, "Test needs to be run as root");