group_pmc56_exclude_constraints_test.c

 1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * Copyright 2022, Athira Rajeev, IBM Corp.
 4 */
 5
 6#include <stdio.h>
 7#include "../event.h"
 8#include <sys/prctl.h>
 9#include <limits.h>
10#include "../sampling_tests/misc.h"
11
12/*
13 * Testcase for group constraint check for
14 * Performance Monitor Counter 5 (PMC5) and also
15 * Performance Monitor Counter 6 (PMC6).
16 * Test that pmc5/6 is excluded from constraint
17 * check when scheduled along with group of events.
18 */
19
20static int group_pmc56_exclude_constraints(void)
21{
22	struct event *e, events[3];
23	int i;
24
25	/* Check for platform support for the test */
26	SKIP_IF(platform_check_for_tests());
27
28	/*
29	 * PMC5/6 is excluded from constraint bit
30	 * check along with group of events. Use
31	 * group of events with PMC5, PMC6 and also
32	 * event with cache bit (dc_ic) set. Test expects
33	 * this set of events to go in as a group.
34	 */
35	e = &events[0];
36	event_init(e, 0x500fa);
37
38	e = &events[1];
39	event_init(e, 0x600f4);
40
41	e = &events[2];
42	event_init(e, 0x22C040);
43
44	FAIL_IF(event_open(&events[0]));
45
46	/*
47	 * The event_open will fail if constraint check fails.
48	 * Since we are asking for events in a group and since
49	 * PMC5/PMC6 is excluded from group constraints, even_open
50	 * should pass.
51	 */
52	for (i = 1; i < 3; i++)
53		FAIL_IF(event_open_with_group(&events[i], events[0].fd));
54
55	for (i = 0; i < 3; i++)
56		event_close(&events[i]);
57
58	return 0;
59}
60
61int main(void)
62{
63	return test_harness(group_pmc56_exclude_constraints, "group_pmc56_exclude_constraints");
64}