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 "../sampling_tests/misc.h" |
9 | |
10 | /* |
11 | * Testcase for number of counters in use. |
12 | * The number of programmable counters is from |
13 | * performance monitor counter 1 to performance |
14 | * monitor counter 4 (PMC1-PMC4). If number of |
15 | * counters in use exceeds the limit, next event |
16 | * should fail to schedule. |
17 | */ |
18 | |
19 | static int group_constraint_pmc_count(void) |
20 | { |
21 | struct event *e, events[5]; |
22 | int i; |
23 | |
24 | /* Check for platform support for the test */ |
25 | SKIP_IF(platform_check_for_tests()); |
26 | |
27 | /* |
28 | * Test for number of counters in use. |
29 | * Use PMC1 to PMC4 for leader and 3 sibling |
30 | * events. Trying to open fourth event should |
31 | * fail here. |
32 | */ |
33 | e = &events[0]; |
34 | event_init(e, config: 0x1001a); |
35 | |
36 | e = &events[1]; |
37 | event_init(e, config: 0x200fc); |
38 | |
39 | e = &events[2]; |
40 | event_init(e, config: 0x30080); |
41 | |
42 | e = &events[3]; |
43 | event_init(e, config: 0x40054); |
44 | |
45 | e = &events[4]; |
46 | event_init(e, config: 0x0002c); |
47 | |
48 | FAIL_IF(event_open(e: &events[0])); |
49 | |
50 | /* |
51 | * The event_open will fail on event 4 if constraint |
52 | * check fails |
53 | */ |
54 | for (i = 1; i < 5; i++) { |
55 | if (i == 4) |
56 | FAIL_IF(!event_open_with_group(e: &events[i], group_fd: events[0].fd)); |
57 | else |
58 | FAIL_IF(event_open_with_group(e: &events[i], group_fd: events[0].fd)); |
59 | } |
60 | |
61 | for (i = 1; i < 4; i++) |
62 | event_close(e: &events[i]); |
63 | |
64 | return 0; |
65 | } |
66 | |
67 | int main(void) |
68 | { |
69 | return test_harness(group_constraint_pmc_count, "group_constraint_pmc_count" ); |
70 | } |
71 | |