1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright 2014, Michael Ellerman, IBM Corp.
4 */
5
6 #include <stdio.h>
7 #include <stdlib.h>
8
9 #include "ebb.h"
10
11
12 /*
13 * Basic test that counts user cycles and takes EBBs.
14 */
15 int cycles(void)
16 {
17 struct event event;
18
19 SKIP_IF(!ebb_is_supported());
20
21 event_init_named(&event, 0x1001e, "cycles");
22 event_leader_ebb_init(&event);
23
24 event.attr.exclude_kernel = 1;
25 event.attr.exclude_hv = 1;
26 event.attr.exclude_idle = 1;
27
28 FAIL_IF(event_open(&event));
29
30 ebb_enable_pmc_counting(1);
31 setup_ebb_handler(standard_ebb_callee);
32 ebb_global_enable();
33 FAIL_IF(ebb_event_enable(&event));
34
35 mtspr(SPRN_PMC1, pmc_sample_period(sample_period));
36
37 while (ebb_state.stats.ebb_count < 10) {
38 FAIL_IF(core_busy_loop());
39 FAIL_IF(ebb_check_mmcr0());
40 }
41
42 ebb_global_disable();
43 ebb_freeze_pmcs();
44
45 dump_ebb_state();
46
47 event_close(&event);
48
49 FAIL_IF(ebb_state.stats.ebb_count == 0);
50 FAIL_IF(!ebb_check_count(1, sample_period, 100));
51
52 return 0;
53 }
54
55 int main(void)
56 {
57 return test_harness(cycles, "cycles");
58 }
59
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