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#include <sys/ioctl.h>
9
10#include "ebb.h"
11
12
13/*
14 * Test counting multiple events using EBBs.
15 */
16int multi_counter(void)
17{
18 struct event events[6];
19 int i, group_fd;
20
21 SKIP_IF(!ebb_is_supported());
22
23 event_init_named(e: &events[0], config: 0x1001C, name: "PM_CMPLU_STALL_THRD");
24 event_init_named(e: &events[1], config: 0x2D016, name: "PM_CMPLU_STALL_FXU");
25 event_init_named(e: &events[2], config: 0x30006, name: "PM_CMPLU_STALL_OTHER_CMPL");
26 event_init_named(e: &events[3], config: 0x4000A, name: "PM_CMPLU_STALL");
27 event_init_named(e: &events[4], config: 0x600f4, name: "PM_RUN_CYC");
28 event_init_named(e: &events[5], config: 0x500fa, name: "PM_RUN_INST_CMPL");
29
30 event_leader_ebb_init(e: &events[0]);
31 for (i = 1; i < 6; i++)
32 event_ebb_init(e: &events[i]);
33
34 group_fd = -1;
35 for (i = 0; i < 6; i++) {
36 events[i].attr.exclude_kernel = 1;
37 events[i].attr.exclude_hv = 1;
38 events[i].attr.exclude_idle = 1;
39
40 FAIL_IF(event_open_with_group(e: &events[i], group_fd));
41 if (group_fd == -1)
42 group_fd = events[0].fd;
43 }
44
45 ebb_enable_pmc_counting(pmc: 1);
46 ebb_enable_pmc_counting(pmc: 2);
47 ebb_enable_pmc_counting(pmc: 3);
48 ebb_enable_pmc_counting(pmc: 4);
49 ebb_enable_pmc_counting(pmc: 5);
50 ebb_enable_pmc_counting(pmc: 6);
51 setup_ebb_handler(standard_ebb_callee);
52
53 FAIL_IF(ioctl(events[0].fd, PERF_EVENT_IOC_ENABLE, PERF_IOC_FLAG_GROUP));
54 FAIL_IF(event_read(e: &events[0]));
55
56 ebb_global_enable();
57
58 mtspr(SPRN_PMC1, pmc_sample_period(value: sample_period));
59 mtspr(SPRN_PMC2, pmc_sample_period(value: sample_period));
60 mtspr(SPRN_PMC3, pmc_sample_period(value: sample_period));
61 mtspr(SPRN_PMC4, pmc_sample_period(value: sample_period));
62 mtspr(SPRN_PMC5, pmc_sample_period(value: sample_period));
63 mtspr(SPRN_PMC6, pmc_sample_period(value: sample_period));
64
65 while (ebb_state.stats.ebb_count < 50) {
66 FAIL_IF(core_busy_loop());
67 FAIL_IF(ebb_check_mmcr0());
68 }
69
70 ebb_global_disable();
71 ebb_freeze_pmcs();
72
73 dump_ebb_state();
74
75 for (i = 0; i < 6; i++)
76 event_close(e: &events[i]);
77
78 FAIL_IF(ebb_state.stats.ebb_count == 0);
79
80 return 0;
81}
82
83int main(void)
84{
85 return test_harness(multi_counter, "multi_counter");
86}
87

source code of linux/tools/testing/selftests/powerpc/pmu/ebb/multi_counter_test.c