1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
|
// SPDX-License-Identifier: GPL-2.0
#include <string.h>
#include <unistd.h>
#include <stdio.h>
#include "linux/perf_event.h"
#include "tests.h"
#include "debug.h"
#include "pmu.h"
#include "pmus.h"
#include "header.h"
#include "../perf-sys.h"
/* hw: cycles, sw: context-switch, uncore: [arch dependent] */
static int types[] = {0, 1, -1};
static unsigned long configs[] = {0, 3, 0};
#define NR_UNCORE_PMUS 5
/* Uncore pmus that support more than 3 counters */
static struct uncore_pmus {
const char *name;
__u64 config;
} uncore_pmus[NR_UNCORE_PMUS] = {
{ "amd_l3", 0x0 },
{ "amd_df", 0x0 },
{ "uncore_imc_0", 0x1 }, /* Intel */
{ "core_imc", 0x318 }, /* PowerPC: core_imc/CPM_STCX_FIN/ */
{ "hv_24x7", 0x22000000003 }, /* PowerPC: hv_24x7/CPM_STCX_FIN/ */
};
static int event_open(int type, unsigned long config, int group_fd)
{
struct perf_event_attr attr;
memset(&attr, 0, sizeof(struct perf_event_attr));
attr.type = type;
attr.size = sizeof(struct perf_event_attr);
attr.config = config;
/*
* When creating an event group, typically the group leader is
* initialized with disabled set to 1 and any child events are
* initialized with disabled set to 0. Despite disabled being 0,
* the child events will not start until the group leader is
* enabled.
*/
attr.disabled = group_fd == -1 ? 1 : 0;
return sys_perf_event_open(&attr, -1, 0, group_fd, 0);
}
static int setup_uncore_event(void)
{
struct perf_pmu *pmu;
int i;
if (list_empty(&pmus))
perf_pmu__scan(NULL);
perf_pmus__for_each_pmu(pmu) {
for (i = 0; i < NR_UNCORE_PMUS; i++) {
if (!strcmp(uncore_pmus[i].name, pmu->name)) {
pr_debug("Using %s for uncore pmu event\n", pmu->name);
types[2] = pmu->type;
configs[2] = uncore_pmus[i].config;
return 0;
}
}
}
return -1;
}
static int run_test(int i, int j, int k)
{
int erroneous = ((((1 << i) | (1 << j) | (1 << k)) & 5) == 5);
int group_fd, sibling_fd1, sibling_fd2;
group_fd = event_open(types[i], configs[i], -1);
if (group_fd == -1)
return -1;
sibling_fd1 = event_open(types[j], configs[j], group_fd);
if (sibling_fd1 == -1) {
close(group_fd);
return erroneous ? 0 : -1;
}
sibling_fd2 = event_open(types[k], configs[k], group_fd);
if (sibling_fd2 == -1) {
close(sibling_fd1);
close(group_fd);
return erroneous ? 0 : -1;
}
close(sibling_fd2);
close(sibling_fd1);
close(group_fd);
return erroneous ? -1 : 0;
}
static int test__event_groups(struct test_suite *text __maybe_unused, int subtest __maybe_unused)
{
int i, j, k;
int ret;
int r;
ret = setup_uncore_event();
if (ret || types[2] == -1)
return TEST_SKIP;
ret = TEST_OK;
for (i = 0; i < 3; i++) {
for (j = 0; j < 3; j++) {
for (k = 0; k < 3; k++) {
r = run_test(i, j, k);
if (r)
ret = TEST_FAIL;
pr_debug("0x%x 0x%lx, 0x%x 0x%lx, 0x%x 0x%lx: %s\n",
types[i], configs[i], types[j], configs[j],
types[k], configs[k], r ? "Fail" : "Pass");
}
}
}
return ret;
}
DEFINE_SUITE("Event groups", event_groups);
|
