Commit | Line | Data |
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faf96706 AH |
1 | #include "evlist.h" |
2 | #include "evsel.h" | |
3 | #include "cpumap.h" | |
75562573 AH |
4 | #include "parse-events.h" |
5 | ||
6 | typedef void (*setup_probe_fn_t)(struct perf_evsel *evsel); | |
7 | ||
8 | static int perf_do_probe_api(setup_probe_fn_t fn, int cpu, const char *str) | |
9 | { | |
10 | struct perf_evlist *evlist; | |
11 | struct perf_evsel *evsel; | |
12 | int err = -EAGAIN, fd; | |
13 | ||
14 | evlist = perf_evlist__new(); | |
15 | if (!evlist) | |
16 | return -ENOMEM; | |
17 | ||
18 | if (parse_events(evlist, str)) | |
19 | goto out_delete; | |
20 | ||
21 | evsel = perf_evlist__first(evlist); | |
22 | ||
23 | fd = sys_perf_event_open(&evsel->attr, -1, cpu, -1, 0); | |
24 | if (fd < 0) | |
25 | goto out_delete; | |
26 | close(fd); | |
27 | ||
28 | fn(evsel); | |
29 | ||
30 | fd = sys_perf_event_open(&evsel->attr, -1, cpu, -1, 0); | |
31 | if (fd < 0) { | |
32 | if (errno == EINVAL) | |
33 | err = -EINVAL; | |
34 | goto out_delete; | |
35 | } | |
36 | close(fd); | |
37 | err = 0; | |
38 | ||
39 | out_delete: | |
40 | perf_evlist__delete(evlist); | |
41 | return err; | |
42 | } | |
43 | ||
44 | static bool perf_probe_api(setup_probe_fn_t fn) | |
45 | { | |
46 | const char *try[] = {"cycles:u", "instructions:u", "cpu-clock", NULL}; | |
47 | struct cpu_map *cpus; | |
48 | int cpu, ret, i = 0; | |
49 | ||
50 | cpus = cpu_map__new(NULL); | |
51 | if (!cpus) | |
52 | return false; | |
53 | cpu = cpus->map[0]; | |
54 | cpu_map__delete(cpus); | |
55 | ||
56 | do { | |
57 | ret = perf_do_probe_api(fn, cpu, try[i++]); | |
58 | if (!ret) | |
59 | return true; | |
60 | } while (ret == -EAGAIN && try[i]); | |
61 | ||
62 | return false; | |
63 | } | |
64 | ||
65 | static void perf_probe_sample_identifier(struct perf_evsel *evsel) | |
66 | { | |
67 | evsel->attr.sample_type |= PERF_SAMPLE_IDENTIFIER; | |
68 | } | |
69 | ||
70 | bool perf_can_sample_identifier(void) | |
71 | { | |
72 | return perf_probe_api(perf_probe_sample_identifier); | |
73 | } | |
faf96706 AH |
74 | |
75 | void perf_evlist__config(struct perf_evlist *evlist, | |
76 | struct perf_record_opts *opts) | |
77 | { | |
78 | struct perf_evsel *evsel; | |
75562573 AH |
79 | bool use_sample_identifier = false; |
80 | ||
faf96706 AH |
81 | /* |
82 | * Set the evsel leader links before we configure attributes, | |
83 | * since some might depend on this info. | |
84 | */ | |
85 | if (opts->group) | |
86 | perf_evlist__set_leader(evlist); | |
87 | ||
88 | if (evlist->cpus->map[0] < 0) | |
89 | opts->no_inherit = true; | |
90 | ||
75562573 | 91 | list_for_each_entry(evsel, &evlist->entries, node) |
faf96706 AH |
92 | perf_evsel__config(evsel, opts); |
93 | ||
75562573 AH |
94 | if (evlist->nr_entries > 1) { |
95 | struct perf_evsel *first = perf_evlist__first(evlist); | |
96 | ||
97 | list_for_each_entry(evsel, &evlist->entries, node) { | |
98 | if (evsel->attr.sample_type == first->attr.sample_type) | |
99 | continue; | |
100 | use_sample_identifier = perf_can_sample_identifier(); | |
101 | break; | |
102 | } | |
103 | list_for_each_entry(evsel, &evlist->entries, node) | |
104 | perf_evsel__set_sample_id(evsel, use_sample_identifier); | |
faf96706 | 105 | } |
75562573 AH |
106 | |
107 | perf_evlist__set_id_pos(evlist); | |
faf96706 | 108 | } |