Adrian Hunter | faf9670 | 2013-08-27 11:23:08 +0300 | [diff] [blame] | 1 | #include "evlist.h" |
| 2 | #include "evsel.h" |
| 3 | #include "cpumap.h" |
Adrian Hunter | 7556257 | 2013-08-27 11:23:09 +0300 | [diff] [blame^] | 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 | } |
Adrian Hunter | faf9670 | 2013-08-27 11:23:08 +0300 | [diff] [blame] | 74 | |
| 75 | void perf_evlist__config(struct perf_evlist *evlist, |
| 76 | struct perf_record_opts *opts) |
| 77 | { |
| 78 | struct perf_evsel *evsel; |
Adrian Hunter | 7556257 | 2013-08-27 11:23:09 +0300 | [diff] [blame^] | 79 | bool use_sample_identifier = false; |
| 80 | |
Adrian Hunter | faf9670 | 2013-08-27 11:23:08 +0300 | [diff] [blame] | 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 | |
Adrian Hunter | 7556257 | 2013-08-27 11:23:09 +0300 | [diff] [blame^] | 91 | list_for_each_entry(evsel, &evlist->entries, node) |
Adrian Hunter | faf9670 | 2013-08-27 11:23:08 +0300 | [diff] [blame] | 92 | perf_evsel__config(evsel, opts); |
| 93 | |
Adrian Hunter | 7556257 | 2013-08-27 11:23:09 +0300 | [diff] [blame^] | 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); |
Adrian Hunter | faf9670 | 2013-08-27 11:23:08 +0300 | [diff] [blame] | 105 | } |
Adrian Hunter | 7556257 | 2013-08-27 11:23:09 +0300 | [diff] [blame^] | 106 | |
| 107 | perf_evlist__set_id_pos(evlist); |
Adrian Hunter | faf9670 | 2013-08-27 11:23:08 +0300 | [diff] [blame] | 108 | } |