1 // SPDX-License-Identifier: GPL-2.0-only
2 #include <errno.h>
3 #include <inttypes.h>
4 #include "cpumap.h"
5 #include "evlist.h"
6 #include "evsel.h"
7 #include "../perf.h"
8 #include "util/pmu-hybrid.h"
9 #include "util/evlist-hybrid.h"
10 #include "debug.h"
11 #include <unistd.h>
12 #include <stdlib.h>
13 #include <linux/err.h>
14 #include <linux/string.h>
15 #include <perf/evlist.h>
16 #include <perf/evsel.h>
17 #include <perf/cpumap.h>
18
evlist__add_default_hybrid(struct evlist * evlist,bool precise)19 int evlist__add_default_hybrid(struct evlist *evlist, bool precise)
20 {
21 struct evsel *evsel;
22 struct perf_pmu *pmu;
23 __u64 config;
24 struct perf_cpu_map *cpus;
25
26 perf_pmu__for_each_hybrid_pmu(pmu) {
27 config = PERF_COUNT_HW_CPU_CYCLES |
28 ((__u64)pmu->type << PERF_PMU_TYPE_SHIFT);
29 evsel = evsel__new_cycles(precise, PERF_TYPE_HARDWARE,
30 config);
31 if (!evsel)
32 return -ENOMEM;
33
34 cpus = perf_cpu_map__get(pmu->cpus);
35 evsel->core.cpus = cpus;
36 evsel->core.own_cpus = perf_cpu_map__get(cpus);
37 evsel->pmu_name = strdup(pmu->name);
38 evlist__add(evlist, evsel);
39 }
40
41 return 0;
42 }
43
group_hybrid_conflict(struct evsel * leader)44 static bool group_hybrid_conflict(struct evsel *leader)
45 {
46 struct evsel *pos, *prev = NULL;
47
48 for_each_group_evsel(pos, leader) {
49 if (!evsel__is_hybrid(pos))
50 continue;
51
52 if (prev && strcmp(prev->pmu_name, pos->pmu_name))
53 return true;
54
55 prev = pos;
56 }
57
58 return false;
59 }
60
evlist__warn_hybrid_group(struct evlist * evlist)61 void evlist__warn_hybrid_group(struct evlist *evlist)
62 {
63 struct evsel *evsel;
64
65 evlist__for_each_entry(evlist, evsel) {
66 if (evsel__is_group_leader(evsel) &&
67 evsel->core.nr_members > 1 &&
68 group_hybrid_conflict(evsel)) {
69 pr_warning("WARNING: events in group from "
70 "different hybrid PMUs!\n");
71 return;
72 }
73 }
74 }
75
evlist__has_hybrid(struct evlist * evlist)76 bool evlist__has_hybrid(struct evlist *evlist)
77 {
78 struct evsel *evsel;
79
80 evlist__for_each_entry(evlist, evsel) {
81 if (evsel->pmu_name &&
82 perf_pmu__is_hybrid(evsel->pmu_name)) {
83 return true;
84 }
85 }
86
87 return false;
88 }
89
evlist__fix_hybrid_cpus(struct evlist * evlist,const char * cpu_list)90 int evlist__fix_hybrid_cpus(struct evlist *evlist, const char *cpu_list)
91 {
92 struct perf_cpu_map *cpus;
93 struct evsel *evsel, *tmp;
94 struct perf_pmu *pmu;
95 int ret, unmatched_count = 0, events_nr = 0;
96
97 if (!perf_pmu__has_hybrid() || !cpu_list)
98 return 0;
99
100 cpus = perf_cpu_map__new(cpu_list);
101 if (!cpus)
102 return -1;
103
104 /*
105 * The evsels are created with hybrid pmu's cpus. But now we
106 * need to check and adjust the cpus of evsel by cpu_list because
107 * cpu_list may cause conflicts with cpus of evsel. For example,
108 * cpus of evsel is cpu0-7, but the cpu_list is cpu6-8, we need
109 * to adjust the cpus of evsel to cpu6-7. And then propatate maps
110 * in evlist__create_maps().
111 */
112 evlist__for_each_entry_safe(evlist, tmp, evsel) {
113 struct perf_cpu_map *matched_cpus, *unmatched_cpus;
114 char buf1[128], buf2[128];
115
116 pmu = perf_pmu__find_hybrid_pmu(evsel->pmu_name);
117 if (!pmu)
118 continue;
119
120 ret = perf_pmu__cpus_match(pmu, cpus, &matched_cpus,
121 &unmatched_cpus);
122 if (ret)
123 goto out;
124
125 events_nr++;
126
127 if (matched_cpus->nr > 0 && (unmatched_cpus->nr > 0 ||
128 matched_cpus->nr < cpus->nr ||
129 matched_cpus->nr < pmu->cpus->nr)) {
130 perf_cpu_map__put(evsel->core.cpus);
131 perf_cpu_map__put(evsel->core.own_cpus);
132 evsel->core.cpus = perf_cpu_map__get(matched_cpus);
133 evsel->core.own_cpus = perf_cpu_map__get(matched_cpus);
134
135 if (unmatched_cpus->nr > 0) {
136 cpu_map__snprint(matched_cpus, buf1, sizeof(buf1));
137 pr_warning("WARNING: use %s in '%s' for '%s', skip other cpus in list.\n",
138 buf1, pmu->name, evsel->name);
139 }
140 }
141
142 if (matched_cpus->nr == 0) {
143 evlist__remove(evlist, evsel);
144 evsel__delete(evsel);
145
146 cpu_map__snprint(cpus, buf1, sizeof(buf1));
147 cpu_map__snprint(pmu->cpus, buf2, sizeof(buf2));
148 pr_warning("WARNING: %s isn't a '%s', please use a CPU list in the '%s' range (%s)\n",
149 buf1, pmu->name, pmu->name, buf2);
150 unmatched_count++;
151 }
152
153 perf_cpu_map__put(matched_cpus);
154 perf_cpu_map__put(unmatched_cpus);
155 }
156
157 ret = (unmatched_count == events_nr) ? -1 : 0;
158 out:
159 perf_cpu_map__put(cpus);
160 return ret;
161 }
162