summaryrefslogtreecommitdiff
path: root/tools/perf/util/pfm.c
blob: 756295dedcccce5295146cdb2d5ba0c53895691d (plain)
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
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
// SPDX-License-Identifier: GPL-2.0
/*
 * Support for libpfm4 event encoding.
 *
 * Copyright 2020 Google LLC.
 */
#include "util/cpumap.h"
#include "util/debug.h"
#include "util/event.h"
#include "util/evlist.h"
#include "util/evsel.h"
#include "util/parse-events.h"
#include "util/pmu.h"
#include "util/pfm.h"

#include <string.h>
#include <linux/kernel.h>
#include <perfmon/pfmlib_perf_event.h>

static void libpfm_initialize(void)
{
	int ret;

	ret = pfm_initialize();
	if (ret != PFM_SUCCESS) {
		ui__warning("libpfm failed to initialize: %s\n",
			pfm_strerror(ret));
	}
}

int parse_libpfm_events_option(const struct option *opt, const char *str,
			int unset __maybe_unused)
{
	struct evlist *evlist = *(struct evlist **)opt->value;
	struct perf_event_attr attr;
	struct perf_pmu *pmu;
	struct evsel *evsel, *grp_leader = NULL;
	char *p, *q, *p_orig;
	const char *sep;
	int grp_evt = -1;
	int ret;

	libpfm_initialize();

	p_orig = p = strdup(str);
	if (!p)
		return -1;
	/*
	 * force loading of the PMU list
	 */
	perf_pmu__scan(NULL);

	for (q = p; strsep(&p, ",{}"); q = p) {
		sep = p ? str + (p - p_orig - 1) : "";
		if (*sep == '{') {
			if (grp_evt > -1) {
				ui__error(
					"nested event groups not supported\n");
				goto error;
			}
			grp_evt++;
		}

		/* no event */
		if (*q == '\0') {
			if (*sep == '}') {
				if (grp_evt < 0) {
					ui__error("cannot close a non-existing event group\n");
					goto error;
				}
				grp_evt--;
			}
			continue;
		}

		memset(&attr, 0, sizeof(attr));
		event_attr_init(&attr);

		ret = pfm_get_perf_event_encoding(q, PFM_PLM0|PFM_PLM3,
						&attr, NULL, NULL);

		if (ret != PFM_SUCCESS) {
			ui__error("failed to parse event %s : %s\n", str,
				  pfm_strerror(ret));
			goto error;
		}

		pmu = perf_pmu__find_by_type((unsigned int)attr.type);
		evsel = parse_events__add_event(evlist->core.nr_entries,
						&attr, q, pmu);
		if (evsel == NULL)
			goto error;

		evsel->is_libpfm_event = true;

		evlist__add(evlist, evsel);

		if (grp_evt == 0)
			grp_leader = evsel;

		if (grp_evt > -1) {
			evsel__set_leader(evsel, grp_leader);
			grp_leader->core.nr_members++;
			grp_evt++;
		}

		if (*sep == '}') {
			if (grp_evt < 0) {
				ui__error(
				   "cannot close a non-existing event group\n");
				goto error;
			}
			evlist->core.nr_groups++;
			grp_leader = NULL;
			grp_evt = -1;
		}
	}
	free(p_orig);
	return 0;
error:
	free(p_orig);
	return -1;
}

static const char *srcs[PFM_ATTR_CTRL_MAX] = {
	[PFM_ATTR_CTRL_UNKNOWN] = "???",
	[PFM_ATTR_CTRL_PMU] = "PMU",
	[PFM_ATTR_CTRL_PERF_EVENT] = "perf_event",
};

static void
print_attr_flags(pfm_event_attr_info_t *info)
{
	int n = 0;

	if (info->is_dfl) {
		printf("[default] ");
		n++;
	}

	if (info->is_precise) {
		printf("[precise] ");
		n++;
	}

	if (!n)
		printf("- ");
}

static void
print_libpfm_events_detailed(pfm_event_info_t *info, bool long_desc)
{
	pfm_event_attr_info_t ainfo;
	const char *src;
	int j, ret;

	ainfo.size = sizeof(ainfo);

	printf("  %s\n", info->name);
	printf("    [%s]\n", info->desc);
	if (long_desc) {
		if (info->equiv)
			printf("      Equiv: %s\n", info->equiv);

		printf("      Code  : 0x%"PRIx64"\n", info->code);
	}
	pfm_for_each_event_attr(j, info) {
		ret = pfm_get_event_attr_info(info->idx, j,
					      PFM_OS_PERF_EVENT_EXT, &ainfo);
		if (ret != PFM_SUCCESS)
			continue;

		if (ainfo.type == PFM_ATTR_UMASK) {
			printf("      %s:%s\n", info->name, ainfo.name);
			printf("        [%s]\n", ainfo.desc);
		}

		if (!long_desc)
			continue;

		if (ainfo.ctrl >= PFM_ATTR_CTRL_MAX)
			ainfo.ctrl = PFM_ATTR_CTRL_UNKNOWN;

		src = srcs[ainfo.ctrl];
		switch (ainfo.type) {
		case PFM_ATTR_UMASK:
			printf("        Umask : 0x%02"PRIx64" : %s: ",
				ainfo.code, src);
			print_attr_flags(&ainfo);
			putchar('\n');
			break;
		case PFM_ATTR_MOD_BOOL:
			printf("      Modif : %s: [%s] : %s (boolean)\n", src,
				ainfo.name, ainfo.desc);
			break;
		case PFM_ATTR_MOD_INTEGER:
			printf("      Modif : %s: [%s] : %s (integer)\n", src,
				ainfo.name, ainfo.desc);
			break;
		case PFM_ATTR_NONE:
		case PFM_ATTR_RAW_UMASK:
		case PFM_ATTR_MAX:
		default:
			printf("      Attr  : %s: [%s] : %s\n", src,
				ainfo.name, ainfo.desc);
		}
	}
}

/*
 * list all pmu::event:umask, pmu::event
 * printed events may not be all valid combinations of umask for an event
 */
static void
print_libpfm_events_raw(pfm_pmu_info_t *pinfo, pfm_event_info_t *info)
{
	pfm_event_attr_info_t ainfo;
	int j, ret;
	bool has_umask = false;

	ainfo.size = sizeof(ainfo);

	pfm_for_each_event_attr(j, info) {
		ret = pfm_get_event_attr_info(info->idx, j,
					      PFM_OS_PERF_EVENT_EXT, &ainfo);
		if (ret != PFM_SUCCESS)
			continue;

		if (ainfo.type != PFM_ATTR_UMASK)
			continue;

		printf("%s::%s:%s\n", pinfo->name, info->name, ainfo.name);
		has_umask = true;
	}
	if (!has_umask)
		printf("%s::%s\n", pinfo->name, info->name);
}

void print_libpfm_events(bool name_only, bool long_desc)
{
	pfm_event_info_t info;
	pfm_pmu_info_t pinfo;
	int i, p, ret;

	libpfm_initialize();

	/* initialize to zero to indicate ABI version */
	info.size  = sizeof(info);
	pinfo.size = sizeof(pinfo);

	if (!name_only)
		puts("\nList of pre-defined events (to be used in --pfm-events):\n");

	pfm_for_all_pmus(p) {
		bool printed_pmu = false;

		ret = pfm_get_pmu_info(p, &pinfo);
		if (ret != PFM_SUCCESS)
			continue;

		/* only print events that are supported by host HW */
		if (!pinfo.is_present)
			continue;

		/* handled by perf directly */
		if (pinfo.pmu == PFM_PMU_PERF_EVENT)
			continue;

		for (i = pinfo.first_event; i != -1;
		     i = pfm_get_event_next(i)) {

			ret = pfm_get_event_info(i, PFM_OS_PERF_EVENT_EXT,
						&info);
			if (ret != PFM_SUCCESS)
				continue;

			if (!name_only && !printed_pmu) {
				printf("%s:\n", pinfo.name);
				printed_pmu = true;
			}

			if (!name_only)
				print_libpfm_events_detailed(&info, long_desc);
			else
				print_libpfm_events_raw(&pinfo, &info);
		}
		if (!name_only && printed_pmu)
			putchar('\n');
	}
}