- 根目录:
- tools
- perf
- util
- pmu.c
#include <linux/list.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdio.h>
#include <dirent.h>
#include "sysfs.h"
#include "util.h"
#include "pmu.h"
#include "parse-events.h"
int perf_pmu_parse(struct list_head *list, char *name);
extern FILE *perf_pmu_in;
static LIST_HEAD(pmus);
static int pmu_format_parse(char *dir, struct list_head *head)
{
struct dirent *evt_ent;
DIR *format_dir;
int ret = 0;
format_dir = opendir(dir);
if (!format_dir)
return -EINVAL;
while (!ret && (evt_ent = readdir(format_dir))) {
char path[PATH_MAX];
char *name = evt_ent->d_name;
FILE *file;
if (!strcmp(name, ".") || !strcmp(name, ".."))
continue;
snprintf(path, PATH_MAX, "%s/%s", dir, name);
ret = -EINVAL;
file = fopen(path, "r");
if (!file)
break;
perf_pmu_in = file;
ret = perf_pmu_parse(head, name);
fclose(file);
}
closedir(format_dir);
return ret;
}
static int pmu_format(char *name, struct list_head *format)
{
struct stat st;
char path[PATH_MAX];
const char *sysfs;
sysfs = sysfs_find_mountpoint();
if (!sysfs)
return -1;
snprintf(path, PATH_MAX,
"%s/bus/event_source/devices/%s/format", sysfs, name);
if (stat(path, &st) < 0)
return -1;
if (pmu_format_parse(path, format))
return -1;
return 0;
}
static int pmu_type(char *name, __u32 *type)
{
struct stat st;
char path[PATH_MAX];
const char *sysfs;
FILE *file;
int ret = 0;
sysfs = sysfs_find_mountpoint();
if (!sysfs)
return -1;
snprintf(path, PATH_MAX,
"%s/bus/event_source/devices/%s/type", sysfs, name);
if (stat(path, &st) < 0)
return -1;
file = fopen(path, "r");
if (!file)
return -EINVAL;
if (1 != fscanf(file, "%u", type))
ret = -1;
fclose(file);
return ret;
}
static struct perf_pmu *pmu_lookup(char *name)
{
struct perf_pmu *pmu;
LIST_HEAD(format);
__u32 type;
if (pmu_format(name, &format))
return NULL;
if (pmu_type(name, &type))
return NULL;
pmu = zalloc(sizeof(*pmu));
if (!pmu)
return NULL;
INIT_LIST_HEAD(&pmu->format);
list_splice(&format, &pmu->format);
pmu->name = strdup(name);
pmu->type = type;
return pmu;
}
static struct perf_pmu *pmu_find(char *name)
{
struct perf_pmu *pmu;
list_for_each_entry(pmu, &pmus, list)
if (!strcmp(pmu->name, name))
return pmu;
return NULL;
}
struct perf_pmu *perf_pmu__find(char *name)
{
struct perf_pmu *pmu;
pmu = pmu_find(name);
if (pmu)
return pmu;
return pmu_lookup(name);
}
static struct perf_pmu__format*
pmu_find_format(struct list_head *formats, char *name)
{
struct perf_pmu__format *format;
list_for_each_entry(format, formats, list)
if (!strcmp(format->name, name))
return format;
return NULL;
}
static __u64 pmu_format_value(unsigned long *format, __u64 value)
{
unsigned long fbit, vbit;
__u64 v = 0;
for (fbit = 0, vbit = 0; fbit < PERF_PMU_FORMAT_BITS; fbit++) {
if (!test_bit(fbit, format))
continue;
if (!(value & (1llu << vbit++)))
continue;
v |= (1llu << fbit);
}
return v;
}
static int pmu_config_term(struct list_head *formats,
struct perf_event_attr *attr,
struct parse_events__term *term)
{
struct perf_pmu__format *format;
__u64 *vp;
if (parse_events__is_hardcoded_term(term))
return 0;
if (term->type != PARSE_EVENTS__TERM_TYPE_NUM)
return -EINVAL;
format = pmu_find_format(formats, term->config);
if (!format)
return -EINVAL;
switch (format->value) {
case PERF_PMU_FORMAT_VALUE_CONFIG:
vp = &attr->config;
break;
case PERF_PMU_FORMAT_VALUE_CONFIG1:
vp = &attr->config1;
break;
case PERF_PMU_FORMAT_VALUE_CONFIG2:
vp = &attr->config2;
break;
default:
return -EINVAL;
}
*vp |= pmu_format_value(format->bits, term->val.num);
return 0;
}
static int pmu_config(struct list_head *formats, struct perf_event_attr *attr,
struct list_head *head_terms)
{
struct parse_events__term *term, *h;
list_for_each_entry_safe(term, h, head_terms, list)
if (pmu_config_term(formats, attr, term))
return -EINVAL;
return 0;
}
int perf_pmu__config(struct perf_pmu *pmu, struct perf_event_attr *attr,
struct list_head *head_terms)
{
attr->type = pmu->type;
return pmu_config(&pmu->format, attr, head_terms);
}
int perf_pmu__new_format(struct list_head *list, char *name,
int config, unsigned long *bits)
{
struct perf_pmu__format *format;
format = zalloc(sizeof(*format));
if (!format)
return -ENOMEM;
format->name = strdup(name);
format->value = config;
memcpy(format->bits, bits, sizeof(format->bits));
list_add_tail(&format->list, list);
return 0;
}
void perf_pmu__set_format(unsigned long *bits, long from, long to)
{
long b;
if (!to)
to = from;
memset(bits, 0, BITS_TO_LONGS(PERF_PMU_FORMAT_BITS));
for (b = from; b <= to; b++)
set_bit(b, bits);
}
static struct test_format {
const char *name;
const char *value;
} test_formats[] = {
{ "krava01", "config:0-1,62-63\n", },
{ "krava02", "config:10-17\n", },
{ "krava03", "config:5\n", },
{ "krava11", "config1:0,2,4,6,8,20-28\n", },
{ "krava12", "config1:63\n", },
{ "krava13", "config1:45-47\n", },
{ "krava21", "config2:0-3,10-13,20-23,30-33,40-43,50-53,60-63\n", },
{ "krava22", "config2:8,18,48,58\n", },
{ "krava23", "config2:28-29,38\n", },
};
#define TEST_FORMATS_CNT (sizeof(test_formats) / sizeof(struct test_format))
static struct parse_events__term test_terms[] = {
{
.config = (char *) "krava01",
.val.num = 15,
.type = PARSE_EVENTS__TERM_TYPE_NUM,
},
{
.config = (char *) "krava02",
.val.num = 170,
.type = PARSE_EVENTS__TERM_TYPE_NUM,
},
{
.config = (char *) "krava03",
.val.num = 1,
.type = PARSE_EVENTS__TERM_TYPE_NUM,
},
{
.config = (char *) "krava11",
.val.num = 27,
.type = PARSE_EVENTS__TERM_TYPE_NUM,
},
{
.config = (char *) "krava12",
.val.num = 1,
.type = PARSE_EVENTS__TERM_TYPE_NUM,
},
{
.config = (char *) "krava13",
.val.num = 2,
.type = PARSE_EVENTS__TERM_TYPE_NUM,
},
{
.config = (char *) "krava21",
.val.num = 119,
.type = PARSE_EVENTS__TERM_TYPE_NUM,
},
{
.config = (char *) "krava22",
.val.num = 11,
.type = PARSE_EVENTS__TERM_TYPE_NUM,
},
{
.config = (char *) "krava23",
.val.num = 2,
.type = PARSE_EVENTS__TERM_TYPE_NUM,
},
};
#define TERMS_CNT (sizeof(test_terms) / sizeof(struct parse_events__term))
static char *test_format_dir_get(void)
{
static char dir[PATH_MAX];
unsigned int i;
snprintf(dir, PATH_MAX, "/tmp/perf-pmu-test-format-XXXXXX");
if (!mkdtemp(dir))
return NULL;
for (i = 0; i < TEST_FORMATS_CNT; i++) {
static char name[PATH_MAX];
struct test_format *format = &test_formats[i];
FILE *file;
snprintf(name, PATH_MAX, "%s/%s", dir, format->name);
file = fopen(name, "w");
if (!file)
return NULL;
if (1 != fwrite(format->value, strlen(format->value), 1, file))
break;
fclose(file);
}
return dir;
}
static int test_format_dir_put(char *dir)
{
char buf[PATH_MAX];
snprintf(buf, PATH_MAX, "rm -f %s/*\n", dir);
if (system(buf))
return -1;
snprintf(buf, PATH_MAX, "rmdir %s\n", dir);
return system(buf);
}
static struct list_head *test_terms_list(void)
{
static LIST_HEAD(terms);
unsigned int i;
for (i = 0; i < TERMS_CNT; i++)
list_add_tail(&test_terms[i].list, &terms);
return &terms;
}
#undef TERMS_CNT
int perf_pmu__test(void)
{
char *format = test_format_dir_get();
LIST_HEAD(formats);
struct list_head *terms = test_terms_list();
int ret;
if (!format)
return -EINVAL;
do {
struct perf_event_attr attr;
memset(&attr, 0, sizeof(attr));
ret = pmu_format_parse(format, &formats);
if (ret)
break;
ret = pmu_config(&formats, &attr, terms);
if (ret)
break;
ret = -EINVAL;
if (attr.config != 0xc00000000002a823)
break;
if (attr.config1 != 0x8000400000000145)
break;
if (attr.config2 != 0x0400000020041d07)
break;
ret = 0;
} while (0);
test_format_dir_put(format);
return ret;
}
- 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
- 291
- 292
- 293
- 294
- 295
- 296
- 297
- 298
- 299
- 300
- 301
- 302
- 303
- 304
- 305
- 306
- 307
- 308
- 309
- 310
- 311
- 312
- 313
- 314
- 315
- 316
- 317
- 318
- 319
- 320
- 321
- 322
- 323
- 324
- 325
- 326
- 327
- 328
- 329
- 330
- 331
- 332
- 333
- 334
- 335
- 336
- 337
- 338
- 339
- 340
- 341
- 342
- 343
- 344
- 345
- 346
- 347
- 348
- 349
- 350
- 351
- 352
- 353
- 354
- 355
- 356
- 357
- 358
- 359
- 360
- 361
- 362
- 363
- 364
- 365
- 366
- 367
- 368
- 369
- 370
- 371
- 372
- 373
- 374
- 375
- 376
- 377
- 378
- 379
- 380
- 381
- 382
- 383
- 384
- 385
- 386
- 387
- 388
- 389
- 390
- 391
- 392
- 393
- 394
- 395
- 396
- 397
- 398
- 399
- 400
- 401
- 402
- 403
- 404
- 405
- 406
- 407
- 408
- 409
- 410
- 411
- 412
- 413
- 414
- 415
- 416
- 417
- 418
- 419
- 420
- 421
- 422
- 423
- 424
- 425
- 426
- 427
- 428
- 429
- 430
- 431
- 432
- 433
- 434
- 435
- 436
- 437
- 438
- 439
- 440
- 441
- 442
- 443
- 444
- 445
- 446
- 447
- 448
- 449
- 450
- 451
- 452
- 453
- 454
- 455
- 456
- 457
- 458
- 459
- 460
- 461
- 462
- 463
- 464
- 465
- 466
- 467
- 468
- 469