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Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
cd0cfad7 | 2 | #include <api/fs/fs.h> |
a12b51c4 PM |
3 | #include "../perf.h" |
4 | #include "cpumap.h" | |
5 | #include <assert.h> | |
76b31a29 | 6 | #include <dirent.h> |
a12b51c4 | 7 | #include <stdio.h> |
86ee6e18 | 8 | #include <stdlib.h> |
f77b57ad | 9 | #include <linux/bitmap.h> |
f30a79b0 | 10 | #include "asm/bug.h" |
a12b51c4 | 11 | |
3052ba56 | 12 | #include <linux/ctype.h> |
7f7c536f | 13 | #include <linux/zalloc.h> |
3d689ed6 | 14 | |
5ac76283 | 15 | static int max_cpu_num; |
92a7e127 | 16 | static int max_present_cpu_num; |
5ac76283 ACM |
17 | static int max_node_num; |
18 | static int *cpunode_map; | |
19 | ||
f854839b | 20 | static struct perf_cpu_map *cpu_map__default_new(void) |
a12b51c4 | 21 | { |
f854839b | 22 | struct perf_cpu_map *cpus; |
60d567e2 | 23 | int nr_cpus; |
a12b51c4 PM |
24 | |
25 | nr_cpus = sysconf(_SC_NPROCESSORS_ONLN); | |
60d567e2 ACM |
26 | if (nr_cpus < 0) |
27 | return NULL; | |
28 | ||
29 | cpus = malloc(sizeof(*cpus) + nr_cpus * sizeof(int)); | |
30 | if (cpus != NULL) { | |
31 | int i; | |
32 | for (i = 0; i < nr_cpus; ++i) | |
33 | cpus->map[i] = i; | |
a12b51c4 | 34 | |
60d567e2 | 35 | cpus->nr = nr_cpus; |
ec09a42a | 36 | refcount_set(&cpus->refcnt, 1); |
60d567e2 | 37 | } |
a12b51c4 | 38 | |
60d567e2 | 39 | return cpus; |
a12b51c4 PM |
40 | } |
41 | ||
f854839b | 42 | static struct perf_cpu_map *cpu_map__trim_new(int nr_cpus, int *tmp_cpus) |
a12b51c4 | 43 | { |
60d567e2 | 44 | size_t payload_size = nr_cpus * sizeof(int); |
f854839b | 45 | struct perf_cpu_map *cpus = malloc(sizeof(*cpus) + payload_size); |
60d567e2 ACM |
46 | |
47 | if (cpus != NULL) { | |
48 | cpus->nr = nr_cpus; | |
49 | memcpy(cpus->map, tmp_cpus, payload_size); | |
ec09a42a | 50 | refcount_set(&cpus->refcnt, 1); |
60d567e2 ACM |
51 | } |
52 | ||
53 | return cpus; | |
54 | } | |
55 | ||
f854839b | 56 | struct perf_cpu_map *cpu_map__read(FILE *file) |
60d567e2 | 57 | { |
f854839b | 58 | struct perf_cpu_map *cpus = NULL; |
a12b51c4 | 59 | int nr_cpus = 0; |
60d567e2 ACM |
60 | int *tmp_cpus = NULL, *tmp; |
61 | int max_entries = 0; | |
a12b51c4 PM |
62 | int n, cpu, prev; |
63 | char sep; | |
64 | ||
a12b51c4 PM |
65 | sep = 0; |
66 | prev = -1; | |
67 | for (;;) { | |
7ae92e74 | 68 | n = fscanf(file, "%u%c", &cpu, &sep); |
a12b51c4 PM |
69 | if (n <= 0) |
70 | break; | |
71 | if (prev >= 0) { | |
60d567e2 ACM |
72 | int new_max = nr_cpus + cpu - prev - 1; |
73 | ||
74 | if (new_max >= max_entries) { | |
75 | max_entries = new_max + MAX_NR_CPUS / 2; | |
76 | tmp = realloc(tmp_cpus, max_entries * sizeof(int)); | |
77 | if (tmp == NULL) | |
78 | goto out_free_tmp; | |
79 | tmp_cpus = tmp; | |
80 | } | |
81 | ||
a12b51c4 | 82 | while (++prev < cpu) |
60d567e2 ACM |
83 | tmp_cpus[nr_cpus++] = prev; |
84 | } | |
85 | if (nr_cpus == max_entries) { | |
86 | max_entries += MAX_NR_CPUS; | |
87 | tmp = realloc(tmp_cpus, max_entries * sizeof(int)); | |
88 | if (tmp == NULL) | |
89 | goto out_free_tmp; | |
90 | tmp_cpus = tmp; | |
a12b51c4 | 91 | } |
60d567e2 ACM |
92 | |
93 | tmp_cpus[nr_cpus++] = cpu; | |
a12b51c4 PM |
94 | if (n == 2 && sep == '-') |
95 | prev = cpu; | |
96 | else | |
97 | prev = -1; | |
98 | if (n == 1 || sep == '\n') | |
99 | break; | |
100 | } | |
a12b51c4 | 101 | |
60d567e2 ACM |
102 | if (nr_cpus > 0) |
103 | cpus = cpu_map__trim_new(nr_cpus, tmp_cpus); | |
104 | else | |
105 | cpus = cpu_map__default_new(); | |
106 | out_free_tmp: | |
107 | free(tmp_cpus); | |
7ae92e74 YZ |
108 | return cpus; |
109 | } | |
110 | ||
f854839b | 111 | static struct perf_cpu_map *cpu_map__read_all_cpu_map(void) |
7ae92e74 | 112 | { |
f854839b | 113 | struct perf_cpu_map *cpus = NULL; |
7ae92e74 YZ |
114 | FILE *onlnf; |
115 | ||
116 | onlnf = fopen("/sys/devices/system/cpu/online", "r"); | |
117 | if (!onlnf) | |
118 | return cpu_map__default_new(); | |
119 | ||
120 | cpus = cpu_map__read(onlnf); | |
60d567e2 ACM |
121 | fclose(onlnf); |
122 | return cpus; | |
a12b51c4 | 123 | } |
c45c6ea2 | 124 | |
f854839b | 125 | struct perf_cpu_map *cpu_map__new(const char *cpu_list) |
c45c6ea2 | 126 | { |
f854839b | 127 | struct perf_cpu_map *cpus = NULL; |
c45c6ea2 SE |
128 | unsigned long start_cpu, end_cpu = 0; |
129 | char *p = NULL; | |
130 | int i, nr_cpus = 0; | |
60d567e2 ACM |
131 | int *tmp_cpus = NULL, *tmp; |
132 | int max_entries = 0; | |
c45c6ea2 SE |
133 | |
134 | if (!cpu_list) | |
60d567e2 | 135 | return cpu_map__read_all_cpu_map(); |
c45c6ea2 | 136 | |
1497e804 SE |
137 | /* |
138 | * must handle the case of empty cpumap to cover | |
139 | * TOPOLOGY header for NUMA nodes with no CPU | |
140 | * ( e.g., because of CPU hotplug) | |
141 | */ | |
142 | if (!isdigit(*cpu_list) && *cpu_list != '\0') | |
60d567e2 | 143 | goto out; |
c45c6ea2 SE |
144 | |
145 | while (isdigit(*cpu_list)) { | |
146 | p = NULL; | |
147 | start_cpu = strtoul(cpu_list, &p, 0); | |
148 | if (start_cpu >= INT_MAX | |
149 | || (*p != '\0' && *p != ',' && *p != '-')) | |
150 | goto invalid; | |
151 | ||
152 | if (*p == '-') { | |
153 | cpu_list = ++p; | |
154 | p = NULL; | |
155 | end_cpu = strtoul(cpu_list, &p, 0); | |
156 | ||
157 | if (end_cpu >= INT_MAX || (*p != '\0' && *p != ',')) | |
158 | goto invalid; | |
159 | ||
160 | if (end_cpu < start_cpu) | |
161 | goto invalid; | |
162 | } else { | |
163 | end_cpu = start_cpu; | |
164 | } | |
165 | ||
166 | for (; start_cpu <= end_cpu; start_cpu++) { | |
167 | /* check for duplicates */ | |
168 | for (i = 0; i < nr_cpus; i++) | |
60d567e2 | 169 | if (tmp_cpus[i] == (int)start_cpu) |
c45c6ea2 SE |
170 | goto invalid; |
171 | ||
60d567e2 ACM |
172 | if (nr_cpus == max_entries) { |
173 | max_entries += MAX_NR_CPUS; | |
174 | tmp = realloc(tmp_cpus, max_entries * sizeof(int)); | |
175 | if (tmp == NULL) | |
176 | goto invalid; | |
177 | tmp_cpus = tmp; | |
178 | } | |
179 | tmp_cpus[nr_cpus++] = (int)start_cpu; | |
c45c6ea2 SE |
180 | } |
181 | if (*p) | |
182 | ++p; | |
183 | ||
184 | cpu_list = p; | |
185 | } | |
c45c6ea2 | 186 | |
60d567e2 ACM |
187 | if (nr_cpus > 0) |
188 | cpus = cpu_map__trim_new(nr_cpus, tmp_cpus); | |
1497e804 | 189 | else if (*cpu_list != '\0') |
60d567e2 | 190 | cpus = cpu_map__default_new(); |
1497e804 | 191 | else |
397721e0 | 192 | cpus = perf_cpu_map__dummy_new(); |
c45c6ea2 | 193 | invalid: |
60d567e2 ACM |
194 | free(tmp_cpus); |
195 | out: | |
196 | return cpus; | |
197 | } | |
198 | ||
f854839b | 199 | static struct perf_cpu_map *cpu_map__from_entries(struct cpu_map_entries *cpus) |
f77b57ad | 200 | { |
f854839b | 201 | struct perf_cpu_map *map; |
f77b57ad JO |
202 | |
203 | map = cpu_map__empty_new(cpus->nr); | |
204 | if (map) { | |
205 | unsigned i; | |
206 | ||
15d2b995 JO |
207 | for (i = 0; i < cpus->nr; i++) { |
208 | /* | |
209 | * Special treatment for -1, which is not real cpu number, | |
210 | * and we need to use (int) -1 to initialize map[i], | |
211 | * otherwise it would become 65535. | |
212 | */ | |
213 | if (cpus->cpu[i] == (u16) -1) | |
214 | map->map[i] = -1; | |
215 | else | |
216 | map->map[i] = (int) cpus->cpu[i]; | |
217 | } | |
f77b57ad JO |
218 | } |
219 | ||
220 | return map; | |
221 | } | |
222 | ||
f854839b | 223 | static struct perf_cpu_map *cpu_map__from_mask(struct cpu_map_mask *mask) |
f77b57ad | 224 | { |
f854839b | 225 | struct perf_cpu_map *map; |
f77b57ad JO |
226 | int nr, nbits = mask->nr * mask->long_size * BITS_PER_BYTE; |
227 | ||
228 | nr = bitmap_weight(mask->mask, nbits); | |
229 | ||
230 | map = cpu_map__empty_new(nr); | |
231 | if (map) { | |
232 | int cpu, i = 0; | |
233 | ||
234 | for_each_set_bit(cpu, mask->mask, nbits) | |
235 | map->map[i++] = cpu; | |
236 | } | |
237 | return map; | |
238 | ||
239 | } | |
240 | ||
f854839b | 241 | struct perf_cpu_map *cpu_map__new_data(struct cpu_map_data *data) |
f77b57ad JO |
242 | { |
243 | if (data->type == PERF_CPU_MAP__CPUS) | |
244 | return cpu_map__from_entries((struct cpu_map_entries *)data->data); | |
245 | else | |
246 | return cpu_map__from_mask((struct cpu_map_mask *)data->data); | |
247 | } | |
248 | ||
f854839b | 249 | size_t cpu_map__fprintf(struct perf_cpu_map *map, FILE *fp) |
9ae7d335 | 250 | { |
a24020e6 JO |
251 | #define BUFSIZE 1024 |
252 | char buf[BUFSIZE]; | |
9ae7d335 | 253 | |
a24020e6 JO |
254 | cpu_map__snprint(map, buf, sizeof(buf)); |
255 | return fprintf(fp, "%s\n", buf); | |
256 | #undef BUFSIZE | |
9ae7d335 ACM |
257 | } |
258 | ||
f854839b | 259 | struct perf_cpu_map *cpu_map__empty_new(int nr) |
2322f573 | 260 | { |
f854839b | 261 | struct perf_cpu_map *cpus = malloc(sizeof(*cpus) + sizeof(int) * nr); |
2322f573 JO |
262 | |
263 | if (cpus != NULL) { | |
264 | int i; | |
265 | ||
266 | cpus->nr = nr; | |
267 | for (i = 0; i < nr; i++) | |
268 | cpus->map[i] = -1; | |
269 | ||
ec09a42a | 270 | refcount_set(&cpus->refcnt, 1); |
2322f573 JO |
271 | } |
272 | ||
273 | return cpus; | |
274 | } | |
275 | ||
5d8cf721 | 276 | static int cpu__get_topology_int(int cpu, const char *name, int *value) |
5ac59a8a | 277 | { |
5ac59a8a | 278 | char path[PATH_MAX]; |
5ac59a8a | 279 | |
86ee6e18 | 280 | snprintf(path, PATH_MAX, |
5d8cf721 | 281 | "devices/system/cpu/cpu%d/topology/%s", cpu, name); |
5ac59a8a | 282 | |
5d8cf721 ACM |
283 | return sysfs__read_int(path, value); |
284 | } | |
193b6bd3 | 285 | |
5d8cf721 ACM |
286 | int cpu_map__get_socket_id(int cpu) |
287 | { | |
288 | int value, ret = cpu__get_topology_int(cpu, "physical_package_id", &value); | |
289 | return ret ?: value; | |
193b6bd3 KL |
290 | } |
291 | ||
f854839b | 292 | int cpu_map__get_socket(struct perf_cpu_map *map, int idx, void *data __maybe_unused) |
193b6bd3 KL |
293 | { |
294 | int cpu; | |
295 | ||
296 | if (idx > map->nr) | |
297 | return -1; | |
298 | ||
299 | cpu = map->map[idx]; | |
300 | ||
301 | return cpu_map__get_socket_id(cpu); | |
5ac59a8a SE |
302 | } |
303 | ||
86ee6e18 | 304 | static int cmp_ids(const void *a, const void *b) |
5ac59a8a | 305 | { |
86ee6e18 SE |
306 | return *(int *)a - *(int *)b; |
307 | } | |
308 | ||
f854839b JO |
309 | int cpu_map__build_map(struct perf_cpu_map *cpus, struct perf_cpu_map **res, |
310 | int (*f)(struct perf_cpu_map *map, int cpu, void *data), | |
1fe7a300 | 311 | void *data) |
86ee6e18 | 312 | { |
f854839b | 313 | struct perf_cpu_map *c; |
5ac59a8a SE |
314 | int nr = cpus->nr; |
315 | int cpu, s1, s2; | |
316 | ||
86ee6e18 SE |
317 | /* allocate as much as possible */ |
318 | c = calloc(1, sizeof(*c) + nr * sizeof(int)); | |
319 | if (!c) | |
5ac59a8a SE |
320 | return -1; |
321 | ||
322 | for (cpu = 0; cpu < nr; cpu++) { | |
1fe7a300 | 323 | s1 = f(cpus, cpu, data); |
86ee6e18 SE |
324 | for (s2 = 0; s2 < c->nr; s2++) { |
325 | if (s1 == c->map[s2]) | |
5ac59a8a SE |
326 | break; |
327 | } | |
86ee6e18 SE |
328 | if (s2 == c->nr) { |
329 | c->map[c->nr] = s1; | |
330 | c->nr++; | |
5ac59a8a SE |
331 | } |
332 | } | |
86ee6e18 SE |
333 | /* ensure we process id in increasing order */ |
334 | qsort(c->map, c->nr, sizeof(int), cmp_ids); | |
335 | ||
ec09a42a | 336 | refcount_set(&c->refcnt, 1); |
86ee6e18 | 337 | *res = c; |
5ac59a8a SE |
338 | return 0; |
339 | } | |
86ee6e18 | 340 | |
b74d8686 KL |
341 | int cpu_map__get_die_id(int cpu) |
342 | { | |
343 | int value, ret = cpu__get_topology_int(cpu, "die_id", &value); | |
344 | ||
345 | return ret ?: value; | |
346 | } | |
347 | ||
f854839b | 348 | int cpu_map__get_die(struct perf_cpu_map *map, int idx, void *data) |
db5742b6 KL |
349 | { |
350 | int cpu, die_id, s; | |
351 | ||
352 | if (idx > map->nr) | |
353 | return -1; | |
354 | ||
355 | cpu = map->map[idx]; | |
356 | ||
357 | die_id = cpu_map__get_die_id(cpu); | |
358 | /* There is no die_id on legacy system. */ | |
359 | if (die_id == -1) | |
360 | die_id = 0; | |
361 | ||
362 | s = cpu_map__get_socket(map, idx, data); | |
363 | if (s == -1) | |
364 | return -1; | |
365 | ||
366 | /* | |
367 | * Encode socket in bit range 15:8 | |
368 | * die_id is relative to socket, and | |
369 | * we need a global id. So we combine | |
370 | * socket + die id | |
371 | */ | |
372 | if (WARN_ONCE(die_id >> 8, "The die id number is too big.\n")) | |
373 | return -1; | |
374 | ||
375 | if (WARN_ONCE(s >> 8, "The socket id number is too big.\n")) | |
376 | return -1; | |
377 | ||
378 | return (s << 8) | (die_id & 0xff); | |
379 | } | |
380 | ||
193b6bd3 | 381 | int cpu_map__get_core_id(int cpu) |
12c08a9f | 382 | { |
5d8cf721 ACM |
383 | int value, ret = cpu__get_topology_int(cpu, "core_id", &value); |
384 | return ret ?: value; | |
193b6bd3 KL |
385 | } |
386 | ||
f854839b | 387 | int cpu_map__get_core(struct perf_cpu_map *map, int idx, void *data) |
193b6bd3 | 388 | { |
db5742b6 | 389 | int cpu, s_die; |
193b6bd3 KL |
390 | |
391 | if (idx > map->nr) | |
12c08a9f SE |
392 | return -1; |
393 | ||
193b6bd3 KL |
394 | cpu = map->map[idx]; |
395 | ||
396 | cpu = cpu_map__get_core_id(cpu); | |
397 | ||
db5742b6 KL |
398 | /* s_die is the combination of socket + die id */ |
399 | s_die = cpu_map__get_die(map, idx, data); | |
400 | if (s_die == -1) | |
12c08a9f SE |
401 | return -1; |
402 | ||
403 | /* | |
db5742b6 KL |
404 | * encode socket in bit range 31:24 |
405 | * encode die id in bit range 23:16 | |
406 | * core_id is relative to socket and die, | |
12c08a9f | 407 | * we need a global id. So we combine |
db5742b6 | 408 | * socket + die id + core id |
12c08a9f | 409 | */ |
db5742b6 KL |
410 | if (WARN_ONCE(cpu >> 16, "The core id number is too big.\n")) |
411 | return -1; | |
412 | ||
413 | return (s_die << 16) | (cpu & 0xffff); | |
12c08a9f SE |
414 | } |
415 | ||
f854839b | 416 | int cpu_map__build_socket_map(struct perf_cpu_map *cpus, struct perf_cpu_map **sockp) |
86ee6e18 | 417 | { |
1fe7a300 | 418 | return cpu_map__build_map(cpus, sockp, cpu_map__get_socket, NULL); |
86ee6e18 | 419 | } |
12c08a9f | 420 | |
f854839b | 421 | int cpu_map__build_die_map(struct perf_cpu_map *cpus, struct perf_cpu_map **diep) |
db5742b6 KL |
422 | { |
423 | return cpu_map__build_map(cpus, diep, cpu_map__get_die, NULL); | |
424 | } | |
425 | ||
f854839b | 426 | int cpu_map__build_core_map(struct perf_cpu_map *cpus, struct perf_cpu_map **corep) |
12c08a9f | 427 | { |
1fe7a300 | 428 | return cpu_map__build_map(cpus, corep, cpu_map__get_core, NULL); |
12c08a9f | 429 | } |
7780c25b DZ |
430 | |
431 | /* setup simple routines to easily access node numbers given a cpu number */ | |
432 | static int get_max_num(char *path, int *max) | |
433 | { | |
434 | size_t num; | |
435 | char *buf; | |
436 | int err = 0; | |
437 | ||
438 | if (filename__read_str(path, &buf, &num)) | |
439 | return -1; | |
440 | ||
441 | buf[num] = '\0'; | |
442 | ||
443 | /* start on the right, to find highest node num */ | |
444 | while (--num) { | |
445 | if ((buf[num] == ',') || (buf[num] == '-')) { | |
446 | num++; | |
447 | break; | |
448 | } | |
449 | } | |
450 | if (sscanf(&buf[num], "%d", max) < 1) { | |
451 | err = -1; | |
452 | goto out; | |
453 | } | |
454 | ||
455 | /* convert from 0-based to 1-based */ | |
456 | (*max)++; | |
457 | ||
458 | out: | |
459 | free(buf); | |
460 | return err; | |
461 | } | |
462 | ||
463 | /* Determine highest possible cpu in the system for sparse allocation */ | |
464 | static void set_max_cpu_num(void) | |
465 | { | |
466 | const char *mnt; | |
467 | char path[PATH_MAX]; | |
468 | int ret = -1; | |
469 | ||
470 | /* set up default */ | |
471 | max_cpu_num = 4096; | |
92a7e127 | 472 | max_present_cpu_num = 4096; |
7780c25b DZ |
473 | |
474 | mnt = sysfs__mountpoint(); | |
475 | if (!mnt) | |
476 | goto out; | |
477 | ||
478 | /* get the highest possible cpu number for a sparse allocation */ | |
f5b1f4e4 | 479 | ret = snprintf(path, PATH_MAX, "%s/devices/system/cpu/possible", mnt); |
7780c25b DZ |
480 | if (ret == PATH_MAX) { |
481 | pr_err("sysfs path crossed PATH_MAX(%d) size\n", PATH_MAX); | |
482 | goto out; | |
483 | } | |
484 | ||
485 | ret = get_max_num(path, &max_cpu_num); | |
92a7e127 JS |
486 | if (ret) |
487 | goto out; | |
488 | ||
489 | /* get the highest present cpu number for a sparse allocation */ | |
490 | ret = snprintf(path, PATH_MAX, "%s/devices/system/cpu/present", mnt); | |
491 | if (ret == PATH_MAX) { | |
492 | pr_err("sysfs path crossed PATH_MAX(%d) size\n", PATH_MAX); | |
493 | goto out; | |
494 | } | |
495 | ||
496 | ret = get_max_num(path, &max_present_cpu_num); | |
7780c25b DZ |
497 | |
498 | out: | |
499 | if (ret) | |
500 | pr_err("Failed to read max cpus, using default of %d\n", max_cpu_num); | |
501 | } | |
502 | ||
503 | /* Determine highest possible node in the system for sparse allocation */ | |
504 | static void set_max_node_num(void) | |
505 | { | |
506 | const char *mnt; | |
507 | char path[PATH_MAX]; | |
508 | int ret = -1; | |
509 | ||
510 | /* set up default */ | |
511 | max_node_num = 8; | |
512 | ||
513 | mnt = sysfs__mountpoint(); | |
514 | if (!mnt) | |
515 | goto out; | |
516 | ||
517 | /* get the highest possible cpu number for a sparse allocation */ | |
518 | ret = snprintf(path, PATH_MAX, "%s/devices/system/node/possible", mnt); | |
519 | if (ret == PATH_MAX) { | |
520 | pr_err("sysfs path crossed PATH_MAX(%d) size\n", PATH_MAX); | |
521 | goto out; | |
522 | } | |
523 | ||
524 | ret = get_max_num(path, &max_node_num); | |
525 | ||
526 | out: | |
527 | if (ret) | |
528 | pr_err("Failed to read max nodes, using default of %d\n", max_node_num); | |
529 | } | |
530 | ||
5ac76283 ACM |
531 | int cpu__max_node(void) |
532 | { | |
533 | if (unlikely(!max_node_num)) | |
534 | set_max_node_num(); | |
535 | ||
536 | return max_node_num; | |
537 | } | |
538 | ||
539 | int cpu__max_cpu(void) | |
540 | { | |
541 | if (unlikely(!max_cpu_num)) | |
542 | set_max_cpu_num(); | |
543 | ||
544 | return max_cpu_num; | |
545 | } | |
546 | ||
92a7e127 JS |
547 | int cpu__max_present_cpu(void) |
548 | { | |
549 | if (unlikely(!max_present_cpu_num)) | |
550 | set_max_cpu_num(); | |
551 | ||
552 | return max_present_cpu_num; | |
553 | } | |
554 | ||
555 | ||
5ac76283 ACM |
556 | int cpu__get_node(int cpu) |
557 | { | |
558 | if (unlikely(cpunode_map == NULL)) { | |
559 | pr_debug("cpu_map not initialized\n"); | |
560 | return -1; | |
561 | } | |
562 | ||
563 | return cpunode_map[cpu]; | |
564 | } | |
565 | ||
7780c25b DZ |
566 | static int init_cpunode_map(void) |
567 | { | |
568 | int i; | |
569 | ||
570 | set_max_cpu_num(); | |
571 | set_max_node_num(); | |
572 | ||
573 | cpunode_map = calloc(max_cpu_num, sizeof(int)); | |
574 | if (!cpunode_map) { | |
575 | pr_err("%s: calloc failed\n", __func__); | |
576 | return -1; | |
577 | } | |
578 | ||
579 | for (i = 0; i < max_cpu_num; i++) | |
580 | cpunode_map[i] = -1; | |
581 | ||
582 | return 0; | |
583 | } | |
584 | ||
585 | int cpu__setup_cpunode_map(void) | |
586 | { | |
587 | struct dirent *dent1, *dent2; | |
588 | DIR *dir1, *dir2; | |
589 | unsigned int cpu, mem; | |
590 | char buf[PATH_MAX]; | |
591 | char path[PATH_MAX]; | |
592 | const char *mnt; | |
593 | int n; | |
594 | ||
595 | /* initialize globals */ | |
596 | if (init_cpunode_map()) | |
597 | return -1; | |
598 | ||
599 | mnt = sysfs__mountpoint(); | |
600 | if (!mnt) | |
601 | return 0; | |
602 | ||
603 | n = snprintf(path, PATH_MAX, "%s/devices/system/node", mnt); | |
604 | if (n == PATH_MAX) { | |
605 | pr_err("sysfs path crossed PATH_MAX(%d) size\n", PATH_MAX); | |
606 | return -1; | |
607 | } | |
608 | ||
609 | dir1 = opendir(path); | |
610 | if (!dir1) | |
611 | return 0; | |
612 | ||
613 | /* walk tree and setup map */ | |
614 | while ((dent1 = readdir(dir1)) != NULL) { | |
615 | if (dent1->d_type != DT_DIR || sscanf(dent1->d_name, "node%u", &mem) < 1) | |
616 | continue; | |
617 | ||
618 | n = snprintf(buf, PATH_MAX, "%s/%s", path, dent1->d_name); | |
619 | if (n == PATH_MAX) { | |
620 | pr_err("sysfs path crossed PATH_MAX(%d) size\n", PATH_MAX); | |
621 | continue; | |
622 | } | |
623 | ||
624 | dir2 = opendir(buf); | |
625 | if (!dir2) | |
626 | continue; | |
627 | while ((dent2 = readdir(dir2)) != NULL) { | |
628 | if (dent2->d_type != DT_LNK || sscanf(dent2->d_name, "cpu%u", &cpu) < 1) | |
629 | continue; | |
630 | cpunode_map[cpu] = mem; | |
631 | } | |
632 | closedir(dir2); | |
633 | } | |
634 | closedir(dir1); | |
635 | return 0; | |
636 | } | |
e632aa69 | 637 | |
f854839b | 638 | bool cpu_map__has(struct perf_cpu_map *cpus, int cpu) |
9a6c582d MR |
639 | { |
640 | return cpu_map__idx(cpus, cpu) != -1; | |
641 | } | |
642 | ||
f854839b | 643 | int cpu_map__idx(struct perf_cpu_map *cpus, int cpu) |
e632aa69 JO |
644 | { |
645 | int i; | |
646 | ||
647 | for (i = 0; i < cpus->nr; ++i) { | |
648 | if (cpus->map[i] == cpu) | |
9a6c582d | 649 | return i; |
e632aa69 JO |
650 | } |
651 | ||
9a6c582d MR |
652 | return -1; |
653 | } | |
654 | ||
f854839b | 655 | int cpu_map__cpu(struct perf_cpu_map *cpus, int idx) |
9a6c582d MR |
656 | { |
657 | return cpus->map[idx]; | |
e632aa69 | 658 | } |
a24020e6 | 659 | |
f854839b | 660 | size_t cpu_map__snprint(struct perf_cpu_map *map, char *buf, size_t size) |
a24020e6 JO |
661 | { |
662 | int i, cpu, start = -1; | |
663 | bool first = true; | |
664 | size_t ret = 0; | |
665 | ||
666 | #define COMMA first ? "" : "," | |
667 | ||
668 | for (i = 0; i < map->nr + 1; i++) { | |
669 | bool last = i == map->nr; | |
670 | ||
671 | cpu = last ? INT_MAX : map->map[i]; | |
672 | ||
673 | if (start == -1) { | |
674 | start = i; | |
675 | if (last) { | |
676 | ret += snprintf(buf + ret, size - ret, | |
677 | "%s%d", COMMA, | |
678 | map->map[i]); | |
679 | } | |
680 | } else if (((i - start) != (cpu - map->map[start])) || last) { | |
681 | int end = i - 1; | |
682 | ||
683 | if (start == end) { | |
684 | ret += snprintf(buf + ret, size - ret, | |
685 | "%s%d", COMMA, | |
686 | map->map[start]); | |
687 | } else { | |
688 | ret += snprintf(buf + ret, size - ret, | |
689 | "%s%d-%d", COMMA, | |
690 | map->map[start], map->map[end]); | |
691 | } | |
692 | first = false; | |
693 | start = i; | |
694 | } | |
695 | } | |
696 | ||
697 | #undef COMMA | |
698 | ||
deb83da1 | 699 | pr_debug2("cpumask list: %s\n", buf); |
a24020e6 JO |
700 | return ret; |
701 | } | |
4400ac8a NK |
702 | |
703 | static char hex_char(unsigned char val) | |
704 | { | |
705 | if (val < 10) | |
706 | return val + '0'; | |
707 | if (val < 16) | |
708 | return val - 10 + 'a'; | |
709 | return '?'; | |
710 | } | |
711 | ||
f854839b | 712 | size_t cpu_map__snprint_mask(struct perf_cpu_map *map, char *buf, size_t size) |
4400ac8a NK |
713 | { |
714 | int i, cpu; | |
715 | char *ptr = buf; | |
716 | unsigned char *bitmap; | |
717 | int last_cpu = cpu_map__cpu(map, map->nr - 1); | |
718 | ||
719 | bitmap = zalloc((last_cpu + 7) / 8); | |
720 | if (bitmap == NULL) { | |
721 | buf[0] = '\0'; | |
722 | return 0; | |
723 | } | |
724 | ||
725 | for (i = 0; i < map->nr; i++) { | |
726 | cpu = cpu_map__cpu(map, i); | |
727 | bitmap[cpu / 8] |= 1 << (cpu % 8); | |
728 | } | |
729 | ||
730 | for (cpu = last_cpu / 4 * 4; cpu >= 0; cpu -= 4) { | |
731 | unsigned char bits = bitmap[cpu / 8]; | |
732 | ||
733 | if (cpu % 8) | |
734 | bits >>= 4; | |
735 | else | |
736 | bits &= 0xf; | |
737 | ||
738 | *ptr++ = hex_char(bits); | |
739 | if ((cpu % 32) == 0 && cpu > 0) | |
740 | *ptr++ = ','; | |
741 | } | |
742 | *ptr = '\0'; | |
743 | free(bitmap); | |
744 | ||
745 | buf[size - 1] = '\0'; | |
746 | return ptr - buf; | |
747 | } | |
f13de660 | 748 | |
f854839b | 749 | const struct perf_cpu_map *cpu_map__online(void) /* thread unsafe */ |
f13de660 | 750 | { |
f854839b | 751 | static const struct perf_cpu_map *online = NULL; |
f13de660 AB |
752 | |
753 | if (!online) | |
754 | online = cpu_map__new(NULL); /* from /sys/devices/system/cpu/online */ | |
755 | ||
756 | return online; | |
757 | } |