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ebabbf58 MD |
1 | /* SPDX-License-Identifier: (GPL-2.0-only OR LGPL-2.1-only) |
2 | * | |
3 | * counter.c | |
4 | * | |
5 | * Copyright (C) 2020 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
6 | */ | |
7 | ||
ebabbf58 MD |
8 | #include <errno.h> |
9 | #include "counter.h" | |
10 | #include "counter-internal.h" | |
ebabbf58 MD |
11 | #include <urcu/system.h> |
12 | #include <urcu/compiler.h> | |
13 | #include <stdbool.h> | |
864a1eda | 14 | #include <ust-helper.h> |
ebabbf58 MD |
15 | #include "smp.h" |
16 | #include "shm.h" | |
cd61d9bf | 17 | #include "ust-compat.h" |
ebabbf58 | 18 | |
b7b5cf30 MJ |
19 | #include "ust-bitmap.h" |
20 | ||
ebabbf58 MD |
21 | static size_t lttng_counter_get_dimension_nr_elements(struct lib_counter_dimension *dimension) |
22 | { | |
23 | return dimension->max_nr_elem; | |
24 | } | |
25 | ||
2208d8b5 MJ |
26 | static int lttng_counter_init_stride( |
27 | const struct lib_counter_config *config __attribute__((unused)), | |
28 | struct lib_counter *counter) | |
ebabbf58 MD |
29 | { |
30 | size_t nr_dimensions = counter->nr_dimensions; | |
31 | size_t stride = 1; | |
32 | ssize_t i; | |
33 | ||
34 | for (i = nr_dimensions - 1; i >= 0; i--) { | |
35 | struct lib_counter_dimension *dimension = &counter->dimensions[i]; | |
36 | size_t nr_elem; | |
37 | ||
38 | nr_elem = lttng_counter_get_dimension_nr_elements(dimension); | |
39 | dimension->stride = stride; | |
40 | /* nr_elem should be minimum 1 for each dimension. */ | |
41 | if (!nr_elem) | |
42 | return -EINVAL; | |
43 | stride *= nr_elem; | |
44 | if (stride > SIZE_MAX / nr_elem) | |
45 | return -EINVAL; | |
46 | } | |
47 | return 0; | |
48 | } | |
49 | ||
50 | static int lttng_counter_layout_init(struct lib_counter *counter, int cpu, int shm_fd) | |
51 | { | |
52 | struct lib_counter_layout *layout; | |
53 | size_t counter_size; | |
54 | size_t nr_elem = counter->allocated_elem; | |
55 | size_t shm_length = 0, counters_offset, overflow_offset, underflow_offset; | |
56 | struct lttng_counter_shm_object *shm_object; | |
57 | ||
58 | if (shm_fd < 0) | |
59 | return 0; /* Skip, will be populated later. */ | |
60 | ||
61 | if (cpu == -1) | |
62 | layout = &counter->global_counters; | |
63 | else | |
64 | layout = &counter->percpu_counters[cpu]; | |
65 | switch (counter->config.counter_size) { | |
66 | case COUNTER_SIZE_8_BIT: | |
67 | case COUNTER_SIZE_16_BIT: | |
68 | case COUNTER_SIZE_32_BIT: | |
69 | case COUNTER_SIZE_64_BIT: | |
70 | counter_size = (size_t) counter->config.counter_size; | |
71 | break; | |
72 | default: | |
73 | return -EINVAL; | |
74 | } | |
75 | layout->shm_fd = shm_fd; | |
76 | counters_offset = shm_length; | |
77 | shm_length += counter_size * nr_elem; | |
78 | overflow_offset = shm_length; | |
00adec46 | 79 | shm_length += LTTNG_UST_ALIGN(nr_elem, 8) / 8; |
ebabbf58 | 80 | underflow_offset = shm_length; |
00adec46 | 81 | shm_length += LTTNG_UST_ALIGN(nr_elem, 8) / 8; |
ebabbf58 MD |
82 | layout->shm_len = shm_length; |
83 | if (counter->is_daemon) { | |
84 | /* Allocate and clear shared memory. */ | |
85 | shm_object = lttng_counter_shm_object_table_alloc(counter->object_table, | |
86 | shm_length, LTTNG_COUNTER_SHM_OBJECT_SHM, shm_fd, cpu); | |
87 | if (!shm_object) | |
88 | return -ENOMEM; | |
89 | } else { | |
90 | /* Map pre-existing shared memory. */ | |
91 | shm_object = lttng_counter_shm_object_table_append_shm(counter->object_table, | |
92 | shm_fd, shm_length); | |
93 | if (!shm_object) | |
94 | return -ENOMEM; | |
95 | } | |
96 | layout->counters = shm_object->memory_map + counters_offset; | |
97 | layout->overflow_bitmap = (unsigned long *)(shm_object->memory_map + overflow_offset); | |
98 | layout->underflow_bitmap = (unsigned long *)(shm_object->memory_map + underflow_offset); | |
99 | return 0; | |
100 | } | |
101 | ||
102 | int lttng_counter_set_global_shm(struct lib_counter *counter, int fd) | |
103 | { | |
104 | struct lib_counter_config *config = &counter->config; | |
105 | struct lib_counter_layout *layout; | |
106 | ||
107 | if (!(config->alloc & COUNTER_ALLOC_GLOBAL)) | |
108 | return -EINVAL; | |
109 | layout = &counter->global_counters; | |
110 | if (layout->shm_fd >= 0) | |
111 | return -EBUSY; | |
112 | return lttng_counter_layout_init(counter, -1, fd); | |
113 | } | |
114 | ||
115 | int lttng_counter_set_cpu_shm(struct lib_counter *counter, int cpu, int fd) | |
116 | { | |
117 | struct lib_counter_config *config = &counter->config; | |
118 | struct lib_counter_layout *layout; | |
119 | ||
120 | if (cpu < 0 || cpu >= lttng_counter_num_possible_cpus()) | |
121 | return -EINVAL; | |
122 | ||
123 | if (!(config->alloc & COUNTER_ALLOC_PER_CPU)) | |
124 | return -EINVAL; | |
125 | layout = &counter->percpu_counters[cpu]; | |
126 | if (layout->shm_fd >= 0) | |
127 | return -EBUSY; | |
128 | return lttng_counter_layout_init(counter, cpu, fd); | |
129 | } | |
130 | ||
131 | static | |
132 | int lttng_counter_set_global_sum_step(struct lib_counter *counter, | |
133 | int64_t global_sum_step) | |
134 | { | |
135 | if (global_sum_step < 0) | |
136 | return -EINVAL; | |
137 | ||
138 | switch (counter->config.counter_size) { | |
139 | case COUNTER_SIZE_8_BIT: | |
140 | if (global_sum_step > INT8_MAX) | |
141 | return -EINVAL; | |
142 | counter->global_sum_step.s8 = (int8_t) global_sum_step; | |
143 | break; | |
144 | case COUNTER_SIZE_16_BIT: | |
145 | if (global_sum_step > INT16_MAX) | |
146 | return -EINVAL; | |
147 | counter->global_sum_step.s16 = (int16_t) global_sum_step; | |
148 | break; | |
149 | case COUNTER_SIZE_32_BIT: | |
150 | if (global_sum_step > INT32_MAX) | |
151 | return -EINVAL; | |
152 | counter->global_sum_step.s32 = (int32_t) global_sum_step; | |
153 | break; | |
154 | case COUNTER_SIZE_64_BIT: | |
155 | counter->global_sum_step.s64 = global_sum_step; | |
156 | break; | |
157 | default: | |
158 | return -EINVAL; | |
159 | } | |
160 | ||
161 | return 0; | |
162 | } | |
163 | ||
164 | static | |
165 | int validate_args(const struct lib_counter_config *config, | |
2208d8b5 | 166 | size_t nr_dimensions __attribute__((unused)), |
ebabbf58 MD |
167 | const size_t *max_nr_elem, |
168 | int64_t global_sum_step, | |
169 | int global_counter_fd, | |
170 | int nr_counter_cpu_fds, | |
171 | const int *counter_cpu_fds) | |
172 | { | |
173 | int nr_cpus = lttng_counter_num_possible_cpus(); | |
174 | ||
175 | if (CAA_BITS_PER_LONG != 64 && config->counter_size == COUNTER_SIZE_64_BIT) { | |
176 | WARN_ON_ONCE(1); | |
177 | return -1; | |
178 | } | |
179 | if (!max_nr_elem) | |
180 | return -1; | |
181 | /* | |
182 | * global sum step is only useful with allocating both per-cpu | |
183 | * and global counters. | |
184 | */ | |
185 | if (global_sum_step && (!(config->alloc & COUNTER_ALLOC_GLOBAL) || | |
186 | !(config->alloc & COUNTER_ALLOC_PER_CPU))) | |
187 | return -1; | |
188 | if (!(config->alloc & COUNTER_ALLOC_GLOBAL) && global_counter_fd >= 0) | |
189 | return -1; | |
190 | if (!(config->alloc & COUNTER_ALLOC_PER_CPU) && counter_cpu_fds) | |
191 | return -1; | |
41d6c53d | 192 | if (!(config->alloc & COUNTER_ALLOC_PER_CPU) && nr_counter_cpu_fds >= 0) |
ebabbf58 MD |
193 | return -1; |
194 | if (counter_cpu_fds && nr_cpus != nr_counter_cpu_fds) | |
195 | return -1; | |
196 | return 0; | |
197 | } | |
198 | ||
199 | struct lib_counter *lttng_counter_create(const struct lib_counter_config *config, | |
200 | size_t nr_dimensions, | |
201 | const size_t *max_nr_elem, | |
202 | int64_t global_sum_step, | |
203 | int global_counter_fd, | |
204 | int nr_counter_cpu_fds, | |
205 | const int *counter_cpu_fds, | |
206 | bool is_daemon) | |
207 | { | |
208 | struct lib_counter *counter; | |
209 | size_t dimension, nr_elem = 1; | |
210 | int cpu, ret; | |
211 | int nr_handles = 0; | |
212 | int nr_cpus = lttng_counter_num_possible_cpus(); | |
213 | ||
214 | if (validate_args(config, nr_dimensions, max_nr_elem, | |
215 | global_sum_step, global_counter_fd, nr_counter_cpu_fds, | |
216 | counter_cpu_fds)) | |
217 | return NULL; | |
218 | counter = zmalloc(sizeof(struct lib_counter)); | |
219 | if (!counter) | |
220 | return NULL; | |
221 | counter->global_counters.shm_fd = -1; | |
222 | counter->config = *config; | |
223 | counter->is_daemon = is_daemon; | |
224 | if (lttng_counter_set_global_sum_step(counter, global_sum_step)) | |
225 | goto error_sum_step; | |
226 | counter->nr_dimensions = nr_dimensions; | |
227 | counter->dimensions = zmalloc(nr_dimensions * sizeof(*counter->dimensions)); | |
228 | if (!counter->dimensions) | |
229 | goto error_dimensions; | |
230 | for (dimension = 0; dimension < nr_dimensions; dimension++) | |
231 | counter->dimensions[dimension].max_nr_elem = max_nr_elem[dimension]; | |
232 | if (config->alloc & COUNTER_ALLOC_PER_CPU) { | |
233 | counter->percpu_counters = zmalloc(sizeof(struct lib_counter_layout) * nr_cpus); | |
234 | if (!counter->percpu_counters) | |
235 | goto error_alloc_percpu; | |
236 | lttng_counter_for_each_possible_cpu(cpu) | |
237 | counter->percpu_counters[cpu].shm_fd = -1; | |
238 | } | |
239 | ||
240 | if (lttng_counter_init_stride(config, counter)) | |
241 | goto error_init_stride; | |
242 | //TODO saturation values. | |
243 | for (dimension = 0; dimension < counter->nr_dimensions; dimension++) | |
244 | nr_elem *= lttng_counter_get_dimension_nr_elements(&counter->dimensions[dimension]); | |
245 | counter->allocated_elem = nr_elem; | |
246 | ||
247 | if (config->alloc & COUNTER_ALLOC_GLOBAL) | |
248 | nr_handles++; | |
249 | if (config->alloc & COUNTER_ALLOC_PER_CPU) | |
250 | nr_handles += nr_cpus; | |
251 | /* Allocate table for global and per-cpu counters. */ | |
252 | counter->object_table = lttng_counter_shm_object_table_create(nr_handles); | |
253 | if (!counter->object_table) | |
254 | goto error_alloc_object_table; | |
255 | ||
256 | if (config->alloc & COUNTER_ALLOC_GLOBAL) { | |
257 | ret = lttng_counter_layout_init(counter, -1, global_counter_fd); /* global */ | |
258 | if (ret) | |
259 | goto layout_init_error; | |
260 | } | |
261 | if ((config->alloc & COUNTER_ALLOC_PER_CPU) && counter_cpu_fds) { | |
262 | lttng_counter_for_each_possible_cpu(cpu) { | |
263 | ret = lttng_counter_layout_init(counter, cpu, counter_cpu_fds[cpu]); | |
264 | if (ret) | |
265 | goto layout_init_error; | |
266 | } | |
267 | } | |
268 | return counter; | |
269 | ||
270 | layout_init_error: | |
271 | lttng_counter_shm_object_table_destroy(counter->object_table, is_daemon); | |
272 | error_alloc_object_table: | |
273 | error_init_stride: | |
274 | free(counter->percpu_counters); | |
275 | error_alloc_percpu: | |
276 | free(counter->dimensions); | |
277 | error_dimensions: | |
278 | error_sum_step: | |
279 | free(counter); | |
280 | return NULL; | |
281 | } | |
282 | ||
283 | void lttng_counter_destroy(struct lib_counter *counter) | |
284 | { | |
285 | struct lib_counter_config *config = &counter->config; | |
286 | ||
287 | if (config->alloc & COUNTER_ALLOC_PER_CPU) | |
288 | free(counter->percpu_counters); | |
289 | lttng_counter_shm_object_table_destroy(counter->object_table, counter->is_daemon); | |
290 | free(counter->dimensions); | |
291 | free(counter); | |
292 | } | |
293 | ||
294 | int lttng_counter_get_global_shm(struct lib_counter *counter, int *fd, size_t *len) | |
295 | { | |
296 | int shm_fd; | |
297 | ||
298 | shm_fd = counter->global_counters.shm_fd; | |
299 | if (shm_fd < 0) | |
300 | return -1; | |
301 | *fd = shm_fd; | |
302 | *len = counter->global_counters.shm_len; | |
303 | return 0; | |
304 | } | |
305 | ||
306 | int lttng_counter_get_cpu_shm(struct lib_counter *counter, int cpu, int *fd, size_t *len) | |
307 | { | |
308 | struct lib_counter_layout *layout; | |
309 | int shm_fd; | |
310 | ||
311 | if (cpu >= lttng_counter_num_possible_cpus()) | |
312 | return -1; | |
313 | layout = &counter->percpu_counters[cpu]; | |
314 | shm_fd = layout->shm_fd; | |
315 | if (shm_fd < 0) | |
316 | return -1; | |
317 | *fd = shm_fd; | |
318 | *len = layout->shm_len; | |
319 | return 0; | |
320 | } | |
321 | ||
322 | int lttng_counter_read(const struct lib_counter_config *config, | |
323 | struct lib_counter *counter, | |
324 | const size_t *dimension_indexes, | |
325 | int cpu, int64_t *value, bool *overflow, | |
326 | bool *underflow) | |
327 | { | |
328 | size_t index; | |
329 | struct lib_counter_layout *layout; | |
330 | ||
331 | if (caa_unlikely(lttng_counter_validate_indexes(config, counter, dimension_indexes))) | |
332 | return -EOVERFLOW; | |
333 | index = lttng_counter_get_index(config, counter, dimension_indexes); | |
334 | ||
335 | switch (config->alloc) { | |
336 | case COUNTER_ALLOC_PER_CPU: | |
337 | if (cpu < 0 || cpu >= lttng_counter_num_possible_cpus()) | |
338 | return -EINVAL; | |
339 | layout = &counter->percpu_counters[cpu]; | |
340 | break; | |
341 | case COUNTER_ALLOC_PER_CPU | COUNTER_ALLOC_GLOBAL: | |
342 | if (cpu >= 0) { | |
343 | if (cpu >= lttng_counter_num_possible_cpus()) | |
344 | return -EINVAL; | |
345 | layout = &counter->percpu_counters[cpu]; | |
346 | } else { | |
347 | layout = &counter->global_counters; | |
348 | } | |
349 | break; | |
350 | case COUNTER_ALLOC_GLOBAL: | |
351 | if (cpu >= 0) | |
352 | return -EINVAL; | |
353 | layout = &counter->global_counters; | |
354 | break; | |
355 | default: | |
356 | return -EINVAL; | |
357 | } | |
358 | if (caa_unlikely(!layout->counters)) | |
359 | return -ENODEV; | |
360 | ||
361 | switch (config->counter_size) { | |
362 | case COUNTER_SIZE_8_BIT: | |
363 | { | |
364 | int8_t *int_p = (int8_t *) layout->counters + index; | |
365 | *value = (int64_t) CMM_LOAD_SHARED(*int_p); | |
366 | break; | |
367 | } | |
368 | case COUNTER_SIZE_16_BIT: | |
369 | { | |
370 | int16_t *int_p = (int16_t *) layout->counters + index; | |
371 | *value = (int64_t) CMM_LOAD_SHARED(*int_p); | |
372 | break; | |
373 | } | |
374 | case COUNTER_SIZE_32_BIT: | |
375 | { | |
376 | int32_t *int_p = (int32_t *) layout->counters + index; | |
377 | *value = (int64_t) CMM_LOAD_SHARED(*int_p); | |
378 | break; | |
379 | } | |
380 | #if CAA_BITS_PER_LONG == 64 | |
381 | case COUNTER_SIZE_64_BIT: | |
382 | { | |
383 | int64_t *int_p = (int64_t *) layout->counters + index; | |
384 | *value = CMM_LOAD_SHARED(*int_p); | |
385 | break; | |
386 | } | |
387 | #endif | |
388 | default: | |
389 | return -EINVAL; | |
390 | } | |
391 | *overflow = lttng_bitmap_test_bit(index, layout->overflow_bitmap); | |
392 | *underflow = lttng_bitmap_test_bit(index, layout->underflow_bitmap); | |
393 | return 0; | |
394 | } | |
395 | ||
396 | int lttng_counter_aggregate(const struct lib_counter_config *config, | |
397 | struct lib_counter *counter, | |
398 | const size_t *dimension_indexes, | |
399 | int64_t *value, bool *overflow, | |
400 | bool *underflow) | |
401 | { | |
402 | int cpu, ret; | |
403 | int64_t v, sum = 0; | |
404 | bool of, uf; | |
405 | ||
406 | *overflow = false; | |
407 | *underflow = false; | |
408 | ||
409 | switch (config->alloc) { | |
410 | case COUNTER_ALLOC_GLOBAL: /* Fallthrough */ | |
411 | case COUNTER_ALLOC_PER_CPU | COUNTER_ALLOC_GLOBAL: | |
412 | /* Read global counter. */ | |
413 | ret = lttng_counter_read(config, counter, dimension_indexes, | |
414 | -1, &v, &of, &uf); | |
415 | if (ret < 0) | |
416 | return ret; | |
417 | sum += v; | |
418 | *overflow |= of; | |
419 | *underflow |= uf; | |
420 | break; | |
421 | case COUNTER_ALLOC_PER_CPU: | |
422 | break; | |
423 | default: | |
424 | return -EINVAL; | |
425 | } | |
426 | ||
427 | switch (config->alloc) { | |
428 | case COUNTER_ALLOC_GLOBAL: | |
429 | break; | |
430 | case COUNTER_ALLOC_PER_CPU | COUNTER_ALLOC_GLOBAL: /* Fallthrough */ | |
431 | case COUNTER_ALLOC_PER_CPU: | |
432 | lttng_counter_for_each_possible_cpu(cpu) { | |
433 | int64_t old = sum; | |
434 | ||
435 | ret = lttng_counter_read(config, counter, dimension_indexes, | |
436 | cpu, &v, &of, &uf); | |
437 | if (ret < 0) | |
438 | return ret; | |
439 | *overflow |= of; | |
440 | *underflow |= uf; | |
441 | /* Overflow is defined on unsigned types. */ | |
442 | sum = (int64_t) ((uint64_t) old + (uint64_t) v); | |
443 | if (v > 0 && sum < old) | |
444 | *overflow = true; | |
445 | else if (v < 0 && sum > old) | |
446 | *underflow = true; | |
447 | } | |
448 | break; | |
449 | default: | |
450 | return -EINVAL; | |
451 | } | |
452 | *value = sum; | |
453 | return 0; | |
454 | } | |
455 | ||
456 | static | |
457 | int lttng_counter_clear_cpu(const struct lib_counter_config *config, | |
458 | struct lib_counter *counter, | |
459 | const size_t *dimension_indexes, | |
460 | int cpu) | |
461 | { | |
462 | size_t index; | |
463 | struct lib_counter_layout *layout; | |
464 | ||
465 | if (caa_unlikely(lttng_counter_validate_indexes(config, counter, dimension_indexes))) | |
466 | return -EOVERFLOW; | |
467 | index = lttng_counter_get_index(config, counter, dimension_indexes); | |
468 | ||
469 | switch (config->alloc) { | |
470 | case COUNTER_ALLOC_PER_CPU: | |
471 | if (cpu < 0 || cpu >= lttng_counter_num_possible_cpus()) | |
472 | return -EINVAL; | |
473 | layout = &counter->percpu_counters[cpu]; | |
474 | break; | |
475 | case COUNTER_ALLOC_PER_CPU | COUNTER_ALLOC_GLOBAL: | |
476 | if (cpu >= 0) { | |
477 | if (cpu >= lttng_counter_num_possible_cpus()) | |
478 | return -EINVAL; | |
479 | layout = &counter->percpu_counters[cpu]; | |
480 | } else { | |
481 | layout = &counter->global_counters; | |
482 | } | |
483 | break; | |
484 | case COUNTER_ALLOC_GLOBAL: | |
485 | if (cpu >= 0) | |
486 | return -EINVAL; | |
487 | layout = &counter->global_counters; | |
488 | break; | |
489 | default: | |
490 | return -EINVAL; | |
491 | } | |
492 | if (caa_unlikely(!layout->counters)) | |
493 | return -ENODEV; | |
494 | ||
495 | switch (config->counter_size) { | |
496 | case COUNTER_SIZE_8_BIT: | |
497 | { | |
498 | int8_t *int_p = (int8_t *) layout->counters + index; | |
499 | CMM_STORE_SHARED(*int_p, 0); | |
500 | break; | |
501 | } | |
502 | case COUNTER_SIZE_16_BIT: | |
503 | { | |
504 | int16_t *int_p = (int16_t *) layout->counters + index; | |
505 | CMM_STORE_SHARED(*int_p, 0); | |
506 | break; | |
507 | } | |
508 | case COUNTER_SIZE_32_BIT: | |
509 | { | |
510 | int32_t *int_p = (int32_t *) layout->counters + index; | |
511 | CMM_STORE_SHARED(*int_p, 0); | |
512 | break; | |
513 | } | |
514 | #if CAA_BITS_PER_LONG == 64 | |
515 | case COUNTER_SIZE_64_BIT: | |
516 | { | |
517 | int64_t *int_p = (int64_t *) layout->counters + index; | |
518 | CMM_STORE_SHARED(*int_p, 0); | |
519 | break; | |
520 | } | |
521 | #endif | |
522 | default: | |
523 | return -EINVAL; | |
524 | } | |
525 | lttng_bitmap_clear_bit(index, layout->overflow_bitmap); | |
526 | lttng_bitmap_clear_bit(index, layout->underflow_bitmap); | |
527 | return 0; | |
528 | } | |
529 | ||
530 | int lttng_counter_clear(const struct lib_counter_config *config, | |
531 | struct lib_counter *counter, | |
532 | const size_t *dimension_indexes) | |
533 | { | |
534 | int cpu, ret; | |
535 | ||
536 | switch (config->alloc) { | |
537 | case COUNTER_ALLOC_PER_CPU: | |
538 | break; | |
539 | case COUNTER_ALLOC_GLOBAL: /* Fallthrough */ | |
540 | case COUNTER_ALLOC_PER_CPU | COUNTER_ALLOC_GLOBAL: | |
541 | /* Clear global counter. */ | |
542 | ret = lttng_counter_clear_cpu(config, counter, dimension_indexes, -1); | |
543 | if (ret < 0) | |
544 | return ret; | |
545 | break; | |
546 | default: | |
547 | return -EINVAL; | |
548 | } | |
549 | ||
550 | switch (config->alloc) { | |
551 | case COUNTER_ALLOC_PER_CPU: /* Fallthrough */ | |
552 | case COUNTER_ALLOC_PER_CPU | COUNTER_ALLOC_GLOBAL: | |
553 | lttng_counter_for_each_possible_cpu(cpu) { | |
554 | ret = lttng_counter_clear_cpu(config, counter, dimension_indexes, cpu); | |
555 | if (ret < 0) | |
556 | return ret; | |
557 | } | |
558 | break; | |
559 | case COUNTER_ALLOC_GLOBAL: | |
560 | break; | |
561 | default: | |
562 | return -EINVAL; | |
563 | } | |
564 | return 0; | |
565 | } |