1 // SPDX-License-Identifier: GPL-2.0
4 #include <linux/string.h>
6 #include <linux/time64.h>
11 #include <linux/ctype.h>
14 #include "time-utils.h"
18 int parse_nsec_time(const char *str, u64 *ptime)
20 u64 time_sec, time_nsec;
23 time_sec = strtoul(str, &end, 10);
24 if (*end != '.' && *end != '\0')
31 if (strlen(++end) > 9)
34 strncpy(nsec_buf, end, 9);
37 /* make it nsec precision */
38 for (i = strlen(nsec_buf); i < 9; i++)
41 time_nsec = strtoul(nsec_buf, &end, 10);
47 *ptime = time_sec * NSEC_PER_SEC + time_nsec;
51 static int parse_timestr_sec_nsec(struct perf_time_interval *ptime,
52 char *start_str, char *end_str)
54 if (start_str && (*start_str != '\0') &&
55 (parse_nsec_time(start_str, &ptime->start) != 0)) {
59 if (end_str && (*end_str != '\0') &&
60 (parse_nsec_time(end_str, &ptime->end) != 0)) {
67 static int split_start_end(char **start, char **end, const char *ostr, char ch)
69 char *start_str, *end_str;
72 if (ostr == NULL || *ostr == '\0')
75 /* copy original string because we need to modify it */
81 d = strchr(start_str, ch);
94 int perf_time__parse_str(struct perf_time_interval *ptime, const char *ostr)
96 char *start_str = NULL, *end_str;
99 rc = split_start_end(&start_str, &end_str, ostr, ',');
100 if (rc || !start_str)
106 rc = parse_timestr_sec_nsec(ptime, start_str, end_str);
110 /* make sure end time is after start time if it was given */
111 if (rc == 0 && ptime->end && ptime->end < ptime->start)
114 pr_debug("start time %" PRIu64 ", ", ptime->start);
115 pr_debug("end time %" PRIu64 "\n", ptime->end);
120 static int perf_time__parse_strs(struct perf_time_interval *ptime,
121 const char *ostr, int size)
125 int i, num = 0, rc = 0;
127 /* Count the commas */
128 for (cp = ostr; *cp; cp++)
129 num += !!(*cp == ',');
140 /* Split the string and parse each piece, except the last */
141 for (i = 0, p = str; i < num - 1; i++) {
143 /* Find next comma, there must be one */
144 p = skip_spaces(strchr(p, ',') + 1);
145 /* Skip the value, must not contain space or comma */
146 while (*p && !isspace(*p)) {
152 /* Split and parse */
155 rc = perf_time__parse_str(ptime + i, arg);
160 /* Parse the last piece */
161 rc = perf_time__parse_str(ptime + i, p);
165 /* Check there is no overlap */
166 for (i = 0; i < num - 1; i++) {
167 if (ptime[i].end >= ptime[i + 1].start) {
180 static int parse_percent(double *pcnt, char *str)
185 c = strchr(str, '%');
191 d = strtod(str, &endptr);
192 if (endptr != str + strlen(str))
199 static int set_percent_time(struct perf_time_interval *ptime, double start_pcnt,
200 double end_pcnt, u64 start, u64 end)
202 u64 total = end - start;
204 if (start_pcnt < 0.0 || start_pcnt > 1.0 ||
205 end_pcnt < 0.0 || end_pcnt > 1.0) {
209 ptime->start = start + round(start_pcnt * total);
210 ptime->end = start + round(end_pcnt * total);
212 if (ptime->end > ptime->start && ptime->end != end)
218 static int percent_slash_split(char *str, struct perf_time_interval *ptime,
222 double pcnt, start_pcnt, end_pcnt;
227 * 10%/2: select the second 10% slice and the third 10% slice
230 /* We can modify this string since the original one is copied */
231 p = strchr(str, '/');
236 if (parse_percent(&pcnt, str) < 0)
240 i = (int)strtol(p, &end_str, 10);
247 start_pcnt = pcnt * (i - 1);
250 return set_percent_time(ptime, start_pcnt, end_pcnt, start, end);
253 static int percent_dash_split(char *str, struct perf_time_interval *ptime,
256 char *start_str = NULL, *end_str;
257 double start_pcnt, end_pcnt;
264 ret = split_start_end(&start_str, &end_str, str, '-');
265 if (ret || !start_str)
268 if ((parse_percent(&start_pcnt, start_str) != 0) ||
269 (parse_percent(&end_pcnt, end_str) != 0)) {
276 return set_percent_time(ptime, start_pcnt, end_pcnt, start, end);
279 typedef int (*time_pecent_split)(char *, struct perf_time_interval *,
282 static int percent_comma_split(struct perf_time_interval *ptime_buf, int num,
283 const char *ostr, u64 start, u64 end,
284 time_pecent_split func)
296 while (p1 < str + len) {
302 p2 = strchr(p1, ',');
306 ret = (func)(p1, &ptime_buf[i], start, end);
312 pr_debug("start time %d: %" PRIu64 ", ", i, ptime_buf[i].start);
313 pr_debug("end time %d: %" PRIu64 "\n", i, ptime_buf[i].end);
327 static int one_percent_convert(struct perf_time_interval *ptime_buf,
328 const char *ostr, u64 start, u64 end, char *c)
331 int len = strlen(ostr), ret;
335 * '%' should be the last character
337 if (ostr + len - 1 != c)
341 * Construct a string like "xx%/1"
343 str = malloc(len + 3);
347 memcpy(str, ostr, len);
348 strcpy(str + len, "/1");
350 ret = percent_slash_split(str, ptime_buf, start, end);
358 int perf_time__percent_parse_str(struct perf_time_interval *ptime_buf, int num,
359 const char *ostr, u64 start, u64 end)
365 * 10%/2,10%/3: select the second 10% slice and the third 10% slice
366 * 0%-10%,30%-40%: multiple time range
367 * 50%: just one percent
370 memset(ptime_buf, 0, sizeof(*ptime_buf) * num);
372 c = strchr(ostr, '/');
374 return percent_comma_split(ptime_buf, num, ostr, start,
375 end, percent_slash_split);
378 c = strchr(ostr, '-');
380 return percent_comma_split(ptime_buf, num, ostr, start,
381 end, percent_dash_split);
384 c = strchr(ostr, '%');
386 return one_percent_convert(ptime_buf, ostr, start, end, c);
391 struct perf_time_interval *perf_time__range_alloc(const char *ostr, int *size)
395 struct perf_time_interval *ptime;
398 * At least allocate one time range.
404 while (p1 < ostr + strlen(ostr)) {
405 p2 = strchr(p1, ',');
415 ptime = calloc(i, sizeof(*ptime));
419 bool perf_time__skip_sample(struct perf_time_interval *ptime, u64 timestamp)
421 /* if time is not set don't drop sample */
425 /* otherwise compare sample time to time window */
426 if ((ptime->start && timestamp < ptime->start) ||
427 (ptime->end && timestamp > ptime->end)) {
434 bool perf_time__ranges_skip_sample(struct perf_time_interval *ptime_buf,
435 int num, u64 timestamp)
437 struct perf_time_interval *ptime;
440 if ((!ptime_buf) || (timestamp == 0) || (num == 0))
444 return perf_time__skip_sample(&ptime_buf[0], timestamp);
447 * start/end of multiple time ranges must be valid.
449 for (i = 0; i < num; i++) {
450 ptime = &ptime_buf[i];
452 if (timestamp >= ptime->start &&
453 (timestamp <= ptime->end || !ptime->end)) {
461 int perf_time__parse_for_ranges_reltime(const char *time_str,
462 struct perf_session *session,
463 struct perf_time_interval **ranges,
464 int *range_size, int *range_num,
467 bool has_percent = strchr(time_str, '%');
468 struct perf_time_interval *ptime_range;
469 int size, num, ret = -EINVAL;
471 ptime_range = perf_time__range_alloc(time_str, &size);
475 if (has_percent || reltime) {
476 if (session->evlist->first_sample_time == 0 &&
477 session->evlist->last_sample_time == 0) {
478 pr_err("HINT: no first/last sample time found in perf data.\n"
479 "Please use latest perf binary to execute 'perf record'\n"
480 "(if '--buildid-all' is enabled, please set '--timestamp-boundary').\n");
486 num = perf_time__percent_parse_str(
489 session->evlist->first_sample_time,
490 session->evlist->last_sample_time);
492 num = perf_time__parse_strs(ptime_range, time_str, size);
501 for (i = 0; i < num; i++) {
502 ptime_range[i].start += session->evlist->first_sample_time;
503 ptime_range[i].end += session->evlist->first_sample_time;
509 *ranges = ptime_range;
513 pr_err("Invalid time string\n");
519 int perf_time__parse_for_ranges(const char *time_str,
520 struct perf_session *session,
521 struct perf_time_interval **ranges,
522 int *range_size, int *range_num)
524 return perf_time__parse_for_ranges_reltime(time_str, session, ranges,
525 range_size, range_num, false);
528 int timestamp__scnprintf_usec(u64 timestamp, char *buf, size_t sz)
530 u64 sec = timestamp / NSEC_PER_SEC;
531 u64 usec = (timestamp % NSEC_PER_SEC) / NSEC_PER_USEC;
533 return scnprintf(buf, sz, "%"PRIu64".%06"PRIu64, sec, usec);
536 int timestamp__scnprintf_nsec(u64 timestamp, char *buf, size_t sz)
538 u64 sec = timestamp / NSEC_PER_SEC,
539 nsec = timestamp % NSEC_PER_SEC;
541 return scnprintf(buf, sz, "%" PRIu64 ".%09" PRIu64, sec, nsec);
544 int fetch_current_timestamp(char *buf, size_t sz)
550 if (gettimeofday(&tv, NULL) || !localtime_r(&tv.tv_sec, &tm))
553 if (!strftime(dt, sizeof(dt), "%Y%m%d%H%M%S", &tm))
556 scnprintf(buf, sz, "%s%02u", dt, (unsigned)tv.tv_usec / 10000);