1 // SPDX-License-Identifier: GPL-2.0
5 #include <linux/time64.h>
13 #include "time-utils.h"
15 int parse_nsec_time(const char *str, u64 *ptime)
17 u64 time_sec, time_nsec;
20 time_sec = strtoul(str, &end, 10);
21 if (*end != '.' && *end != '\0')
28 if (strlen(++end) > 9)
31 strncpy(nsec_buf, end, 9);
34 /* make it nsec precision */
35 for (i = strlen(nsec_buf); i < 9; i++)
38 time_nsec = strtoul(nsec_buf, &end, 10);
44 *ptime = time_sec * NSEC_PER_SEC + time_nsec;
48 static int parse_timestr_sec_nsec(struct perf_time_interval *ptime,
49 char *start_str, char *end_str)
51 if (start_str && (*start_str != '\0') &&
52 (parse_nsec_time(start_str, &ptime->start) != 0)) {
56 if (end_str && (*end_str != '\0') &&
57 (parse_nsec_time(end_str, &ptime->end) != 0)) {
64 static int split_start_end(char **start, char **end, const char *ostr, char ch)
66 char *start_str, *end_str;
69 if (ostr == NULL || *ostr == '\0')
72 /* copy original string because we need to modify it */
78 d = strchr(start_str, ch);
91 int perf_time__parse_str(struct perf_time_interval *ptime, const char *ostr)
93 char *start_str = NULL, *end_str;
96 rc = split_start_end(&start_str, &end_str, ostr, ',');
103 rc = parse_timestr_sec_nsec(ptime, start_str, end_str);
107 /* make sure end time is after start time if it was given */
108 if (rc == 0 && ptime->end && ptime->end < ptime->start)
111 pr_debug("start time %" PRIu64 ", ", ptime->start);
112 pr_debug("end time %" PRIu64 "\n", ptime->end);
117 static int parse_percent(double *pcnt, char *str)
122 c = strchr(str, '%');
128 d = strtod(str, &endptr);
129 if (endptr != str + strlen(str))
136 static int percent_slash_split(char *str, struct perf_time_interval *ptime,
140 double pcnt, start_pcnt, end_pcnt;
141 u64 total = end - start;
146 * 10%/2: select the second 10% slice and the third 10% slice
149 /* We can modify this string since the original one is copied */
150 p = strchr(str, '/');
155 if (parse_percent(&pcnt, str) < 0)
159 i = (int)strtol(p, &end_str, 10);
166 start_pcnt = pcnt * (i - 1);
169 if (start_pcnt < 0.0 || start_pcnt > 1.0 ||
170 end_pcnt < 0.0 || end_pcnt > 1.0) {
174 ptime->start = start + round(start_pcnt * total);
175 ptime->end = start + round(end_pcnt * total);
180 static int percent_dash_split(char *str, struct perf_time_interval *ptime,
183 char *start_str = NULL, *end_str;
184 double start_pcnt, end_pcnt;
185 u64 total = end - start;
192 ret = split_start_end(&start_str, &end_str, str, '-');
193 if (ret || !start_str)
196 if ((parse_percent(&start_pcnt, start_str) != 0) ||
197 (parse_percent(&end_pcnt, end_str) != 0)) {
204 if (start_pcnt < 0.0 || start_pcnt > 1.0 ||
205 end_pcnt < 0.0 || end_pcnt > 1.0 ||
206 start_pcnt > end_pcnt) {
210 ptime->start = start + round(start_pcnt * total);
211 ptime->end = start + round(end_pcnt * total);
216 typedef int (*time_pecent_split)(char *, struct perf_time_interval *,
219 static int percent_comma_split(struct perf_time_interval *ptime_buf, int num,
220 const char *ostr, u64 start, u64 end,
221 time_pecent_split func)
233 while (p1 < str + len) {
239 p2 = strchr(p1, ',');
243 ret = (func)(p1, &ptime_buf[i], start, end);
249 pr_debug("start time %d: %" PRIu64 ", ", i, ptime_buf[i].start);
250 pr_debug("end time %d: %" PRIu64 "\n", i, ptime_buf[i].end);
264 static int one_percent_convert(struct perf_time_interval *ptime_buf,
265 const char *ostr, u64 start, u64 end, char *c)
268 int len = strlen(ostr), ret;
272 * '%' should be the last character
274 if (ostr + len - 1 != c)
278 * Construct a string like "xx%/1"
280 str = malloc(len + 3);
284 memcpy(str, ostr, len);
285 strcpy(str + len, "/1");
287 ret = percent_slash_split(str, ptime_buf, start, end);
295 int perf_time__percent_parse_str(struct perf_time_interval *ptime_buf, int num,
296 const char *ostr, u64 start, u64 end)
302 * 10%/2,10%/3: select the second 10% slice and the third 10% slice
303 * 0%-10%,30%-40%: multiple time range
304 * 50%: just one percent
307 memset(ptime_buf, 0, sizeof(*ptime_buf) * num);
309 c = strchr(ostr, '/');
311 return percent_comma_split(ptime_buf, num, ostr, start,
312 end, percent_slash_split);
315 c = strchr(ostr, '-');
317 return percent_comma_split(ptime_buf, num, ostr, start,
318 end, percent_dash_split);
321 c = strchr(ostr, '%');
323 return one_percent_convert(ptime_buf, ostr, start, end, c);
328 struct perf_time_interval *perf_time__range_alloc(const char *ostr, int *size)
332 struct perf_time_interval *ptime;
335 * At least allocate one time range.
341 while (p1 < ostr + strlen(ostr)) {
342 p2 = strchr(p1, ',');
352 ptime = calloc(i, sizeof(*ptime));
356 bool perf_time__skip_sample(struct perf_time_interval *ptime, u64 timestamp)
358 /* if time is not set don't drop sample */
362 /* otherwise compare sample time to time window */
363 if ((ptime->start && timestamp < ptime->start) ||
364 (ptime->end && timestamp > ptime->end)) {
371 bool perf_time__ranges_skip_sample(struct perf_time_interval *ptime_buf,
372 int num, u64 timestamp)
374 struct perf_time_interval *ptime;
377 if ((timestamp == 0) || (num == 0))
381 return perf_time__skip_sample(&ptime_buf[0], timestamp);
384 * start/end of multiple time ranges must be valid.
386 for (i = 0; i < num; i++) {
387 ptime = &ptime_buf[i];
389 if (timestamp >= ptime->start &&
390 ((timestamp < ptime->end && i < num - 1) ||
391 (timestamp <= ptime->end && i == num - 1))) {
396 return (i == num) ? true : false;
399 int timestamp__scnprintf_usec(u64 timestamp, char *buf, size_t sz)
401 u64 sec = timestamp / NSEC_PER_SEC;
402 u64 usec = (timestamp % NSEC_PER_SEC) / NSEC_PER_USEC;
404 return scnprintf(buf, sz, "%"PRIu64".%06"PRIu64, sec, usec);
407 int fetch_current_timestamp(char *buf, size_t sz)
413 if (gettimeofday(&tv, NULL) || !localtime_r(&tv.tv_sec, &tm))
416 if (!strftime(dt, sizeof(dt), "%Y%m%d%H%M%S", &tm))
419 scnprintf(buf, sz, "%s%02u", dt, (unsigned)tv.tv_usec / 10000);