423 lines
7.9 KiB
C
423 lines
7.9 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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#include <stdlib.h>
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#include <string.h>
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#include <sys/time.h>
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#include <linux/time64.h>
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#include <time.h>
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#include <errno.h>
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#include <inttypes.h>
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#include <math.h>
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#include "perf.h"
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#include "debug.h"
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#include "time-utils.h"
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int parse_nsec_time(const char *str, u64 *ptime)
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{
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u64 time_sec, time_nsec;
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char *end;
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time_sec = strtoul(str, &end, 10);
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if (*end != '.' && *end != '\0')
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return -1;
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if (*end == '.') {
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int i;
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char nsec_buf[10];
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if (strlen(++end) > 9)
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return -1;
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strncpy(nsec_buf, end, 9);
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nsec_buf[9] = '\0';
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/* make it nsec precision */
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for (i = strlen(nsec_buf); i < 9; i++)
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nsec_buf[i] = '0';
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time_nsec = strtoul(nsec_buf, &end, 10);
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if (*end != '\0')
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return -1;
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} else
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time_nsec = 0;
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*ptime = time_sec * NSEC_PER_SEC + time_nsec;
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return 0;
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}
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static int parse_timestr_sec_nsec(struct perf_time_interval *ptime,
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char *start_str, char *end_str)
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{
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if (start_str && (*start_str != '\0') &&
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(parse_nsec_time(start_str, &ptime->start) != 0)) {
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return -1;
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}
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if (end_str && (*end_str != '\0') &&
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(parse_nsec_time(end_str, &ptime->end) != 0)) {
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return -1;
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}
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return 0;
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}
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static int split_start_end(char **start, char **end, const char *ostr, char ch)
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{
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char *start_str, *end_str;
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char *d, *str;
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if (ostr == NULL || *ostr == '\0')
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return 0;
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/* copy original string because we need to modify it */
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str = strdup(ostr);
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if (str == NULL)
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return -ENOMEM;
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start_str = str;
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d = strchr(start_str, ch);
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if (d) {
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*d = '\0';
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++d;
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}
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end_str = d;
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*start = start_str;
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*end = end_str;
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return 0;
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}
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int perf_time__parse_str(struct perf_time_interval *ptime, const char *ostr)
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{
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char *start_str = NULL, *end_str;
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int rc;
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rc = split_start_end(&start_str, &end_str, ostr, ',');
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if (rc || !start_str)
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return rc;
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ptime->start = 0;
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ptime->end = 0;
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rc = parse_timestr_sec_nsec(ptime, start_str, end_str);
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free(start_str);
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/* make sure end time is after start time if it was given */
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if (rc == 0 && ptime->end && ptime->end < ptime->start)
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return -EINVAL;
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pr_debug("start time %" PRIu64 ", ", ptime->start);
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pr_debug("end time %" PRIu64 "\n", ptime->end);
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return rc;
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}
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static int parse_percent(double *pcnt, char *str)
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{
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char *c, *endptr;
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double d;
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c = strchr(str, '%');
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if (c)
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*c = '\0';
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else
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return -1;
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d = strtod(str, &endptr);
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if (endptr != str + strlen(str))
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return -1;
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*pcnt = d / 100.0;
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return 0;
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}
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static int percent_slash_split(char *str, struct perf_time_interval *ptime,
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u64 start, u64 end)
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{
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char *p, *end_str;
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double pcnt, start_pcnt, end_pcnt;
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u64 total = end - start;
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int i;
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/*
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* Example:
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* 10%/2: select the second 10% slice and the third 10% slice
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*/
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/* We can modify this string since the original one is copied */
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p = strchr(str, '/');
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if (!p)
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return -1;
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*p = '\0';
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if (parse_percent(&pcnt, str) < 0)
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return -1;
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p++;
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i = (int)strtol(p, &end_str, 10);
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if (*end_str)
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return -1;
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if (pcnt <= 0.0)
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return -1;
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start_pcnt = pcnt * (i - 1);
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end_pcnt = pcnt * i;
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if (start_pcnt < 0.0 || start_pcnt > 1.0 ||
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end_pcnt < 0.0 || end_pcnt > 1.0) {
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return -1;
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}
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ptime->start = start + round(start_pcnt * total);
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ptime->end = start + round(end_pcnt * total);
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return 0;
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}
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static int percent_dash_split(char *str, struct perf_time_interval *ptime,
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u64 start, u64 end)
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{
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char *start_str = NULL, *end_str;
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double start_pcnt, end_pcnt;
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u64 total = end - start;
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int ret;
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/*
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* Example: 0%-10%
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*/
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ret = split_start_end(&start_str, &end_str, str, '-');
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if (ret || !start_str)
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return ret;
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if ((parse_percent(&start_pcnt, start_str) != 0) ||
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(parse_percent(&end_pcnt, end_str) != 0)) {
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free(start_str);
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return -1;
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}
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free(start_str);
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if (start_pcnt < 0.0 || start_pcnt > 1.0 ||
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end_pcnt < 0.0 || end_pcnt > 1.0 ||
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start_pcnt > end_pcnt) {
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return -1;
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}
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ptime->start = start + round(start_pcnt * total);
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ptime->end = start + round(end_pcnt * total);
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return 0;
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}
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typedef int (*time_pecent_split)(char *, struct perf_time_interval *,
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u64 start, u64 end);
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static int percent_comma_split(struct perf_time_interval *ptime_buf, int num,
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const char *ostr, u64 start, u64 end,
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time_pecent_split func)
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{
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char *str, *p1, *p2;
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int len, ret, i = 0;
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str = strdup(ostr);
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if (str == NULL)
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return -ENOMEM;
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len = strlen(str);
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p1 = str;
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while (p1 < str + len) {
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if (i >= num) {
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free(str);
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return -1;
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}
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p2 = strchr(p1, ',');
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if (p2)
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*p2 = '\0';
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ret = (func)(p1, &ptime_buf[i], start, end);
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if (ret < 0) {
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free(str);
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return -1;
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}
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pr_debug("start time %d: %" PRIu64 ", ", i, ptime_buf[i].start);
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pr_debug("end time %d: %" PRIu64 "\n", i, ptime_buf[i].end);
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i++;
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if (p2)
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p1 = p2 + 1;
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else
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break;
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}
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free(str);
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return i;
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}
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static int one_percent_convert(struct perf_time_interval *ptime_buf,
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const char *ostr, u64 start, u64 end, char *c)
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{
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char *str;
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int len = strlen(ostr), ret;
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/*
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* c points to '%'.
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* '%' should be the last character
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*/
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if (ostr + len - 1 != c)
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return -1;
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/*
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* Construct a string like "xx%/1"
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*/
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str = malloc(len + 3);
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if (str == NULL)
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return -ENOMEM;
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memcpy(str, ostr, len);
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strcpy(str + len, "/1");
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ret = percent_slash_split(str, ptime_buf, start, end);
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if (ret == 0)
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ret = 1;
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free(str);
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return ret;
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}
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int perf_time__percent_parse_str(struct perf_time_interval *ptime_buf, int num,
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const char *ostr, u64 start, u64 end)
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{
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char *c;
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/*
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* ostr example:
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* 10%/2,10%/3: select the second 10% slice and the third 10% slice
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* 0%-10%,30%-40%: multiple time range
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* 50%: just one percent
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*/
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memset(ptime_buf, 0, sizeof(*ptime_buf) * num);
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c = strchr(ostr, '/');
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if (c) {
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return percent_comma_split(ptime_buf, num, ostr, start,
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end, percent_slash_split);
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}
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c = strchr(ostr, '-');
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if (c) {
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return percent_comma_split(ptime_buf, num, ostr, start,
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end, percent_dash_split);
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}
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c = strchr(ostr, '%');
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if (c)
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return one_percent_convert(ptime_buf, ostr, start, end, c);
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return -1;
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}
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struct perf_time_interval *perf_time__range_alloc(const char *ostr, int *size)
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{
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const char *p1, *p2;
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int i = 1;
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struct perf_time_interval *ptime;
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/*
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* At least allocate one time range.
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*/
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if (!ostr)
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goto alloc;
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p1 = ostr;
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while (p1 < ostr + strlen(ostr)) {
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p2 = strchr(p1, ',');
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if (!p2)
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break;
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p1 = p2 + 1;
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i++;
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}
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alloc:
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*size = i;
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ptime = calloc(i, sizeof(*ptime));
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return ptime;
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}
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bool perf_time__skip_sample(struct perf_time_interval *ptime, u64 timestamp)
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{
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/* if time is not set don't drop sample */
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if (timestamp == 0)
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return false;
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/* otherwise compare sample time to time window */
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if ((ptime->start && timestamp < ptime->start) ||
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(ptime->end && timestamp > ptime->end)) {
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return true;
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}
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return false;
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}
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bool perf_time__ranges_skip_sample(struct perf_time_interval *ptime_buf,
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int num, u64 timestamp)
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{
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struct perf_time_interval *ptime;
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int i;
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if ((timestamp == 0) || (num == 0))
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return false;
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if (num == 1)
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return perf_time__skip_sample(&ptime_buf[0], timestamp);
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/*
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* start/end of multiple time ranges must be valid.
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*/
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for (i = 0; i < num; i++) {
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ptime = &ptime_buf[i];
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if (timestamp >= ptime->start &&
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((timestamp < ptime->end && i < num - 1) ||
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(timestamp <= ptime->end && i == num - 1))) {
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break;
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}
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}
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return (i == num) ? true : false;
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}
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int timestamp__scnprintf_usec(u64 timestamp, char *buf, size_t sz)
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{
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u64 sec = timestamp / NSEC_PER_SEC;
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u64 usec = (timestamp % NSEC_PER_SEC) / NSEC_PER_USEC;
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return scnprintf(buf, sz, "%"PRIu64".%06"PRIu64, sec, usec);
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}
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int fetch_current_timestamp(char *buf, size_t sz)
|
||
|
|
{
|
||
|
|
struct timeval tv;
|
||
|
|
struct tm tm;
|
||
|
|
char dt[32];
|
||
|
|
|
||
|
|
if (gettimeofday(&tv, NULL) || !localtime_r(&tv.tv_sec, &tm))
|
||
|
|
return -1;
|
||
|
|
|
||
|
|
if (!strftime(dt, sizeof(dt), "%Y%m%d%H%M%S", &tm))
|
||
|
|
return -1;
|
||
|
|
|
||
|
|
scnprintf(buf, sz, "%s%02u", dt, (unsigned)tv.tv_usec / 10000);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|