mirror of https://gitee.com/openkylin/linux.git
145 lines
2.8 KiB
C
145 lines
2.8 KiB
C
#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 "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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int perf_time__parse_str(struct perf_time_interval *ptime, const char *ostr)
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{
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char *start_str, *end_str;
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char *d, *str;
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int rc = 0;
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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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ptime->start = 0;
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ptime->end = 0;
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/* str has the format: <start>,<stop>
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* variations: <start>,
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* ,<stop>
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* ,
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*/
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start_str = str;
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d = strchr(start_str, ',');
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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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rc = parse_timestr_sec_nsec(ptime, start_str, end_str);
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free(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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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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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)
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{
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struct timeval tv;
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struct tm tm;
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char dt[32];
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if (gettimeofday(&tv, NULL) || !localtime_r(&tv.tv_sec, &tm))
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return -1;
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if (!strftime(dt, sizeof(dt), "%Y%m%d%H%M%S", &tm))
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return -1;
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scnprintf(buf, sz, "%s%02u", dt, (unsigned)tv.tv_usec / 10000);
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return 0;
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}
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