diff options
author | David Ahern <dsa@cumulusnetworks.com> | 2016-11-29 20:15:41 +0300 |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-12-01 19:02:32 +0300 |
commit | fdf9dc4b34f5f40919370c4601eccfd0db726aa5 (patch) | |
tree | 035673547bf98ad5bf0208421683e05c593c6070 | |
parent | 64eff7d9c4469b7e24fb7e5416a67ee5959c3f76 (diff) | |
download | linux-fdf9dc4b34f5f40919370c4601eccfd0db726aa5.tar.xz |
perf tools: Add time-based utility functions
Add function to parse a user time string of the form <start>,<stop>
where start and stop are time in sec.nsec format. Both start and stop
times are optional.
Add function to determine if a sample time is within a given time
time window of interest.
Signed-off-by: David Ahern <dsahern@gmail.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1480439746-42695-2-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
-rw-r--r-- | tools/perf/util/Build | 1 | ||||
-rw-r--r-- | tools/perf/util/time-utils.c | 85 | ||||
-rw-r--r-- | tools/perf/util/time-utils.h | 12 |
3 files changed, 98 insertions, 0 deletions
diff --git a/tools/perf/util/Build b/tools/perf/util/Build index b2a47aac8d1c..bdad82a9812d 100644 --- a/tools/perf/util/Build +++ b/tools/perf/util/Build @@ -87,6 +87,7 @@ libperf-y += help-unknown-cmd.o libperf-y += mem-events.o libperf-y += vsprintf.o libperf-y += drv_configs.o +libperf-y += time-utils.o libperf-$(CONFIG_LIBBPF) += bpf-loader.o libperf-$(CONFIG_BPF_PROLOGUE) += bpf-prologue.o diff --git a/tools/perf/util/time-utils.c b/tools/perf/util/time-utils.c new file mode 100644 index 000000000000..0443b2afd0cf --- /dev/null +++ b/tools/perf/util/time-utils.c @@ -0,0 +1,85 @@ +#include <string.h> +#include <sys/time.h> +#include <time.h> +#include <errno.h> +#include <inttypes.h> + +#include "perf.h" +#include "debug.h" +#include "time-utils.h" +#include "util.h" + +static int parse_timestr_sec_nsec(struct perf_time_interval *ptime, + char *start_str, char *end_str) +{ + if (start_str && (*start_str != '\0') && + (parse_nsec_time(start_str, &ptime->start) != 0)) { + return -1; + } + + if (end_str && (*end_str != '\0') && + (parse_nsec_time(end_str, &ptime->end) != 0)) { + return -1; + } + + return 0; +} + +int perf_time__parse_str(struct perf_time_interval *ptime, const char *ostr) +{ + char *start_str, *end_str; + char *d, *str; + int rc = 0; + + if (ostr == NULL || *ostr == '\0') + return 0; + + /* copy original string because we need to modify it */ + str = strdup(ostr); + if (str == NULL) + return -ENOMEM; + + ptime->start = 0; + ptime->end = 0; + + /* str has the format: <start>,<stop> + * variations: <start>, + * ,<stop> + * , + */ + start_str = str; + d = strchr(start_str, ','); + if (d) { + *d = '\0'; + ++d; + } + end_str = d; + + rc = parse_timestr_sec_nsec(ptime, start_str, end_str); + + free(str); + + /* make sure end time is after start time if it was given */ + if (rc == 0 && ptime->end && ptime->end < ptime->start) + return -EINVAL; + + pr_debug("start time %" PRIu64 ", ", ptime->start); + pr_debug("end time %" PRIu64 "\n", ptime->end); + + return rc; +} + +bool perf_time__skip_sample(struct perf_time_interval *ptime, u64 timestamp) +{ + /* if time is not set don't drop sample */ + if (timestamp == 0) + return false; + + /* otherwise compare sample time to time window */ + if ((ptime->start && timestamp < ptime->start) || + (ptime->end && timestamp > ptime->end)) { + return true; + } + + return false; +} diff --git a/tools/perf/util/time-utils.h b/tools/perf/util/time-utils.h new file mode 100644 index 000000000000..8f3e0e370be8 --- /dev/null +++ b/tools/perf/util/time-utils.h @@ -0,0 +1,12 @@ +#ifndef _TIME_UTILS_H_ +#define _TIME_UTILS_H_ + +struct perf_time_interval { + u64 start, end; +}; + +int perf_time__parse_str(struct perf_time_interval *ptime, const char *ostr); + +bool perf_time__skip_sample(struct perf_time_interval *ptime, u64 timestamp); + +#endif |