[PATCH v1 4/6] perf util: Create function to perform multiple time range checking

From: Jin Yao
Date: Wed Sep 20 2017 - 03:17:07 EST


Previous patch supports the multiple time range.

For example, select the first and second 10% time slices.
perf report --time 10%/1,10%/2

We need a function to check if a timestamp is in the ranges of
[0, 10%) and [10%, 20%).

This patch implments a new function perf_time__ranges_skip_sample.

Signed-off-by: Jin Yao <yao.jin@xxxxxxxxxxxxxxx>
---
tools/perf/util/time-utils.c | 21 +++++++++++++++++++++
tools/perf/util/time-utils.h | 3 +++
2 files changed, 24 insertions(+)

diff --git a/tools/perf/util/time-utils.c b/tools/perf/util/time-utils.c
index d46490f..d1f5121 100644
--- a/tools/perf/util/time-utils.c
+++ b/tools/perf/util/time-utils.c
@@ -297,6 +297,27 @@ bool perf_time__skip_sample(struct perf_time_interval *ptime, u64 timestamp)
return false;
}

+bool perf_time__ranges_skip_sample(struct perf_time_interval *ptime_buf,
+ int num, u64 timestamp)
+{
+ struct perf_time_interval *ptime;
+ int i;
+
+ if ((timestamp == 0) || (num == 0))
+ return false;
+
+ for (i = 0; i < num; i++) {
+ ptime = &ptime_buf[i];
+
+ if ((timestamp >= ptime->start) &&
+ (timestamp < ptime->end)) {
+ break;
+ }
+ }
+
+ return (i == num) ? true : false;
+}
+
int timestamp__scnprintf_usec(u64 timestamp, char *buf, size_t sz)
{
u64 sec = timestamp / NSEC_PER_SEC;
diff --git a/tools/perf/util/time-utils.h b/tools/perf/util/time-utils.h
index fd018e2..de279ea 100644
--- a/tools/perf/util/time-utils.h
+++ b/tools/perf/util/time-utils.h
@@ -17,6 +17,9 @@ int perf_time__percent_parse_str(struct perf_time_interval *ptime_buf, int num,

bool perf_time__skip_sample(struct perf_time_interval *ptime, u64 timestamp);

+bool perf_time__ranges_skip_sample(struct perf_time_interval *ptime_buf,
+ int num, u64 timestamp);
+
int timestamp__scnprintf_usec(u64 timestamp, char *buf, size_t sz);

int fetch_current_timestamp(char *buf, size_t sz);
--
2.7.4