lkml.org 
[lkml]   [2017]   [Sep]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v3 4/6] perf util: Create function to perform multiple time range checking
Date
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%].

Note that it includes the last element in [10%, 20%] but it
doesn't include the last element in [0, 10%). It's to avoid
the overlap.

This patch implments a new function perf_time__ranges_skip_sample
for this checking.

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
---
tools/perf/util/time-utils.c | 22 ++++++++++++++++++++++
tools/perf/util/time-utils.h | 3 +++
2 files changed, 25 insertions(+)

diff --git a/tools/perf/util/time-utils.c b/tools/perf/util/time-utils.c
index d46490f..e2e9b33 100644
--- a/tools/perf/util/time-utils.c
+++ b/tools/perf/util/time-utils.c
@@ -297,6 +297,28 @@ 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 && i < num - 1) ||
+ (timestamp <= ptime->end && i == num - 1))) {
+ 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
\
 
 \ /
  Last update: 2017-09-28 06:50    [W:0.082 / U:1.572 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site