Commit-ID: 9a9b8b4b2271e763c1600311a3d4ecc2ac359b55
Gitweb: https://git.kernel.org/tip/9a9b8b4b2271e763c1600311a3d4ecc2ac359b55
Author: Jin Yao <yao.jin@xxxxxxxxxxxxxxx>
AuthorDate: Fri, 8 Dec 2017 21:13:44 +0800
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Mon, 8 Jan 2018 11:41:06 -0300
perf tools: Create function to perform multiple time range checking
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.
Change log:
v4: Let perf_time__ranges_skip_sample be compatible with
perf_time__skip_sample when only one time range.
Signed-off-by: Jin Yao <yao.jin@xxxxxxxxxxxxxxx>
Acked-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: Kan Liang <kan.liang@xxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1512738826-2628-5-git-send-email-yao.jin@xxxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/util/time-utils.c | 28 ++++++++++++++++++++++++++++
tools/perf/util/time-utils.h | 3 +++
2 files changed, 31 insertions(+)
diff --git a/tools/perf/util/time-utils.c b/tools/perf/util/time-utils.c
index 61c46022..3f7f18f 100644
--- a/tools/perf/util/time-utils.c
+++ b/tools/perf/util/time-utils.c
@@ -300,6 +300,34 @@ 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;
+
+ if (num == 1)
+ return perf_time__skip_sample(&ptime_buf[0], timestamp);
+
+ /*
+ * start/end of multiple time ranges must be valid.
+ */
+ 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 2308723..34d5eba 100644
--- a/tools/perf/util/time-utils.h
+++ b/tools/perf/util/time-utils.h
@@ -18,6 +18,9 @@ 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);
--
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