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perf tools: Create function to perform multiple time range checking

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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@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1512738826-2628-5-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jin Yao
2017-12-08 21:13:44 +08:00
committed by Arnaldo Carvalho de Melo
parent 13a70f3506
commit 9a9b8b4b22
2 changed files with 31 additions and 0 deletions
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28
tools/perf/util/time-utils.c
View File

@@ -300,6 +300,34 @@ bool perf_time__skip_sample(struct perf_time_interval *ptime, u64 timestamp)
return false; 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) int timestamp__scnprintf_usec(u64 timestamp, char *buf, size_t sz)
{ {
u64 sec = timestamp / NSEC_PER_SEC; u64 sec = timestamp / NSEC_PER_SEC;

3
tools/perf/util/time-utils.h
View File

@@ -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__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 timestamp__scnprintf_usec(u64 timestamp, char *buf, size_t sz);
int fetch_current_timestamp(char *buf, size_t sz); int fetch_current_timestamp(char *buf, size_t sz);