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Commit 9a9b8b4b authored by Jin Yao's avatar Jin Yao Committed by Arnaldo Carvalho de Melo
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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: default avatarJin Yao <yao.jin@linux.intel.com>
Acked-by: default avatarJiri 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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 13a70f35

tools/perf/util/time-utils.c

+28 −0
Original line number Diff line number Diff line
@@ -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;

tools/perf/util/time-utils.h

+3 −0
Original line number Diff line number Diff line
@@ -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);