perf tools: Create function to perform multiple time range checking (9a9b8b4b) · Commits · 戴 / test

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>

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);

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