perf tools: Create function to parse time percent
Current perf report/script/... have a --time option to limit the time
range of output. But right now it only supports absolute time, add
support for time percentage.
For example:
1. Select the second 10% time slice
perf report --time 10%/2
2. Select from 0% to 10% time slice
perf report --time 0%-10%
It also support the multiple time ranges.
3. Select the first and second 10% time slices
perf report --time 10%/1,10%/2
4. Select from 0% to 10% and 30% to 40% slices
perf report --time 0%-10%,30%-40%
Changelog:
v4: An issue is found. Following passes.
perf script --time 10%/10x12321xsdfdasfdsafdsafdsa
Now it uses strtol to replace atoi.
Committer notes:
This just puts in place the infrastructure, so the examples in this cset
comment will only work later, after more patches in this series are
applied.
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/1512738826-2628-4-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/time-utils.h b/tools/perf/util/time-utils.h
index 15b475c..2308723 100644
--- a/tools/perf/util/time-utils.h
+++ b/tools/perf/util/time-utils.h
@@ -13,6 +13,9 @@ int parse_nsec_time(const char *str, u64 *ptime);
int perf_time__parse_str(struct perf_time_interval *ptime, const char *ostr);
+int perf_time__percent_parse_str(struct perf_time_interval *ptime_buf, int num,
+ const char *ostr, u64 start, u64 end);
+
bool perf_time__skip_sample(struct perf_time_interval *ptime, u64 timestamp);
int timestamp__scnprintf_usec(u64 timestamp, char *buf, size_t sz);