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Subject[PATCH v3 5/6] perf report: support time percent and multiple time ranges
Date
perf report has a --time option to limit the time range of output.
It only supports absolute time.

Now this option is extended to support multiple time ranges and
support the percent of time.

For example:

1. Select the first and second 10% time slices
perf report --time 10%/1,10%/2

2. Select from 0% to 10% and 30% to 40% slices
perf report --time 0%-10%,30%-40%

Change log:
-----------
v3: Since the definitions of first_sample_time/last_sample_time
are moved from perf_session to perf_evlist so change the
related code.

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
---
tools/perf/Documentation/perf-report.txt | 16 ++++++++++++++++
tools/perf/builtin-report.c | 24 ++++++++++++++++++++++--
2 files changed, 38 insertions(+), 2 deletions(-)

diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt
index 383a98d..3a0975c 100644
--- a/tools/perf/Documentation/perf-report.txt
+++ b/tools/perf/Documentation/perf-report.txt
@@ -402,6 +402,22 @@ OPTIONS
stop time is not given (i.e, time string is 'x.y,') then analysis goes
to end of file.

+ Also support time percent with multipe time range. Time string is
+ 'a%/n,b%/m,...' or 'a%-b%,c%-%d,...'. The maximum number of slices is 10.
+
+ For example:
+ Select the second 10% time slice
+ perf report --time 10%/2
+
+ Select from 0% to 10% time slice
+ perf report --time 0%-10%
+
+ Select the first and second 10% time slices
+ perf report --time 10%/1,10%/2
+
+ Select from 0% to 10% and 30% to 40% slices
+ perf report --time 0%-10%,30%-40%
+
--itrace::
Options for decoding instruction tracing data. The options are:

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index f9dff65..4776f85 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -51,6 +51,8 @@
#include <sys/stat.h>
#include <unistd.h>

+#define PTIME_RANGE_MAX 10
+
struct report {
struct perf_tool tool;
struct perf_session *session;
@@ -69,6 +71,8 @@ struct report {
const char *symbol_filter_str;
const char *time_str;
struct perf_time_interval ptime;
+ struct perf_time_interval ptime_range[PTIME_RANGE_MAX];
+ int range_num;
float min_percent;
u64 nr_entries;
u64 queue_size;
@@ -185,8 +189,11 @@ static int process_sample_event(struct perf_tool *tool,
};
int ret = 0;

- if (perf_time__skip_sample(&rep->ptime, sample->time))
+ if (perf_time__skip_sample(&rep->ptime, sample->time) ||
+ perf_time__ranges_skip_sample(rep->ptime_range, rep->range_num,
+ sample->time)) {
return 0;
+ }

if (machine__resolve(machine, &al, sample) < 0) {
pr_debug("problem processing %d event, skipping it.\n",
@@ -1074,7 +1081,20 @@ int cmd_report(int argc, const char **argv)
goto error;

if (perf_time__parse_str(&report.ptime, report.time_str) != 0) {
- pr_err("Invalid time string\n");
+ report.range_num = perf_time__percent_parse_str(
+ report.ptime_range, PTIME_RANGE_MAX,
+ report.time_str,
+ session->evlist->first_sample_time,
+ session->evlist->last_sample_time);
+
+ if (report.range_num < 0) {
+ pr_err("Invalid time string\n");
+ return -EINVAL;
+ }
+ }
+
+ if (report.range_num > 0 && perf_data_file__is_pipe(session->file)) {
+ pr_err("Time percent range is not supported in pipe\n");
return -EINVAL;
}

--
2.7.4
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