lkml.org 
[lkml]   [2017]   [Sep]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v1 6/6] perf script: support time percent and multiple time ranges
Date
perf script 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 script --time 10%/1,10%/2

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

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
---
tools/perf/Documentation/perf-script.txt | 16 ++++++++++++++++
tools/perf/builtin-script.c | 21 ++++++++++++++++++---
2 files changed, 34 insertions(+), 3 deletions(-)

diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt
index 18dfcfa..f772f37 100644
--- a/tools/perf/Documentation/perf-script.txt
+++ b/tools/perf/Documentation/perf-script.txt
@@ -321,6 +321,22 @@ include::itrace.txt[]
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 script --time 10%/2
+
+ Select from 0% to 10% time slice
+ perf script --time 0%-10%
+
+ Select the first and second 10% time slices
+ perf script --time 10%/1,10%/2
+
+ Select from 0% to 10% and 30% to 40% slices
+ perf script --time 0%-10%,30%-40%
+
--max-blocks::
Set the maximum number of program blocks to print with brstackasm for
each sample.
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 3d4c3b5..ddb9516 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -1332,6 +1332,8 @@ static void print_sample_synth(struct perf_sample *sample,
}
}

+#define PTIME_RANGE_MAX 10
+
struct perf_script {
struct perf_tool tool;
struct perf_session *session;
@@ -1345,6 +1347,8 @@ struct perf_script {
int name_width;
const char *time_str;
struct perf_time_interval ptime;
+ struct perf_time_interval ptime_range[PTIME_RANGE_MAX];
+ int range_num;
};

static int perf_evlist__max_name_len(struct perf_evlist *evlist)
@@ -1537,8 +1541,11 @@ static int process_sample_event(struct perf_tool *tool,
struct perf_script *scr = container_of(tool, struct perf_script, tool);
struct addr_location al;

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

if (debug_mode) {
if (sample->time < last_timestamp) {
@@ -3074,8 +3081,16 @@ int cmd_script(int argc, const char **argv)

/* needs to be parsed after looking up reference time */
if (perf_time__parse_str(&script.ptime, script.time_str) != 0) {
- pr_err("Invalid time string\n");
- return -EINVAL;
+ script.range_num = perf_time__percent_parse_str(
+ script.ptime_range, PTIME_RANGE_MAX,
+ script.time_str,
+ session->first_sample_time,
+ session->last_sample_time);
+
+ if (script.range_num < 0) {
+ pr_err("Invalid time string\n");
+ return -EINVAL;
+ }
}

err = __cmd_script(&script);
--
2.7.4
\
 
 \ /
  Last update: 2017-09-20 09:18    [W:0.064 / U:4.716 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site