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perf report: Support time percent and multiple time ranges

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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%

Changelog:

v6: Fix the merge issue with latest perf/core branch.
    No functional changes.

v5: Add checking of first/last sample time to detect if it's recorded
    in perf.data. If it's not recorded, returns error message to user.

v4: Remove perf_time__skip_sample, only uses perf_time__ranges_skip_sample

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>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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/1512738826-2628-6-git-send-email-yao.jin@linux.intel.com
[ Add missing colons at end of examples in the man page ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jin Yao 2017-12-08 21:13:45 +08:00 committed by Arnaldo Carvalho de Melo
parent 9a9b8b4b22
commit 5b969bc766
2 changed files with 46 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

20
tools/perf/Documentation/perf-report.txt
View file

@ -402,6 +402,26 @@ 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 multiple 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:

31
tools/perf/builtin-report.c
View file

@ -52,6 +52,8 @@
#include <sys/stat.h>
#include <unistd.h>
#define PTIME_RANGE_MAX 10
struct report {
struct perf_tool tool;
struct perf_session *session;
@ -69,7 +71,8 @@ struct report {
const char *cpu_list;
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;
@ -202,8 +205,10 @@ static int process_sample_event(struct perf_tool *tool,
};
int ret = 0;
if (perf_time__skip_sample(&rep->ptime, sample->time))
if (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",
@ -1093,9 +1098,25 @@ int cmd_report(int argc, const char **argv)
if (symbol__init(&session->header.env) < 0)
goto error;
if (perf_time__parse_str(&report.ptime, report.time_str) != 0) {
pr_err("Invalid time string\n");
return -EINVAL;
if (perf_time__parse_str(report.ptime_range, report.time_str) != 0) {
if (session->evlist->first_sample_time == 0 &&
session->evlist->last_sample_time == 0) {
pr_err("No first/last sample time in perf data\n");
return -EINVAL;
}
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;
}
} else {
report.range_num = 1;
}
sort__setup_elide(stdout);