From: Namhyung Kim <namhyung....@lge.com>
The --time-filter option is for limiting samples within a range of
time. A time range looks like <time1>-<time2> and at most one of them
can be omitted. This can be useful when analyzing a part of a huge
data only.
Cc: Joonsoo Kim <iamjoonsoo....@lge.com>
Signed-off-by: Namhyung Kim <namhy...@kernel.org>
---
tools/perf/Documentation/perf-report.txt | 6 ++++++
tools/perf/builtin-report.c | 33 ++++++++++++++++++++++++++++++++
2 files changed, 39 insertions(+)
diff --git a/tools/perf/Documentation/perf-report.txt
b/tools/perf/Documentation/perf-report.txt
index 7d5f4f38aa52..67544c2d8e69 100644
--- a/tools/perf/Documentation/perf-report.txt
+++ b/tools/perf/Documentation/perf-report.txt
@@ -210,6 +210,12 @@ OPTIONS
Demangle symbol names to human readable form. It's enabled by default,
disable with --no-demangle.
+--time-filter::
+ Report samples within a range of time only. A time range can be given
+ like 'time1-time2' and treated as a start time and end time
+ respectively. The time format is like "<sec>.<usec>". Either of time1
+ or time2 can be omitted.
+
SEE ALSO
--------
linkperf:perf-stat[1], linkperf:perf-annotate[1]
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index d45bf9b0361d..2cd3f640cc4a 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -52,6 +52,7 @@ struct perf_report {
symbol_filter_t annotate_init;
const char *cpu_list;
const char *symbol_filter_str;
+ u64 time_start, time_end;
DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
};
@@ -311,6 +312,12 @@ static int process_sample_event(struct perf_tool *tool,
if (rep->cpu_list && !test_bit(sample->cpu, rep->cpu_bitmap))
return 0;
+ if (rep->time_start && rep->time_start > sample->time)
+ return 0;
+
+ if (rep->time_end && rep->time_end < sample->time)
+ return 0;
+
if (sort__mode == SORT_MODE__BRANCH) {
if (perf_report__add_branch_hist_entry(tool, &al, sample,
evsel, machine)) {
@@ -700,6 +707,30 @@ parse_branch_mode(const struct option *opt __maybe_unused,
return 0;
}
+static int
+parse_time_filter(const struct option *opt, const char *str,
+ int unset __maybe_unused)
+{
+ struct perf_report *rep = opt->value;
+ char *sep;
+
+ sep = strchr(str, '-');
+ if (sep == NULL || sep[1] == '\0') {
+ rep->time_start = parse_nsec_time(str);
+ return 0;
+ } else if (sep == str) {
+ rep->time_end = parse_nsec_time(++str);
+ return 0;
+ }
+
+ *sep++ = '\0';
+
+ rep->time_start = parse_nsec_time(str);
+ rep->time_end = parse_nsec_time(sep);
+
+ return 0;
+}
+
int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
{
struct perf_session *session;
@@ -809,6 +840,8 @@ int cmd_report(int argc, const char **argv, const char
*prefix __maybe_unused)
OPT_BOOLEAN(0, "demangle", &symbol_conf.demangle,
"Disable symbol demangling"),
OPT_BOOLEAN(0, "mem-mode", &report.mem_mode, "mem access profile"),
+ OPT_CALLBACK(0, "time-filter", &report, "time[-time]",
+ "Only display entries in the time range",
parse_time_filter),
OPT_END()
};
--
1.7.11.7
--
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