[PATCH v2 3/3] perf diff: Support --pid/--tid filter options

Jin Yao
2019-02-26T04:20:26Z

For better filtering support for perf diff, it would be useful to
add --pid and --tid filter options.

For example,
perf diff --tid 13965

It only diff the samples for thread 13965.

v2:
---
No functional change.

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
---
tools/perf/Documentation/perf-diff.txt | 6 ++++++
tools/perf/builtin-diff.c | 4 ++++
2 files changed, 10 insertions(+)

diff --git a/tools/perf/Documentation/perf-diff.txt b/tools/perf/Documentation/perf-diff.txt
index ed13b3f..83c9496 100644
--- a/tools/perf/Documentation/perf-diff.txt
+++ b/tools/perf/Documentation/perf-diff.txt
@@ -164,6 +164,12 @@ OPTIONS
CPUs are specified with -: 0-2. Default is to report samples on all
CPUs.

+--pid=::
+ Only diff samples for given process ID (comma separated list).
+
+--tid=::
+ Only diff samples for given thread ID (comma separated list).
+
COMPARISON
----------
The comparison is governed by the baseline file. The baseline perf.data
diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index 78d0aa4..ce06b38 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -1006,6 +1006,10 @@ static const struct option options[] = {
OPT_STRING(0, "time", &pdiff.time_str, "str",
"Time span (time percent or absolute timestamp)"),
OPT_STRING(0, "cpu", &cpu_list, "cpu", "list of cpus to profile"),
+ OPT_STRING(0, "pid", &symbol_conf.pid_list_str, "pid[,pid...]",
+ "only consider symbols in these pids"),
+ OPT_STRING(0, "tid", &symbol_conf.tid_list_str, "tid[,tid...]",
+ "only consider symbols in these tids"),
OPT_END()
};

--
2.7.4