perf diff: Support --pid/--tid filter options

Using the existing symbol_conf.pid_list_str and symbol_conf.tid_list_str
logic.

For example:

  perf diff --tid 13965

It'll only diff the samples for thread 13965.

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Yao <yao.jin@intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1551791143-10334-4-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 10 insertions, 0 deletions

diff --git a/tools/perf/Documentation/perf-diff.txt b/tools/perf/Documentation/perf-diff.txt
index 8c2c229faf50..da7809b15cc9 100644
--- a/tools/perf/Documentation/perf-diff.txt
+++ b/tools/perf/Documentation/perf-diff.txt
@@ -168,6 +168,12 @@ 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 dfe6c7606f5a..6e7920793729 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -985,6 +985,10 @@ 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()
 };