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>

diff --git a/tools/perf/Documentation/perf-diff.txt b/tools/perf/Documentation/perf-diff.txt
index 8c2c229..da7809b 100644 (file)
--- 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 dfe6c76..6e79207 100644 (file)
--- 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()
 };