perf report: Add --comms parameter

So that we can filter by comm. Symbols in other comms won't be
accounted for.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1246399282-20934-3-git-send-email-acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

2 files changed, 27 insertions, 10 deletions

diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt
index 13d85ca8c914..4c44ef1747b9 100644
--- a/tools/perf/Documentation/perf-report.txt
+++ b/tools/perf/Documentation/perf-report.txt
@@ -24,6 +24,10 @@ OPTIONS
 --dsos=::
         Only consider symbols in these dsos. CSV that understands
         file://filename entries.
+-C::
+--comms=::
+        Only consider symbols in these comms. CSV that understands
+        file://filename entries.
 
 SEE ALSO
 --------
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 7c6b6e776718..8143477b7ef7 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -33,8 +33,8 @@ static char		*vmlinux = NULL;
 
 static char             default_sort_order[] = "comm,dso";
 static char             *sort_order = default_sort_order;
-static char             *dso_list_str;
-static struct strlist   *dso_list;
+static char             *dso_list_str, *comm_list_str;
+static struct strlist   *dso_list, *comm_list;
 
 static int              input;
 static int              show_mask = SHOW_KERNEL | SHOW_USER | SHOW_HV;
@@ -240,7 +240,7 @@ static u64 vdso__map_ip(struct map *map, u64 ip)
 
 static inline int is_anon_memory(const char *filename)
 {
-     return strcmp(filename, "//anon") == 0;
+        return strcmp(filename, "//anon") == 0;
 }
 
 static struct map *map__new(struct mmap_event *event)
@@ -1253,6 +1253,9 @@ process_sample_event(event_t *event, unsigned long offset, unsigned long head)
                 return -1;
         }
 
+        if (comm_list && !strlist__has_entry(comm_list, thread->comm))
+                return 0;
+
         if (event->header.misc & PERF_EVENT_MISC_KERNEL) {
                 show = SHOW_KERNEL;
                 level = 'k';
@@ -1667,6 +1670,8 @@ static const struct option options[] = {
         OPT_BOOLEAN('c', "callchain", &callchain, "Display callchains"),
         OPT_STRING('d', "dsos", &dso_list_str, "dso[,dso...]",
                    "only consider symbols in these dsos"),
+        OPT_STRING('C', "comms", &comm_list_str, "comm[,comm...]",
+                   "only consider symbols in these comms"),
         OPT_END()
 };
 
@@ -1685,6 +1690,19 @@ static void setup_sorting(void)
         free(str);
 }
 
+static void setup_list(struct strlist **list, const char *list_str,
+                       const char *list_name)
+{
+        if (list_str) {
+                *list = strlist__new(true, list_str);
+                if (!*list) {
+                        fprintf(stderr, "problems parsing %s list\n",
+                                list_name);
+                        exit(129);
+                }
+        }
+}
+
 int cmd_report(int argc, const char **argv, const char *prefix)
 {
         symbol__init();
@@ -1706,13 +1724,8 @@ int cmd_report(int argc, const char **argv, const char *prefix)
         if (argc)
                 usage_with_options(report_usage, options);
 
-        if (dso_list_str) {
-                dso_list = strlist__new(true, dso_list_str);
-                if (!dso_list) {
-                        fprintf(stderr, "problems parsing dso list\n");
-                        exit(129);
-                }
-        }
+        setup_list(&dso_list, dso_list_str, "dso");
+        setup_list(&comm_list, comm_list_str, "comm");
 
         setup_pager();