perf report: Generalize perf_session__fprintf_hists()

Pull it out of builtin-report - further changes will be made and it
will then be reusable in 'perf diff' as well.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1260914682-29652-4-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 29 insertions, 1 deletions

diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index bf491fda1f47..bb0fd6da2d56 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -189,13 +189,41 @@ void event__synthesize_threads(int (*process)(event_t *event,
         closedir(proc);
 }
 
+static void thread__comm_adjust(struct thread *self)
+{
+        char *comm = self->comm;
+
+        if (!symbol_conf.col_width_list_str && !symbol_conf.field_sep &&
+            (!symbol_conf.comm_list ||
+             strlist__has_entry(symbol_conf.comm_list, comm))) {
+                unsigned int slen = strlen(comm);
+
+                if (slen > comms__col_width) {
+                        comms__col_width = slen;
+                        threads__col_width = slen + 6;
+                }
+        }
+}
+
+static int thread__set_comm_adjust(struct thread *self, const char *comm)
+{
+        int ret = thread__set_comm(self, comm);
+
+        if (ret)
+                return ret;
+
+        thread__comm_adjust(self);
+
+        return 0;
+}
+
 int event__process_comm(event_t *self, struct perf_session *session)
 {
         struct thread *thread = perf_session__findnew(session, self->comm.pid);
 
         dump_printf(": %s:%d\n", self->comm.comm, self->comm.pid);
 
-        if (thread == NULL || thread__set_comm(thread, self->comm.comm)) {
+        if (thread == NULL || thread__set_comm_adjust(thread, self->comm.comm)) {
                 dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
                 return -1;
         }