perf_counter: tools: report: Add comm sorting

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: John Kacur <jkacur@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
LKML-Reference: <20090527182101.129302022@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 30 insertions, 0 deletions

diff --git a/Documentation/perf_counter/builtin-report.c b/Documentation/perf_counter/builtin-report.c
index 982abce0e7c1..a634022bae07 100644
--- a/Documentation/perf_counter/builtin-report.c
+++ b/Documentation/perf_counter/builtin-report.c
@@ -732,6 +732,35 @@ static struct sort_entry sort_thread = {
 };
 
 static int64_t
+sort__comm_cmp(struct hist_entry *left, struct hist_entry *right)
+{
+        char *comm_l = left->thread->comm;
+        char *comm_r = right->thread->comm;
+
+        if (!comm_l || !comm_r) {
+                if (!comm_l && !comm_r)
+                        return 0;
+                else if (!comm_l)
+                        return -1;
+                else
+                        return 1;
+        }
+
+        return strcmp(comm_l, comm_r);
+}
+
+static size_t
+sort__comm_print(FILE *fp, struct hist_entry *self)
+{
+        return fprintf(fp, "%20s ", self->thread->comm ?: "<unknown>");
+}
+
+static struct sort_entry sort_comm = {
+        .cmp    = sort__comm_cmp,
+        .print  = sort__comm_print,
+};
+
+static int64_t
 sort__sym_cmp(struct hist_entry *left, struct hist_entry *right)
 {
         uint64_t ip_l, ip_r;
@@ -779,6 +808,7 @@ struct sort_dimension {
 
 static struct sort_dimension sort_dimensions[] = {
         { .name = "pid",        .entry = &sort_thread,  },
+        { .name = "comm",       .entry = &sort_comm,    },
         { .name = "symbol",     .entry = &sort_sym,     },
 };