perf record, top: Implement --freq

Support frequency-based profiling and make it the default.

(Also add a Hz printout in perf top.)

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 9 insertions, 4 deletions

diff --git a/Documentation/perf_counter/builtin-top.c b/Documentation/perf_counter/builtin-top.c
index 28cbde4b6e8..2fee5951b23 100644
--- a/Documentation/perf_counter/builtin-top.c
+++ b/Documentation/perf_counter/builtin-top.c
@@ -74,8 +74,8 @@ static int			nr_cpus				=  0;
 static unsigned int             realtime_prio                   =  0;
 static int                      group                           =  0;
 static unsigned int             page_size;
-static unsigned int             mmap_pages                      =  16;
-static int                      freq                            = 0;
+static unsigned int             mmap_pages                      = 16;
+static int                      freq                            =  0;
 
 static char                     *sym_filter;
 static unsigned long            filter_start;
@@ -212,8 +212,13 @@ static void print_sym_table(void)
                 events_per_sec,
                 100.0 - (100.0*((events_per_sec-kevents_per_sec)/events_per_sec)));
 
-        if (nr_counters == 1)
-                printf("%d ", event_count[0]);
+        if (nr_counters == 1) {
+                printf("%d", event_count[0]);
+                if (freq)
+                        printf("Hz ");
+                else
+                        printf(" ");
+        }
 
         for (counter = 0; counter < nr_counters; counter++) {
                 if (counter)