perf_counter tools: increase cpu-cycles again

Commit b7368fdd7d decreased the CPU cycles interval 100-fold, but
this is causig kerneltop failures on my Nehalem box:

 aldebaran:/home/mingo/linux/linux/Documentation/perf_counter>
 ./kerneltop
 KernelTop refresh period: 2 seconds
 ERROR: failed to keep up with mmap data

10,000 cycles is way too short.

What we should do instead on mostly-idle systems is some sort of
read/poll timeout, so that we display something every 2 seconds
for sure.

Cc: Wu Fengguang <fengguang.wu@intel.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/Documentation/perf_counter/kerneltop.c b/Documentation/perf_counter/kerneltop.c
index 8f9a303f28d8dfaf1342062920a8b8f050468b37..2ab29b5e32e8d8258eb97ee1341ddffe32e41c99 100644 (file)
--- a/Documentation/perf_counter/kerneltop.c
+++ b/Documentation/perf_counter/kerneltop.c
@@ -212,7 +212,7 @@ struct source_line {
 
 
 const unsigned int default_count[] = {
-         10000,
+       1000000,
        1000000,
          10000,
          10000,