From: Ingo Molnar <mingo@elte.hu>
Date: Mon, 23 Mar 2009 21:29:50 +0000 (+0100)
Subject: perf_counter tools: increase cpu-cycles again
X-Git-Tag: firefly_0821_release~13973^2~441
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=81cdbe0509542324ad7d3282ab67c2b6716df663;p=firefly-linux-kernel-4.4.55.git

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 8f9a303f28d8..2ab29b5e32e8 100644
--- 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,