From: Ingo Molnar <mingo@elte.hu>
Date: Tue, 2 Jun 2009 21:02:59 +0000 (+0200)
Subject: perf record: Increase mmap buffering default
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=3cf165fc2e7f221a7a95098b47eb990779e29f5f;p=linux-beck.git

perf record: Increase mmap buffering default

I've run into mmap overruns with the current 16 pages default,
increase it to 128 pages.

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

diff --git a/Documentation/perf_counter/builtin-record.c b/Documentation/perf_counter/builtin-record.c
index 19cba6b5ee9c..8feb1192e09e 100644
--- a/Documentation/perf_counter/builtin-record.c
+++ b/Documentation/perf_counter/builtin-record.c
@@ -19,9 +19,9 @@ static int			default_interval = 100000;
 static int			event_count[MAX_COUNTERS];
 
 static int			fd[MAX_NR_CPUS][MAX_COUNTERS];
-static int			nr_cpus				=  0;
+static int			nr_cpus				= 0;
 static unsigned int		page_size;
-static unsigned int		mmap_pages			= 16;
+static unsigned int		mmap_pages			= 128;
 static int			output;
 static const char		*output_name			= "perf.data";
 static int			group				= 0;