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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>
This commit is contained in:
Ingo Molnar 2009-06-02 23:02:59 +02:00
parent abaff32a03
commit 3cf165fc2e
1 changed files with 2 additions and 2 deletions
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4
Documentation/perf_counter/builtin-record.c
View File

@ -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;