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| author | Ingo Molnar <mingo@elte.hu> | 2009-06-02 23:02:59 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-06-02 23:04:24 +0200 |
| commit | 3cf165fc2e7f221a7a95098b47eb990779e29f5f (patch) | |
| tree | 2719492950a0570d3a4f5bd3c3a5c92449665649 | |
| parent | abaff32a03e26e5d6674cb2a26ad882efe7493a3 (diff) | |
| download | lwn-3cf165fc2e7f221a7a95098b47eb990779e29f5f.tar.gz lwn-3cf165fc2e7f221a7a95098b47eb990779e29f5f.zip | |
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>
| -rw-r--r-- | Documentation/perf_counter/builtin-record.c | 4 |
1 files changed, 2 insertions, 2 deletions
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; |