Messages in this thread Patch in this message | | | Date | Tue, 2 Jun 2009 22:32:15 GMT | From | tip-bot for Ingo Molnar <> | Subject | [tip:perfcounters/core] perf record: Increase mmap buffering default |
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Commit-ID: 3cf165fc2e7f221a7a95098b47eb990779e29f5f Gitweb: http://git.kernel.org/tip/3cf165fc2e7f221a7a95098b47eb990779e29f5f Author: Ingo Molnar <mingo@elte.hu> AuthorDate: Tue, 2 Jun 2009 23:02:59 +0200 Committer: Ingo Molnar <mingo@elte.hu> CommitDate: Tue, 2 Jun 2009 23:04:24 +0200
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>
--- 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 19cba6b..8feb119 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;
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