Re: [PATCH 1/4] perf_event_open.2 PERF_COUNT_SW_DUMMY support

["Michael Kerrisk (man-pages)" <mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

On 11/07/13 07:28, Vince Weaver wrote:
> 
> Support for the PERF_COUNT_SW_DUMMY event type was added in Linux 3.12.

Thanks, Vince. Applied.

Cheers,

Michael


> Signed-off-by: Vince Weaver <vincent.weaver-e7X0jjDqjFGHXe+LvDLADg@public.gmane.org>
> 
> diff --git a/man2/perf_event_open.2 b/man2/perf_event_open.2
> index 4ff9690..a443b6e 100644
> --- a/man2/perf_event_open.2
> +++ b/man2/perf_event_open.2
> @@ -468,6 +468,13 @@ This counts the number of emulation faults.
>  The kernel sometimes traps on unimplemented instructions
>  and emulates them for user space.
>  This can negatively impact performance.
> +.TP
> +.BR PERF_COUNT_SW_DUMMY " (Since Linux 3.12)"
> +This is a placeholder event that counts nothing.
> +Informational sample record types such as mmap or comm
> +must be associated with an active event.
> +This dummy event allows gathering such records without requiring
> +a counting event.
>  .RE
>  
>  .RS
> 


-- 
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
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