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Re: [PATCH][manpages 1/2] perf_event_open.2: Document PERF_EVENT_IOC_PAUSE_OUTPUT

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  Re: [PATCH][manpages 1/2] perf_event_open.2: Document  PERF_EVENT_IOC_PAUSE_OUTPUT "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> - 2016-10-21 11:00 +0200
    Re: [PATCH][manpages 1/2] perf_event_open.2: Document  PERF_EVENT_IOC_PAUSE_OUTPUT Vince Weaver <vincent.weaver@maine.edu> - 2016-10-21 16:40 +0200
      Re: [PATCH][manpages 1/2] perf_event_open.2: Document PERF_EVENT_IOC_PAUSE_OUTPUT "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> - 2016-10-21 17:00 +0200

#1505598 — Re: [PATCH][manpages 1/2] perf_event_open.2: Document PERF_EVENT_IOC_PAUSE_OUTPUT

Thanks for this patch, Wangnan.

Vince, do you have any comments?

Cheers,

Michael


On 03/28/2016 12:15 PM, Wang Nan wrote:
> Signed-off-by: Wang Nan <wangnan0@huawei.com>
> ---
>  man2/perf_event_open.2 | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/man2/perf_event_open.2 b/man2/perf_event_open.2
> index c90fc51..b232cba 100644
> --- a/man2/perf_event_open.2
> +++ b/man2/perf_event_open.2
> @@ -2719,6 +2719,17 @@ The argument is a BPF program file descriptor that was created by
>  a previous
>  .BR bpf (2)
>  system call.
> +.TP
> +.BR PERF_EVENT_IOC_PAUSE_OUTPUT " (since Linux 4.6)"
> +.\" commit ? (http://lkml.kernel.org/g/1459147292-239310-2-git-send-email-wangnan0@huawei.com)
> +This allows pausing and resuming the event's ring-buffer. A
> +paused ring-buffer does not prevent samples generation, but simply
> +discards them. The discarded samples are considered lost, causes
> +.BR PERF_RECORD_LOST
> +to be generated when possible.
> +
> +The argument is an integer. Nonzero value pauses the ring-buffer,
> +zero value resumes the ring-buffer.
>  .SS Using prctl
>  A process can enable or disable all the event groups that are
>  attached to it using the
> 


-- 
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/

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#1506005

On Fri, 21 Oct 2016, Michael Kerrisk (man-pages) wrote:

> Thanks for this patch, Wangnan.
> 
> Vince, do you have any comments?
> 

I was catching up chronologically and was still at 4.4, and this was 
still in my queue as a 4.6 change.  I think I thought the patches looked 
good at the time, but I'll revisit them (and write some sample code to 
test out the interface) and get back to you soon.

Vince

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#1506035 — Re: [PATCH][manpages 1/2] perf_event_open.2: Document PERF_EVENT_IOC_PAUSE_OUTPUT

Hi Vince,

On 21 October 2016 at 16:37, Vince Weaver <vincent.weaver@maine.edu> wrote:
> On Fri, 21 Oct 2016, Michael Kerrisk (man-pages) wrote:
>
>> Thanks for this patch, Wangnan.
>>
>> Vince, do you have any comments?
>>
>
> I was catching up chronologically and was still at 4.4, and this was
> still in my queue as a 4.6 change.  I think I thought the patches looked
> good at the time, but I'll revisit them (and write some sample code to
> test out the interface) and get back to you soon.

Note that Wang Nan sent out new patches today -- not sure if there
were any changes though.

Cheers,

Michael


-- 
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/

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