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 <wangn...@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-wangn...@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/
