From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wang Nan Subject: [PATCH][manpages 1/2] perf_event_open.2: Document PERF_EVENT_IOC_PAUSE_OUTPUT Date: Mon, 28 Mar 2016 10:15:47 +0000 Message-ID: <1459160147-240738-1-git-send-email-wangnan0@huawei.com> References: <1459147292-239310-2-git-send-email-wangnan0@huawei.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1459147292-239310-2-git-send-email-wangnan0-hv44wF8Li93QT0dZR+AlfA@public.gmane.org> Sender: linux-man-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org, vince-yfjdyHUqu3OsTnJN9+BGXg@public.gmane.org, mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-man-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, pi3orama-9Onoh4P/yGk@public.gmane.org, lizefan-hv44wF8Li93QT0dZR+AlfA@public.gmane.org, Wang Nan List-Id: linux-man@vger.kernel.org Signed-off-by: Wang Nan --- 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-hv44wF8Li93QT0dZR+AlfA@public.gmane.org) +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 -- 1.8.3.4 -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html