From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael Kerrisk (man-pages)" Subject: Re: [patch] perf_event_open.2: PERF_RECORD_LOST_SAMPLES record type Date: Mon, 17 Oct 2016 08:46:10 +0200 Message-ID: <46a73e4c-1f0f-e14c-391c-e865f52ff9be@gmail.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-man-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Vince Weaver Cc: mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, linux-man-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Kan Liang , Peter Zijlstra , Ingo Molnar , Stephane Eranian List-Id: linux-man@vger.kernel.org Hello Vince, On 10/16/2016 04:02 AM, Vince Weaver wrote: > > Linux 4.2 added a new record type: PERF_RECORD_LOST_SAMPLES > It is generated when hardware samples (currently only Intel PEBS) > are lost. Thanks! Applied! Cheers, Michael > Signed-off-by: Vince Weaver > > diff --git a/man2/perf_event_open.2 b/man2/perf_event_open.2 > index 9f33122..a47df2d 100644 > --- a/man2/perf_event_open.2 > +++ b/man2/perf_event_open.2 > @@ -2551,6 +2551,25 @@ process ID of the thread starting an instruction trace. > .I tid > thread ID of the thread starting an instruction trace. > .RE > +.TP > +.BR PERF_RECORD_LOST_SAMPLES " (since Linux 4.2)" > +\" f38b0dbb491a6987e198aa6b428db8692a6480f8 > +When using hardware sampling (such as Intel PEBS) this record > +indicates some number of samples may have been lost. > + > +.in +4n > +.nf > +struct { > + struct perf_event_header header; > + u64 lost; > + struct sample_id sample_id; > +}; > +.fi > +.RS > +.TP > +.I lost > +the number of potentially lost samples. > +.RE > .RE > .SS Overflow handling > Events can be set to notify when a threshold is crossed, > -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/ -- 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