On 07/23/2015 07:11 PM, Vince Weaver wrote: > > This manpage patch relates to the addition of the data_offset > and data_size fields to the perf_event mmap buffer, as added > in the following commit:
Thanks, Vince. Applied. Cheers, Michael > commit e8c6deac69629c0cb97c3d3272f8631ef17f8f0f > Author: Alexander Shishkin <[email protected]> > > perf: Add data_{offset,size} to user_page > > Signed-off-by: Alexander Shishkin <[email protected]> > Signed-off-by: Peter Zijlstra (Intel) <[email protected]> > Cc: Borislav Petkov <[email protected]> > Cc: Frederic Weisbecker <[email protected]> > Cc: H. Peter Anvin <[email protected]> > Cc: Kaixu Xia <[email protected]> > Cc: Linus Torvalds <[email protected]> > Cc: Mike Galbraith <[email protected]> > Cc: Paul Mackerras <[email protected]> > Cc: Robert Richter <[email protected]> > Cc: Stephane Eranian <[email protected]> > Cc: Thomas Gleixner <[email protected]> > Cc: [email protected] > Cc: [email protected] > Cc: [email protected] > Cc: [email protected] > Cc: [email protected] > Link: > http://lkml.kernel.org/r/1421237903-181015-2-git-send-email-alexander.shish...@linux.intel.com > Signed-off-by: Ingo Molnar <[email protected]> > > > Signed-off-by: Vince Weaver <[email protected]> > > diff --git a/man2/perf_event_open.2 b/man2/perf_event_open.2 > index 09eda9a..a3bebaa 100644 > --- a/man2/perf_event_open.2 > +++ b/man2/perf_event_open.2 > @@ -1414,6 +1414,9 @@ struct perf_event_mmap_page { > __u64 __reserved[120]; /* Pad to 1k */ > __u64 data_head; /* head in the data section */ > __u64 data_tail; /* user-space written tail */ > + __u64 data_offset; /* where the buffer starts */ > + __u64 data_size; /* data buffer size */ > + > } > .fi > .in > @@ -1630,6 +1633,16 @@ the > .I data_tail > value should be written by user space to reflect the last read data. > In this case, the kernel will not overwrite unread data. > +.TP > +.IR data_offset " (since Linux 4.1)" > +.\" commit e8c6deac69629c0cb97c3d3272f8631ef17f8f0f > +Contains the offset of the location in the mmap buffer > +where perf sample data begins. > +.TP > +.IR data_size " (since Linux 4.1)" > +.\" commit e8c6deac69629c0cb97c3d3272f8631ef17f8f0f > +Contains the size of the perf sample region within > +the mmap buffer. > .PP > The following 2^n ring-buffer pages have the layout described below. > > -- 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-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
