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| author | Michael Kerrisk <mtk.manpages@gmail.com> | 2016-10-17 11:12:33 +0200 |
|---|---|---|
| committer | Michael Kerrisk <mtk.manpages@gmail.com> | 2016-10-17 11:17:42 +0200 |
| commit | 6831ba6b0f992a16b09bf0c8c9206afefa85e80c (patch) | |
| tree | d837357954513622a7bd03abc43e847fd9cfca0d | |
| parent | 4b3a5f018a0890e99dd10ad0ad00a183a48e23e9 (diff) | |
| download | man-pages-6831ba6b0f992a16b09bf0c8c9206afefa85e80c.tar.gz | |
perf_event_open.2: Clarify the use of signals for capturing overflow events
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
| -rw-r--r-- | man2/perf_event_open.2 | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/man2/perf_event_open.2 b/man2/perf_event_open.2 index 774c133d04..8a0766d820 100644 --- a/man2/perf_event_open.2 +++ b/man2/perf_event_open.2 @@ -2585,10 +2585,13 @@ event file descriptor with .BR select (2), or .BR epoll (7). -Alternately, a SIGIO signal handler can be created and -the event configured with -.BR fcntl (2) -to generate SIGIO signals. +Alternatively, the overflow events can be captured via sa signal handler, +by enabling I/O signaling on the file descriptor; see the discussion of the +.BF F_SETOWN +and +.BR F_SETSIG +operations in +.BR fcntl (2). Overflows are generated only by sampling events .RI ( sample_period |