LDP
/
man-pages
mirror of https://github.com/mkerrisk/man-pages
0
1
Fork 0
Code Releases Activity

perf_event_open.2: Add possibility of EBUSY error 

Linux 4.1 added the possibility of perf_event_open() returning
EBUSY if an existing exclusive event controls the PMU.

This was introduced by the following commit:

	commit bed5b25ad9c8a2f5d735ef0bc746ec870c01c1b0
	Author: Alexander Shishkin <alexander.shishkin@linux.intel.com>
	Date:   Fri Jan 30 12:31:06 2015 +0200

	perf: Add a pmu capability for "exclusive" events

	Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
	Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
	Cc: Borislav Petkov <bp@alien8.de>
	Cc: Frederic Weisbecker <fweisbec@gmail.com>
	Cc: H. Peter Anvin <hpa@zytor.com>
	Cc: Kaixu Xia <kaixu.xia@linaro.org>
	Cc: Linus Torvalds <torvalds@linux-foundation.org>
	Cc: Mike Galbraith <efault@gmx.de>
	Cc: Paul Mackerras <paulus@samba.org>
	Cc: Robert Richter <rric@kernel.org>
	Cc: Stephane Eranian <eranian@google.com>
	Cc: Thomas Gleixner <tglx@linutronix.de>
	Cc: acme@infradead.org
	Cc: adrian.hunter@intel.com
	Cc: kan.liang@intel.com
	Cc: markus.t.metzger@intel.com
	Cc: mathieu.poirier@linaro.org

Signed-off-by: Vince Weaver <vincent.weaver@maine.edu>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Vince Weaver 2015-07-23 13:16:55 -04:00 committed by Michael Kerrisk
parent 562c69f66f
commit f27486cb80
1 changed files with 5 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
man2/perf_event_open.2
View File

@ -2911,6 +2911,11 @@ the cgroup file descriptor in
.I pid
is not valid.
.TP
.BR EBUSY " (since Linux 4.1)"
.\" bed5b25ad9c8a2f5d735ef0bc746ec870c01c1b0
Returned if another event already has exclusive
access to the PMU.
.TP
.B EFAULT
Returned if the
.I attr