diff options
| author | wollman <wollman@FreeBSD.org> | 1996-03-28 20:57:11 +0000 |
|---|---|---|
| committer | wollman <wollman@FreeBSD.org> | 1996-03-28 20:57:11 +0000 |
| commit | a2c6be4b6df720f741b15755ba49ed42c4bd05eb (patch) | |
| tree | ed027bfb3455842570c22f403ece1097ea0f5622 /share | |
| parent | d566ed5bd5f4560e1febe664ba06aef9c201554b (diff) | |
| download | FreeBSD-src-a2c6be4b6df720f741b15755ba49ed42c4bd05eb.zip FreeBSD-src-a2c6be4b6df720f741b15755ba49ed42c4bd05eb.tar.gz | |
Document the change in how the START and STOP ioctls operate
(counters can be started and stopped in numerical order brather
than all at once).
Diffstat (limited to 'share')
| -rw-r--r-- | share/man/man4/man4.i386/perfmon.4 | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/share/man/man4/man4.i386/perfmon.4 b/share/man/man4/man4.i386/perfmon.4 index e20679c..01c0ef7 100644 --- a/share/man/man4/man4.i386/perfmon.4 +++ b/share/man/man4/man4.i386/perfmon.4 @@ -26,7 +26,7 @@ .\" OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" -.\" $Id$ +.\" $Id: perfmon.4,v 1.1 1996/03/26 20:57:26 wollman Exp $ .Dd March 26, 1996 .Dt PERFMON 4 i386 .Os FreeBSD 2.2 @@ -119,9 +119,12 @@ returns the current configuration of the specified counter. .It Dv PMIOSTART .It Dv PMIOSTOP .Pq Li int -starts (stops) the specified counter. Currently, only a counter value of -.Dv PMC_ALL -is supported, as the hardware starts and stops the counters as a gang. +starts (stops) the specified counter. Due to hardware deficiencies, +counters must be started and stopped in numerical order. (That is to +say, counter 0 can never be stopped without first stopping counter 1.) +The driver will +.Em not +enforce this restriction (since it may not be present in future CPUs). .It Dv PMIORESET .Pq Li int reset the specified counter to zero. The counter should be stopped |
