[src/trunk]: src/share/man/man4 PR/35795: Greg A. Woods: bge(4) doesn't descr...

[elad <elad%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/f65cd68a1b0b
branches:  trunk
changeset: 747646:f65cd68a1b0b
user:      elad <elad%NetBSD.org@localhost>
date:      Sat Sep 26 04:51:21 2009 +0000

description:
PR/35795: Greg A. Woods: bge(4) doesn't describe the sysctl it uses

Use a slightly adjusted version of the diff in the PR. For proper credits,
the information in the added bit comes from a posting by Jonathan Stone.

diffstat:

 share/man/man4/bge.4 |  16 ++++++++++++++--
 1 files changed, 14 insertions(+), 2 deletions(-)

diffs (37 lines):

diff -r 6bda6a3563ba -r f65cd68a1b0b share/man/man4/bge.4
--- a/share/man/man4/bge.4      Sat Sep 26 04:43:48 2009 +0000
+++ b/share/man/man4/bge.4      Sat Sep 26 04:51:21 2009 +0000
@@ -1,4 +1,4 @@
-.\"    $NetBSD: bge.4,v 1.10 2008/08/25 08:23:00 cegger Exp $
+.\"    $NetBSD: bge.4,v 1.11 2009/09/26 04:51:21 elad Exp $
 .\"
 .\" Copyright (c) 2003 The NetBSD Foundation, Inc.
 .\" All rights reserved.
@@ -27,7 +27,7 @@
 .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 .\" POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd August 25, 2008
+.Dd September 26, 2009
 .Dt BGE 4
 .Os
 .Sh NAME
@@ -68,6 +68,18 @@
 See
 .Xr ifconfig 8
 for information on how to enable this feature.
+.Pp
+The level of interrupt mitigation for received packets can be adjusted
+with the
+.Li hw.bge.rx_lvl
+.Xr sysctl 8
+control.
+A value of 1 yields a
+.Nm
+interrrupt for every two full-sized Ethernet frames.
+Each increment of the value will, roughly, halve receive interrupt rate,
+up to a maximum of 5, which interrupts about every 30 to 40 full-sized
+TCP segments.
 .Sh SEE ALSO
 .Xr arp 4 ,
 .Xr bce 4 ,