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Update man page for igb(4) with a little bit of information about

hw.igb.num_queues for those so inclined.

PR:		kern/177384
Submitted by:	hiren.panchasara@gmail.com
Reviewed by:	sbruno@
Approved by:	jfv@
Obtained from:	Yahoo! Inc.
MFC after:	2 weeks
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commit 2ca30a8c108d4e822c53fb9365399f844e2f944c 1 parent 20a2c3e
@seanbruno seanbruno authored
Showing with 8 additions and 2 deletions.
  1. +6 −1 share/man/man4/igb.4
  2. +2 −1  sys/dev/e1000/if_igb.c
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7 share/man/man4/igb.4
@@ -31,7 +31,7 @@
.\"
.\" $FreeBSD$
.\"
-.Dd May 12, 2012
+.Dd March 25, 2013
.Dt IGB 4
.Os
.Sh NAME
@@ -160,6 +160,11 @@ The minimum is 80, and the maximum is 4096.
.It Va hw.igb.enable_aim
If set to 1, enable Adaptive Interrupt Moderation.
The default is to enable Adaptive Interrupt Moderation.
+.It Va hw.igb.num_queues
+Numer of queues used for data transfer.
+If set to 0, number of queues will be configured
+automatically based on number of CPUs and max
+supported MSI-X messages on the device.
.It Va kern.ipc.nmbclusters
The maximum number of mbuf clusters allowed.
If the system has more than one igb card or jumbo frames are
View
3  sys/dev/e1000/if_igb.c
@@ -375,7 +375,8 @@ SYSCTL_INT(_hw_igb, OID_AUTO, header_split, CTLFLAG_RDTUN, &igb_header_split, 0,
/*
** This will autoconfigure based on
-** the number of CPUs if left at 0.
+** the number of CPUs and max supported MSI-X messages
+** if left at 0.
*/
static int igb_num_queues = 0;
TUNABLE_INT("hw.igb.num_queues", &igb_num_queues);
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