diff options
| -rw-r--r-- | sys/i386/conf/LINT | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/sys/i386/conf/LINT b/sys/i386/conf/LINT index 8d0291b95508..0cd25042870f 100644 --- a/sys/i386/conf/LINT +++ b/sys/i386/conf/LINT @@ -602,9 +602,13 @@ options TCP_DROP_SYNFIN #drop TCP packets with SYN+FIN options ICMP_BANDLIM # DUMMYNET enables the "dummynet" bandwidth limiter. You need -# IPFIREWALL as well. See the dummynet(4) manpage for more info. +# IPFIREWALL as well. See the dummynet(4) and ipfw(8) manpages for more info. +# When you run DUMMYNET it is advisable to also have "options HZ=1000" +# to achieve a smoother scheduling of the traffic. +# # BRIDGE enables bridging between ethernet cards -- see bridge(4). -# You can use IPFIREWALL and dummynet together with bridging. +# You can use IPFIREWALL and DUMMYNET together with bridging. +# options DUMMYNET options BRIDGE @@ -770,11 +774,12 @@ options _KPOSIX_VERSION=199309L # CLOCK OPTIONS # The granularity of operation is controlled by the kernel option HZ whose -# default value (100) means a granularity of 10ms. For an accurate simulation -# of high data rates it might be necessary to reduce the timer granularity to -# 1ms or less. Consider, however, that some interfaces using programmed I/O -# may require a considerable time to output packets. So, reducing the -# granularity too much might actually cause ticks to be missed thus reducing +# default value (100) means a granularity of 10ms (1s/HZ). +# Some subsystems, such as DUMMYNET or DEVICE_POLLING, might benefit from +# a smaller granularity such as 1ms or less. +# Consider, however, that reducing the granularity too much might +# cause excessive overhead in clock interrupt processing, +# potentially causing ticks to be missed and thus actually reducing # the accuracy of operation. options HZ=100 |