Commit d938f511 authored by Mike Hibler's avatar Mike Hibler

Sync up with FreeBSD 10 version.

parent 4b907b05
......@@ -12,21 +12,31 @@ beastie_disable="YES"
hw.memtest.tests=0
#
# ixgbe driver will throttle back number of rx queues if not enough
# nmbclusters; i.e., less than min(cores,8) * ports_on_card * ring_bufs,
# which for the Utah d820s is 8 * 2 * 2048 == 32768. So we set nmbclusters
# to that value here (and set the other nmb* values as the kernel would
# based on that value). Note that it is not too much larger than the default
# the kernel would calculate 25600 (which is based on "maxusers").
# Some drivers, most notably the Intel 10Gb "ixgbe" driver and newer 1Gb
# drivers, are very liberal with their mbuf allocation for RX buffers.
# The ixgbe driver in particular wants to allocate up to 2048 buffers
# per interface per CPU core (up to 8). On the Utah d820 nodes that is
# 2048 * 4 * 8 == 65536 mbufs.
#
# These values will get re-adjusted in the Emulab startup scripts to a
# more appropriate value based on the size of RAM and total number of
# This can cause dhclient to fail when it fires up all interfaces at once
# and the kernel runs out of mbufs.
#
# At Utah we avoid this by not dhcp'ing on the "ix" interfaces (see
# /etc/rc.d/netif-emulab) because they are never the control net. But if
# you have a 10Gb control net, or some other interface that allocates
# excessive mbufs, you may need to try the following settings or something
# even larger. Note that the relationship between the four values is the
# same as what FreeBSD uses for the defaults; i.e., each value is half the
# preceding value.
#
# Someday, these values will get re-adjusted in the Emulab startup scripts
# to a more appropriate value based on the size of RAM and total number of
# interfaces.
#
kern.ipc.nmbclusters=32768
kern.ipc.nmbjumbop=16384
kern.ipc.nmbclusters=65536
kern.ipc.nmbjumbop=32768
kern.ipc.nmbjumbo16=16384
kern.ipc.nmbjumbo9=8192
kern.ipc.nmbjumbo16=4096
# force module path, our pxeboot can mess it up
module_path="/boot/kernel;/boot/modules"
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