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update sysctl

#!/bin/sh
#
# elwix sysctl.conf
#
# $Id: sysctl.conf,v 1.9.2.5 2017/06/29 22:17:27 misho Exp $

sysctl -w kern.coredump=0
sysctl -w debug.debugger_on_panic=0
sysctl -w net.bpf.zerocopy_enable=1
sysctl -w net.bpf.optimize_writers=1
sysctl -w kern.ipc.somaxconn=1024
sysctl -w kern.eventtimer.periodic=1
sysctl -w net.route.netisr_maxqlen=2048
sysctl -w net.inet.ip.redirect=0
sysctl -w net.inet.ip.forwarding=1
sysctl -w net.inet.icmp.reply_from_interface=1
sysctl -w net.inet.tcp.rfc1323=1
sysctl -w net.inet.tcp.ecn.enable=1
sysctl -w net.inet6.ip6.forwarding=1
sysctl -w net.inet6.ip6.accept_rtadv=0
sysctl -w net.inet6.ip6.no_radr=0
sysctl -w kern.maxfilesperproc=4096
#sysctl -w kern.maxfiles=65536
#sysctl -w kern.ipc.maxsockets=65536
#sysctl -w kern.ipc.maxsockbuf=16777216
#sysctl -w kern.ipc.maxpipekva=16777216
#sysctl -w net.graph.maxdgram=131072
#sysctl -w net.graph.recvspace=131072
# Sendmsg() cat't send messages more than maxdgram length.
# Default value causes routing software to fail with OSPF if jumbo frames is turned on.
sysctl -w net.inet.raw.maxdgram=16384
sysctl -w net.inet.raw.recvspace=16384
# Current CPU can manage a lot's more of interrupts than default (1000)
# The 9000 value was found in /usr/src/sys/dev/ixgbe/README
sysctl -w hw.intr_storm_threshold=9000

sysctl -w kern.random.harvest.mask=351

# Improve a lot's the polling performance
# Enable idle_poll
#sysctl -w kern.polling.idle_poll=1
# The default value of 150 was for FastEthernet:
#sysctl -w kern.polling.burst_max=20000
#sysctl -w kern.polling.each_burst=50
# For a router, don't need to share 50/50 with user process
#sysctl -w kern.polling.user_frac=30

#sysctl -w hw.ath.bstuck=8
#net.inet.tcp.mssdflt=1452
#net.inet.tcp.hostcache.expire=1
#dev.ath.0.hal.ar5416_biasadj=1

#Power save: Disable power for device with no driver loaded
sysctl -w hw.pci.do_power_nodriver=3

# blackhole(8)
# Disable this feature because prevent traceroute to works correctly
#sysctl -w net.inet.tcp.blackhole=2
#sysctl -w net.inet.udp.blackhole=1
# prevent users from seeing information about processes that
# are being run under another UID.
#sysctl -w security.bsd.see_other_uids=0
#sysctl -w security.bsd.see_other_gids=0
# Prevent some potential exploit
#sysctl -w security.bsd.unprivileged_proc_debug=0

# Intel NIC tunning
#sysctl -w hw.em.rx_process_limit=-1
#sysctl -w hw.em.txd=2048
#sysctl -w hw.em.rxd=048

#sysctl -w hw.igb.rx_process_limit=-1
#sysctl -w hw.igb.txd=2048
#sysctl -w hw.igb.rxd=048
#sysctl -w hw.igb.max_interrupt_rate=16000