94 lines
3.0 KiB
Bash
Executable File
94 lines
3.0 KiB
Bash
Executable File
#!/bin/sh
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#
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# Copyright (c) 2016 Babak Farrokhi. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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#
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# Suggest optimum value for kern.ipc.*
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# based on /sys/kern/kern_mbuf.c
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#
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MCLBYTES=2048
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MSIZE=256
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PHYSMEM=`sysctl -n hw.physmem`
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PAGE_SIZE=`sysctl -n hw.pagesize`
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VM_KMEM_SIZE=`sysctl -n vm.kmem_size`
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REALMEM=${VM_KMEM_SIZE}
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MAXMBUFMEM=`expr $REALMEM / 4 \* 3`
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MJUMPAGESIZE=$PAGE_SIZE
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MJUM9BYTES=`expr 9 \* 1024`
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MJUM16BYTES=`expr 16 \* 1024`
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NMBCLUSTERS=`expr $MAXMBUFMEM / $MCLBYTES / 4`
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NMBJUMBOP=`expr $MAXMBUFMEM / $MJUMPAGESIZE / 4`
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NMBJUMBO9=`expr $MAXMBUFMEM / $MJUM9BYTES / 6`
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NMBJUMBO16=`expr $MAXMBUFMEM / $MJUM16BYTES / 6`
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NMBUFS=`sysctl -n kern.ipc.nmbufs`
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NMMAX1=`expr $NMBCLUSTERS + $NMBJUMBOP + $NMBJUMBO9 + $NMBJUMBO16`
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NMMAX2=`expr $MAXMBUFMEM / $MSIZE / 5`
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if [ $NMMAX1 -gt $NMMAX2 ]; then
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NMBUFS=$NMMAX1
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else
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NMBUFX=$NMMAX2
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fi
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show()
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{
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echo "# `basename $0 ` suggested settings:"
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echo "kern.ipc.maxmbufmem=$MAXMBUFMEM"
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echo "kern.ipc.nmbclusters=$NMBCLUSTERS"
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echo "kern.ipc.nmbjumbop=$NMBJUMBOP"
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echo "kern.ipc.nmbjumbo9=$NMBJUMBO9"
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echo "kern.ipc.nmbjumbo16=$NMBJUMBO16"
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echo "kern.ipc.nmbufs=$NMBUFS"
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}
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compare()
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{
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echo "kern.ipc.maxmbufmem: `sysctl -n kern.ipc.maxmbufmem` (current)"
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echo " --> $MAXMBUFMEM (suggested)"
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echo "kern.ipc.nmbclusters: `sysctl -n kern.ipc.nmbclusters`"
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echo " --> $NMBCLUSTERS"
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echo "kern.ipc.nmbjumbop: `sysctl -n kern.ipc.nmbjumbop`"
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echo " --> $NMBJUMBOP"
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echo "kern.ipc.nmbjumbo9: `sysctl -n kern.ipc.nmbjumbo9`"
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echo " --> $NMBJUMBO9"
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echo "kern.ipc.nmbjumbo16: `sysctl -n kern.ipc.nmbjumbo16`"
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echo " --> $NMBJUMBO16"
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echo "kern.ipc.nmbufs: `sysctl -n kern.ipc.nmbufs`"
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echo " --> $NMBUFS"
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}
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if [ $# -gt 0 ]; then
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if [ $1 == '-c' ]; then
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compare
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exit 0
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fi
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fi
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show
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