https://0xfe.com.cn/post/6b78731.html
废话不多说：
其shell 脚本为：
#!/bin/bash
#
# Copyright (c) 2015, Intel Corporation
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# * Neither the name of Intel Corporation nor the names of its contributors
# may be used to endorse or promote products derived from this software
# without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# Affinitize interrupts to cores
#
# typical usage is (as root):
# set_irq_affinity -x local eth1 <eth2> <eth3>
#
# to get help:
# set_irq_affinity
usage()
{
echo
echo "Usage: $0 [-x|-X] {all|local|remote|one|custom} [ethX] <[ethY]>"
echo " options: -x Configure XPS as well as smp_affinity"
echo " options: -X Disable XPS but set smp_affinity"
echo " options: {remote|one} can be followed by a specific node number"
echo " Ex: $0 local eth0"
echo " Ex: $0 remote 1 eth0"
echo " Ex: $0 custom eth0 eth1"
echo " Ex: $0 0-7,16-23 eth0"
echo
exit 1
}
usageX()
{
echo "options -x and -X cannot both be specified, pick one"
exit 1
}
if [ "$1" == "-x" ]; then
XPS_ENA=1
shift
fi
if [ "$1" == "-X" ]; then
if [ -n "$XPS_ENA" ]; then
usageX
fi
XPS_DIS=2
shift
fi
if [ "$1" == -x ]; then
usageX
fi
if [ -n "$XPS_ENA" ] && [ -n "$XPS_DIS" ]; then
usageX
fi
if [ -z "$XPS_ENA" ]; then
XPS_ENA=$XPS_DIS
fi
num='^[0-9]+$'
# Vars
AFF=$1
shift
case "$AFF" in
remote) [[ $1 =~ $num ]] && rnode=$1 && shift ;;
one) [[ $1 =~ $num ]] && cnt=$1 && shift ;;
all) ;;
local) ;;
custom) ;;
[0-9]*) ;;
-h|--help) usage ;;
"") usage ;;
*) IFACES=$AFF && AFF=all ;; # Backwards compat mode
esac
# append the interfaces listed to the string with spaces
while [ "$#" -ne "0" ] ; do
IFACES+=" $1"
shift
done
# for now the user must specify interfaces
if [ -z "$IFACES" ]; then
usage
exit 1
fi
# support functions
set_affinity()
{
VEC=$core
if [ $VEC -ge 32 ]
then
MASK_FILL=""
MASK_ZERO="00000000"
let "IDX = $VEC / 32"
for ((i=1; i<=$IDX;i++))
do
MASK_FILL="${MASK_FILL},${MASK_ZERO}"
done
let "VEC -= 32 * $IDX"
MASK_TMP=$((1<<$VEC))
MASK=$(printf "%X%s" $MASK_TMP $MASK_FILL)
else
MASK_TMP=$((1<<$VEC))
MASK=$(printf "%X" $MASK_TMP)
fi
printf "%s" $MASK > /proc/irq/$IRQ/smp_affinity
printf "%s %d %s -> /proc/irq/$IRQ/smp_affinity\n" $IFACE $core $MASK
case "$XPS_ENA" in
1)
printf "%s %d %s -> /sys/class/net/%s/queues/tx-%d/xps_cpus\n" $IFACE $core $MASK $IFACE $((n-1))
printf "%s" $MASK > /sys/class/net/$IFACE/queues/tx-$((n-1))/xps_cpus
;;
2)
MASK=0
printf "%s %d %s -> /sys/class/net/%s/queues/tx-%d/xps_cpus\n" $IFACE $core $MASK $IFACE $((n-1))
printf "%s" $MASK > /sys/class/net/$IFACE/queues/tx-$((n-1))/xps_cpus
;;
*)
esac
}
# Allow usage of , or -
#
parse_range () {
RANGE=${@//,/ }
RANGE=${RANGE//-/..}
LIST=""
for r in $RANGE; do
# eval lets us use vars in {#..#} range
[[ $r =~ '..' ]] && r="$(eval echo {$r})"
LIST+=" $r"
done
echo $LIST
}
# Affinitize interrupts
#
setaff()
{
CORES=$(parse_range $CORES)
ncores=$(echo $CORES | wc -w)
n=1
# this script only supports interrupt vectors in pairs,
# modification would be required to support a single Tx or Rx queue
# per interrupt vector
queues="${IFACE}-.*TxRx"
irqs=$(grep "$queues" /proc/interrupts | cut -f1 -d:)
[ -z "$irqs" ] && irqs=$(grep $IFACE /proc/interrupts | cut -f1 -d:)
[ -z "$irqs" ] && irqs=$(for i in `ls -Ux /sys/class/net/$IFACE/device/msi_irqs` ;\
do grep "$i:.*TxRx" /proc/interrupts | grep -v fdir | cut -f 1 -d : ;\
done)
[ -z "$irqs" ] && echo "Error: Could not find interrupts for $IFACE"
echo "IFACE CORE MASK -> FILE"
echo "======================="
for IRQ in $irqs; do
[ "$n" -gt "$ncores" ] && n=1
j=1
# much faster than calling cut for each
for i in $CORES; do
[ $((j++)) -ge $n ] && break
done
core=$i
set_affinity
((n++))
done
}
# now the actual useful bits of code
# these next 2 lines would allow script to auto-determine interfaces
#[ -z "$IFACES" ] && IFACES=$(ls /sys/class/net)
#[ -z "$IFACES" ] && echo "Error: No interfaces up" && exit 1
# echo IFACES is $IFACES
CORES=$(</sys/devices/system/cpu/online)
[ "$CORES" ] || CORES=$(grep ^proc /proc/cpuinfo | cut -f2 -d:)
# Core list for each node from sysfs
node_dir=/sys/devices/system/node
for i in $(ls -d $node_dir/node*); do
i=${i/*node/}
corelist[$i]=$(<$node_dir/node${i}/cpulist)
done
for IFACE in $IFACES; do
# echo $IFACE being modified
dev_dir=/sys/class/net/$IFACE/device
[ -e $dev_dir/numa_node ] && node=$(<$dev_dir/numa_node)
[ "$node" ] && [ "$node" -gt 0 ] || node=0
case "$AFF" in
local)
CORES=${corelist[$node]}
;;
remote)
[ "$rnode" ] || { [ $node -eq 0 ] && rnode=1 || rnode=0; }
CORES=${corelist[$rnode]}
;;
one)
[ -n "$cnt" ] || cnt=0
CORES=$cnt
;;
all)
CORES=$CORES
;;
custom)
echo -n "Input cores for $IFACE (ex. 0-7,15-23): "
read CORES
;;
[0-9]*)
CORES=$AFF
;;
*)
usage
exit 1
;;
esac
# call the worker function
setaff
done
# check for irqbalance running
IRQBALANCE_ON=`ps ax | grep -v grep | grep -q irqbalance; echo $?`
if [ "$IRQBALANCE_ON" == "0" ] ; then
echo " WARNING: irqbalance is running and will"
echo " likely override this script's affinitization."
echo " Please stop the irqbalance service and/or execute"
echo " 'killall irqbalance'"
fi
结果为：
sh set_aff.sh eth18
IFACE CORE MASK -> FILE
=======================
eth18 0 1 -> /proc/irq/171/smp_affinity
eth18 1 2 -> /proc/irq/172/smp_affinity
eth18 2 4 -> /proc/irq/173/smp_affinity
eth18 3 8 -> /proc/irq/174/smp_affinity
eth18 4 10 -> /proc/irq/175/smp_affinity
eth18 5 20 -> /proc/irq/176/smp_affinity
eth18 6 40 -> /proc/irq/177/smp_affinity
eth18 7 80 -> /proc/irq/178/smp_affinity
eth18 8 100 -> /proc/irq/179/smp_affinity
eth18 9 200 -> /proc/irq/180/smp_affinity
eth18 10 400 -> /proc/irq/181/smp_affinity
eth18 11 800 -> /proc/irq/182/smp_affinity
eth18 12 1000 -> /proc/irq/183/smp_affinity
eth18 13 2000 -> /proc/irq/184/smp_affinity
eth18 14 4000 -> /proc/irq/185/smp_affinity
eth18 15 8000 -> /proc/irq/186/smp_affinity
eth18 16 10000 -> /proc/irq/187/smp_affinity
eth18 17 20000 -> /proc/irq/188/smp_affinity
eth18 18 40000 -> /proc/irq/189/smp_affinity
eth18 19 80000 -> /proc/irq/190/smp_affinity
eth18 20 100000 -> /proc/irq/191/smp_affinity
eth18 21 200000 -> /proc/irq/192/smp_affinity
eth18 22 400000 -> /proc/irq/193/smp_affinity
eth18 23 800000 -> /proc/irq/194/smp_affinity
eth18 24 1000000 -> /proc/irq/195/smp_affinity
eth18 25 2000000 -> /proc/irq/196/smp_affinity
eth18 26 4000000 -> /proc/irq/197/smp_affinity
eth18 27 8000000 -> /proc/irq/198/smp_affinity
eth18 28 10000000 -> /proc/irq/199/smp_affinity
eth18 29 20000000 -> /proc/irq/200/smp_affinity
eth18 30 40000000 -> /proc/irq/201/smp_affinity
eth18 31 80000000 -> /proc/irq/202/smp_affinity
eth18 32 1,00000000 -> /proc/irq/203/smp_affinity
eth18 33 2,00000000 -> /proc/irq/204/smp_affinity
eth18 34 4,00000000 -> /proc/irq/205/smp_affinity
eth18 35 8,00000000 -> /proc/irq/206/smp_affinity
eth18 36 10,00000000 -> /proc/irq/207/smp_affinity
eth18 37 20,00000000 -> /proc/irq/208/smp_affinity
eth18 38 40,00000000 -> /proc/irq/209/smp_affinity
eth18 39 80,00000000 -> /proc/irq/210/smp_affinity
eth18 40 100,00000000 -> /proc/irq/211/smp_affinity
eth18 41 200,00000000 -> /proc/irq/212/smp_affinity
eth18 42 400,00000000 -> /proc/irq/213/smp_affinity
eth18 43 800,00000000 -> /proc/irq/214/smp_affinity
eth18 44 1000,00000000 -> /proc/irq/215/smp_affinity
eth18 45 2000,00000000 -> /proc/irq/216/smp_affinity
eth18 46 4000,00000000 -> /proc/irq/217/smp_affinity
eth18 47 8000,00000000 -> /proc/irq/218/smp_affinity
for ((i=229; i<=276; i ++)); do echo $i; cat /proc/irq/$i/smp_affinity; done
for ((i=171; i<=218; i ++)); do echo $i; cat /proc/irq/$i/smp_affinity; done
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但行好事 莫问前程
--身高体重180的胖子
