绑定网卡中断irq到cpu shell 脚本

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