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Last active September 22, 2024 07:40
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#!/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
@arun2arunraj
Copy link

How to persistently set the specific CPU for the Network Adaptor's (the values should be across the reboot) ?

We have been trying by custom systemd script to keep the configuration persistent across the reboot. custom service running perfect. Even it is executing the above script perfectly. But still the node throws wrong CPU set's.

We have added the following lines in our systemd script.

/etc/sriov/set_irq_affinity -x 0,1,32,33 sriov0 /etc/sriov/set_irq_affinity -x 0,1,32,33 sriov1 /etc/sriov/set_irq_affinity -x 0,1,32,33 sriov2 /etc/sriov/set_irq_affinity -x 0,1,32,33 sriov3

Systemd script :

`[Unit]
Description=Sriov Config Service
After=systemd-udevd.service
#Before=kubelet.service

[Service]
#Type=oneshot
ExecStart=/etc/sriov/setup_dpdk_nic.sh
StartLimitInterval=120
StartLimitBurst=3
LimitCORE=infinity
TimeoutStopSec=90

[Install]
WantedBy=multi-user.target`

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