# Set up hugepages
echo "vm.nr_hugepages = ${NUM_HUGEPAGES}" > /etc/sysctl.conf
+echo "vm.swappiness = 0" >> /etc/sysctl.conf
+echo "kernel.randomize_va_space = 0" >> /etc/sysctl.conf
sysctl -p
mkdir -p /mnt/huge
grep -q hugetlbfs /etc/fstab || echo "hugetlbfs /mnt/huge hugetlbfs mode=1770,gid=2021 0 0" >> /etc/fstab
#
for dev in $(find /sys/bus/pci/drivers/virtio-pci -type l -name '*:*:*.*' | sed -e 's/.*\///')
do
- echo Unbinding $dev from virtio-pci
- echo $dev > /sys/bus/pci/drivers/virtio-pci/unbind
- echo Binding $dev to ${TARGET_DRIVER}
- echo $dev > /sys/bus/pci/drivers/${TARGET_DRIVER}/bind
+ class=$(cat /sys/bus/pci/drivers/virtio-pci/${dev}/class)
+ if [ "$class" = "0x020000" ]; then
+ echo Unbinding $dev from virtio-pci
+ echo $dev > /sys/bus/pci/drivers/virtio-pci/unbind
+ echo Binding $dev to ${TARGET_DRIVER}
+ echo $dev > /sys/bus/pci/drivers/${TARGET_DRIVER}/bind
+ fi
done
+# RCU and IRQ affinity
for i in $(ls /proc/irq/ | grep [0-9])
do
echo 1 > /proc/irq/$i/smp_affinity
done
+echo 1 | sudo tee /sys/bus/workqueue/devices/writeback/cpumask
+
+# There is a bug causing packet loss when VM is initialized. This workaround is
+# supposed to re-initialize CPUs.
+for i in $(ls -d /sys/devices/system/cpu/cpu[1-9]/online); do
+ echo 0 | sudo tee $i
+ sleep 2
+ echo 1 | sudo tee $i
+done
# Start testpmd in the background. This looks a bit convoluted; we need to redirect stdin
# (and keep stdin active) or else testpmd will quit.