X-Git-Url: https://gerrit.fd.io/r/gitweb?p=csit.git;a=blobdiff_plain;f=resources%2Ftools%2Fdisk-image-builder%2Fnested%2Fimage-patches%2F06-dpdk-support;h=5990f0925bc08888d0e80a29ea79422259821f00;hp=fb166ef2cf6f73c39d7a42e42556e3f780730ac8;hb=0e627645f1423b2c429a0d5873b6c90f24e0ed24;hpb=97792bf731c00968581d98fcbea67e69ce9c6abd

diff --git a/resources/tools/disk-image-builder/nested/image-patches/06-dpdk-support b/resources/tools/disk-image-builder/nested/image-patches/06-dpdk-support
index fb166ef2cf..5990f0925b 100755
--- a/resources/tools/disk-image-builder/nested/image-patches/06-dpdk-support
+++ b/resources/tools/disk-image-builder/nested/image-patches/06-dpdk-support
@@ -34,6 +34,8 @@ fi
 
 # 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
@@ -50,10 +52,20 @@ do
   echo $dev > /sys/bus/pci/drivers/${TARGET_DRIVER}/bind
 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.