add support for hugepages in virtual CI machines

Author: SchSeba

hack/run-e2e-conformance-virtual-cluster.sh

@@ -214,6 +214,17 @@ systemctl enable --now load-br-netfilter
 
 systemctl restart NetworkManager
 
+echo 'GRUB_TIMEOUT=1
+GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
+GRUB_DEFAULT=saved
+GRUB_DISABLE_SUBMENU=true
+GRUB_TERMINAL_OUTPUT="console"
+GRUB_CMDLINE_LINUX="console=ttyS0,115200n8 no_timer_check net.ifnames=0 hugepagesz=2M hugepages=16 crashkernel=1G-4G:192M,4G-64G:256M,64G-:512M"
+GRUB_DISABLE_RECOVERY="true"
+GRUB_ENABLE_BLSCFG=true' > /etc/default/grub
+
+grub2-mkconfig -o /boot/grub2/grub.cfg
+
 EOF
 
 }
@@ -222,6 +233,7 @@ update_host $cluster_name-ctlplane-0
 for ((num=0; num<NUM_OF_WORKERS; num++))
 do
   update_host $cluster_name-worker-$num
+  kcli ssh $cluster_name-worker-$num sudo reboot
 done
 
 # remove the patch after multus bug is fixed

hack/run-e2e-conformance-virtual-ocp.sh

@@ -139,6 +139,26 @@ if [ `cat /etc/hosts | grep ${api_ip} | grep "default-route-openshift-image-regi
   sed -i "s/${api_ip}/${api_ip} default-route-openshift-image-registry.apps.${cluster_name}.${domain_name}/g" /etc/hosts
 fi
 
+# Create performance profile to allocate hugepages
+cat <<EOF | oc apply -f -
+apiVersion: performance.openshift.io/v1
+kind: PerformanceProfile
+metadata:
+  name: performance
+spec:
+  cpu:
+    isolated: "2-5"
+    reserved: "0-1"
+  hugepages:
+    defaultHugepagesSize: 2M
+    pages:
+      - count: 16
+        size: 2M
+  nodeSelector:
+    node-role.kubernetes.io/worker: ""
+  realTimeKernel:
+    enabled: false
+EOF
 
 cat <<EOF | oc apply -f -
 apiVersion: v1