Narcissus: throttle package install when the load is too high

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>

scripts/install-package.sh

@@ -32,6 +32,9 @@ echo $packagelist > ${TARGET_DIR}.txt
 
 echo "installing $packagelist"
 for pkg in $packagelist ; do
+	# Sleep N seconds when the load on the buildserver is too high
+	sh ${PWD}scripts/sleep.sh
+
 	echo "running: opkg-cl ${CACHE} -o ${TARGET_DIR} -f ${TARGET_DIR}/etc/opkg.conf -t ${OPKG_TMP_DIR} install $pkg"
 	yes | bin/opkg-cl ${CACHE} -o ${TARGET_DIR} -f ${TARGET_DIR}/etc/opkg.conf -t ${OPKG_TMP_DIR} install $pkg | tee ${TARGET_DIR}/log.txt
 	grep -e "rror oc" -e "ollected er" ${TARGET_DIR}/log.txt

scripts/sleep.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+LOAD="$(cat /proc/loadavg | awk -F. '{print $1}')"
+
+if [ $LOAD -gt 10 ] ; then
+	echo "load to high: $LOAD, sleeping"
+	sleep 10
+else
+	echo "load acceptable: $LOAD, continuing"
+fi