[patch] Use chrt and cpu_share

bug243194a.patch (text/plain), 1.59 KB, created by Martin von Gagern on 2008-10-22 10:07:06 UTC

diff -ur files.orig/boinc.conf files/boinc.conf
--- files.orig/boinc.conf	2005-10-29 17:06:10.000000000 +0200
+++ files/boinc.conf	2008-10-22 11:48:46.000000000 +0200
@@ -18,3 +18,11 @@
 
 # nice level
 NICELEVEL="19"
+
+# scheduling parameters, arguments to chrt(1)
+SCHED_PARAM="--batch 0"
+
+# Relative CPU allocation for boinc user, default is 1024,
+# requires CONFIG_FAIR_GROUP_SCHED and CONFIG_USER_SCHED,
+# see /usr/src/linux/Documentation/scheduler/sched-design-CFS.txt
+CPU_SHARE="128"
diff -ur files.orig/boinc.init files/boinc.init
--- files.orig/boinc.init	2005-12-18 14:36:13.000000000 +0100
+++ files/boinc.init	2008-10-22 11:53:36.000000000 +0200
@@ -41,11 +41,31 @@
 		ARGS="${ARGS} -allow_remote_gui_rpc"
 	fi
 
-	setsid start-stop-daemon --quiet --start  --chdir ${RUNTIMEDIR} \
+	if [ "${SCHED_PARAM}" -a -x /usr/bin/chrt ]; then
+		CHRT="/usr/bin/chrt ${SCHED_PARAM}"
+	else
+		CHRT=""
+	fi
+
+	${CHRT} start-stop-daemon \
+		--quiet --start --chdir ${RUNTIMEDIR} \
 		--exec ${BOINCBIN} --chuid ${USER}:${GROUP} \
-		--nicelevel ${NICELEVEL} -- ${ARGS} > ${LOGFILE} 2>&1 &
+		--background --stdout ${LOGFILE} --stderr ${LOGFILE} \
+		--nicelevel ${NICELEVEL} -- ${ARGS}
 
-	eend $?
+	RESULT=$?
+
+	if [ "${CPU_SHARE}" -a -d /sys/kernel/uids ]; then
+		BUID=`id -u ${USER}`
+		# It might take a moment for start-stop-daemon to chuid
+		[ -d /sys/kernel/uids/${BUID} ] || sleep 1	       
+		[ -d /sys/kernel/uids/${BUID} ] || sleep 2
+		if [ -w /sys/kernel/uids/${BUID}/cpu_share ]; then
+			echo ${CPU_SHARE} > /sys/kernel/uids/${BUID}/cpu_share
+		fi							      
+	fi	  
+
+	eend ${RESULT}
 }
 
 attach() {