irqbalance: new package

Irqbalance is a daemon to help balance the cpu load generated by
interrupts across all of a systems cpus.

[Thomas:
 - Add upstream URL in Config.in help text.
 - Fix indentation of init script.]

Signed-off-by: Karoly Kasza <kaszak@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/Config.in

@@ -1249,6 +1249,7 @@ endif
 	source "package/getent/Config.in"
 	source "package/htop/Config.in"
 	source "package/iprutils/Config.in"
+	source "package/irqbalance/Config.in"
 	source "package/keyutils/Config.in"
 	source "package/kmod/Config.in"
 	source "package/lxc/Config.in"

package/irqbalance/Config.in

@@ -0,0 +1,11 @@
+config BR2_PACKAGE_IRQBALANCE
+	bool "irqbalance"
+	help
+	  Irqbalance is a daemon to help balance the cpu load generated
+	  by interrupts across all of a systems cpus.
+	  Irqbalance identifies the highest volume interrupt sources,
+	  and isolates them to a single unique cpu, so that load is
+	  spread as much as possible over an entire processor set, while
+	  minimizing cache hit rates for irq handlers.
+
+	  https://github.com/Irqbalance/irqbalance

package/irqbalance/S13irqbalance

@@ -0,0 +1,34 @@
+#!/bin/sh
+#
+# Starts irqbalance
+#
+
+EXEC="/usr/sbin/irqbalance"
+ARGS=""
+PID="/var/run/irqbalance.pid"
+
+case "$1" in
+    start)
+	echo -n "Starting irqbalance: "
+	start-stop-daemon -S -q -x $EXEC -- $ARGS
+	if [ $? != 0 ]; then
+	    echo "FAILED"
+	    exit 1
+	else
+	    echo "OK"
+	fi
+	pidof irqbalance > $PID
+	;;
+    stop)
+	echo -n "Stopping irqbalance: "
+	start-stop-daemon -K -q -p $PID
+	echo "OK"
+	;;
+    restart|reload)
+	$0 stop
+	$0 start
+	;;
+    *)
+	echo "Usage: $0 {start|stop|restart}"
+	exit 1
+esac

package/irqbalance/irqbalance.mk

@@ -0,0 +1,35 @@
+################################################################################
+#
+# irqbalance
+#
+################################################################################
+
+IRQBALANCE_VERSION = v1.0.8
+IRQBALANCE_SITE = $(call github,irqbalance,irqbalance,$(IRQBALANCE_VERSION))
+IRQBALANCE_LICENSE = GPLv2
+IRQBALANCE_LICENSE_FILES = COPYING
+IRQBALANCE_DEPENDENCIES = host-pkgconf
+# Autoreconf needed because package is distributed without a configure script
+IRQBALANCE_AUTORECONF = YES
+
+# This would be done by the package's autogen.sh script
+define IRQBALANCE_PRECONFIGURE
+	mkdir -p $(@D)/m4
+endef
+
+IRQBALANCE_PRE_CONFIGURE_HOOKS += IRQBALANCE_PRECONFIGURE
+
+define IRQBALANCE_INSTALL_INIT_SYSV
+	$(INSTALL) -D -m 755 package/irqbalance/S13irqbalance \
+		$(TARGET_DIR)/etc/init.d/S13irqbalance
+endef
+
+define IRQBALANCE_INSTALL_INIT_SYSTEMD
+	$(INSTALL) -D -m 644 package/irqbalance/irqbalance.service \
+		$(TARGET_DIR)/etc/systemd/system/irqbalance.service
+	mkdir -p $(TARGET_DIR)/etc/systemd/system/multi-user.target.wants
+	ln -fs ../irqbalance.service \
+		$(TARGET_DIR)/etc/systemd/system/multi-user.target.wants/irqbalance.service
+endef
+
+$(eval $(autotools-package))

package/irqbalance/irqbalance.service

@@ -0,0 +1,9 @@
+[Unit]
+Description=irqbalance daemon
+After=syslog.target
+
+[Service]
+ExecStart=/usr/sbin/irqbalance --foreground
+
+[Install]
+WantedBy=multi-user.target