diff --git a/arch/x86_64/tools/mcreboot-smp-x86.sh.in b/arch/x86_64/tools/mcreboot-smp-x86.sh.in
index f84ce034..6d66e3d8 100644
--- a/arch/x86_64/tools/mcreboot-smp-x86.sh.in
+++ b/arch/x86_64/tools/mcreboot-smp-x86.sh.in
@@ -49,8 +49,9 @@ safe_kernel_map=""
 umask_old=`umask`
 idle_halt=""
 allow_oversubscribe=""
+time_sharing="time_sharing"
 
-while getopts stk:c:m:o:f:r:q:i:d:e:hO OPT
+while getopts stk:c:m:o:f:r:q:i:d:e:hOT: OPT
 do
 	case ${OPT} in
 	f)	facility=${OPTARG}
@@ -81,6 +82,14 @@ do
 		;;
 	O) allow_oversubscribe="allow_oversubscribe"
 		;;
+	T)
+		case ${OPTARG} in
+		    1) time_sharing="time_sharing"
+			;;
+		    0) time_sharing=""
+			;;
+		esac
+		;;
 	\?) exit 1
 		;;
 	esac
@@ -449,7 +458,7 @@ if ! ${SBINDIR}/ihkosctl 0 load ${KERNDIR}/mckernel.img; then
 fi
 
 # Set kernel arguments
-if ! ${SBINDIR}/ihkosctl 0 kargs "hidos $turbo $safe_kernel_map $idle_halt dump_level=${DUMP_LEVEL} $extra_kopts $allow_oversubscribe"; then
+if ! ${SBINDIR}/ihkosctl 0 kargs "hidos $turbo $safe_kernel_map $idle_halt dump_level=${DUMP_LEVEL} $extra_kopts $allow_oversubscribe $time_sharing"; then
 	echo "error: setting kernel arguments" >&2
 	error_exit "os_created"
 fi
diff --git a/kernel/include/process.h b/kernel/include/process.h
index 4b0f6472..6f34ee2e 100644
--- a/kernel/include/process.h
+++ b/kernel/include/process.h
@@ -280,6 +280,7 @@ extern struct list_head	resource_set_list;
 extern mcs_rwlock_lock_t	resource_set_lock;
 extern int idle_halt;
 extern int allow_oversubscribe;
+extern int time_sharing;
 extern ihk_spinlock_t runq_reservation_lock; /* mutex for cpuid reservation (clv->runq_reserved) */
 
 struct process_hash {
diff --git a/kernel/init.c b/kernel/init.c
index 2618b983..1b5a3761 100644
--- a/kernel/init.c
+++ b/kernel/init.c
@@ -168,6 +168,12 @@ static void parse_kargs(void)
 	if (ptr) {
 		allow_oversubscribe = 1;
 	}
+
+	/* time_sharing option */
+	ptr = find_command_line("time_sharing");
+	if (ptr) {
+		time_sharing = 1;
+	}
 }
 
 extern void ihk_mc_get_boot_time(unsigned long *tv_sec, unsigned long *tv_nsec);
diff --git a/kernel/process.c b/kernel/process.c
index 1640a157..387d74b7 100644
--- a/kernel/process.c
+++ b/kernel/process.c
@@ -91,6 +91,7 @@ ihk_spinlock_t runq_reservation_lock;
 
 int idle_halt = 0;
 int allow_oversubscribe = 0;
+int time_sharing = 0;
 
 void
 init_process(struct process *proc, struct process *parent)
@@ -3100,6 +3101,10 @@ void set_timer(int runq_locked)
 	int num_running = 0;
 	unsigned long irqstate;
 
+	if (!time_sharing) {
+		return;
+	}
+
 	if (!runq_locked) {
 		irqstate = ihk_mc_spinlock_lock(&(v->runq_lock));
 	}