diff --git a/configure b/configure
index cfd64968..27b9f93a 100755
--- a/configure
+++ b/configure
@@ -644,13 +644,14 @@ IHK_RELEASE_DATE
 DCFA_VERSION
 MCKERNEL_VERSION
 IHK_VERSION
+ENABLE_RUSAGE
 ENABLE_MCOVERLAYFS
 MANDIR
 KERNDIR
 KMODDIR
 ETCDIR
+MCKERNEL_LIBDIR
 SBINDIR
-LIBDIR
 BINDIR
 TARGET
 UNAME_R
@@ -713,6 +714,7 @@ with_system_map
 enable_dcfa
 enable_memdump
 enable_mcoverlayfs
+enable_rusage
 with_uname_r
 '
       ac_precious_vars='build_alias
@@ -1348,6 +1350,7 @@ Optional Features:
   --enable-dcfa           Enable DCFA modules
   --enable-memdump        enable dumping memory and analyzing a dump
   --enable-mcoverlayfs    enable mcoverlayfs implementation
+  --enable-rusage         enable rusage implementation
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -3649,6 +3652,14 @@ else
 fi
 
 
+# Check whether --enable-rusage was given.
+if test "${enable_rusage+set}" = set; then :
+  enableval=$enable_rusage; ENABLE_RUSAGE=$enableval
+else
+  ENABLE_RUSAGE=yes
+fi
+
+
 
 # Check whether --with-uname_r was given.
 if test "${with_uname_r+set}" = set; then
@@ -4478,12 +4489,12 @@ case $WITH_TARGET in
 	if test "X$BINDIR" = X; then
 		BINDIR="$prefix/bin"
 	fi
-	if test "X$LIBDIR" = X; then
-		LIBDIR="$prefix/lib"
-	fi
 	if test "X$SBINDIR" = X; then
 		SBINDIR="$prefix/sbin"
 	fi
+        if test "X$MCKERNEL_LIBDIR" = X; then
+                MCKERNEL_LIBDIR="$prefix/lib"
+        fi
 	if test "X$ETCDIR" = X; then
 		ETCDIR="$prefix/etc"
 	fi
@@ -5118,10 +5129,32 @@ else
 $as_echo "$as_me: mcoverlayfs is disabled" >&6;}
 fi
 
-if test "x$LIBDIR" != "x" ; then
+case $ENABLE_RUSAGE in
+	yes|no)
+		;;
+	default)
+		ENABLE_RUSAGE=yes
+		;;
+	*)
+		as_fn_error $? "unknown rusage argument: $ENABLE_RUSAGE" "$LINENO" 5
+		;;
+esac
+
+if test "x$ENABLE_RUSAGE" = "xyes" ; then
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: rusage is enabled" >&5
+$as_echo "$as_me: rusage is enabled" >&6;}
+
+$as_echo "#define ENABLE_RUSAGE 1" >>confdefs.h
+
+else
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: rusage is disabled" >&5
+$as_echo "$as_me: rusage is disabled" >&6;}
+fi
+
+if test "x$MCKERNEL_LIBDIR" != "x" ; then
 
 cat >>confdefs.h <<_ACEOF
-#define MCKERNEL_LIBDIR "$LIBDIR"
+#define MCKERNEL_LIBDIR "$MCKERNEL_LIBDIR"
 _ACEOF
 
 fi
@@ -5149,6 +5182,9 @@ fi
 
 
 
+
+
+ac_config_headers="$ac_config_headers kernel/include/config.h"
 
 ac_config_headers="$ac_config_headers executer/config.h"
 
@@ -5755,6 +5791,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 for ac_config_target in $ac_config_targets
 do
   case $ac_config_target in
+    "kernel/include/config.h") CONFIG_HEADERS="$CONFIG_HEADERS kernel/include/config.h" ;;
     "executer/config.h") CONFIG_HEADERS="$CONFIG_HEADERS executer/config.h" ;;
     "Makefile") CONFIG_FILES="$CONFIG_FILES Makefile" ;;
     "executer/user/Makefile") CONFIG_FILES="$CONFIG_FILES executer/user/Makefile" ;;
diff --git a/configure.ac b/configure.ac
index ebd97c3b..ae1a1b7b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -55,6 +55,12 @@ AC_ARG_ENABLE([mcoverlayfs],
 	      [ENABLE_MCOVERLAYFS=$enableval],
 	      [ENABLE_MCOVERLAYFS=yes])
 
+AC_ARG_ENABLE([rusage],
+	      AC_HELP_STRING([--enable-rusage],
+			     [enable rusage implementation]),
+	      [ENABLE_RUSAGE=$enableval],
+	      [ENABLE_RUSAGE=yes])
+
 AC_ARG_WITH([uname_r],
   AC_HELP_STRING(
     [--with-uname_r=uname_r],[Value of '`uname -r`' on the target platform, default is local value]),
@@ -162,12 +168,12 @@ case $WITH_TARGET in
 	if test "X$BINDIR" = X; then
 		BINDIR="$prefix/bin"
 	fi
-	if test "X$LIBDIR" = X; then
-		LIBDIR="$prefix/lib"
-	fi
 	if test "X$SBINDIR" = X; then
 		SBINDIR="$prefix/sbin"
 	fi
+        if test "X$MCKERNEL_LIBDIR" = X; then
+                MCKERNEL_LIBDIR="$prefix/lib"
+        fi
 	if test "X$ETCDIR" = X; then
 		ETCDIR="$prefix/etc"
 	fi
@@ -298,8 +304,26 @@ else
 	AC_MSG_NOTICE([mcoverlayfs is disabled])
 fi
 
-if test "x$LIBDIR" != "x" ; then
-	AC_DEFINE_UNQUOTED(MCKERNEL_LIBDIR,"$LIBDIR",[McKernel specific libraries])
+case $ENABLE_RUSAGE in
+	yes|no)
+		;;
+	default)
+		ENABLE_RUSAGE=yes
+		;;
+	*)
+		AC_MSG_ERROR([unknown rusage argument: $ENABLE_RUSAGE])
+		;;
+esac
+
+if test "x$ENABLE_RUSAGE" = "xyes" ; then
+	AC_MSG_NOTICE([rusage is enabled])
+	AC_DEFINE([ENABLE_RUSAGE],[1],[whether rusage is enabled])
+else
+	AC_MSG_NOTICE([rusage is disabled])
+fi
+
+if test "x$MCKERNEL_LIBDIR" != "x" ; then
+   AC_DEFINE_UNQUOTED(MCKERNEL_LIBDIR,"$MCKERNEL_LIBDIR",[McKernel specific libraries])
 fi
 
 AC_SUBST(CC)
@@ -309,14 +333,15 @@ AC_SUBST(KDIR)
 AC_SUBST(UNAME_R)
 AC_SUBST(TARGET)
 AC_SUBST(BINDIR)
-AC_SUBST(LIBDIR)
 AC_SUBST(SBINDIR)
+AC_SUBST(MCKERNEL_LIBDIR)
 AC_SUBST(ETCDIR)
 AC_SUBST(KMODDIR)
 AC_SUBST(KERNDIR)
 AC_SUBST(MANDIR)
 AC_SUBST(CFLAGS)
 AC_SUBST(ENABLE_MCOVERLAYFS)
+AC_SUBST(ENABLE_RUSAGE)
 
 AC_SUBST(IHK_VERSION)
 AC_SUBST(MCKERNEL_VERSION)
@@ -326,6 +351,7 @@ AC_SUBST(MCKERNEL_RELEASE_DATE)
 AC_SUBST(DCFA_RESEASE_DATE)
 AC_SUBST(uncomment_if_ENABLE_MEMDUMP)
 
+AC_CONFIG_HEADERS([kernel/include/config.h])
 AC_CONFIG_HEADERS([executer/config.h])
 AC_CONFIG_FILES([
 	Makefile
diff --git a/executer/user/Makefile.in b/executer/user/Makefile.in
index 784d3fe2..6d3b2b23 100644
--- a/executer/user/Makefile.in
+++ b/executer/user/Makefile.in
@@ -1,6 +1,6 @@
 CC=@CC@
 BINDIR=@BINDIR@
-LIBDIR=@LIBDIR@
+MCKERNEL_LIBDIR=@MCKERNEL_LIBDIR@
 KDIR ?= @KDIR@
 CFLAGS=-Wall -O -I.
 VPATH=@abs_srcdir@
@@ -28,7 +28,7 @@ clean:
 install:
 	mkdir -p -m 755 $(BINDIR)
 	install -m 755 mcexec $(BINDIR)
-	mkdir -p -m 755 $(LIBDIR)
-	install -m 755 libsched_yield.so.1.0.0 $(LIBDIR)
+	mkdir -p -m 755 $(MCKERNEL_LIBDIR)
+	install -m 755 libsched_yield.so.1.0.0 $(MCKERNEL_LIBDIR)
 	@uncomment_if_ENABLE_MEMDUMP@install -m 755 eclair $(BINDIR)
 
diff --git a/kernel/Makefile.build.in b/kernel/Makefile.build.in
index 26c4981c..0611f570 100644
--- a/kernel/Makefile.build.in
+++ b/kernel/Makefile.build.in
@@ -1,17 +1,12 @@
-ENABLE_RUSAGE=@ENABLE_RUSAGE@
 VPATH=@abs_srcdir@
 SRC=$(VPATH)
 IHKDIR=$(IHKBASE)/$(TARGETDIR)
 OBJS = init.o mem.o debug.o mikc.o listeners.o ap.o syscall.o cls.o host.o
 OBJS += process.o copy.o waitq.o futex.o timer.o plist.o fileobj.o shmobj.o
-OBJS += zeroobj.o procfs.o devobj.o sysfs.o xpmem.o profile.o rusage.o freeze.o
+OBJS += zeroobj.o procfs.o devobj.o sysfs.o xpmem.o rusage.o profile.c freeze.o
 DEPSRCS=$(wildcard $(SRC)/*.c)
-DOPT=
-ifeq ($(ENABLE_RUSAGE),yes)
-DOPT=-DENABLE_RUSAGE
-endif
 
-CFLAGS += -I$(SRC)/include -D__KERNEL__ $(DOPT) -g -fno-omit-frame-pointer -fno-inline -fno-inline-small-functions
+CFLAGS += -I$(SRC)/include -I@abs_builddir@/include -D__KERNEL__  -g -fno-omit-frame-pointer -fno-inline -fno-inline-small-functions
 LDFLAGS += -e arch_start
 IHKOBJ = ihk/ihk.o
 
diff --git a/kernel/include/rusage.h b/kernel/include/rusage.h
index 43b9f5f0..65f1cd01 100644
--- a/kernel/include/rusage.h
+++ b/kernel/include/rusage.h
@@ -1,6 +1,8 @@
 #ifndef __RUSAGE_H
 #define __RUSAGE_H
 
+#include "config.h"
+
 #define RUSAGE_DEFAULT_SIZE 10
 
 enum RUSAGE_MEMBER {
@@ -64,7 +66,6 @@ enum sys_delegate_state_enum {
 };
 enum sys_delegate_state_enum sys_delegate_state;
 
-unsigned long rusage_rss[sizeof(cpu_set_t)/8];
 unsigned long rusage_rss_max;
 long rusage_rss_current;
 unsigned long rusage_kmem_usage;
@@ -76,4 +77,7 @@ unsigned long rusage_max_memory;
 
 #define RUSAGE_MEM_LIMIT 2000000
 
+void rusage_init();
+void rusage_inc_num_threads(int count);
+
 #endif
diff --git a/kernel/process.c b/kernel/process.c
index 66a9d213..fed0d6d2 100644
--- a/kernel/process.c
+++ b/kernel/process.c
@@ -334,23 +334,7 @@ struct thread *create_thread(unsigned long user_pc,
 	ihk_mc_spinlock_init(&thread->spin_sleep_lock);
 	thread->spin_sleep = 0;
 #ifdef ENABLE_RUSAGE
-	{
-		int processor_id;
-		unsigned long curr;
-		processor_id = ihk_mc_get_processor_id();
-		rusage_rss[processor_id] += KERNEL_STACK_NR_PAGES * PAGE_SIZE;
-		curr = ihk_atomic_add_long_return ( KERNEL_STACK_NR_PAGES * PAGE_SIZE, &rusage_rss_current);
-		if (rusage_rss_max < curr) {
-			atomic_cmpxchg8(&rusage_rss_max, rusage_rss_max, curr);
-		}
-		if (rusage_max_memory - curr < RUSAGE_MEM_LIMIT) {
-			event_signal();
-		}
-		ihk_atomic_add_ulong ( 1, &rusage_num_threads);
-		if (rusage_max_num_threads < rusage_num_threads) {
-			atomic_cmpxchg8(&rusage_max_num_threads, rusage_max_num_threads, rusage_num_threads);
-		}
-	}
+	rusage_inc_num_threads(1);
 #endif
 	return thread;
 
@@ -503,25 +487,7 @@ clone_thread(struct thread *org, unsigned long pc, unsigned long sp,
 	thread->spin_sleep = 0;
 
 #ifdef ENABLE_RUSAGE
-	{
-		int processor_id;
-		long curr;
-		processor_id = ihk_mc_get_processor_id();
-		rusage_rss[processor_id] += KERNEL_STACK_NR_PAGES * PAGE_SIZE;
-		curr = ihk_atomic_add_long_return (KERNEL_STACK_NR_PAGES * PAGE_SIZE, &rusage_rss_current);
-		if (rusage_rss_max < curr) {
-			atomic_cmpxchg8(&rusage_rss_max, rusage_rss_max, curr);
-		}
-		if (rusage_max_memory - curr < RUSAGE_MEM_LIMIT) {
-			event_signal();
-		}
-
-		ihk_atomic_add_ulong ( 1, &rusage_num_threads);
-
-		if (rusage_max_num_threads < rusage_num_threads) {
-			atomic_cmpxchg8(&rusage_max_num_threads, rusage_max_num_threads, rusage_num_threads);
-		}
-	}
+	rusage_inc_num_threads(1);
 #endif
 
 #ifdef PROFILE_ENABLE
@@ -2040,11 +2006,7 @@ int init_process_stack(struct thread *thread, struct program_load_desc *pn,
 
 #ifdef ENABLE_RUSAGE
 {
-	int processor_id;
 	long curr;
-
-	processor_id = ihk_mc_get_processor_id();
-	rusage_rss[processor_id] += (minsz >> PAGE_SHIFT) * PAGE_SIZE;
 	curr = ihk_atomic_add_long_return ((minsz >> PAGE_SHIFT) * PAGE_SIZE, &rusage_rss_current);
 	if (rusage_rss_max < curr) {
 		atomic_cmpxchg8(&rusage_rss_max, rusage_rss_max, curr);
@@ -2054,7 +2016,6 @@ int init_process_stack(struct thread *thread, struct program_load_desc *pn,
 	}
 }
 #endif
-
 	return 0;
 }
 
@@ -2102,10 +2063,7 @@ unsigned long extend_process_region(struct process_vm *vm,
 
 #ifdef ENABLE_RUSAGE
 {
-	int processor_id;
 	long curr;
-	processor_id = ihk_mc_get_processor_id();
-	rusage_rss[processor_id] += ((new_end_allocated - end_allocated) >> PAGE_SHIFT) * PAGE_SIZE;
 	curr = ihk_atomic_add_long_return (((new_end_allocated - end_allocated) >> PAGE_SHIFT) * PAGE_SIZE, &rusage_rss_current);
 	if (rusage_rss_max < curr) {
 		atomic_cmpxchg8(&rusage_rss_max, rusage_rss_max, curr);
@@ -2419,10 +2377,6 @@ void destroy_thread(struct thread *thread)
 
 #ifdef ENABLE_RUSAGE
 {
-	int processor_id;
-	processor_id = ihk_mc_get_processor_id();
-	rusage_rss[processor_id] -= KERNEL_STACK_NR_PAGES * PAGE_SIZE;
-	ihk_atomic_add_long_return(KERNEL_STACK_NR_PAGES * PAGE_SIZE * (-1) , &rusage_rss_current);
 	ihk_atomic_add_ulong ( -1, &rusage_num_threads);
 }
 #endif
diff --git a/kernel/rusage.c b/kernel/rusage.c
index 397a4f83..adf5f360 100644
--- a/kernel/rusage.c
+++ b/kernel/rusage.c
@@ -34,14 +34,40 @@ extern struct ihk_os_monitor *monitor;
 
 
 #ifdef ENABLE_RUSAGE
+/* initialize rusage */
+void rusage_init() {
+	int i;
+	rusage_num_threads = 0;
+	rusage_max_num_threads = 0;
+
+	os_status = IHK_STATUS_INACTIVE;
+	rusage_hugetlb_usage = 0;
+	rusage_hugetlb_max_usage = 0;
+	for (i = 0; i < 1024; i++) {
+		rusage_numa_stat[i] = 0;
+	}
+	rusage_rss_current = 0;
+	rusage_rss_max = 0;
+}
+
+void rusage_inc_num_threads(int count) {
+	volatile unsigned long max_obs1, max_obs2;
+	ihk_atomic_add_ulong(count, &rusage_num_threads);
+	max_obs1 = rusage_max_num_threads;
+	if (max_obs1 < rusage_num_threads) {
+	retry:
+		max_obs2 = atomic_cmpxchg8(&rusage_max_num_threads, max_obs1, rusage_num_threads);
+		if(max_obs2 != max_obs1 &&
+		   max_obs2 < rusage_num_threads) {
+			max_obs1 = max_obs2;
+			goto retry;
+		}
+	}
+}
+
 /* count total rss */
 unsigned long count_rss () {
-	int i;
-	unsigned long val = 0;
-	for(i = 0; i < sizeof(cpu_set_t)/8; i++){
-		val += rusage_rss[i];
-	}
-	return val;
+	return rusage_rss_current;
 }
 
 /* count total cache */