Index: uspace/app/rcubench/rcubench.c
===================================================================
--- uspace/app/rcubench/rcubench.c	(revision f74ec77cbb84f222fd6b757667946dd652e51fbe)
+++ uspace/app/rcubench/rcubench.c	(revision d22e567ad4cde5d6d4fa49c0ce72866f3c3fc5a7)
@@ -67,43 +67,15 @@
 
 
-/* Combats compiler optimizations. */
-static volatile size_t dummy = 0;
-
-static size_t sum_array(size_t *array, size_t len)
-{
-	size_t sum = 0;
-	
-	for (size_t k = 0; k < len; ++k)
-		sum += array[k];
-	
-	return sum;
-}
 
 
 static void  kernel_futex_bench(bench_t *bench)
 {
-	futex_t * const fut = &bench->bench_fut;
 	const size_t iters = bench->iters;
-	size_t sum = 0;
 	
 	for (size_t i = 0; i < iters; ++i) {
-		/* Do some work with the futex locked to encourage contention. */
-		futex_down(fut);
-		sum += sum_array(bench->array, bench->array_size);
-		futex_up(fut);
-		
-		/* 
-		 * Do half as much work to give other threads a chance to acquire 
-		 * the futex.
-		 */
-		sum += sum_array(bench->array, bench->array_size / 2);
-	}
-	
-	/* 
-	 * Writing to a global volatile variable separated with a cc-barrier
-	 * should discourage the compiler from optimizing away sum_array()s.
-	 */
-	compiler_barrier();
-	dummy = sum;
+		int val = 0;
+		__SYSCALL1(SYS_FUTEX_WAKEUP, (sysarg_t) &val);
+		__SYSCALL1(SYS_FUTEX_SLEEP, (sysarg_t) &val);
+	}
 }
 
@@ -179,5 +151,5 @@
 }
 
-static const char *results_txt = "/tmp/rcu-bench-results.txt";
+static const char *results_txt = "/tmp/urcu-bench-results.txt";
 
 static bool open_results(void)
@@ -211,6 +183,6 @@
 	printf("rcubench [test-name] [k-iterations] [n-threads] {work-size}\n");
 	printf("Available tests: \n");
-	printf("  ke-futex .. threads down/up a shared futex and do some work when\n");
-	printf("              in critical section; do a little less work outside CS.\n");
+	printf("  sys-futex.. threads make wakeup/sleepdown futex syscalls in a loop\n");
+	printf("              but for separate variables/futex kernel objects.\n");
 	printf("  lock     .. threads lock/unlock separate futexes.\n");
 	printf("  sema     .. threads down/up separate futexes.\n");
@@ -232,5 +204,5 @@
 	futex_initialize(&bench->bench_fut, 1);
 	
-	if (0 == str_cmp(argv[1], "ke-futex")) {
+	if (0 == str_cmp(argv[1], "sys-futex")) {
 		bench->func = kernel_futex_bench;
 	} else if (0 == str_cmp(argv[1], "lock")) {