benches/inger.rs: Make resume benchmark reuse functions so it no longer runs out of libsets

The launch and resume benchmarks now run to successful completion, both with and without global
variable interposition, provided libgotcha and the dynamic linker support 511 libsets.

Author: solb

benches/inger.rs

@@ -63,21 +63,22 @@ fn launch(lo: &mut Bencher) {
 fn resume(lo: &mut Bencher) {
 	use inger::launch;
 	use inger::resume;
+	use std::sync::atomic::AtomicBool;
 
+	let run = AtomicBool::from(true);
 	let during = AtomicU64::default();
-	let mut lingers: Vec<_> = (0..LIBSETS).map(|_| launch(|| {
+	let mut lingers: Vec<_> = (0..LIBSETS).map(|_| launch(|| while run.load(Ordering::Relaxed) {
 		pause();
 		during.store(nsnow(), Ordering::Relaxed);
 	}, u64::max_value()).unwrap()).collect();
+	let nlingers = lingers.len();
 
 	let mut into = 0;
 	let mut outof = 0;
 	let mut index = 0;
 	lo.iter(|| {
-		assert!(index < lingers.len(), "LIBSETS tunable set too low!");
-
 		let before = nsnow();
-		resume(&mut lingers[index], u64::max_value()).unwrap();
+		resume(&mut lingers[index % nlingers], u64::max_value()).unwrap();
 
 		let after = nsnow();
 		let during = during.load(Ordering::Relaxed);
@@ -94,7 +95,8 @@ fn resume(lo: &mut Bencher) {
 		writeln!(file, "(ran for {} iterations)", index).unwrap();
 	}
 
-	for linger in &mut lingers[index..] {
+	run.store(false, Ordering::Relaxed);
+	for linger in &mut lingers {
 		resume(linger, u64::max_value()).unwrap();
 	}
 }