---

yaml
---
r: 20906
b: refs/heads/snap-stage3
c: a3dd67a
h: refs/heads/master
v: v3

Author: bblum

[refs]

@@ -1,7 +1,7 @@
 ---
 refs/heads/master: e430a699f2c60890d9b86069fd0c68a70ece7120
 refs/heads/snap-stage1: e33de59e47c5076a89eadeb38f4934f58a3618a6
-refs/heads/snap-stage3: 6bd01d0ac804a5a839a4513907b5697e35c8ad2e
+refs/heads/snap-stage3: a3dd67ae9165ee87c98ba7e5585ce859fd3fbe68
 refs/heads/try: ffbe0e0e00374358b789b0037bcb3a577cd218be
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/heads/ndm: f3868061cd7988080c30d6d5bf352a5a5fe2460b

branches/snap-stage3/src/test/bench/task-perf-jargon-metal-smoke.rs

@@ -5,16 +5,20 @@
 //
 // The filename is a song reference; google it in quotes.
 
-fn child_generation(gens_left: uint) {
+fn child_generation(gens_left: uint, -c: pipes::chan<()>) {
     // This used to be O(n^2) in the number of generations that ever existed.
     // With this code, only as many generations are alive at a time as tasks
     // alive at a time,
+    let c = ~mut some(c);
     do task::spawn_supervised {
+        let c = option::swap_unwrap(c);
         if gens_left & 1 == 1 {
             task::yield(); // shake things up a bit
         }
         if gens_left > 0 {
-            child_generation(gens_left - 1); // recurse
+            child_generation(gens_left - 1, c); // recurse
+        } else {
+            c.send(())
         }
     }
 }
@@ -28,5 +32,9 @@ fn main(args: ~[~str]) {
         copy args
     };
 
-    child_generation(uint::from_str(args[1]).get());
+    let (c,p) = pipes::stream();
+    child_generation(uint::from_str(args[1]).get(), c);
+    if p.try_recv().is_none() {
+        fail ~"it happened when we slumbered";
+    }
 }