Measure one sending loop against a thread a link, with and without push (028)

Five rounds of 1,000 bursts by one link, four links and one wire, four
builds in turns: a thread a link (966b82f), those threads with push
(threads-push.patch), the loop (99b2219), the loop with push (94e7bb8).
Medians: one link 597k, 923k, 525k, 897k sends/s; four links 506k,
799k, 268k, 800k; the wire as it was, 789k to 794k.

1 files changed, 29 insertions, 0 deletions

diff --git a/research/experiments/028-one-sending-loop/src.aup b/research/experiments/028-one-sending-loop/src.aup
new file mode 100644
index 0000000..6bb9c42
--- /dev/null
+++ b/research/experiments/028-one-sending-loop/src.aup
@@ -0,0 +1,29 @@
+record Item {
+  k = 0
+}
+state items: list of Item
+input fill = message { k: u32 }
+input burst = message { step: u32 }
+input burst4 = message { step: u32 }
+output out = message { k: u32 }
+output o1 = message { k: u32 }
+output o2 = message { k: u32 }
+output o3 = message { k: u32 }
+output o4 = message { k: u32 }
+on fill {
+  items.append(Item { k: fill.k })
+}
+on burst {
+  for i in items {
+    send out { k: i.k + burst.step }
+  }
+}
+on burst4 {
+  for i in items {
+    send o1 { k: i.k + burst4.step }
+    send o2 { k: i.k + burst4.step }
+    send o3 { k: i.k + burst4.step }
+    send o4 { k: i.k + burst4.step }
+  }
+}
+view count = count(i in items where i.k > 0)