From a9bf367d6eab33617c3d6019d5b07c330cd5da64 Mon Sep 17 00:00:00 2001
From: Christian Mazakas <christian.mazakas@gmail.com>
Date: Tue, 2 May 2023 15:44:21 -0700
Subject: [PATCH] Test if being the kind of program that calls yield() pays
 dividends for flaky CI failures

---
 test/cfoa/swap_tests.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/test/cfoa/swap_tests.cpp b/test/cfoa/swap_tests.cpp
index 40180168..9fae85cd 100644
--- a/test/cfoa/swap_tests.cpp
+++ b/test/cfoa/swap_tests.cpp
@@ -191,6 +191,7 @@ namespace {
           if (idx % 100 == 0) {
             cv.notify_all();
           }
+          std::this_thread::yield();
         }
 
         done1 = true;
@@ -201,6 +202,7 @@ namespace {
 
         for (auto const& val : vals2) {
           x2.insert(val);
+          std::this_thread::yield();
         }
 
         done2 = true;
@@ -214,6 +216,7 @@ namespace {
           }
           x1.swap(x2);
           ++num_swaps;
+          std::this_thread::yield();
         } while (!done1 && !done2);
       });