From 353f69c9edaab368a44746ecba8c2bf2cda8e4d9 Mon Sep 17 00:00:00 2001
From: Keith Alcock <github@keithalcock.com>
Date: Wed, 1 Jul 2020 11:21:53 -0700
Subject: [PATCH] Modify test to show it periodically failing

---
 tests/test-exec-dynamic.cc | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/tests/test-exec-dynamic.cc b/tests/test-exec-dynamic.cc
index 23b5b6971..f18916c2c 100644
--- a/tests/test-exec-dynamic.cc
+++ b/tests/test-exec-dynamic.cc
@@ -109,15 +109,18 @@ BOOST_AUTO_TEST_CASE( param_after_node_2 ) {
 }
 
 BOOST_AUTO_TEST_CASE( multi_lstm ) {
-  vector<vector<float>> results(4);
+  const int threadCount = 8;
+
+  vector<vector<float>> results(threadCount);
   dynet::ParameterCollection mod;
   dynet::VanillaLSTMBuilder lstm_proto(2, 3, 10, mod);
   dynet::LookupParameter lp_proto = mod.add_lookup_parameters(10, {3});
   dynet::autobatch_flag = 0;
   
-  vector<thread> threads(4);
-  for (size_t t = 0; t < 4; ++t) {
+  vector<thread> threads(threadCount);
+  for (size_t t = 0; t < threadCount; ++t) {
     threads[t] = thread([&, t]() {
+      cout << "Starting thread " << t << endl;
       dynet::ComputationGraph cg;
       dynet::VanillaLSTMBuilder lstm(lstm_proto);
       dynet::LookupParameter lp(lp_proto);
@@ -135,11 +138,12 @@ BOOST_AUTO_TEST_CASE( multi_lstm ) {
       losses.push_back(losses[0] + losses[2]);
       Expression z = dynet::sum(losses);
       results[t].push_back(as_scalar(z.value()));
+      cout << "Finishing thread " << t << endl;
     });
   }
 
-  for (size_t t = 0; t < 4; ++t) { threads[t].join(); }
-  for (size_t t = 0; t < 4; ++t) {
+  for (size_t t = 0; t < threadCount; ++t) { threads[t].join(); }
+  for (size_t t = 0; t < threadCount; ++t) {
     for(size_t i = 1; i < results[t].size(); ++i) {
       BOOST_CHECK_CLOSE(results[t][0], results[t][i], 0.0001);
     }