Snap for 8512216 from bc0f5df265caa21a2120c22453655a7fcc941991 to tm-frc-permission-releaset_frc_per_330444010android13-frc-permission-release

Change-Id: I14c5e3861b62897267cccac7dacced34d75e0a5b

1 files changed, 78 insertions, 5 deletions

diff --git a/unsupported/test/cxx11_non_blocking_thread_pool.cpp b/unsupported/test/cxx11_non_blocking_thread_pool.cpp
index 5f9bb938b..993ee1789 100644
--- a/unsupported/test/cxx11_non_blocking_thread_pool.cpp
+++ b/unsupported/test/cxx11_non_blocking_thread_pool.cpp
@@ -11,22 +11,23 @@
 #define EIGEN_USE_THREADS
 #include "main.h"
 #include "Eigen/CXX11/ThreadPool"
+#include "Eigen/CXX11/Tensor"
 
 static void test_create_destroy_empty_pool()
 {
   // Just create and destroy the pool. This will wind up and tear down worker
   // threads. Ensure there are no issues in that logic.
   for (int i = 0; i < 16; ++i) {
-    NonBlockingThreadPool tp(i);
+    ThreadPool tp(i);
   }
 }
 
 
-static void test_parallelism()
+static void test_parallelism(bool allow_spinning)
 {
   // Test we never-ever fail to match available tasks with idle threads.
   const int kThreads = 16;  // code below expects that this is a multiple of 4
-  NonBlockingThreadPool tp(kThreads);
+  ThreadPool tp(kThreads, allow_spinning);
   VERIFY_IS_EQUAL(tp.NumThreads(), kThreads);
   VERIFY_IS_EQUAL(tp.CurrentThreadId(), -1);
   for (int iter = 0; iter < 100; ++iter) {
@@ -100,8 +101,80 @@ static void test_parallelism()
   }
 }
 
-void test_cxx11_non_blocking_thread_pool()
+
+static void test_cancel()
+{
+  ThreadPool tp(2);
+
+  // Schedule a large number of closure that each sleeps for one second. This
+  // will keep the thread pool busy for much longer than the default test timeout.
+  for (int i = 0; i < 1000; ++i) {
+    tp.Schedule([]() {
+      std::this_thread::sleep_for(std::chrono::milliseconds(2000));
+    });
+  }
+
+  // Cancel the processing of all the closures that are still pending.
+  tp.Cancel();
+}
+
+static void test_pool_partitions() {
+  const int kThreads = 2;
+  ThreadPool tp(kThreads);
+
+  // Assign each thread to its own partition, so that stealing other work only
+  // occurs globally when a thread is idle.
+  std::vector<std::pair<unsigned, unsigned>> steal_partitions(kThreads);
+  for (int i = 0; i < kThreads; ++i) {
+    steal_partitions[i] = std::make_pair(i, i + 1);
+  }
+  tp.SetStealPartitions(steal_partitions);
+
+  std::atomic<int> running(0);
+  std::atomic<int> done(0);
+  std::atomic<int> phase(0);
+
+  // Schedule kThreads tasks and ensure that they all are running.
+  for (int i = 0; i < kThreads; ++i) {
+    tp.Schedule([&]() {
+      const int thread_id = tp.CurrentThreadId();
+      VERIFY_GE(thread_id, 0);
+      VERIFY_LE(thread_id, kThreads - 1);
+      ++running;
+      while (phase < 1) {
+      }
+      ++done;
+    });
+  }
+  while (running != kThreads) {
+  }
+  // Schedule each closure to only run on thread 'i' and verify that it does.
+  for (int i = 0; i < kThreads; ++i) {
+    tp.ScheduleWithHint(
+        [&, i]() {
+          ++running;
+          const int thread_id = tp.CurrentThreadId();
+          VERIFY_IS_EQUAL(thread_id, i);
+          while (phase < 2) {
+          }
+          ++done;
+        },
+        i, i + 1);
+  }
+  running = 0;
+  phase = 1;
+  while (running != kThreads) {
+  }
+  running = 0;
+  phase = 2;
+}
+
+
+EIGEN_DECLARE_TEST(cxx11_non_blocking_thread_pool)
 {
   CALL_SUBTEST(test_create_destroy_empty_pool());
-  CALL_SUBTEST(test_parallelism());
+  CALL_SUBTEST(test_parallelism(true));
+  CALL_SUBTEST(test_parallelism(false));
+  CALL_SUBTEST(test_cancel());
+  CALL_SUBTEST(test_pool_partitions());
 }