1 files changed, 68 insertions, 0 deletions
diff --git a/fastos/src/tests/usecputest.cpp b/fastos/src/tests/usecputest.cpp
new file mode 100644
index 00000000000..3ddc46aaa7e
--- /dev/null
+++ b/fastos/src/tests/usecputest.cpp
@@ -0,0 +1,68 @@
+// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+#include <vespa/fastos/fastos.h>
+#include "tests.h"
+
+class ThreadRunJob;
+void UseSomeCpu(int i, ThreadRunJob *threadRunJob);
+
+class ThreadRunJob : public FastOS_Runnable
+{
+public:
+   int64_t UseSomeCpu2(int64_t someNumber)
+   {
+      return someNumber + (someNumber/2 + someNumber*4) +
+         someNumber * someNumber * someNumber;
+   }
+
+   void Run (FastOS_ThreadInterface *thisThread, void *arg)
+   {
+      (void)thisThread;
+      (void)arg;
+
+      FastOS_Time before, current;
+      before.SetNow();
+
+      for(int i=0; i<200000; i++)
+      {
+         if((i % 200) == 0)
+         {
+            current.SetNow();
+            current -= before;
+            if(current.MilliSecs() > 3000)
+              break;
+         }
+         UseSomeCpu(i, this);
+      }
+      delete (this);
+   }
+};
+
+class UseCpuTest : public BaseTest
+{
+public:
+   int Main ()
+   {
+      FastOS_ThreadPool pool(128*1024);
+      pool.NewThread(new ThreadRunJob());
+      pool.NewThread(new ThreadRunJob());
+      pool.NewThread(new ThreadRunJob());
+      pool.NewThread(new ThreadRunJob());
+      pool.Close();
+      return 0;
+   }
+};
+
+void UseSomeCpu (int i, ThreadRunJob *threadRunJob)
+{
+   int64_t lastVal = i;
+   for(int e=0; e<100; e++)
+      lastVal = threadRunJob->UseSomeCpu2(lastVal);
+}
+
+int main (int argc, char **argv)
+{
+   UseCpuTest app;
+   setvbuf(stdout, NULL, _IOLBF, 8192);
+   return app.Entry(argc, argv);
+}
+