From ae2e61c7648ab0164cc79ff02a77b5a25f02987c Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Mon, 27 Jul 2015 15:52:27 -0600
Subject: [PATCH] OS test: improve the sporadic scheduler test by waiting for a
 bit in the 'nuisance' thread

---
 examples/ostest/sporadic.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/examples/ostest/sporadic.c b/examples/ostest/sporadic.c
index 5d4049543..48677afc9 100644
--- a/examples/ostest/sporadic.c
+++ b/examples/ostest/sporadic.c
@@ -73,13 +73,35 @@ static time_t g_start_time;
  * Private Functions
  ***********************************************************************/
 
+void my_mdelay(unsigned int milliseconds)
+{
+  volatile unsigned int i;
+  volatile unsigned int j;
+
+  for (i = 0; i < milliseconds; i++)
+    {
+      for (j = 0; j < CONFIG_BOARD_LOOPSPERMSEC; j++)
+        {
+        }
+    }
+}
 static void *nuisance_func(void *parameter)
 {
+  /* Synchronized start */
+
   while (sem_wait(&g_sporadic_sem) < 0);
 
+  /* Sleep until we are cancelled */
+
   for (;;)
     {
+      /* Sleep gracefully for awhile */
+
       usleep(500*1000);
+
+      /* Then hog some CPU time */
+
+      my_mdelay(100);
     }
 
   return NULL;