[llvm-commits] [test-suite] r121239 - in /test-suite/trunk/MultiSource/Examples/Noisy: ./ Makefile noisy.c

[Daniel Dunbar]

Author: ddunbar
Date: Wed Dec  8 01:28:17 2010
New Revision: 121239

URL: http://llvm.org/viewvc/llvm-project?rev=121239&view=rev
Log:
nt: Add a silly example test useful for testing noise estimation stuff.

Added:
    test-suite/trunk/MultiSource/Examples/Noisy/
    test-suite/trunk/MultiSource/Examples/Noisy/Makefile
    test-suite/trunk/MultiSource/Examples/Noisy/noisy.c

Added: test-suite/trunk/MultiSource/Examples/Noisy/Makefile
URL: http://llvm.org/viewvc/llvm-project/test-suite/trunk/MultiSource/Examples/Noisy/Makefile?rev=121239&view=auto
==============================================================================
--- test-suite/trunk/MultiSource/Examples/Noisy/Makefile (added)
+++ test-suite/trunk/MultiSource/Examples/Noisy/Makefile Wed Dec  8 01:28:17 2010
@@ -0,0 +1,5 @@
+LEVEL = ../../..
+PROG = Noisy
+CPPFLAGS = 
+LDFLAGS =
+include ../../Makefile.multisrc

Added: test-suite/trunk/MultiSource/Examples/Noisy/noisy.c
URL: http://llvm.org/viewvc/llvm-project/test-suite/trunk/MultiSource/Examples/Noisy/noisy.c?rev=121239&view=auto
==============================================================================
--- test-suite/trunk/MultiSource/Examples/Noisy/noisy.c (added)
+++ test-suite/trunk/MultiSource/Examples/Noisy/noisy.c Wed Dec  8 01:28:17 2010
@@ -0,0 +1,30 @@
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+double get_time() {
+  return (double) clock() / CLOCKS_PER_SEC;
+}
+
+int cmp(const void *a, const void *b) {
+  return 0;
+}
+
+int main() {
+  static int big_array[1 << 12] = { 0 };
+  double base_time = .2, noise_range = .1;
+  double delay, start_time;
+
+  srand48(clock());
+  delay = base_time + noise_range * drand48();
+
+  // We spin here to make sure we consume user time.
+  start_time = get_time();
+  while (get_time() < start_time + delay) {
+    // Ok until someone on the backend gets crazy.
+    qsort(big_array, sizeof(big_array) / sizeof(big_array[0]),
+          sizeof(big_array[0]), cmp);
+  }
+
+  return 0;
+}