1 files changed, 77 insertions, 0 deletions

diff --git a/nacl/cpucycles/test.c b/nacl/cpucycles/test.c
new file mode 100644
index 00000000..bc43d719
--- /dev/null
+++ b/nacl/cpucycles/test.c
@@ -0,0 +1,77 @@
+#include <time.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/time.h>
+#include "cpucycles-impl.h"
+
+static long long tod(void)
+{
+  struct timeval t;
+  gettimeofday(&t,(struct timezone *) 0);
+  return t.tv_sec * (long long) 1000000 + t.tv_usec;
+}
+
+long long todstart;
+long long todend;
+long long cpustart;
+long long cpuend;
+
+long long cyclespersecond;
+long long cyclespertod;
+
+long long t[1001];
+
+int main()
+{
+  int j;
+  int i;
+
+  if (!cpucycles()) {
+    fprintf(stderr,"cpucycles() = %lld\n",cpucycles());
+    return 100;
+  }
+  for (i = 0;i <= 1000;++i) t[i] = cpucycles();
+  for (i = 0;i < 1000;++i) if (t[i] > t[i + 1]) {
+    fprintf(stderr,"t[%d] = %lld\n",i,t[i]);
+    fprintf(stderr,"t[%d] = %lld\n",i + 1,t[i + 1]);
+    fprintf(stderr,"cpucycles_persecond() = %lld\n",cpucycles_persecond());
+    return 100;
+  }
+  if (t[0] == t[1000]) {
+    fprintf(stderr,"t[%d] = %lld\n",0,t[0]);
+    fprintf(stderr,"t[%d] = %lld\n",1000,t[1000]);
+    fprintf(stderr,"cpucycles_persecond() = %lld\n",cpucycles_persecond());
+    return 100;
+  } 
+
+  cyclespersecond = cpucycles_persecond();
+
+  if (cyclespersecond <= 0) {
+    fprintf(stderr,"cpucycles_persecond() = %lld\n",cyclespersecond);
+    return 100;
+  }
+
+  todstart = tod();
+  cpustart = cpucycles();
+  for (j = 0;j < 1000;++j) for (i = 0;i <= 1000;++i) t[i] = t[i] + i + j;
+  todend = tod();
+  cpuend = cpucycles();
+
+  todend -= todstart;
+  cpuend -= cpustart;
+
+  cyclespertod = (long long) (((double) cpuend) * 1000000.0 / (double) todend);
+
+  if (cyclespertod > 10 * cyclespersecond) {
+    fprintf(stderr,"cyclespertod = %lld, cyclespersecond = %lld\n",cyclespertod,cyclespersecond);
+    return 100;
+  }
+
+  for (i = 0;i <= 1000;++i) t[i] = cpucycles();
+  printf("%s",cpucycles_implementation);
+  printf(" %lld",cyclespersecond);
+  printf(" %lld",cyclespertod);
+  for (i = 0;i < 64;++i) printf(" %lld",t[i + 1] - t[i]);
+  printf("\n");
+  return 0;
+}