Fix rdtsc errors from core hopping causing bad timing results

git-svn-id: http://smhasher.googlecode.com/svn/trunk@91 77a7d1d3-4c08-bdc2-d393-d5859734b01a

1 files changed, 6 insertions, 3 deletions

diff --git a/SpeedTest.cpp b/SpeedTest.cpp
index a4ed8a7..16e183d 100644
--- a/SpeedTest.cpp
+++ b/SpeedTest.cpp
@@ -37,8 +37,11 @@ void BulkSpeedTest ( pfHash hash )
       blackhole(temp[0]);

 

       double cycles = double(end-begin);

-      double bpc = double(blocksize) / cycles;

-      if(bpc > bestbpc) bestbpc = bpc;

+      if(cycles > 0)

+      {

+        double bpc = double(blocksize) / cycles;

+        if(bpc > bestbpc) bestbpc = bpc;

+      }

     }

 

     double bestbps = (bestbpc * 3000000000.0 / 1048576.0);

@@ -94,7 +97,7 @@ void TinySpeedTest ( pfHash hash, int hashsize, int keysize, bool verbose, doubl
     //blackhole(*(uint32_t*)(&h));

 

     double cycles = double(end-begin) / 64;

-    if(cycles < bestcycles) bestcycles = cycles;

+    if((cycles > 0) && (cycles < bestcycles)) bestcycles = cycles;

   }

 

   double bestbpc = double(keysize) / bestcycles;