rm -f *.exe *.o
gcc -O3    -c -o mysecond.o mysecond.c
gcc -O3  -c mysecond.c
gfortran -O3 -DSTREAM_ARRAY_SIZE=80000000 -DNTIMES=20   -c stream.f
gfortran -O3 stream.o mysecond.o -o stream_f.exe
gcc -O3  -DSTREAM_ARRAY_SIZE=80000000 -DNTIMES=20  stream.c -o stream_c.exe
gcc -O3  -DUNIX flops.c -o flops.exe
./stream_c.exe
-------------------------------------------------------------
STREAM version $Revision: 5.10 $
-------------------------------------------------------------
This system uses 8 bytes per array element.
-------------------------------------------------------------
Array size = 80000000 (elements), Offset = 0 (elements)
Memory per array = 610.4 MiB (= 0.6 GiB).
Total memory required = 1831.1 MiB (= 1.8 GiB).
Each kernel will be executed 20 times.
 The *best* time for each kernel (excluding the first iteration)
 will be used to compute the reported bandwidth.
-------------------------------------------------------------
Your clock granularity/precision appears to be 1 microseconds.
Each test below will take on the order of 59858 microseconds.
   (= 59858 clock ticks)
Increase the size of the arrays if this shows that
you are not getting at least 20 clock ticks per test.
-------------------------------------------------------------
WARNING -- The above is only a rough guideline.
For best results, please be sure you know the
precision of your system timer.
-------------------------------------------------------------
Function    Best Rate MB/s  Avg time     Min time     Max time
Copy:           23508.2     0.063228     0.054449     0.074427
Scale:          18323.7     0.089940     0.069855     0.116932
Add:            19762.6     0.276166     0.097153     3.054857
Triad:          19559.9     0.123390     0.098160     0.156530
-------------------------------------------------------------
Solution Validates: avg error less than 1.000000e-13 on all three arrays
-------------------------------------------------------------
./flops.exe

   FLOPS C Program (Double Precision), V2.0 18 Dec 1992

   Module     Error        RunTime      MFLOPS
                            (usec)
     1      4.0146e-13      0.0029   4831.3737
     2     -1.4166e-13      0.0006  11258.2969
     3      4.7184e-14      0.0031   5448.3769
     4     -1.2557e-13      0.0030   5042.5895
     5     -1.3800e-13      0.0060   4867.7339
     6      3.2380e-13      0.0054   5322.4399
     7     -8.4583e-11      0.0031   3907.7854
     8      3.4867e-13      0.0056   5323.6214

   Iterations      =  512000000
   NullTime (usec) =     0.0000
   MFLOPS(1)       =  8348.0311
   MFLOPS(2)       =  4650.8807
   MFLOPS(3)       =  5016.3434
   MFLOPS(4)       =  5297.2428