apu vs macchiatobin

matteo@apu:~/benchs$ make run
./dry 2>/dev/null
Dhrystone Benchmark, Version C, Version 2.3
Program compiled without 'register' attribute
Using clock_gettime(), HZ=1000

Running 1 thread(s)

Microseconds for one run through Dhrystone:     0.2
Dhrystones per Second:                          4555394
./flops

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

   Module     Error        RunTime      MFLOPS
                            (usec)
     1      4.0146e-13      0.0311    450.0079
     2     -1.4166e-13      0.0150    465.9566
     3      4.7184e-14      0.0286    594.0002
     4     -1.2557e-13      0.0352    426.6526
     5     -1.3800e-13      0.0673    430.8670
     6      3.2380e-13      0.0531    545.6429
     7     -8.4583e-11      0.0612    196.2192
     8      3.4867e-13      0.0532    563.6808

   Iterations      =  512000000
   NullTime (usec) =     0.0000
   MFLOPS(1)       =   501.2830
   MFLOPS(2)       =   330.4590
   MFLOPS(3)       =   442.8004
   MFLOPS(4)       =   534.8321


matteo@macchiatobin:~/benchs$ make run
./dry 2>/dev/null
Dhrystone Benchmark, Version C, Version 2.3
Program compiled without 'register' attribute
Using clock_gettime(), HZ=1000

Running 1 thread(s)

Microseconds for one run through Dhrystone:     0.1
Dhrystones per Second:                          20193860
./flops

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

   Module     Error        RunTime      MFLOPS
                            (usec)
     1      4.0146e-13      0.0080   1749.6233
     2     -1.4166e-13      0.0061   1142.5937
     3      4.7184e-14      0.0074   2287.2820
     4     -1.2546e-13      0.0079   1894.2127
     5     -1.3800e-13      0.0147   1968.4418
     6      3.2374e-13      0.0128   2270.7655
     7     -8.4583e-11      0.0240    499.8931
     8      3.4855e-13      0.0143   2102.0712

   Iterations      =  512000000
   NullTime (usec) =     0.0000
   MFLOPS(1)       =  1366.1036
   MFLOPS(2)       =  1034.8795
   MFLOPS(3)       =  1637.9972
   MFLOPS(4)       =  2146.5341


matteo@apu:~$ time { dd if=/dev/zero bs=1G count=1 status=none | sha1sum ; }
2a492f15396a6768bcbca016993f4b4c8b0b5307  -

real    0m16.611s
user    0m12.438s
sys     0m7.397s

matteo@macchiatobin:~$ time { dd if=/dev/zero bs=1G count=1 status=none | sha1sum ; }
2a492f15396a6768bcbca016993f4b4c8b0b5307  -

real    0m5,204s
user    0m4,468s
sys     0m1,193s