stream_c results for Mac Pro

Hi John

Thanks for maintaining your site and the stream benchmark.

Here are results for my Mac Pro, running SnowLeopard (OS X 10.6.1).

Cheers,

Stefan Ludwig

   Model Name: Mac Pro
   Model Identifier: MacPro4,1
   Processor Name: Quad-Core Intel Xeon
   Processor Speed: 2.66 GHz
   Number Of Processors: 1
   Total Number Of Cores: 4
   L2 Cache (per core): 256 KB
   L3 Cache: 8 MB
   Memory: 8 GB (4 x 2GB, DDR3 at 1066 Mbps)

$ make clean all run
rm -f stream_c *.o
gcc -O2 stream.c -o stream_c
./stream_c
-------------------------------------------------------------
STREAM version $Revision: 5.9 $
-------------------------------------------------------------
This system uses 8 bytes per DOUBLE PRECISION word.
-------------------------------------------------------------
Array size = 2000000, Offset = 0
Total memory required = 45.8 MB.
Each test is run 10 times, but only
the *best* time for each is used.
-------------------------------------------------------------
Printing one line per active thread....
-------------------------------------------------------------
Your clock granularity/precision appears to be 1 microseconds.
Each test below will take on the order of 4095 microseconds.
    (= 4095 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 Rate (MB/s) Avg time Min time Max time
Copy: 7396.9539 0.0044 0.0043 0.0046
Scale: 6988.6867 0.0047 0.0046 0.0048
Add: 7358.4281 0.0066 0.0065 0.0067
Triad: 7070.2930 0.0069 0.0068 0.0073
-------------------------------------------------------------
Solution Validates
-------------------------------------------------------------

$ gcc -v
Using built-in specs.
Target: i686-apple-darwin10
Configured with: /var/tmp/gcc/gcc-5646~6/src/configure --disable-
checking --enable-werror --prefix=/usr --mandir=/share/man --enable-
languages=c,objc,c++,obj-c++ --program-transform-name=/^[cg][^.-]*$/s/
$/-4.2/ --with-slibdir=/usr/lib --build=i686-apple-darwin10 --with-gxx-
include-dir=/include/c++/4.2.1 --program-prefix=i686-apple-darwin10- --
host=x86_64-apple-darwin10 --target=i686-apple-darwin10
Thread model: posix
gcc version 4.2.1 (Apple Inc. build 5646)


Received on Sat Oct 24 11:37:12 2009