On 9/10/2012 10:45 AM, Michael Haberler wrote: > here's linpack figures for the Rpi and an Intel D525. > > the D5252 is almost a factor of 6 faster than the Rpi for this benchmark > > (pull test code with wget http://www.netlib.org/benchmark/linpackc.new) > > pi@raspberrypi ~/tests $ gcc -O linpackc.c -lm -olinpackc > pi@raspberrypi ~/tests $ ./linpackc > Enter array size (q to quit) [200]: > Memory required: 315K. > > > LINPACK benchmark, Double precision. > Machine precision: 15 digits. > Array size 200 X 200. > Average rolled and unrolled performance: > > Reps Time(s) DGEFA DGESL OVERHEAD KFLOPS > ---------------------------------------------------- > 16 0.66 90.91% 3.03% 6.06% 35440.860 > 32 1.33 88.72% 3.01% 8.27% 36021.858 > 64 2.64 88.26% 2.65% 9.09% 36622.222 > 128 5.28 89.58% 3.22% 7.20% 35874.830 > 256 10.56 88.92% 3.12% 7.95% 36170.096 > > > mah@atom:~/src$ gcc -O linpackc.c -lm > linpackc.c: In function 'main': > linpackc.c:78: warning: ignoring return value of '€˜fgets'€™, declared with > attribute warn_unused_result > mah@atom:~/src$ ./a.out > Enter array size (q to quit) [200]: > Memory required: 315K. > > > LINPACK benchmark, Double precision. > Machine precision: 15 digits. > Array size 200 X 200. > Average rolled and unrolled performance: > > Reps Time(s) DGEFA DGESL OVERHEAD KFLOPS > ---------------------------------------------------- > 128 0.96 86.46% 3.12% 10.42% 204403.101 > 256 1.91 87.96% 1.05% 10.99% 206807.843 > 512 3.82 87.43% 2.62% 9.95% 204403.101 > 1024 7.63 87.68% 2.36% 9.96% 204700.631 > 2048 15.26 87.42% 2.82% 9.76% 204254.660 > > > > > > Am 09.09.2012 um 23:35 schrieb Jon Elson: > >> Kent A. Reed wrote: >> <...> >>> You've mentioned floating-point performance in the past. Do we have any >>> benchmarking for that? >>> >> There certainly are standard benchmarks that can be run on Linux systems >> that could be >> quite useful. I haven't seen anybody post numbers, but likely they >> already exist on >> the web, somewhere. A quick search didn't show any published results >> comparing >> say, the Beagle Board's OMAP 3430 against an Intel Atom, for instance, >> which would >> be a good comparison. >> >> <...>
Thanks, Michael. I'm *still* waiting for my RPi so I spent some time looking up benchmarking info regarding ARM vs the world. (Caveat: I know very well that benchmarking is the art of lying with confidence.) Because of my FORTRAN upbringing I have a tendency to rely on the Whetstone benchmark but the choice of suite may not matter as much as the choice of compiler, even more so with ARMs because of the compromises made by software folks with different versions of the instruction set. To start, are you running Raspbian Linux or Debian Linux? versions? I will kick in the benchmarks I run on my BeagleBoardXM and ASUS AT5NM10-I while I wait. Regards, Kent ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
