Contents - Raspberry PI Community Projects

CPU
Linpack
The Arm has been tested using the linpack benchmark from [1] (http://www.netlib.org/
benchmark/linpackc.new) , built with gcc with -O3 (Optimisation level 3). Run with
array size 200.
With software floating point
Source
[2] (http://www.netlib.org/benchmark/linpackc.new)
Compile/Run
cc -O3 -o linpack linpack.c -lm
linpack.c: In function ‘main’:
linpack.c:69: warning: return type of ‘main’ is not ‘int’
./linpack
Enter array size (q to quit) [200]: 200
Results
Crippled
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
2 0.53 92.45% 1.89% 5.66% 5493.333
4 1.07 92.52% 2.80% 4.67% 5385.621
8 2.12 92.45% 2.36% 5.19% 5466.003
16 4.24 92.45% 2.83% 4.72% 5438.944
32 8.49 92.11% 2.71% 5.18% 5459.213
64 16.98 92.05% 2.89% 5.06% 5452.440
Hardware floating point (-mfloat-abi=softfp)
Memory required: 315K.
LINPACK benchmark, Double precision.