BBB (ubuntu 13.04 armhf) vs raspi performance - nbyte benchmark

Dear all,

First of all, as it is my first post, I’d like to say ‘hello’ to everyone in this group. And now, let’s get on with it!

I got my BBB black yesterday. As I’m a bit more familiar with Ubuntu than other Linux distributions, I downloaded an image of 13.04 here and decided to run some basic tests. To get some common ground for comparison with the raspi which I also own, I’ve decided to run the BYTEmark benchmark, as there’s publicly available results for standard and overclocked raspi. Here’s what the BBB scored:

BYTEmark* Native Mode Benchmark ver. 2 (10/95)
Index-split by Andrew D. Balsa (11/97)
Linux/Unix* port by Uwe F. Mayer (12/96,11/97)

TEST : Iterations/sec. : Old Index : New Index
: : Pentium 90* : AMD K6/233*
--------------------:------------------:-------------:------------
NUMERIC SORT : 551.68 : 14.15 : 4.65
STRING SORT : 55.076 : 24.61 : 3.81
BITFIELD : 1.6515e+08 : 28.33 : 5.92
FP EMULATION : 65.88 : 31.61 : 7.29
FOURIER : 1560.2 : 1.77 : 1.00
ASSIGNMENT : 8.1317 : 30.94 : 8.03
IDEA : 1485.7 : 22.72 : 6.75
HUFFMAN : 753.37 : 20.89 : 6.67
NEURAL NET : 1.8208 : 2.93 : 1.23
LU DECOMPOSITION : 75.22 : 3.90 : 2.81
==========================ORIGINAL BYTEMARK RESULTS==========================
INTEGER INDEX : 23.995
FLOATING-POINT INDEX: 2.725
Baseline (MSDOS*) : Pentium* 90, 256 KB L2-cache, Watcom* compiler 10.0
==============================LINUX DATA BELOW===============================
CPU : ARMv7 Processor rev 2 (v7l)
L2 Cache :
OS : Linux 3.8.13-bone20
C compiler : gcc version 4.7.3 (Ubuntu/Linaro 4.7.3-1ubuntu1)
libc : libc-2.17.so
MEMORY INDEX : 5.656
INTEGER INDEX : 6.250
FLOATING-POINT INDEX: 1.511
Baseline (LINUX) : AMD K6/233*, 512 KB L2-cache, gcc 2.7.2.3, libc-5.4.38

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What’s really puzzling me is the poor FP performance when compared to the Broadcom chip mounted on the pi. Any thoughts?

Regards,
M.

Yeah some thoughts, but missing details on your end....

Which cpuspeed/governor is enabled?

Compiler settings when you built nbench? etc...

Regards,