2
edits
Changes
→[0.2] Install an armv7 glibc and re-run the benchmark using dhrystone
The Dhrystone (DMIPS) results never changed. The benchmark brought the same, exact number of DMIPS. Although Dhrystone does make use of C library functions and is assumed that the glibc would have effects on the program; the results proved that upgrading the glibc did not bring what's expected.
It is proven that armv7 and armv5 arch optimizations provide the same level of performance especially when running C library dependent programs on cdot-beagleXM-0-3 builder. Why is it possible when armv7 architecture is supposed to be better than armv5tel? One big answer is that the system tested currently is built to use an [http://en.wikipedia.org/wiki/Application_binary_interface ABI] called "softfp". Although beagleboardXM (cortex-a8)supports the "hard floating-point" ABI, The Fedora-ARM currently can't afford to waste time in recompiling the packages to support "hardfp". To make things a little clearer, cdot-beagleXM-0-3 can't use the technology offered by ARM-cortex-a8 processor because of how the system (down to the lowest level) is built.
