That sounds similar to what Konstantinos found compiling with and without hard float ABI for ARMv7 architecture.
Dave On 18/07/12 14:52, Wookey wrote: > +++ Michael Hope [2012-07-18 14:37 +1200]: >> The Raspbian project is a rebuild of Debian for the Raspberry Pi. >> adama did some benchmarks that show the improvement in going from >> ARMv4T with soft float to ARMv6 with hard float: >> http://www.memetic.org/raspbian-benchmarking-armel-vs-armhf/ >> >> The page says that there's a 4-10 % improvement on integer programs >> and up to 40 % on floating point programs. It's hard to tell the new >> instruction vs pipeline influence and if the baseline is soft float or >> softfp/VFP based. > > He said he used debian armel which is soft-float by default, but > packages can specify a softfp/vfp build if they wish (I don't know if > any do). The tests also don't say anything about controlling for the > version of gcc in use. Random binaries in debian armel could have been > built with an older gcc than the one used to build rasbian, depending > on how long ago they were last uploaded and exactly where he was > getting his packages from. > > So it's hard to know how much of the improvement is due to compiling > for v6 over v4t, soft-float vs vfp, armhf ABI vs armel ABI, and > possibly variation in gcc used. I suspect all of those are mixed in. > > Interesting nevertheless. > > Wookey > -- David Rusling, CTO Linaro Lockton House Clarendon Rd Cambridge CB2 8FH Linaro.org<http://www.linaro.org/> │ Open source software for ARM SoCs _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
