Did you try to look at ASM of the function in question? Do you compile to thumb? Multiplication sometimes generates function calls in thumb. Try marking the scaling function as arm explicitly Le 2015-02-24 10:39, "Michael Zimmermann" <sigmaepsilo...@gmail.com> a écrit :
> Any ideas what could slow down the image scaling algorithm? > The only reasons I could think of would either be slow memory or some > compiler problems. Since my Ram is mapped cachable I don't think the > RAM is too slow. > > I even forces using the Nearest neighbor algorithm already. It speeds > things up a lot but it's not as fast as you'd expect. > > Some technical info: > ARMv7 > Linaro GCC 4.9 > MMU setup is done by the previous bootloader(I disabled GRUB's (uboot) > MMU setup - it prooved to be faster) > > _______________________________________________ > Grub-devel mailing list > Grub-devel@gnu.org > https://lists.gnu.org/mailman/listinfo/grub-devel >
_______________________________________________ Grub-devel mailing list Grub-devel@gnu.org https://lists.gnu.org/mailman/listinfo/grub-devel
