Wolfgang, On 12/17/2010 02:21 PM, Wolfgang Denk wrote: > Dear Rob Herring, > > In message<[email protected]> you > wrote: >> From: Rob Herring<[email protected]> >> >> swab functions are heavily used by FDT code, so enable >> optimized assembly code for ARMv6 and later. >> >> Signed-off-by: Rob Herring<[email protected]> >> --- >> arch/arm/include/asm/byteorder.h | 16 ++++++++++++++++ >> 1 files changed, 16 insertions(+), 0 deletions(-) > > Do you have any numbers if this changes gives any measurable > improvement?
I have an instruction trace capture and see repeated calls to swab32 by the fdt code. It's an obvious low hanging fruit. The boot time for device tree vs. non-device tree is noticeably longer, but I don't have any formal measurements. Rob _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
