[U-Boot] [PATCH V2] arm: Use optimized memcpy and memset from linux
Albert ARIBAUD
albert.aribaud at free.fr
Thu Mar 3 08:07:06 CET 2011
Hi Matthias,
Le 26/01/2011 11:45, Matthias Weisser a écrit :
> Using optimized versions of memset and memcpy from linux brings a quite
> noticeable speed (x2 or better) improvement for these two functions.
>
> Here are some numbers for test done with jadecpu
>
> | HEAD(1)| HEAD(1)| HEAD(2)| HEAD(2)|
> | | +patch | | +patch |
> ---------------------------+--------+--------+--------+--------+
> Reset to prompt | 438ms | 330ms | 228ms | 120ms |
> | | | | |
> TFTP a 3MB img | 4782ms | 3428ms | 3245ms | 2820ms |
> | | | | |
> FATLOAD USB a 3MB img* | 8515ms | 8510ms | ------ | ------ |
> | | | | |
> BOOTM LZO img in RAM | 3473ms | 3168ms | 592ms | 592ms |
> where CRC is | 615ms | 615ms | 54ms | 54ms |
> uncompress | 2460ms | 2462ms | 450ms | 451ms |
> final boot_elf | 376ms | 68ms | 65ms | 65ms |
> | | | | |
> BOOTM LZO img in FLASH | 3207ms | 2902ms | 1050ms | 1050ms |
> where CRC is | 600ms | 600ms | 135ms | 135ms |
> uncompress | 2209ms | 2211ms | 828ms | 828ms |
> | | | | |
> Copy 1.4MB from NOR to RAM | 134ms | 72ms | 120ms | 70ms |
>
> (1) No dcache
> (2) dcache enabled in board_init
> *Does not work when dcache is on
>
> Size impact:
>
> C version:
> text data bss dec hex filename
> 202862 18912 266456 488230 77326 u-boot
>
> ASM version:
> text data bss dec hex filename
> 203798 18912 266288 488998 77626 u-boot
> 222712 u-boot.bin
>
> Changes since V1:
> - Made the usage of these functions optional be CONFIG_USE_ARCH_MEM
> - Usage of PLD instruction on all architectures supporting it
> - Added a README entry
> - Minor style fixes
>
> Signed-off-by: Matthias Weisser<weisserm at arcor.de>
> ---
Sorry for leaving this patch alone for so long.
Can you please just repost a (rebased) V3 with the history below the cut
line so that it does not appear in the commit message? As it is not a
fix but was tested on two different ARM archs, I think I'll add it to
master rather than next so that it goes into mainline without delay.
Amicalement,
--
Albert.
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