• Matthias Weisser's avatar
    arm: Use optimized memcpy and memset from linux · d8834a13
    Matthias Weisser authored
    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
    Signed-off-by: default avatarMatthias Weisser <weisserm@arcor.de>
    d8834a13
string.h 1.16 KB