1. 08 10月, 2010 1 次提交
    • Z
      x86, setup: Use string copy operation to optimze copy in kernel compression · 68f4d5a0
      Zhao Yakui 提交于
      The kernel decompression code parses the ELF header and then copies
      the segment to the corresponding destination.  Currently it uses slow
      byte-copy code.  This patch makes it use the string copy operations
      instead.
      
      In the test the copy performance can be improved very significantly after using
      the string copy operation mechanism.
              1. The copy time can be reduced from 150ms to 20ms on one Atom machine
      	2. The copy time can be reduced about 80% on another machine
      		The time is reduced from 7ms to 1.5ms when using 32-bit kernel.
      		The time is reduced from 10ms to 2ms when using 64-bit kernel.
      Signed-off-by: NZhao Yakui <yakui.zhao@intel.com>
      LKML-Reference: <1286502453-7043-1-git-send-email-yakui.zhao@intel.com>
      Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
      68f4d5a0
  2. 07 10月, 2010 5 次提交
  3. 06 10月, 2010 5 次提交
  4. 05 10月, 2010 29 次提交