cvs commit: src/sys/amd64/amd64 machdep.c src/sys/amd64/include pcpu.h

[Peter Wemm]

peter       2003/11/20 14:54:45 PST

  FreeBSD src repository

  Modified files:
    sys/amd64/amd64      machdep.c 
    sys/amd64/include    pcpu.h 
  Log:
  Provide a streamlined '#define curthread __curthread()' for amd64 to avoid
  the compiler having to parse and optimize the PCPU_GET(curthread) so often.
  __curthread() is an inline optimized version of PCPU_GET(curthread) that
  knows that pc_curthread is at offset zero in the pcpu struct.  Add a
  CTASSERT() to catch any possible changes to this.  This accounts for
  just over a 1% wall clock speedup for total kernel compile/link time,
  and 20% compile time speedup on some specific files depending on which
  compile options are used.
  
  Approved by:  re (jhb)
  
  Revision  Changes    Path
  1.600     +3 -0      src/sys/amd64/amd64/machdep.c
  1.41      +10 -0     src/sys/amd64/include/pcpu.h