cvs commit: src/sys/alpha/alpha mp_machdep.c src/sys/amd64/amd64 mp_machdep.c src/sys/i386/i386 mp_machdep.c src/sys/ia64/ia64 mp_machdep.c src/sys/kern init_main.c kern_exit.c kern_proc.c kern_resource.c kern_synch.c kern_tc.c subr_trap.c ...

[Poul-Henning Kamp]

phk         2006-02-07 21:22:02 UTC

  FreeBSD src repository

  Modified files:
    sys/alpha/alpha      mp_machdep.c 
    sys/amd64/amd64      mp_machdep.c 
    sys/i386/i386        mp_machdep.c 
    sys/ia64/ia64        mp_machdep.c 
    sys/kern             init_main.c kern_exit.c kern_proc.c 
                         kern_resource.c kern_synch.c kern_tc.c 
                         subr_trap.c 
    sys/sparc64/sparc64  mp_machdep.c tick.c 
    sys/sys              pcpu.h proc.h systm.h 
  Log:
  Modify the way we account for CPU time spent (step 1)
  
  Keep track of time spent by the cpu in various contexts in units of
  "cputicks" and scale to real-world microsec^H^H^H^H^H^H^H^Hclock_t
  only when somebody wants to inspect the numbers.
  
  For now "cputicks" are still derived from the current timecounter
  and therefore things should by definition remain sensible also on
  SMP machines.  (The main reason for this first milestone commit is
  to verify that hypothesis.)
  
  On slower machines, the avoided multiplications to normalize timestams
  at every context switch, comes out as a 5-7% better score on the
  unixbench/context1 microbenchmark.  On more modern hardware no change
  in performance is seen.
  
  Revision  Changes    Path
  1.58      +1 -1      src/sys/alpha/alpha/mp_machdep.c
  1.268     +1 -1      src/sys/amd64/amd64/mp_machdep.c
  1.262     +1 -1      src/sys/i386/i386/mp_machdep.c
  1.59      +1 -1      src/sys/ia64/ia64/mp_machdep.c
  1.262     +2 -3      src/sys/kern/init_main.c
  1.282     +3 -4      src/sys/kern/kern_exit.c
  1.239     +1 -3      src/sys/kern/kern_proc.c
  1.153     +12 -9     src/sys/kern/kern_resource.c
  1.274     +4 -5      src/sys/kern/kern_synch.c
  1.167     +21 -0     src/sys/kern/kern_tc.c
  1.284     +1 -1      src/sys/kern/subr_trap.c
  1.31      +1 -1      src/sys/sparc64/sparc64/mp_machdep.c
  1.19      +17 -0     src/sys/sparc64/sparc64/tick.c
  1.17      +1 -1      src/sys/sys/pcpu.h
  1.450     +1 -1      src/sys/sys/proc.h
  1.239     +3 -0      src/sys/sys/systm.h