freebsd-dev/sys/i386/isa
Bruce Evans 6a70163fcc Removed some SMP ifdefs so that using the TSC as a cputime clock is
not completely decided at config time.  Just don't default to using
the TSC if there are multiple active CPUs.  Also, don't default to
using the TSC if it is broken.  SMP ifdefs are still used to disallow
using perfmon since perfmon is always broken if SMP is just configured.

This only helps much for SMP kernels running on 1 CPU.  The overheads
for using the i8254 cputime clock were a bit too high on 486/33's, and
now on multi-GHz CPUs they are usually in the 99-99.9% range.  Switching
from the old default of an i8254 clock to the TSC works poorly because
the overheads are not recalibrated.

Use the same condition for declaring perfmon stuff as for using it.
2006-10-29 09:48:44 +00:00
..
atpic_vector.s
atpic.c Change the x86 interrupt code to suspend/resume interrupt controllers 2006-10-10 23:23:12 +00:00
ccbque.h
clock.c Use calendaric calculation support from subr_clock.c instead of home-rolled. 2006-10-02 16:18:40 +00:00
elcr.c
elink.c
elink.h
icu.h
isa_dma.c
isa.c
isa.h
nmi.c
npx.c
pmtimer.c First part of a little cleanup in the calendar/timezone/RTC handling. 2006-10-02 12:59:59 +00:00
prof_machdep.c Removed some SMP ifdefs so that using the TSC as a cputime clock is 2006-10-29 09:48:44 +00:00
spic.c
spicreg.h
vesa.c