Commit Graph

11 Commits

Author SHA1 Message Date
peter
3b842d34e8 $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
jlemon
b5d4171ff6 Unifdef VM86.
Reviewed by:	silence on on -current
1999-06-01 18:20:36 +00:00
luoqi
a60ffa3c1c Unbreak VESA on SMP. 1999-05-12 21:39:07 +00:00
luoqi
af7e9be5cc Enable vmspace sharing on SMP. Major changes are,
- %fs register is added to trapframe and saved/restored upon kernel entry/exit.
- Per-cpu pages are no longer mapped at the same virtual address.
- Each cpu now has a separate gdt selector table. A new segment selector
  is added to point to per-cpu pages, per-cpu global variables are now
  accessed through this new selector (%fs). The selectors in gdt table are
  rearranged for cache line optimization.
- fask_vfork is now on as default for both UP and SMP.
- Some aio code cleanup.

Reviewed by:	Alan Cox	<alc@cs.rice.edu>
		John Dyson	<dyson@iquest.net>
		Julian Elischer	<julian@whistel.com>
		Bruce Evans	<bde@zeta.org.au>
		David Greenman	<dg@root.com>
1999-04-28 01:04:33 +00:00
bde
80534e76e1 Added a per-cpu variable `switchticks' for use in scheduling. 1999-02-22 15:13:34 +00:00
msmith
95c3baa7ee Presently there is only one `currentldt' variable for all cpus
in a SMP system. Unexpected things could happen if each cpu
        has a different ldt setting and one cpu tries to use value
        of currentldt set by another cpu.

        The fix is to move currentldt to the per-cpu area. It includes
        patches I filed in PR i386/6219 which are also user ldt related.

PR:		i386/7591, i386/6219
Submitted by:	Luoqi Chen <luoqi@watermarkgroup.com>
1998-08-18 07:47:12 +00:00
phk
d3d65c6b2e Some cleanups related to timecounters and weird ifdefs in <sys/time.h>.
Clean up (or if antipodic: down) some of the msgbuf stuff.

Use an inline function rather than a macro for timecounter delta.

Maintain process "on-cpu" time as 64 bits of microseconds to avoid
needless second rollover overhead.

Avoid calling microuptime the second time in mi_switch() if we do
not pass through _idle in cpu_switch()

This should reduce our context-switch overhead a bit, in particular
on pre-P5 and SMP systems.

WARNING:  Programs which muck about with struct proc in userland
will have to be fixed.

Reviewed, but found imperfect by:       bde
1998-05-28 09:30:28 +00:00
tegge
cf73abacf6 Change simple lock handling to not depend upon having a local apic
available.  The per-cpu variable ss_tpr has been replaced by ss_eflags.
This reduced the number of interrupts sent to the wrong CPU, due to
the cpu having the global lock being inside a critical region.

Remove some unneeded manipulation of tpr register in mplock.s.

Adjust code in mplock.s to be aware of variables on the stack being
destroyed by MPgetlock if GRAB_LOPRIO is defined.
1998-05-17 23:08:04 +00:00
tegge
0b804fd802 For SMP, use prv_PPAGE1/prv_PMAP1 instead of PADDR1/PMAP1.
get_ptbase and pmap_pte_quick no longer generates IPIs.
This should reduce the number of IPIs during heavy paging.
1998-05-17 18:53:19 +00:00
peter
b5d3779b73 Fix VM86 compiles. a #include "opt_vm86.h" was missing, and the my_tr
variable was needed in the non-SMP case.

Submitted by:  Jonathan Lemon <jlemon@americantv.com>
1998-04-06 18:59:15 +00:00
peter
531b8c0e84 A pair of C structures used for laying out the SMP per-cpu data space. 1998-04-06 15:37:21 +00:00