f1b665c8fe
- It actually works this time, honest!
- Fine grained TLB shootdowns for SMP on i386. IPI's are very expensive,
so try and optimize things where possible.
- Introduce ranged shootdowns that can be done as a single IPI.
- PG_G support for i386
- Specific-cpu targeted shootdowns. For example, there is no sense in
globally purging the TLB cache for where we are stealing a page from
the local unshared process on the local cpu. Use pm_active to track
this.
- Add some instrumentation for the tlb shootdown code.
- Rip out SMP code from <machine/cpufunc.h>
- Try and fix some very bogus PG_G and PG_PS interactions that were bad
enough to cause vm86 bios calls to break. vm86 depended on our existing
bugs and this was the cause of the VESA panics last time.
- Fix the silly one-line error that caused the 'panic: bad pte' last time.
- Fix a couple of other silly one-line errors that should have caused more
pain than they did.
Some more work is needed:
- pmap_{zero,copy}_page[_idle]. These can be done without IPI's if we
have a hook in cpu_switch.
- The IPI handlers need some cleanup. I have a bogus %ds load that can
be avoided.
- APTD handling is rather bogus and appears to be a large source of
global TLB IPI shootdowns for no really good reason.
I see speedups of between 1.5% and ~4% on buildworlds in a while 1 loop.
I expect to see a bigger difference when there is significant pageout
activity or the system otherwise has memory shortages.
I have backed out a few optimizations that I had been using over the last
few days in order to be a little more conservative. I'll revisit these
again over the next few days as the dust settles.
New option: DISABLE_PG_G - In case I missed something.
|
||
|---|---|---|
| .. | ||
| defines | ||
| files | ||
| files.alpha | ||
| files.amd64 | ||
| files.i386 | ||
| files.ia64 | ||
| files.pc98 | ||
| files.powerpc | ||
| files.sparc64 | ||
| kern.mk | ||
| kern.post.mk | ||
| kern.pre.mk | ||
| kmod_syms.awk | ||
| kmod.mk | ||
| ldscript.alpha | ||
| ldscript.amd64 | ||
| ldscript.i386 | ||
| ldscript.ia64 | ||
| ldscript.powerpc | ||
| ldscript.sparc64 | ||
| majors | ||
| Makefile.alpha | ||
| Makefile.amd64 | ||
| Makefile.i386 | ||
| Makefile.ia64 | ||
| Makefile.pc98 | ||
| Makefile.powerpc | ||
| Makefile.sparc64 | ||
| makeLINT.sed | ||
| newvers.sh | ||
| NOTES | ||
| options | ||
| options.alpha | ||
| options.amd64 | ||
| options.i386 | ||
| options.ia64 | ||
| options.pc98 | ||
| options.powerpc | ||
| options.sparc64 | ||
| systags.sh | ||