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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.
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| .. | ||
| pc | ||
| _inttypes.h | ||
| _limits.h | ||
| apicreg.h | ||
| asm.h | ||
| asmacros.h | ||
| atomic.h | ||
| bus_amd64.h | ||
| bus_at386.h | ||
| bus_dma.h | ||
| bus_memio.h | ||
| bus_pio.h | ||
| bus.h | ||
| clock.h | ||
| cpu.h | ||
| cpufunc.h | ||
| cputypes.h | ||
| critical.h | ||
| db_machdep.h | ||
| elf.h | ||
| endian.h | ||
| exec.h | ||
| float.h | ||
| floatingpoint.h | ||
| fpu.h | ||
| frame.h | ||
| ieeefp.h | ||
| in_cksum.h | ||
| kse.h | ||
| legacyvar.h | ||
| limits.h | ||
| md_var.h | ||
| mptable.h | ||
| mutex.h | ||
| npx.h | ||
| param.h | ||
| pcb_ext.h | ||
| pcb.h | ||
| pci_cfgreg.h | ||
| pcpu.h | ||
| pmap.h | ||
| proc.h | ||
| profile.h | ||
| psl.h | ||
| ptrace.h | ||
| reg.h | ||
| reloc.h | ||
| resource.h | ||
| runq.h | ||
| segments.h | ||
| setjmp.h | ||
| sigframe.h | ||
| signal.h | ||
| smp.h | ||
| specialreg.h | ||
| stdarg.h | ||
| sysarch.h | ||
| trap.h | ||
| tss.h | ||
| ucontext.h | ||
| varargs.h | ||
| vmparam.h | ||