:> :julian
:>
:> I'd like to see this too. I will soon have two SMP boxes of my own to
play
:> with for my own personal use and for an upcoming project, and at least one
:> will be available for SMP life-testing purposes for several months.
:> I really want to see two things: (1) Actual sharing of the physical pmap
:> between rfork(RFMEM|RFPROC)'d processes, and (2) Avoiding the %cr3 reload
:> ( which clears the TLB ) when switching between such processes.
:
:This would also suggest shceduler changes that would increasr the
:likelyhood of 'related' processes being scheduled together.
:
:One scheme I remember id the A-list/B-list scheme, where
:each scheduling priority has two list that are alternated.
:whichever list is being drained is not eligible for receiving new items.
:They must go to the other list. When the active list is drained and theya
:are switched, the new list is first sorted accoring to affinity
:related effects.
:
:julian
This can get real tricky. I think the scheduler will almost do this
anyway, just due to the way threads tend to go to sleep and get woken
up, so adding a lot of sophistication here may not help.
-Matt
Matthew Dillon
<dil...@backplane.com>
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