Re: use splay trees instead of lists for vm mappings

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02-22-2008, 12:03 PM

Tobias Weingartner

Posts: n/a

Re: use splay trees instead of lists for vm mappings

On Thursday, January 19, Mike Belopuhov wrote:
> On Thu, Jan 19, 2006 at 10:25 -0800, Ted Unangst wrote:
> > do you have numbers for performance diff? like before and after for 3
>
> some test results are available at
> http://crypt.org.ru/~mkb/pmap/

These look interesting. Can you describe better what each axis is,
and what the tests you are running are?

> test machine was athlon 850mhz / 512ram, running 3.8-current
> just _before_ weingart's change.
> (i probably should place dmesg there too)...
>
> > make builds? i also suspect that a rb tree may be better too.
> >
>
> i will make new test (requested by markus) on Saturday.
> i could try to make r/b tree test too.
>
> the worst thing is that it's not that good at small number
> of processes, but on amount of about 3500 and more it's the
> only way...

Please give the r/b tree a run too.

--Toby.

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Re: use splay trees instead of lists for vm mappings