FreeBSD is very slow when Memory chip sizes are imbalanced in slots

[Mehmet Erol Sanliturk]

On Mon, Mar 18, 2013 at 9:48 AM, Scot Hetzel <swhetzel at gmail.com> wrote:

> On Mon, Mar 18, 2013 at 11:06 AM, Mehmet Erol Sanliturk
> <m.e.sanliturk at gmail.com> wrote:
> > Computer A : Memory Chip Sizes : ( 2 GB , 1 GB , 2 GB , 1 GB ) : Working
> > SLOW . FreeBSD A
> > Computer B  : Memory Chip Sizes : ( 2 GB , 2 GB , 2 GB , 2 GB ) : Working
> > FAST . FreeBSD B
> >
> > Interchange memory chips :
> >
> > Computer A : Memory Chip Sizes : ( 2 GB , 2 GB , 2 GB , 2 GB ) : Working
> > FAST . FreeBSD A
> > Computer B  : Memory Chip Sizes : ( 2 GB , 1 GB , 2 GB , 1 GB ) : Working
> > SLOW . FreeBSD B
> >
> >
>
> What happens if you configure the memory as ( 2 GB , 2 GB , 1 GB , 1 GB )?
>
> --
> DISCLAIMER:
>
> No electrons were maimed while sending this message. Only slightly bruised.
>


This can NOT be done  , because

Channel A : Slot 1 :
                   Slot 2 :

Channel B : Slot 1 :
                   Slot 2 :

( Slot 1 , Slot 1 ) should be equivalent when chips inserted to both .
( Slot 2 , Slot 2 ) should be equivalent when chips inserted to both .

Thank you ver much .

Mehmet Erol Sanliturk