32bit kernel

Peter Bergner bergner at brule.borg.umn.edu
Sat Sep 7 00:03:15 EST 2002

Armin Schindler wrote:
: Are there known differences between ppc and ppc64 regarding performance ?

Not for your driver testing/porting.  You'll see a difference if your box
has more than 3G of memory as the ppc32 kernel can only access that much
on POWER3 systems (IO lives from 3G-4G).  The ppc64 kernel also gives
each ppc32 app a full 4G of virtual address space to live in/use.
I _think_ the ppc32 kernel restricts that to 2G.


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