[mythtv-users] i386 vs x86_64 Fedora
Miroslav Suchý
miroslav at suchy.cz
Tue May 20 19:51:52 UTC 2008
Blammo napsal(a):
>> Memory:
>> i386 - can use up to 3.5GB (more with some tricks which limit speed)
>> x86_64 - can use "unlimited" memory
>> *** Probably not affect on MythTV deployment
>
> Well written overall, one small correction:
>
> At various jobs, I've had many Opteron based servers running
> RHEL4/5-i386 with more than 4 gigs of RAM, and have had all of it
> usable by the operatiing system. The windows operating system is the
> only one _REALLY_ borked when it comes to handling more than 4gigs of
> ram.
As I said - you can, the trick is PAE [1]. Which means you need to do
three cpu instruction instead of two, when you access memory. Which
means 50% descrease of CPU speed with memory access.
Mirek Suchy
[1] http://en.wikipedia.org/wiki/Physical_Address_Extension
--
,,,
(o o)
=================================oOO==(_)==OOo===========
) mailto:miroslav at suchy.cz
( ICQ: #70802630 tel:+420-603-775737 skype:MiroslavSuchy
)echo
'[q]sa[ln0=aln256%Pln256/snlbx]sb3135071790101768542287578439snlbxq'|dc
(________________________________________Oooo._____________
.oooO ( )
( ) ) /
\ ( (_/
\_)
More information about the mythtv-users
mailing list