[ug-bosug] Nevada and x86 64bit CPU's : a few questions

[Manish Chakravarty]

Moinak,

Interesting and informative!

Thank you for spending time to explain me all this!


On Feb 12, 2008 10:17 PM, Moinak Ghosh <Moinak.Ghosh at sun.com> wrote:

> As an adjunct to my previous reply here are some resources that might
> interest you:
>
> Solaris 64-bit Developer Guide
> http://docs.sun.com/app/docs/doc/816-5138
>
> Solaris 64-bit FAQ
> http://www.sun.com/software/solaris/faqs/64bit.xml
>
> BTW Solaris 7 released in 1998 was a full 64Bit operating system.
>
> Regards,
> Moinak.
>
> Manish Chakravarty wrote:
> >
> >
> > On Feb 12, 2008 9:14 PM, Angad Singh <angad.singh at sun.com
> > <mailto:angad.singh at sun.com>> wrote:
> >
> >     Could you please point me to links / refs to the system you found
> >     out? Opteron and 8GB for 25k is a great deal!
> >
> > It's just the box, without the monitor keyboard ( I dont need it, will
> > ssh into the box and work)
> >
> > The deal is from the same guy who supplies computers for my company,
> > thus was able to get a sweet deal :)
> > I'll pass the dealer's contact info to you tomorrow
> >
> >
> >     On Feb 12, 2008 9:04 PM, Manish Chakravarty <manishchaks at gmail.com
> >     <mailto:manishchaks at gmail.com>> wrote:
> >
> >         Hi BOSUG,
> >
> >         I am looking for an Opteron based box with 8GB of RAM ( Saw
> >         one good configuration for around 25k )
> >
> >         Since Nevada userland is 32bit, would it be able to address
> >         all of the 8GB of RAM or like Windows XP , only the first 4GB
> >         will be used?
> >
> >         I know Ubuntu 64bit can access and utilize all of my 8 gigs if
> >         needed ( But Ubuntu , like all 64 bit Linux distros has full
> >         64bit userland).
> >         I am confused because Nevada userland is 32 bit but the kernel
> >         is 64bit ( on machines which have 64bit capable CPU's )
> >
> >         Two more questions:
> >         1) How does this work? ( 64bit kernel and 32 bit userland;
> >         could some explain in a little detail?)
> >
> >         2) Why does Nevada not ship with full 64bit userland?
> >         I understand #2 would break binary compatibility for 32bit apps.
> >
> >         For this reason Ubuntu has the "ia32-libs" series of libraries.
> >         For example VMWare Server for linux is a proprietary 32bit
> >         application.
> >         When VMWare Server is installed (via apt-get) on a 64bit
> >         Ubuntu box, "ia32-libs" , "ia32-libs-gtk" and other 32 bit
> >         libs are pulled in.
> >         Ubuntu has a ton of these packages ( viz "ia32-sun-java" for
> >         one :) )
> >
> >         Could Nevada not have the same thing? Ship with a 64bit
> >         userland (for performance) and 32 bit ( for backward binary
> >         compatibility )
> >
> >         Most (if not all ) Nevada users get software from source and
> >         compile it.
> >         In such a case, they would be compiling straight to 64 bit.
> >         Not much of a difference for them ( let them be using SFE or
> >         doing it by hand)
> >         And they would end up using a full 64 bit system
> >
> >         -- Manish
> >
> >         --
> >         Manish Chakravarty
> >         http://manish-chaks.livejournal.com/
> >
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> >
> >
> >
> > --
> > Manish Chakravarty
> > http://manish-chaks.livejournal.com/
> > ------------------------------------------------------------------------
> >
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>


-- 
Manish Chakravarty
http://manish-chaks.livejournal.com/
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