[Opensim-dev] General status of OpenSim on 64 bit Linux Architecture

Sun Jun 21 18:43:06 UTC 2009

Wow, as I could have foretell this thing is really debated, sorry for
having launched this fire :)

Anyway at least I know that I can ask for help to Sacha Magne if our
friends go 64 bits or to Nebadon if we are going 32-bit emulation :)

This is REALLY a huge comfortant news. And I thanks people involved in
this mailing list for answering such good hints
(I eventually understood that, YES there are Lions and Dragons hiding
here, but some people did survive)  :)

Fran Lebowitz  - "Life is something to do when you can't get to
sleep." - http://www.brainyquote.com/quotes/authors/f/fran_lebowitz.html

2009/6/19 Sacha Magne <sacha.magne at k-grid.com>:
> I disagree completly. Osim run fine in 64Bits. All our sims are in 64B and
> we don't experience any majour issues.
>
> Sacha
>
> Le 18 juin 09 à 19:39, Nebadon Izumi a écrit :
>
> regardless of PAE in 32 bit mode the most memory OpenSim.exe could consumeis
> 3.3gb of ram, Also my experience with 64 bit is less than good, in windows
> there is no 64 bit with OpenSim, you can not make ODE run in 64 bit mode in
> windows, and in Linux i experiece major issues with openjpeg in 64 bit mode,
> I personally do not suggest anyone run OpenSim in 64 bit mode unless you
> like issues.  and to be honest I have not seen a single case to date where
> any OpenSimulator could run much past 2gb of ram anyway without totally
> blowing up, My conclusion to 64 bit opensimulator is that you would be
> completly wasting your time, the only way a 64 bit system is good is if you
> have more than 4gb ram and plan on running multiple single instance
> simulators in 32bit emulated mode where the total combined requirements of
> the multiple simulators combined equals more than 3.5gb ram.  Otherwise
> running opensimulator in 64bit mode gains you absolutely nothing but
> problems trying to run in Native 64 bit mode.
>
> Neb
>
> On Thu, Jun 18, 2009 at 10:21 AM, Mike Dickson <mike.dickson at hp.com> wrote:
>>
>> It doesn't take alot of "tricks" to use beyond 3.5GB of memory with a 32
>> bit OS.  The PAE kernel will handle it. I have one system with 24GB
>> that's 32bit (for othe reasons).  I've also run OpenSIm 64bit fine
>> recently so I think either approach is feasible.  If I was starting from
>> scratch with a system with lots of memory I'd probably do 64bit...
>>
>> Mike
>>
>>
>> On Thu, 2009-06-18 at 16:45 +0000, Salahzar Stenvaag wrote:
>> > I was curious to understand the current status of OpenSim on Linux
>> > architectures (such as Linux Red Hat Enterprise 5 or similar) using 64
>> > bit to access all the available memory.
>> > Browsing the documentation it seems that OpenSim can run under 64 bit,
>> > but I've seen MANY mantis referring to problems with 64 bit
>> > compilation and running.
>> > Also in the past I've seen some people dropping their 64 bit regions
>> > (and installing instead 32 bit version) because they didn't work as
>> > expected (instability, strange collision effects etc).
>> > I've also seen a 32bit-OpenSim-launcher.exe (or something similar) who
>> > allegedly can run opensim in 32 bit mode even on 64 bit systems, but
>> > do not know if this applies only to 64-bit windows or also to linux
>> > systems. There is some information on the wiki, but it appears quite
>> > outdated right now.
>> >
>> > So the question is: if people want to install opensim on a 64 bit
>> > system with say 8 Gbram, what do you suggest?
>> > 1\ don't even think that throw away 64 bit system and use a 32 bit
>> > system using just the 3.5 G ram it can access?
>> > 2\ use some tricks to launch opensim.exe as if it were a 32 bit?
>> > 3\ install 32 bit OS and use some tricks to make it see the memory
>> > beyond 3.5 G?
>> > 4\ go on and use 64 bit system it works like a charme and all the
>> > MANTIS and the old problems had vanished in the void? :)
>> >
>> > Thanks for any suggestion on that and if you already run OpenSim on
>> > RedHat 64 bit if you have any suggestions...
>> > sal
>> >
>> >
>> >
>> > Rodney Dangerfield  - "What a dog I got, his favorite bone is in my
>> > arm." -
>> > http://www.brainyquote.com/quotes/authors/r/rodney_dangerfield.html
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>>
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>
>
> --
> Michael Emory Cerquoni - Nebadon Izumi @ http://osgrid.org
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>
> Sacha Magne
> sacha.magne at k-grid.com
> K-Grid, the Kool grid for the Kool Kats
> http://K-grid.com
>
>
>
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