Please see [1] and [2] for more information on these ODE crashes.
Essentially, we've narrowed it down to a problem using the default ODE collider with more than 1 region. Stress tests
with 20 bots constantly teleporting around one region (or between two simulators in a grid each running 1 region) do not
trigger the ODE crash even after many hours.
The same stress test with 20 bots teleporting between two regions on the same system, even where the regions are 10 map
spaces apart, always triggers the collider crash sooner or later. Sometimes this occurs almost immediately, sometimes
only after an hour or so.
Compiling ODE with the older collider (GIMPACT instead of OPCODE) doesn't see
this crash.
My chief suspicion is that there's actually an ODE/collider memory freeing bug. I suspect that it's not very usual to
run more than one physics 'world' in a program (in OpenSimulator, each region runs its own world). It could also be a
problem with OpenSim's P/Invoke interface to ODE causing collision objects to be freed at the wrong time, but I'm
currently discounting that because we don't see the same failure with two simulators each with a single region, and ODE
scenes at the OpenSim level are entirely separate, even though they aren't in the ODE library itself.
[1] contains a link in the comments to an ODE Linux 64 bit library I compiled using the GIMPACT collider, if you're
running that platform and want to try it. This will work on any recent version of OpenSim (probably even 0.6.9).
Using a linux distro version of ode probably won't fix this problem as I expect they will have compiled it using OPCODE.
OpenSimulator only every uses the ODE library bundled in its bin directory, unless you start symlinking or similar.
[1] http://opensimulator.org/mantis/view.php?id=3251
[2] http://opensimulator.org/mantis/view.php?id=4553
On 01/01/12 20:23, Klaus-E. Klingner wrote:
Hallo,
Thanks for the tip. But I am not using any mesh in my sim :(
Basically I am using the DIVA because of the wifi, but think I will switch once
the new GUI is done, that was written
about here on the list. Do not have time to write one myself atm.
Regards,
Klaus
On 01.01.2012 14:38, M.E. Verhagen wrote:
Happy new year !
One other thing what seems to trigger ode crashes seem to faulty meshes, you
can reconize these from opensim log lines
like:
10:49:19 - [MESH]: no recognized physics mesh found in mesh asset
11:06:40 - [MESH]: asset data is zero length
06:40 - [MESH]: experimental mesh proxy generation for
defaultMesh/9af57c73-8ef4-42f1-9415-46e8491213cd
Try to find these inworld and delete them. On my box the ode crashes were less
fequent after deleting those.
The case with the libode is that it does not seem to be compatible with some
systems luckely most system already have
a libode in their repo why not use that libode ?
I am using a git version, not the diva. Could be that some recent updates on
the odescene also prevent some crashes.
Op zaterdag 31 december 2011 schreef Klaus-E. Klingner ([email protected]
<mailto:[email protected]>) het
volgende:
> <sigh> I have to correct myself. The world just crashed again with exactly
the same error :(
>
> Regards,
>
> Klaus
>
> On 31.12.2011 18:19, Klaus-E. Klingner wrote:
>
> Hallo,
>
> thank you for the tip. However it did not fix the problem :/ I still got the
same crash. However I noticed that the
ode-file in the physics folder of DIVA is different from the one in the
original OpenSim 0.72-download. I copied that
over, started the world and that seems to have done the trick. Now I just have
to figure out a way to one of the sims
that suddenly disappeared :/
>
> Regards and a happy and a happy new year,
>
> Klaus
>
>
> Additional remark:
>
> To install the libode on SuSe you have to add the OpenSuSE-Gamerepository with
>
> zypper addrepo http://download.opensuse.org/repositories/games/openSUSE_11.4/
opensuse-games-x86_64
>
> and then install libode using
>
> zypper install libode1
>
> On 31.12.2011 16:57, M.E. Verhagen wrote:
>
>
>
> I had the same sort of ode crashes, i installed ode on my system with 'yum
install ode' and deleted the libode.so
from the opensim bin dir, after wich i simlinked the lib to make sure opensim
uses it. I also downloaded
https://github.com/downloads/justincc/opensim/libode.so-x86_64.so, and the
crashes stopped.
>
>
>
> On suse this would something like these commands:
>
> yum install libode
>
> cd /opt/opensim/diva-r16915/bin
>
> wget https://github.com/downloads/justincc/opensim/libode.so-x86_64.so
>
> rm libode.so
>
> rm libode-x86_64.so
>
> mv libode.so-x86_64.so <http://libode.so-x86_64.so> libode-x86_64.so
>
> ln /usr/lib64/libode.so.1.1.1 libode.so
>
>
> I am not sure if there is a libode.so.1.1.1, it could named differently, but
just symlink it.
> In theory the symlink is not needed, but it cannot hurt.
>
>
> _______________________________________________
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> [email protected] <mailto:[email protected]>
> https://lists.berlios.de/mailman/listinfo/opensim-users
>
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Justin Clark-Casey (justincc)
http://justincc.org/blog
http://twitter.com/justincc
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