Justin, are the new ini lines working with OSgrid OpenSimulator
0.7.2.dev.8caf3ed - [zip] [27.4mb] 09-24-2011
<http://osgrid.googlecode.com/files/osgrid.opensim-09242011.v0.7.2.8caf3ed.zip>
?
On 2011-10-14 01:37, Justin Clark-Casey wrote:
Hi folks. I've had reason recently to investigate why flying across a
region can feel quite jerky.
It seems that one solution is to increase the number of
ImprovedTerseObjectUpdate packets that OpenSim sends out when the
avatar is moved. I'm assuming that more packets means smaller and
more frequent corrections of avatar position extrapolation by the viewer.
At the moment, we only send out 11 ish packets per second. Increasing
this to 22 makes avatar flying much smoother subjectively.
You can do this via a new set of config parameters added to the bottom
of the [Startup] config section of OpenSimDefaults.ini on commit 4e7d433.
In OpenSimDefaults.ini you can see the lines (minus comments)
MinFrameTime = 0.089
UpdateObjectsEveryNFrames = 1;
UpdateAgentsEveryNFrames = 1;
UpdateEntityMovementEveryNFrames = 1;
UpdateCoarseLocationsEveryNFrames = 50;
UpdatePhysicsEveryNFrames = 1;
UpdateTempCleaningEveryNFrames = 1000;
UpdateEventsEveryNFrames = 1;
UpdateTerrainEveryNFrames = 50;
UpdateStorageEveryNFrames = 200;
At the moment we need to halve MinFrameTime and double all the Update*
params except UpdateAgentsEveryNFrames. You can do this by overriding
the defaults with the following parameters at the bottom of the
[Startup] section of OpenSim.ini.
MinFrameTime = 0.0445
UpdateObjectsEveryNFrames = 2;
UpdateAgentsEveryNFrames = 1;
UpdateEntityMovementEveryNFrames = 2;
UpdateCoarseLocationsEveryNFrames = 100;
UpdatePhysicsEveryNFrames = 2;
UpdateTempCleaningEveryNFrames = 2000;
UpdateEventsEveryNFrames = 2;
UpdateTerrainEveryNFrames = 100;
UpdateStorageEveryNFrames = 400;
My subjective experience is that horizontal avatar flying feels much
smoother on my local standalone and on a remote system. However, this
is only the case once everything has finished loading and if you
aren't being spammed by spurious ObjectUpdates from prims, as
discussed very recently in this list. You can prevent spamming by
making sure your client bandwidth is suitable for your connection
quality or by setting enable_adaptive_throttles = true in
[ClientStack.LindenUDP].
I've no idea how this will perform on a more heavily loaded sim,
particularly as we're currently achieving this change by halving the
time that physics has to update and avatar location is updating twice
for every physics update. But if you try this I'd be interested in
any feedback.
Also, please feel free to tweak the settings in other ways but we
cannot provide any support.
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