Real-Time Physics Simulation Forum 2022-01-13T12:37:33+00:00 https://pybullet.org/Bullet/phpBB3/app.php/feed/topic/13139 2022-01-13T12:37:33+00:00 2022-01-13T12:37:33+00:00 https://pybullet.org/Bullet/phpBB3/viewtopic.php?p=43807#p43807 <![CDATA[Re: Setting up bullet physics multithreading]]>

Code: 

#define BT_THREADSAFE = 1
?

Statistics: Posted by paokakis — Thu Jan 13, 2022 12:37 pm

]]> 2021-01-18T13:21:34+00:00 2021-01-18T13:21:34+00:00 https://pybullet.org/Bullet/phpBB3/viewtopic.php?p=43256#p43256 <![CDATA[Setting up bullet physics multithreading]]>
I have the following problem - im trying to set up multi-threaded calculations in BP, however, not all seems to be going as it should. Here's the init code:

Code: 

static CustomTaskScheduler TaskScheduler(TEXT("bullet physics task scheduler"), PhysicsThreadCount);TaskScheduler.setNumThreads(PhysicsThreadCount);btSetTaskScheduler(&TaskScheduler);CollisionConfiguration = new btDefaultCollisionConfiguration();Dispatcher = new btCollisionDispatcherMt(CollisionConfiguration);OverlappingPairCache = new btDbvtBroadphase();SolverPool = new btConstraintSolverPoolMt(PhysicsThreadCount);DynamicsWorld = new btDiscreteDynamicsWorldMt(Dispatcher, OverlappingPairCache, SolverPool, nullptr, CollisionConfiguration);
CustomTaskScheduler is a custom scheduler i wrote.

When I launch the simulation, however, all the task threads in the scheduler i wrote. Breakpoints in parallelFor() and parallelSum() are not being hit at all. In the thread list i see the threads from the CustomTaskScheduler, but no other additional Bullet-related threads. So all in all, it seems like despite everything, Bullet still operated on a single thread. Is there something im missing in my initialization?

EDIT: Previously i forgot to use Mt version of dispatcher. After the fix, however, it still doesnt seem to use other threads.

Statistics: Posted by YessMasster — Mon Jan 18, 2021 1:21 pm

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