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I am simulating a lot of particles. Why is Houdini not using all threads to the full extent. Is this normal, is this as much multi-threading as I can get out of houdini. I have 4 real threads and its not even using one of them fully (which would be 25%).

Just wondering.

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A lot of the POP nodes ain't multi-threaded so without using a different approach you won't be getting more usage.

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try to rebuild all pop nodes with vopPops they are multihreaded, there are still some nodes that You can't really avoid by that way, but it speeds up things

EDIT: in 12.5 many vexfunctions where improved and have better threading. for example the intersect, primattrib and xyzdistance are very fast now. it might be a bit more work at the beginning

Edited by sanostol
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try to rebuild all pop nodes with vopPops they are multihreaded,

thanks, I just started houdini and am not sure what you really mean but I will keep an eye out for it

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How do I purge the ram in houdini. I was doing some Rigid body sims and let it play over and over again always trying out new stuff but my ram is kinda getting full? How do i purge ram without restarting?

thanks

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On the DOP network node there's a "reset simulation" button, plus other controls for caching.

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