When I run a DOP simulation, the majority of the time, only one core is being used except for a second or two every 30 seconds or so. I don't know the technical workings of how fluids and rigid bodies are simulated, but is it possible to make it use both cores all the time?

A picture is attached for details. The green is CPU usage, and it isn't divided per core, but you can tell that 50% of my whole processor is being used the majority of the time.