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Particle load-balancing on startup #4805
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Hi @n01r, I think that this in an excellent idea and I also think that implementing what you suggest should not be too difficult. It would be beneficial for several of our simulation cases. I was discussing offline this issue with @tmsclark2 and one of our considerations is that a possible further improvement would be to implement a mechanism to inform during the simulation the rank 0 process that at least one rank is running out of memory, which would result into an immediate call to the load balancer. This could be achieved with a reduce MPI call. However, since this is more complex to implement, I think that what you propose is already a very good starting point. |
Discussed on Mar 27th, 2024: @WeiqunZhang will work on this as part of KISMET 🙏 |
That sounds great, thank you! 🙏 |
Certain setups, like laser solid density interactions, require very high numbers of particles and have very strongly localized density distributions.
It would be good have an option to load-balance the particles already before or during creation to avoid out-of-memory errors during initialization.
From meeting logs:
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