Hello everyone, Im trying to use multithreading in EventBasedModel. Im getting this error while doing this. Can someone comment ? What can be issue? What is this error trying to say? Threads.@threads for agent in allagents(model) model_rule!(agent, model) …

Not a big Agents user or Turing for that matter, but I recall from earlier discussions that you had some agents models with millions of allocations and seemingly lots of room for optimisation. Have you sorted these issues? Because if not you’re wasting time trying to get multithreading to work or (a…

Not too familiar with Agents but I don’t think the package is related to your error. That type of error shows up when the iterator doesn’t have a definition of firstindex so the threading doesn’t really know what to do with it. e.g. (a contrived example) julia> @threads for i in Ref(2) end E…

Even though your specific problem is due to what @DanielVandH is saying, I’d like to emphasize that unfortunately Agents.jl doesn’t support multithreading in most of the cases. In practice only when there is no interaction between agents. If well-optimized an EventBasedModel should be plenty fast ev…

I worked on that but it didnt improve alot. For speed of simulation I gain some time as compare to last time but this is still not enough I want this time to be more small. Though I feel like Im not sure what to change more and thats why I was looking for this multithreading :sweat_smile:. But I und…

quick question…how much allocations are sensible for a complex model in general? Like Millions seems like not but how much you will say is good enough? under a million or it really depends how much one can optimise. I mean if one wants, code can be written in a way that its allocations are in kB e…

That’s really not a question that can sensibly be answered without knowing the algorithm you are implementing. 1.4 million allocations certainly lead to a strong suspicion that there’s a lot of room for improvement but maybe this is the rare case of a model that needs them? (I would put the chance o…

I ran profile for my code and it turns out that there a specific places where large allocations are dedicated. In one of place i have situation like example below. Example: function func(agent, model) model.x += 1 if model.x == nagents(model) ---do stuff --- end end now here t…

Again I think you need to spend some thing to get MWEs together and start dedicated threads for those. Here in the first example you just increment an integer counter which won’t allocate, so presumably the allocations are in the “do stuff” part which is missing. In the second example you might hav…

Yeah Im working on MWE. :sweat_smile: In first example I missed this. I also update model.x inside if condition. function func(agent, model) model.x += 1 if model.x == nagents(model) ---do stuff --- model.x = 0 ## Reset x end end For second one you meant …

I agree with @nilshg that it’s impossible to really know what the issue is that you’re having, but note that @time for i in 1:160000 aa[i] .= [1, 1, 1, 1] end could be @time for i in 1:160000 aa[i] .= (1, 1, 1, 1) end which will get rid of them. julia> function …

Multithreading in Agents.jl

Specific Domains Modelling & Simulations

Sahil_Khan August 23, 2024, 8:21am 12

Here is MWE. I tried to get sections which are causing issues in the example.

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Multithreading in Agents.jl

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