Groups 40 of 99+ julia-users › Error running examples of parallel computing with Julia 2 posts by 2 authors Charles Santana Jan 12 Hi, I am trying to figure out how to work with parallel computing with Julia. The documentation looks great, even for someone that has never worked with Parallel Computing (and that does not understand most of the concepts behind the documentation ;)). Just to mention: I am working in a PC with Ubuntu. It has a 4-core processor. To run the code I describe below I am calling the julia terminal as: $ julia -p 4 I am following the documentation here: http://docs.julialang.org/en/latest/manual/parallel-computing/ For one example, specifically, I am facing some problems. In this section: http://docs.julialang.org/en/latest/manual/parallel-computing/#id2 I am trying to run the following piece of code: @everywhere advection_shared_chunk!(q, u) = advection_chunk!(q, u, myrange(q)..., 1:size(q,3)-1) function advection_shared!(q, u) @sync begin for p in procs(q) @async remotecall_wait(advection_shared_chunk!, p, q, u) end end q end q = SharedArray(Float64, (500,500,500)) u = SharedArray(Float64, (500,500,500)) #Run once to JIT-compile advection_shared!(q,u) But I am facing the following error: ERROR: MethodError: `remotecall_wait` has no method matching remotecall_wait(::Function, ::Int64, ::SharedArray{Float64,3}, ::SharedArray{Float64,3}) Closest candidates are: remotecall_wait(::LocalProcess, ::Any, ::Any...) remotecall_wait(::Base.Worker, ::Any, ::Any...) remotecall_wait(::Integer, ::Any, ::Any...) in anonymous at task.jl:447 ...and 3 other exceptions. in sync_end at ./task.jl:413 [inlined code] from task.jl:422 in advection_shared! at none:2 What am I doing wrong here? As far as I know I am just reproducing the example in the docs... or not? Thanks for any help, Charles -- Um axé! :) -- Charles Novaes de Santana, PhD https://github.com/cndesantana Daniel Arndt Jan 18 This was cross-posted on Stack Overflow and answered there: http://stackoverflow.com/questions/34755454/how-to-run-a-function-in-parallel-with-julia-language/34772735 Charles, I believe the community preference is that you choose one medium or the other, and do not cross post questions like this. Cheers, Dan - show quoted text -