[julia-users] Help! Problem with repeated calling of a function that creates SharedArray.

[Richard Tsai]

Can someone tell me what's wrong with the following code. 


   - When I run it, either the last for loop would just hang there or I 
   would get an error message such as
   
run=12
> 100
> LoadError: SystemError: shm_open() failed for 
> /jl024406KYMveTGtI7BVrX6waGws: Too many open files
> while loading In[4], in expression starting on line 20


   - If regular array is used, there would be no such problem.
   - I suspect that this is also the culprit that I encountered in a 
   previous post titled "(Large memory) computations and disk swapping

Here is the code:

function test(N=10000)

    #@sync K=SharedArray(Complex{Float64}, (N,N), init = S -> 
S[Base.localindexes(S)] = rand())
    
    K=SharedArray(Complex{Float64}, (N,N))
    
    #K=fill(Complex{Float64}, (N,N))
end

for i=1:4
    @time test(10);
end

N=[100 200 400 800] 

for run=1:20
    
    println("run=", run)
    for n in N
        println(n)
        test(n);  
    end 
end