[julia-users] asynchronous reading from file

[pevnak]

Hi All,
I would like to implement an asynchronous reading from file.

I am doing stochastic gradient descend and while I am doing the 
optimisation, I would like to load the data on the background. Since 
reading of the data is followed by a quite complicated parsing, it is not 
just simple IO operation that can be done without CPU cycles.

the skeleton of my current implementation looks like this

rr = RemoteChannel()
@async put!(rr, remotecall_fetch(loaddata,2)

  for ii in 1:maxiter
    #do some steps of the gradient descend

   #check if the data are ready and schedule next reading
    if isready(rr)
      append!(dss[1],take!(rr));
        @async put!(rr, remotecall_fetch(loaddata,2)
     end
   end


nevertheless the isready(rr) always returns false, which looks like that 
the data are never loaded.

I start the julia as julia -p 2, therefore I expect there will be a 
processor.

Can anyone explain me please, what am I doing wrong?
Thank you very much.

Tomas