www.neuron.yale.edu

Posted: **Sun Dec 12, 2010 4:25 am**

In my parallel simulation I have a Vector() stvec containing the start times of nsyn
NetStim() and each worker creates its own set of nsyn synapses syn[nsyn]. I pass
the start times to the master with a pc.post() as follows:

Code: Select all

      func superrun(){local id
         id = hoc_ac_
         [ ...]
         stvec.resize(0)
         sl=new SectionList()
         for zz=0, nsyn-1 {
         stvec.append(s[zz].start)
         x=syn[zz].get_loc()
         sl.append()
         }
        [...]
        pc.post(stvec)
        return id
         }

and I get it with pc.upkvec with:

Code: Select all

     while ((id = pc.working) != 0) {
       stvec = pc.upkvec
        [...]
       }

How do I pass the sl SectionList(), which contains the syn locations?

Posted: **Sun Dec 12, 2010 11:00 am**

Wouldn't even try. What guarantee is there that the pointers in such a SectionList on one host will be valid on another host? In the context of bulletin-board style parallelization (which to me seems the only context in which the question makes sense), I would suggest that during model setup each host appends each section to a SectionList called allsecs. If each host executes the same model setup code, the sequence in which sections are created will be identical across all hosts, and the sequence of the sections in allsecs will also be identical. Then if you need to pass section subset information from one host to another, just pass a vector whose elements are the indices into the allsecs list that correspond to the sections of interest.

www.neuron.yale.edu

How do I pass a SectionList() to the master?

How do I pass a SectionList() to the master?

Re: How do I pass a SectionList() to the master?