Matthias Boehm commented on SYSTEMML-2320:

Yeah almost - the degree of parallelism for the entire hierarchy of nodes is 
computed independent of the operator types by another parfor rewrite. In its 
basic form, it would assign a degree of parallelism n=K/k to the remaining ops, 
where K is the maximum parallelism, and k is the parfor degree of parallelism. 
Note that each parfor thread would run an instance of {{paramserv}}, and thus 
in total we have a degree of parallelism of n*k. 

> Parfor integration
> ------------------
>                 Key: SYSTEMML-2320
>                 URL: https://issues.apache.org/jira/browse/SYSTEMML-2320
>             Project: SystemML
>          Issue Type: Sub-task
>            Reporter: LI Guobao
>            Assignee: LI Guobao
>            Priority: Major
> It aims to garanti the robustness for the case that the paramserv function is 
> used inside a parfor statement.

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