[jira] [Resolved] (SINGA-156) Remove the dependency on ZMQ for single process training

["wangwei (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SINGA-156?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

wangwei resolved SINGA-156.
---------------------------
    Resolution: Fixed
      Assignee: wangwei

> Remove the dependency on ZMQ for single process training
> --------------------------------------------------------
>
>                 Key: SINGA-156
>                 URL: https://issues.apache.org/jira/browse/SINGA-156
>             Project: Singa
>          Issue Type: Improvement
>            Reporter: wangwei
>            Assignee: wangwei
>
> SINGA depends on ZMQ and CZMQ, which are used for both intra and inter process communication.
> In fact, for training using a single process (multiple threads), we can avoid ZMQ and CZMQ for the intra-process communication. Hence, we can compile SINGA without ZMQ and CZMQ for single process training.
> This ticket implements the intra-process communication by assigning a thread-safe queue for each socket (i.e., dealer and router). The sender pushes the msg onto the receiver's queue. 
> There is a macro 'USE_ZMQ', which controls the compiling of ZMQ related code. If USE_ZMQ is not defined, SINGA can only run for single process. Otherwise, SINGA uses ZMQ for inter-process communication for training over multiple processes.



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