AR# 10511

Description

How do I run multiple MPPR jobs on a single multi-processor machine?

Solution

PAR supports the use of a node list file that defines a list of host machines to be used for concurrent Place and Route passes while running multi-pass place and route (MPPR).  

This feature was not designed to accept multiple entries using the same host name for multi-processor machines, but there is a simple way to "trick" PAR into doing this. 

Host names are case insensitive, but PAR itself is case-sensitive. By using multiple entries with variations of mixed case, PAR will be tricked into thinking it is dealing with different hosts; in fact, the jobs will run on the same host. 

Below is an example of a node list file for a four-processor machine named host1: 

host1 

Host1 

HOst1 

HOSt1