|Enhanced Job Management Function
|In earlier releases of PE, POE relied on the SP Resource Manager for performing
|job management functions. These functions included keeping track of which nodes
|were available or allocated and loading the switch tables for programs performing
|User Space communications. LoadLeveler, which had only been used for batch job
|submissions in the past, is now replacing the Resource Manager as the job
|management system for PE. One notable effect of this change is that LoadLeveler
|now allows you to run more than one User Space task per node.
| MPI I/O
|With PE 2.4, the MPI library now includes support for a subset of MPI I/O,
|described by Chapter 9 of the MPI-2 document:

MPI-2: Extensions to the

|

Message-Passing Interface, Version 2.0

. MPI-I/O provides a common programming
|interface, improving the portability of code that involves parallel I/O.
|1024 Task Support
|This release of PE supports a maximum of 1024 tasks per User Space MPI/LAPI
|job, as opposed to the previous release, which supported a maximum of 512 tasks.
|For jobs using the IP version of the MPI library, PE supports a maximum of 2048
|tasks.
|Enhanced Compiler Support
|In this release, POE now supports the following compilers:
| C
| C++
|Fortran Version 5
| xlhpf
| Xprofiler Enhancements
|This release includes a variety of enhancements to Xprofiler, including:
|

Save Configuration

and

Load Configuration

options for saving the names of
|functions, currently in the display, and reloading them later in order to
|reconstruct the function call tree.
|An

Undo

option that lets you undo operations that involve adding or removing
|nodes or arcs from the function call tree.
|Message Queue Facility
|The pedb debugger now includes a message queue facility. Part of the pedb
|debugger interface, the message queue viewing feature can help you debug
|Message Passing Interface (MPI) applications by showing internal message request
|queue information. With this feature, you can view:
|A summary of the number of active messages for each task in the application.
|You can select criteria for the summary information based on message type
|and source, destination, and tag filters.
|Message queue information for a specific task.
|Detailed information about a specific message.
xiv IBM PE for AIX V2R4.0: Messages