IBM SP-2 Scalable Powerparallel System

Hardware:

1. SP-2 Nodes
2. Interprocessor Communication

Software:

1. System Software
2. Parallel Operating Environment
3. Message Passing Library

Performance:

1. Benchmark Results

First Things First:

1. Setting the Environment

Performance:

First Things First:

Setting the Environment:

There are many environment variables and command line flags that you can set to influence the operation on PE tools and the execution of parallel programs. Some of them that critically affect program execution are:

• MP_PROCS: the number of nodes to allocate for your partition
• MP_RESD: specifies whether or not the Partition Manager should connect to the POWERparallel system Resource Manager to allocate nodes. Can be either yes or no.
• MP_HOSTFILE: specifies the name of a host file for node allocation. Can be any file name, NULL or ""
• MP_EUILIB: specifies which CSS library implementation to use for communication. Can be either ip (The Internet Protocol CSS), or us (The User Space CSS - which lets you drive the high-performance switch directly from your parallel tasks without going through the kernel or operating system).
• MP_EUIDEVICE: the adaptor set to use for message passing; either en0 (Ethernet), fi0 (FDDI), tr0 (token-ring), or the css0 (high-performance switch adaptor).
• MP_RMPOOL: the number of the POWERparallel system pool that should be used by the Resource Manager for non-specific node allocation. You may obtain information about available pools by typing "jm_status -P" at the Unix prompt.
• SP_NAME: Specifies the name of the Control Workstation. This variable is used by the System Status Array tool.

For more information please refer to Mitch Murphy's home page

Here are some additional pointers for SP-2 info

Suleyman Cenk Sahinalp, 1995