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NUMA Data Placement Tools

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Message Passing Toolkit

The SGI Message Passing Toolkit (MPT) provides industry-standard message passing

libraries optimized for SGI computers. On Linux, MPT contains MPI and SHMEMAPIs,

which transparently utilize and exploit the low-level capabilities within SGI hardware,

such as memory mapping within and between partitions for fast memory-to-memory

transfers and the hardware memory controller’s fetch operation (fetchop) support.

Fetchops and other shared memory techniques enable ultra fast communication and

synchronization between MPI processes in a parallel application.

MPI jobs can be launched, monitored, and controlled across a cluster or partitioned

system using the SGI Array Services software. Array Services provides the notion of an

array session, which is a set of processes that can be running on different cluster nodes

or system partitions.ArrayServicesisimplementedusingProcess Aggregates (PAGGs),

which is a kernel module that provides process containers. PAGGs has been

open-sourced by SGI for Linux.

For more information on the Message Passing Toolkit, see the Message Passing Toolkit

(MPT) User’s Guide.

Performance Co-Pilot

The SGI Performance Co-Pilot software was ported from IRIX to Linux to provide a

collectionofperformancemonitoringandperformancemanagementservicestargetedat

large, complex systems. Integrated with the low-level performance hardware counters

and with MPT, Performance Co-Pilot provides such services as CPU, I/O, and

networking statistics; visualization tools; and monitoring tools.

For more information on Performance Co-Pilot, see the Performance Co-Pilot for IA-64

Linux User's and Administrator's Guide.

NUMA Data Placement Tools

This section describes the commands that are currently provided with the collection of

NUMA related data placement toolsthat can help youwith tuning applications onyour

system.

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