RACEway Broadcast Support, Software

RACEway Broadcast Support

The PowerPC compute node supports RACEway crossbar broadcast capabilities for enhanced bandwidth utilization when sending the same data to multiple nodes. This hardware broadcast also reduces latency compared to software-based schemes that emulate a hardware broadcast by repetitively sending the same data in separate transfers.

As the initiator of a broadcast, either the PowerPC processor or the DMA controller may use any of the broad- cast or multicast modes provided by the RACEway crossbar. As a receiver of broadcast data, the PowerPC CN has the programmable option of accepting or ignoring the data.

Software

Mercury also provides programming tools that simplify development and testing of real-time applications. The RACE++ Series MULTI® Integrated Development Environment (IDE) enables programmers to use familiar, mainstream tools to develop real-time processing routines. The MULTI IDE's integrated debug, program build, profiling, and version control facilities streamline development of complex multiprocessor software.

Mercury's Scientific Algorithm Library (SAL) provides the industry's easiest method of accessing the full power of the AltiVec vector unit. The SAL contains hundreds of image and signal processing functions that are optimized for AltiVec exe- cution. These high-performance algorithms can also be accessed through the industry-standard VSIPL interface using Mercury's VSIPL-Lite signal processing library. For applica- tions that require custom algorithms with demanding vector processing requirements, Mercury's C compiler includes the AltiVec C extensions that allow direct access to the AltiVec vector unit.

The TATL™ Trace Analysis Tool and Library from Mercury is also available to assist during software development and debugging. TATL is a minimally intrusive software logic analyzer that allows developers to visualize multiprocessor interactions. Using TATL, developers can spot bottlenecks, such as contention for shared resources or load imbalances.

Electrical/Mechanical Specifications

	P2J256J-ROC
RACEway ports	2
Processor frequency	500 MHz
Compute nodes	2
Memory frequency	125 MHz
SDRAM per CN	256 Mbytes
SDRAM per daughtercard	512 Mbytes
L2 cache frequency	250 MHz
L2 cache per CN	2 Mbytes
Weight	0.43 pounds*
Dimensions	5.0" x 4.435"
Power consumption**	20.8 W
Daughtercards per MCJ6***	2
Daughtercards per MCJ9	8

*Rugged version weighs an additional 0.01 pounds

**Maximum typical power consumption measured with concurrent FFTs and I/O

***Requires 5-row connectors on MCJ6 and VME backplane

Commercial Environmental Specifications

Operating	0°C to 40°C up to an altitude of 10,000 feet
temperature	0°C to 40°C up to an altitude of 10,000 feet
(inlet air temperature at motherboard's recommended minimum airflow)
Storage temperature	-40°C to 85°C
Relative humidity	10 to 90% (non-condensing)

As altitude increases, air density decreases, hence the cooling effect of a particular CFM rating decreases. Many manufacturers specify altitude and temperature ranges that are not simultaneous. Notice that the above operating temperature is specified simultaneously with an altitude. Different limits can be achieved by trading among altitude, temperature, performance, and airflow.

Contact Mercury for more information.

For large-scale programming, the Parallel Acceleration System (PAS™) supports data reorganization techniques for a wide variety of efficient and scalable programming models, by means of a high-level set of library calls. Scaling is achieved by changing runtime variables rather than recompiling

the core code.

For more information, go to www.mc.com

RACE++ is a registered trademark, and PAS, RACE Series and the RACE logo, and TATL are trademarks of Mercury Computer
Systems, Inc. AltiVec is a trademark of Motorola, Inc. PowerPC is a registered trademark of IBM Corp. Other products mentioned
may be trademarks or registered trademarks of their respective holders. Mercury Computer Systems, Inc. believes this information
is accurate as of its publication date and is not responsible for any inadvertent errors. The information contained herein is subject to
change without notice.
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