Concurrent's RedHawk Linux Version 1.1 Now Available; New Operating System Offers Superior Real-time Performance on Concurrent's Intel-based iHawk Systems.

Business Editors/Technology Writers

FORT LAUDERDALE, Fla.--(BUSINESS WIRE)--Sept. 30, 2002

Concurrent Computer Corporation (Nasdaq:CCUR), Real-Time Division, today announced the availability of RedHawk(TM) Linux(R) version 1.1. This enhanced version of the open source Linux operating system is now shipping with Concurrent's iHawk(TM) high-performance, Intel(R)-based multiprocessor computer systems.

Based on the popular Red Hat(R) Linux, RedHawk is an industry-standard POSIX-compliant, real-time version of the open source Linux kernel. Ideally suited for the most complex real-time applications, RedHawk 1.1 running on iHawk systems offers a streamlined solution for simulation, data acquisition, and industrial system control environments. RedHawk 1.1 features high I/O throughput, fast response to external events, and optimized inter-process communication. Orders for RedHawk have been received from countries including Australia, Germany, Japan, Sweden, and the U.S. for such demanding applications as flight and missile simulation.

"Linux is widely used for software development, and it is renowned for its speed, reliability, portability, and open source following," said Paul C. Meyer, president of Concurrent's Real-Time Division. "RedHawk is a unique real-time Linux OS and is proof of the continued commitment to our growing list of customers who require real-time solutions."

iHawk Systems

Concurrent iHawk systems are real-time Intel-based multiprocessors employing from one to eight Pentium(R) Xeon(TM) CPUs with up to 16 GB of memory and high-performance PCI I/O. iHawk systems offer the latest in integrated circuit and packaging technology. All CPUs in a system are linked by a high-speed processor bus and have direct, cache-coherent access to all of main memory. iHawk systems are available in a variety of rackmount and tower enclosures. iHawk workstation I/O options include high-performance AGP 3D graphics with OpenGL.

Red Hat Compatible

RedHawk Linux user-level commands, utilities, and system administration are standard Red Hat. RedHawk achieves real-time performance by replacing the Red Hat kernel with a multithreaded, fully-preemptable kernel with low-latency enhancements. RedHawk's true symmetric multiprocessing support includes load-balancing and CPU shielding to maximize determinism and real-time performance in mission-critical solutions.

Complete Development Environment

RedHawk Linux offers a full set of tools for efficient development of real-time applications. In addition to the GNU C, C++, and Fortran compilers and the GNU debugger, RedHawk supports Concurrent's powerful real-time tool set - the NightView(TM) source-level debugger, the NightTrace(TM) run-time analyzer, the NightSim(TM) periodic scheduler, and the NightProbe(TM) data monitor. These tools provide a robust graphic interface for non-intrusive control, monitoring, analysis, and debugging of real-time multiprocessing applications.

True Real-Time Linux

RedHawk is a true real-time variant of the standard Linux operating system. RedHawk provides a single kernel programming environment that directly controls all system operation. Complex real-time applications often require that file I/O, networking, and graphics be controlled deterministically together with real-time tasks. Only RedHawk's single-kernel design ensures this determinism. In tightly-coupled symmetric multiprocessing systems such as Concurrent's iHawk real-time systems, RedHawk Linux allows individual CPUs to be shielded from interrupt processing, daemons, bottom halves, and other Linux tasks. Processor shielding provides a highly deterministic execution environment where interrupt response is guaranteed.

Multithreading and Preemption 

The RedHawk Linux kernel allows multiple processes to execute in the kernel simultaneously. The kernel protects key data structures and critical sections of code with semaphores and spin locks to preserve system integrity. User processes contend with each other only when requesting an identical resource. Otherwise, all kernel features and capabilities are available to all processes. Processes executing in the RedHawk kernel can also be preempted, i.e. forced to relinquish a CPU involuntarily. The RedHawk kernel can transfer control from a lower-priority process to a higher-priority process. This allows a high-priority process waiting for an external event to respond immediately when the event occurs, even when the CPU is currently in use.

Concurrent Professional Services

Concurrent's Professional Services Group is available to design and deliver customized iHawk systems running RedHawk Linux for customers who require complete competitive solutions for demanding real-time applications. Concurrent engineers can provide special packaging including ruggedized peripherals and enclosures, integrate third-party I/O cards, develop and integrate RedHawk Linux drivers, and perform application rehosting.

About Concurrent

Celebrating over 35 successful years in business, Concurrent Computer Corporation (http://www.ccur.com), headquartered in Atlanta, Georgia, is the premier provider of high-performance, real-time computer systems, solutions, and software for commercial and government markets. The company's Real-Time Division focuses on strategic market areas that include hardware-in-the-loop and man-in-the-loop simulation, data acquisition, industrial systems, and software. Concurrent Computer Corporation's XSTREME Division is a leading supplier in the emerging digital video server marketplace. This market includes the broadband/cable, corporate training, education, hospitality, and video to the home. Concurrent provides sales and support from offices throughout North America, Europe, Asia, and Australia.

Certain statements made in this press release constitute "forward-looking statements" within the meaning of the federal securities laws. The words "believes," "expects," "estimates," and similar expressions are intended to identify forward-looking statements. Statements regarding future events and developments and our future performance, as well as our expectations, beliefs, plans, estimates, or projections relating to the future, are forward-looking statements within the meaning of these laws. All forward-looking statements are subject to certain risks and uncertainties that could cause actual events to differ materially from those projected. The risks and uncertainties which could affect our performance or results include, without limitation: delays or cancellations of customer orders; changes in product demand; economic conditions; various inventory risks due to changes in market conditions; uncertainties relating to the development and ownership of intellectual property; uncertainties relating to our ability and the ability of other companies to enforce their intellectual property rights; the pricing and availability of equipment, materials, and inventories; the concentration of our customers; delays in testing and introductions of new products; rapid technology changes; the shift in demand from high-priced, proprietary real-time systems to low-priced, open server systems; system errors or failures; reliance upon a limited number of suppliers; uncertainties associated with international business activities, including, foreign regulations, trade controls, taxes, and currency fluctuations; relatively long sales cycles resulting from the complexity of our products; the highly competitive environment in which we operate; and the entry of new, well-capitalized competitors into our markets and other risks and uncertainties.

Other important risk factors are discussed in our Form 10-K filed with the Securities and Exchange Commission on September 25, 2002 and may be discussed in subsequent filings with the SEC. Our forward-looking statements are based on current expectations and speak only as of the date of such statements. We undertake no obligation to publicly update or revise any forward-looking statement, whether as a result of future events, new information, or otherwise.

Note to Editors: For additional company or product information from Concurrent Computer Corporation, please contact Concurrent Computer Corporation, 4375 River Green Parkway, Duluth, GA 30096. Call toll free in the U.S. and Canada at [phone], fax [phone]. Readers can also access information through the company's Web site at http://www.ccur.com.

Concurrent Computer Corporation, its logo, RedHawk, iHawk, NighTrace, NightSim, and NightProbe are registered and unregistered trademarks of Concurrent Computer Corporation. The registered trademark Linux(R) is used pursuant to a sublicense from the Linux Mark Institute, the exclusive licensee of Linus Torvalds, owner of the mark on a world-wide basis. All other trademarks are the property of their respective owners.