The SPring-8 controls network has maintained accelerator operations in high reliability and shown good performance during the past years. To cope with the increase of loads on the network due to faster data acquisition and the addition of equipment data, networking hardware has been installed in the last few years. The upgraded network replaces the original FDDI backbone and switches with mixed...

Low latency and high bandwidth networking is essential for cluster computing and System-Area-Networks (SAN). The performance of a SAN optimized interconnect, Myrinet, is compared with gigabit Ethernet running TCP/IP. Though Myrinet has lower latencies and higher throughput than gigabit Ethernet, it is found that an efficient implementation of message passing interface library over TCP/IP achiev...

The creation of ever more realistic images is central to many elds ranging from the animation industry to education, and ray tracing is one of the most popular and powerful means by which photo-realistic images can be created. In this paper, we report on porting, measuring and optimizing a ray tracer on cluster computers. We investigate (A) the impact of different hardware decisions (interconne...

In this paper we report about the recently completed porting of the Genoa Active Message MAchine (GAMMA) to the Netgear GA620 Gigabit Ethernet adapter. Such device is a low-cost (less than 300 US dollars at the time of writing) Gigabit Ethernet adapter with a state-of-art internal architecture based on two programmable on-board processors and substantial amount of on-board RAM, which makes this...

There is a strong interest of using the cheap and simple Ethernet technology for industrial and embedded systems. This far, however, the lack of real-time services has prevented this change of used network technology. This paper presents enhancements to full-duplex switched Ethernet for the ability of giving throughput and delay guarantees. The switch and the end-nodes controls the real-time tr...

There is a strong interest of using the cheap and simple Ethernet technology for industrial and embedded systems. This far, however, the lack of real-time services has prevented this change of used network technology. This paper presents enhancements to full-duplex switched Ethernet for the ability of giving throughput and delay guarantees. The switch and the end-nodes controls the real-time tr...

A 1,000-fps visual tracking system over a realtime network based on the standard Ethernet and UDP/IP technologies is presented. The system consists of a high-speed vision system, a host PC that executes motor-control tasks on an RTOS, and an easyto-construct configuration for real-time communication to deliver the high-speed visual feature information obtained by the vision system to the host P...

There is a strong interest of using the cheap and simple Ethernet technology for industrial and embedded systems. This far, however, the lack of real-time services has prevented this change of used network technology. This paper presents enhancements to full-duplex switched Ethernet for the ability of giving throughput and delay guarantees. The switch and the end-nodes controls the real-time tr...