CMS DAQ Event Builder Based on Gigabit Ethernet

Quality of Service on Gigabit Ethernet for Event Builder

Congestion avoidance techniques for event builders using switching network technologies is a major issue. Traffic management of the data flow is an essential point to avoid congestion. Global traffic control is one of the mechanisms to manage the traffic. It uses global information of the switching network. While, traffic shaping technique is another mechanism not to use them. Quality of Servic...

The CMS Event Builder Demonstrator based on Myrinet

The data acquisition system for the CMS experiment at the large hadron collider (LHC) will require a large and high performance event building network. Several switch technologies are currently being evaluated in order to compare different architectures for the event builder. One candidate is Myrinet. This paper describes the demonstrator which has been setup to study a small-scale (8x8) event ...

Gigabit Ethernet Switch Gigabit Ethernet Switch

The Internet has created an opportunity for collaboration between scientists at unprecedented levels. Furthermore, in the late 80's, researchers developed general approaches to programmonitoring[1], [2], [3], followed by advances in program adaptation[4] and steering[5]. Speci cally, by coupling program monitoring and steering with online visualizations[6], [7] of scienti c data, it has now bec...

FPGA Communications Based on Gigabit Ethernet

The use of Field Programmable Gate Arrays (FPGAs) in accelerators is widespread due to their flexibility, performance, and affordability. Whether they are used for fast feedback systems, data acquisition, fast communications using custom protocols, or any other application, there is a need for the end-user and the global control software to access FPGA features using a commodity computer. The c...

Gigabit Ethernet Switch Gigabit Ethernet Switch multimedia workstations