Abstract | Papers by
Author | in (
Plenary |
Parallel |
Poster |
Summary ) Sessions
[Next]
STUDIES ON SWITCH-BASED EVENT BUILDING SYSTEMS IN RD13
C.P. Bee*1,
S. Eshghi*2, R. Jones,
S. Kolos*3, C. Magherini,
C. Maidantchik*4,
L. Mapelli*5,
G. Mornacchi*6,
M. Niculescui,
R. Spiwoks*8,
I. Solovievc.
CERN, Geneva, Switzerland
M. Caprini*9,
P.Y. Duval,
F. Etienne,
D. Ferrato,
A. Le Van Suu,
Z. Qian,
Centre de Physique des Particules de Marseille, IN2P3, France
I. Gaponenko,
Y. Merzliakov
Budker Institute of Nuclear Physics, Novosibirsk, Russia
G. Ambrosini*10,
R. Ferrari,
G. Fumagalli,
G. Polesello
Dipartimento di Fisica dell'Universita' e Sezione INFN di Pavia, Italy
One of the goals of the RD13 project at CERN is to investigate the feasibility of parallel event building system for detectors at the LHC. Studies were performed by building a prototype based on the HiPPI standard and by modelling this prototype and extended architectures with MODSIM II.
The prototype used commercially available VME-HiPPI interfaces and a HiPPI switch together with a modular software. The setup was tested successfully as a parallel event building system in different configurations and with different data flow control schemes. The simulation program was used with realistic parameters from the prototype measurements to simulate large-scale event building systems. This includes simulations of a realistic setup of the ATLAS event building system. The influence of different parameters and scaling behavior were investigated. The influence of realistic event size distributions was checked with data from off-line simulations. Different control schemes for destination assignment and traffic shaping were investigated as well as a two-stage event building system.
Contents :
- 1 - Introduction
-
- 2 - Event Building Prototype
-
- 2.1 - Hardware
-
- 2.2 - Software
-
- 2.3 - Performance
-
- 3 - Modelling of Event Building Systems
-
- 3.1 - Simulation Program
-
- 3.2 - Simple Model
-
- Generic studies based on the parameters from the prototype show that with a round-robin destination assignment, the event building system runs in a "barrel shifter" mode. The efficiency e is defined by
-
-
-
- where
-
- 3.3 - ATLAS Event Building
-
- 4 - Data Flow Control Schemes
-
- 4.1 - Destination Assignment
-
- 4.2 - Traffic Shaping
-
- 4.3 - Two-Stage Event Building System
-
- 5 - Summary
-
- Acknowledgments
-
- References
-
RD13 - 27 SEP 95
[Next]
Generated with CERN WebMaker