Real-time performance of commercial Intel-based VME Controllers for the CODA data acquisition system

Conference · Mon Dec 31 23:00:00 EST 2012

DOI:https://doi.org/10.1109/rtc.2012.6418141· OSTI ID:1993822

Moffit, Bryan; Abbott, David; Gu, William; Gyurjyan, Vardan; Heyes, Graham; Jastrzembski, Ed; Timmer, Carl

We have evaluated the performance of several Intel-based VME Controllers for the use in the data acquisition systems (DAQs) at Jefferson Lab. For the 12 GeV upgrade, PPC-based VME controllers running vxWorks will be replaced with those that are Intel-based running Linux. Their task will be facilitated by the use of FPGAs on the VME modules to perform trigger logic and communicating trigger information over serial and fiber connections through the DAQ. The need for a hard realtime operating system on the VME controller is removed from the equation as the readout of the digitized data from the VME modules (using VME-2eSST) is done in a threaded environment with multiple CPU cores while digitization takes place in the buffered, pipelined system. In this paper we brief discuss the 12 GeV Hall D DAQ and the requirements of the VME Controller. We present results from baseline testing of various models from different vendors using different Linux kernels, including results from a kernel compiled with the CONFIG_PREEMPT_RT patch.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1993822
• Report Number(s): JLAB-PHY-12-1594; DOE/OR/23177-2208
• Country of Publication: United States
• Language: English