Speaker
Takeo Higuchi
(KEK)
Description
We present performance study of a high-speed RocketIO receiver card
implemented as PCI-express device intended for the use in future
luminosity-frontier HEP experiment.
To search for a new physics beyond the Standard Model, we start
Belle II experiment from 2015 in KEK, Japan. In Belle II, the
detector signals are digitized in or nearby the detector complex, and
the digitized signals are transmitted to VME-9U sized data receiving
boards located about 10m away from the detector over RocketIO optical
links. The data receiving board is responsible to provide pipeline,
online data processor, and Ethernet outlet connected to external
event building PC. For a possible future upgrade of the data receiving
board, we design a RocketIO receiver card to be attached to a PC as
a PCI-express device.
In addition to above, the device is a backup solution for a data
receiver from DEPFET pixel detectors of Belle II. In the backup
solution, we plan to process the pixel data using GPUs.
We study firmware performance implemented in a prototype device,
which has (up to) four optical input and eight lanes of PCI-express
output. Data transfer throughputs for input line cases of one and four
are measured 3.7Gbps and 11.8Gbps, respectively.
The first version card next to the prototype is under development and
will be delivered by March 2012. Performance study of the first version
card will also be presented as well.
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Authors
Prof.
Nobuhiko Katayama
(HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION)
Takeo Higuchi
(KEK)
