Speaker
Description
Within the RADIOBLOCKS EU project, JIVE, in collaboration with
partners, is investigating state-of the art accelerator technologies
for implementing a correlator for Very Long Baseline Interferometry
(VLBI). In particular we are developing GPU kernels that implement
the same algorithm as the SFXC CPU correlator. SFXC is the current
production correlator for the European VLBI Network (EVN). This
development will provide re-usable VLBI delay and Windowed Overlap
(WOLA) filter modules (which we call Radio Blocks) that can be
combined with the Tensor Core Correlator Radio Block developed by our
project partner ASTRON to implement a VLBI correlator as well as
additional modules to implement coherent de-dispersion and multiple
field center correlation. We also developed a wrapper library for UCX
that allows efficient transfer of sampled baseband data directly into
GPU memory. The result is a correlator that uses almost no CPU
cycles. Initial power consumption estimates indicate that with these
technologies we can build a correlator that is significantly more
efficient than the existing EVN data processor at JIVE (SFXC). This
poster will present the technologies that make this possible, discuss
the current power consumption estimates and the scalability.
| Affiliation of the submitter | Joint Institute for VLBI ERIC |
|---|---|
| Attendance | in-person |
