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UNILOGIC: a novel architecture for highly parallel reconfigurable systems

Ioannou Angelos, Georgopoulos Konstantinos, Malakonakis Pavlos, Pnevmatikatos Dionysios, Papaefstathiou Vassilis D., Papaefstathiou Ioannis, Mavroidis Iakovos

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URIhttp://purl.tuc.gr/dl/dias/585EF5AA-18C2-49C1-8693-872CB86546A6-
Identifierhttps://doi.org/10.1145/3409115-
Identifierhttps://dl.acm.org/doi/10.1145/3409115-
Languageen-
Extent32 pagesen
TitleUNILOGIC: a novel architecture for highly parallel reconfigurable systemsen
CreatorIoannou Angelosen
CreatorΙωαννου Αγγελοςel
CreatorGeorgopoulos Konstantinosen
CreatorΓεωργοπουλος Κωνσταντινοςel
CreatorMalakonakis Pavlosen
CreatorΜαλακωνακης Παυλοςel
CreatorPnevmatikatos Dionysiosen
CreatorΠνευματικατος Διονυσιοςel
CreatorPapaefstathiou Vassilis D.en
CreatorPapaefstathiou Ioannisen
CreatorΠαπαευσταθιου Ιωαννηςel
CreatorMavroidis Iakovosen
PublisherAssociation for Computing Machinery (ACM)en
Content SummaryOne of the main characteristics of High-performance Computing (HPC) applications is that they become increasingly performance and power demanding, pushing HPC systems to their limits. Existing HPC systems have not yet reached exascale performance mainly due to power limitations. Extrapolating from today’s top HPC systems, about 100–200 MWatts would be required to sustain an exaflop-level of performance. A promising solution for tackling power limitations is the deployment of energy-efficient reconfigurable resources (in the form of Field-programmable Gate Arrays (FPGAs)) tightly integrated with conventional CPUs. However, current FPGA tools and programming environments are optimized for accelerating a single application or even task on a single FPGA device. In this work, we present UNILOGIC (Unified Logic), a novel HPC-tailored parallel architecture that efficiently incorporates FPGAs. UNILOGIC adopts the Partitioned Global Address Space (PGAS) model and extends it to include hardware accelerators, i.e., tasks implemented on the reconfigurable resources. The main advantages of UNILOGIC are that (i) the hardware accelerators can be accessed directly by any processor in the system, and (ii) the hardware accelerators can access any memory location in the system. In this way, the proposed architecture offers a unified environment where all the reconfigurable resources can be seamlessly used by any processor/operating system. The UNILOGIC architecture also provides hardware virtualization of the reconfigurable logic so that the hardware accelerators can be shared among multiple applications or tasks. The FPGA layer of the architecture is implemented by splitting its reconfigurable resources into (i) a static partition, which provides the PGAS-related communication infrastructure, and (ii) fixed-size and dynamically reconfigurable slots that can be programmed and accessed independently or combined together to support both fine and coarse grain reconfiguration.1 Finally, the UNILOGIC architecture has been evaluated on a custom prototype that consists of two 1U chassis, each of which includes eight interconnected daughter boards, called Quad-FPGA Daughter Boards (QFDBs); each QFDB supports four tightly coupled Xilinx Zynq Ultrascale+ MPSoCs as well as 64 Gigabytes of DDR4 memory, and thus, the prototype features a total of 64 Zynq MPSoCs and 1 Terabyte of memory. We tuned and evaluated the UNILOGIC prototype using both low-level (baremetal) performance tests, as well as two popular real-world HPC applications, one compute-intensive and one data-intensive. Our evaluation shows that UNILOGIC offers impressive performance that ranges from being 2.5 to 400 times faster and 46 to 300 times more energy efficient compared to conventional parallel systems utilizing only high-end CPUs, while it also outperforms GPUs by a factor ranging from 3 to 6 times in terms of time to solution, and from 10 to 20 times in terms of energy to solution.en
Type of ItemPeer-Reviewed Journal Publicationen
Type of ItemΔημοσίευση σε Περιοδικό με Κριτέςel
Licensehttp://creativecommons.org/licenses/by/4.0/en
Date of Item2021-05-14-
Date of Publication2020-
SubjectAcceleratorsen
SubjectPartial reconfigurationen
SubjectFPGA unificationen
SubjectPrototypingen
Bibliographic CitationA. D. Ioannou, K. Georgopoulos, P. Malakonakis, D. N. Pnevmatikatos, V. D. Papaefstathiou, I. Papaefstathiou, and I. Mavroidis, “UNILOGIC: a novel architecture for highly parallel reconfigurable systems,” ACM T. Reconfigurable Technol. Syst., vol. 13, no. 4, pp. 1–32, Oct. 2020. doi: 10.1145/3409115en

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