A 410 GFLOP/s, 64 RISC-V Cores, 204.8 GBps Shared-Memory Cluster in 12 nm FinFET with Systolic Execution Support for Efficient B5G/6G AI-Enhanced O-RAN

We present HeartStream, a 64-RV-core shared-L1-memory cluster (410 GFLOP/s peak performance and 204.8 GBps L1 bandwidth) for energy-efficient AI-enhanced O-RAN. The cores and cluster architecture are customized for baseband processing, supporting complex (16-bit real&imaginary) instructions: multiply&accumulate, division&square-root, SIMD instructions, and hardware-managed systolic queues, improving up to <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$1.89 \times$</tex> the energy efficiency of key baseband kernels. At 800 [email protected] V, HeartStream delivers up to 243 GFLOP/s on complex-valued wireless workloads. Furthermore, the cores also support efficient AI processing on received data at up to 72 GOP/s. HeartStream is fully compatible with base station power and processing latency limits: it achieves leading-edge software-defined PUSCH efficiency (49.6 GFLOP/s/W) and consumes just 0.68 W(645 [email protected] V, within the 4 ms end-to-end constraint for B5G/6G uplink.

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Published
2025-09-08
DOI
https://doi.org/10.1109/esserc66193.2025.11214075
Primary Topic
Parallel Computing and Optimization Techniques
Type
article
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article

A 410 GFLOP/s, 64 RISC-V Cores, 204.8 GBps Shared-Memory Cluster in 12 nm FinFET with Systolic Execution Support for Efficient B5G/6G AI-Enhanced O-RAN

Samuel Riedel, Marco Bertuletti, Luca Benini, Sergio Mazzola et al.
Parallel Computing and Optimization Techniques
article

A 410 GFLOP/s, 64 RISC-V Cores, 204.8 GBps Shared-Memory Cluster in 12 nm FinFET with Systolic Execution Support for Efficient B5G/6G AI-Enhanced O-RAN

Samuel Riedel, Marco Bertuletti, Luca Benini, Sergio Mazzola, Yichao Zhang
article en

Abstract

We present HeartStream, a 64-RV-core shared-L1-memory cluster (410 GFLOP/s peak performance and 204.8 GBps L1 bandwidth) for energy-efficient AI-enhanced O-RAN. The cores and cluster architecture are customized for baseband processing, supporting complex (16-bit real&imaginary) instructions: multiply&accumulate, division&square-root, SIMD instructions, and hardware-managed systolic queues, improving up to <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$1.89 \times$</tex> the energy efficiency of key baseband kernels. At 800 [email protected] V, HeartStream delivers up to 243 GFLOP/s on complex-valued wireless workloads. Furthermore, the cores also support efficient AI processing on received data at up to 72 GOP/s. HeartStream is fully compatible with base station power and processing latency limits: it achieves leading-edge software-defined PUSCH efficiency (49.6 GFLOP/s/W) and consumes just 0.68 W(645 [email protected] V, within the 4 ms end-to-end constraint for B5G/6G uplink.

Institute for Ethnic Studies (SI)
Openalex Percentile: Top 64%
Parallel Computing and Optimization Techniques
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A 410 GFLOP/s, 64 RISC-V Cores, 204.8 GBps Shared-Memory Cluster in 12 nm FinFET with Systolic Execution Support for Efficient B5G/6G AI-Enhanced O-RAN — Samuel Riedel, Marco Bertuletti, et al. · (2025) | TGRS Research Map | TGRS