20 research outputs found
PEZY-SC3: A MIMD Many-core Processor for Energy-efficient Computing
PEZY-SC3 is a highly energy- and area-efficient processor for supercomputers
developed using TSMC 7nm process technology. It is the third generation of the
PEZY-SCx series developed by PEZY Computing, K.K. Supercomputers equipped with
the PEZY-SCx series have been deployed at several research centers and are used
for large scale scientific calculations.
PEZY-SC3 outperforms previous PEZY-SCx and other processors in terms of
energy and area efficiency. To achieve high efficiency, PEZY-SC3 employs a MIMD
many-core, fine-grained multithreading, and non-coherent cache, focusing on
applications involving high thread-level parallelism. Our MIMD many-core-based
architecture achieves high efficiency while providing higher programmability
than existing architectures based on specialized tensor units with limited
functionality or wide-SIMD. Another key point of this architecture is to
achieve both high efficiency and high throughput without using complex and
expensive units such as out-of-order schedulers. Moreover, our novel
non-coherent and hierarchical cache system enables high scalability on
many-core without compromising programmability.
The energy efficiency of a system equipped with PEZY-SC3 is approximately
24.6 GFlops/W, and it ranked 12th in the Green500 (November 2021), which
measures the energy efficiency of supercomputers. In terms of processor
architecture, all the systems ranked higher than the PEZY-SC3 system are
equipped with NVIDIA A100 or Preferred Networks NM-Core, and thus PEZY-SC3 is
the third-ranked processor after them. While A100 and NM-Core achieve high
energy efficiency with tensor units specialized for specific functions,
PEZY-SC3 does not have such specialized tensor units and thus has higher
programmability