Dubhe-100 is a 64-bit RVA23-compliant RISC-V processor core designed for servers, high-performance computing and AI workloads.
StarFive has introduced Dubhe-100, a 64-bit RISC-V processor core designed for servers, high-performance computing and other demanding applications. The core follows the RVA23 profile and uses a deep out-of-order architecture with a 15-stage pipeline and six-wide issue. StarFive reports a SPECint2006 score of 15/GHz.
The core uses the RV64GCBVH instruction set and supports RISC-V Vector and Vector Crypto extensions. It includes multi-core cache coherence, instruction fusion and the Advanced Interrupt Architecture 1.0. Its vector processing unit supports integer and floating-point operations, including BF16, with a 256-bit vector length.
Dubhe-100 also includes hardware performance monitoring, physical memory protection and attribute support, standard RISC-V debug and trace interfaces, and configurable memory-management features. Power-management functions include core and cluster-level clock gating, low-power states and cluster-level frequency scaling.
For software development, StarFive provides the StarStudio integrated development environment with separate bare-metal and Linux software development kits. The bare-metal SDK includes GCC/LLVM toolchains, GDB, OpenOCD and example projects, while the Linux SDK includes Yocto, Linux Kernel 6.18, OpenSBI, U-Boot and host development tools.
One of the first customers for Dubhe-100 is LECARC, which is developing a server system-on-chip using the core. StarFive also expects the architecture to be used in high-performance computing and datacentre systems, as well as chips for large-language-model inference, AI agents, computer vision and infrastructure applications such as SmartNIC and distributed-storage controllers.
