Vortex RISC-V GPGPU

Vortex is a full-system RISCV-based GPGPU processor.

Specifications

• Support RISC-V RV32IMAF & RV64IMAFD ISAs
• Performance:
  • 1024 total threads running at 250 MHz
  • 128 Gflops of compute bandwidth
  • 16 GB/s of memory bandwidth
• Scalability: up to 64 cores with optional L2 and L3 caches
• Software: OpenCL 1.2 Support
• Supported FPGAs:
  • Intel Arria 10
  • Intel Stratix 10

Directory structure

• doc: Documentation.
• hw: Hardware sources.
• driver: Host drivers repository.
• runtime: Kernel Runtime software.
• sim: Simulators repository.
• tests: Tests repository.
• ci: Continuous integration scripts.
• miscs: Miscellaneous resources.

Build Instructions

Supported OS Platforms

• Ubuntu 18.04
• Centos 7

Toolchain Dependencies

• POCL
• LLVM
• RISCV-GNU-TOOLCHAIN
• Verilator

Install development tools

$ sudo apt-get install build-essential
$ sudo apt-get install git

Install Vortex codebase

$ git clone --recursive https://github.com/vortexgpgpu/vortex-dev.git
$ cd Vortex

Install prebuilt toolchain

$ ./ci/toolchain_install.sh -all

By default, the toolchain will install to /opt folder. You can install the toolchain to a different directory by overiding DESTDIR.

$ DESTDIR=$TOOLDIR ./ci/toolchain_install.sh -all
$ export VORTEX_HOME=$TOOLDIR/vortex-gfx
$ export LLVM_VORTEX=$TOOLDIR/llvm-vortex
$ export RISCV_TOOLCHAIN_PATH=$TOOLDIR/riscv64-gnu-toolchain
$ export VERILATOR_ROOT=$TOOLDIR/verilator
$ export PATH=$VERILATOR_ROOT/bin:$PATH 

Build Vortex sources

$ make -s

Quick demo running vecadd OpenCL kernel on 2 cores

$ ./ci/blackbox.sh --driver=rtlsim --cores=2 --app=vecadd