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XiangShan – Open-source high performance RISC-V processor

github.com Software & code Software projects Hardware & electronics Candidate
Screenshot of github.com captured 2026-07-20
Page preview · captured 2026-07-20

Resurfaced independently across 3 calendar years, with breakout response in 2 of them.

submissions
4
submitters
4
observed span
2021–2025
peak thread · 109 comments
270 pts
latest 20+ return · 2025-01-02
270 pts

Submission timeline

2007–2026

One slot for every year since HN launched. Height is that year's peak points; orange marks a 100+ point or 50+ comment breakout. Select a bar to open its strongest thread.

First comments on top threads

HN comment order

If anyone wants to play arround with simulating it, here is a Dockerfile I use: # Dockerfile FROM ubuntu:24.04 RUN apt-get update && apt-get install -y build-essential clang libclang-dev llvm-dev cmake libspdlog-dev vim git curl wget time default-jre default-jdk RUN git clone --recursive https://github.com/OpenXiangShan/xs-env WORKDIR /xs-env RUN sed 's/apt\S* install/\0 -y/g;s/source /. /g;s/sudo //g' -i ./*.sh RUN . ./env.sh && sed 's/\/master/\/master/g;s/$/; cd \/xs-env/g' -i ./update-submodule.sh &&…

The license in case anyone was wondering: https://spdx.org/licenses/MulanPSL-2.0.html Seems BSD-ish and it is approved by OSI: https://opensource.org/license/mulanpsl-2-0/

rwmj·262-point thread·

A Chisel project. RISC-V offers a great chance for people to create leading CPUs instead of amateur toys, since the performance is not going to be compared with those produced by Intel/AMD by default. This new track populates many projects like this. Chisel also benefits from this trend.

limoce·5-point thread·

The first top-level comment from each of the four biggest threads, in HN’s own order. Excerpts are shortened; open a comment for full context.

Breakout years
2

100+ points or 50+ comments

Total points
542

reference only — not used in Hall rules or ranking

Total comments
208

reference only — not used in Hall rules or ranking

Every submission

DateTitle as submittedByPointsComments
2021-06-27OpenXiangShan, an open-source high-performance RISC-V processor projectbctnry50
2021-12-08XiangShan (香山) is an open-source high-performance RISC-V processor projectDeathArrow51
2023-03-26Open-source high-performance RISC-V processorFirst breakoutburakemir262109
2025-01-02XiangShan – Open-source high performance RISC-V processorBest thread · Latest 20+ point returngjvc27098