GTgtirloni·Oct 24, 2025Submission
4 points · Open discussionLekKit
RVVM
C2021–2025
LekKit / RVVM
RVVM
The RISC-V Virtual Machine
7Distinct people
8Mentions
0Explicit recommenders
1.3KGitHub stars
What to know before exploring
What it is
The RISC-V Virtual Machine
GitHub
Where it is used
No documented product use has been verified yet.
What people are saying
No recommendation phrase was found in the indexed comments.
No classified warning is attached to this page. Read the discussions before treating silence as approval.
Also in these discussions
No other repository is repeatedly linked in the same discussions.
This week on Hacker News
Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 1:49:46 PM UTC.
No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.
Mentions over time
HN mentions by year8 dated mentions
Observed mentions: 2021-07-22 13:44:16 UTC to 2025-10-24 12:39:43 UTC.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| 2021 | 2021-01-01 00:00:00 UTC | 2022-01-01 00:00:00 UTC | 1 | 1 | 0 |
| 2022 | 2022-01-01 00:00:00 UTC | 2023-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2023 | 2023-01-01 00:00:00 UTC | 2024-01-01 00:00:00 UTC | 4 | 1 | 3 |
| 2024 | 2024-01-01 00:00:00 UTC | 2025-01-01 00:00:00 UTC | 1 | 0 | 1 |
| 2025 | 2025-01-01 00:00:00 UTC | 2026-01-01 00:00:00 UTC | 2 | 2 | 0 |
What Hacker News says
8 sources> RISC-V is not byte code though
It is if a byte is 16 bits.
> it was not designed for efficient execution by a software interpreter.
It's not bad at all for that. On my i9-13900HX laptop, if I take http://hoult.org/primes.txt and compile it for x86 and for RISC-V:
- 5.6 seconds for riscv64-linux-gnu-gcc -O primes.c -o prime run in QEMU [1]
- 3.8 seconds for gcc primes.c -o primes run natively
- 2.0 seconds for gcc -O primes.c -o primes run natively
Emulating RISC-V is worse than forgetting to compile with `-O`, but not much. It's far faster than Python or Ruby and comparable to Java, C#, JavaScript, or WebASM.
Also, QEMU is not the fastest emulator around, just the most flexible and complete. The experimental RV8 and the nearly-ready-for-prime-time RVVM [2] are much closer to native speeds.
Note that if I do exactly the same thing for ar
Read the rest
m64 (i.e. docker/QEMU) the primes program takes 14.4 seconds and the whole Ubuntu in docker experience just feels a lot more laggy. Running the x86_864 binary in qemu-x86_64 instead of natively takes 10.5 seconds.
RISC-V is a lot easier to emulate quickly than Aarch64 or x86.
[1] or if you have Docker Desktop (on Mac, Windows, or Linux) then you can just work like a native:
bruce@i9:~$ docker run --platform linux/riscv64 -it riscv64/ubuntu
Unable to find image 'riscv64/ubuntu:latest' locally
latest: Pulling from riscv64/ubuntu
53300d777b1a: Pull complete
Digest: sha256:6a392b2c64f4e0021bfcff62e58975ddce0f1eccc5a72708b114aeb50999ff22
Status: Downloaded newer image for riscv64/ubuntu:latest
root@5f2edc942403:/# apt update
:
root@5f2edc942403:/# apt install wget gcc
:
root@5f2edc942403:/# wget -q http://hoult.org/primes.txt
root@5f2edc942403:/# mv primes.txt primes.c
root@5f2edc942403:/# gcc -O primes.c -o primes
root@5f2edc942403:/# ./primes
Starting run
3713160 primes found in 5609 ms
216 bytes of code in countPrimes()
root@5f2edc942403:/#
[2] https://github.com/LekKit/RVVM
An issue and discussion of if now:
https://github.com/LekKit/RVVM/issues/77
This is not commercial and the terms for the logo is:
“(..) The RISC-V trade mark or the RISC-V logo may be freely used for non-commercial research
and academic projects as long as the guidelines below are followed. Individual members
may not use the RISC-V trademark for commercial purposes (..)”
So they will probably not remove it.
In RVVM – The RISC-V Virtual MachineInstruction interpreter is nicely human-readable: https://github.com/LekKit/RVVM/blob/staging/src/cpu/riscv_i....
In RVVM – The RISC-V Virtual MachineRVVM – The RISC-V Virtual Machine
140 points · Open discussion