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NixOS RISC-V

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NixOS on RISC-V https://wiki.nixos.org/wiki/RISC-V https://pad.lassul.us/NixOS-riscv64-linux https://github.com/orgs/NixOS/teams/risc-v70 Servers

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8 Jul 2025
@rosscomputerguy:matrix.orgTristan RossWith my stdenv hat on though, I want to see it become a tier 2 target rather than tier 3.19:27:34
@zimward:zimward.moezimwardconsidering the inertia riscv has and will probably sustain (see china and europes riscv effords) we should definetly aim to get it close to arm's support in the long term19:29:50
@rosscomputerguy:matrix.orgTristan RossYeah, as a user who daily drives arm, I do want it to become tier 1.19:30:54
@rosscomputerguy:matrix.orgTristan RossFun fact, the stdenv team added a new target triple question to the survey. We'll use this to better effectively handle supporting targets.19:34:05
@ra33it0:matrix.orgra33it0 joined the room.19:57:18
9 Jul 2025
@dramforever:matrix.orgdramforeverre: riscv i think we should probably wait for more reliable hardware00:58:29
@dramforever:matrix.orgdramforeverwhich should be soon-ish (as in within a year)00:58:48
@dramforever:matrix.orgdramforeverwithin this year probably if we get eswin eic770*00:59:32
@dramforever:matrix.orgdramforever
In reply to @zimward:zimward.moe
i was thinking about what it would take to setup a official builder to populate the cache with riscv packages together with rtunreal. so far we thought about either one or two milkv pioneer boards or a cluster of Systems on a module like the one from milkv or simmilar in a 1 or 2 U chassis. whats the general stance about setting up something like this? also im not sure what the impact of GhostWrite is on compiling (ie how bad it disableing vector is for the performance), any input is appreciated.
the impact on generic software is zero
01:00:04
@dramforever:matrix.orgdramforever gcc and llvm both support -march=+xtheadvector but ~nobody is using that 01:00:47
@dramforever:matrix.orgdramforeveri do wonder where SG2044 is at01:03:30
@dramforever:matrix.orgdramforeverit should be just SG2042 but better01:03:41
@rosscomputerguy:matrix.orgTristan Ross
In reply to @dramforever:matrix.org
re: riscv i think we should probably wait for more reliable hardware
I definitely don't disagree on this but like, I do want to see something heh.
01:09:20
@rosscomputerguy:matrix.orgTristan Ross
In reply to @dramforever:matrix.org
it should be just SG2042 but better
How does it compare to the P550?
01:09:46
@rosscomputerguy:matrix.orgTristan RossOh, it has P550 cores01:18:06
@dramforever:matrix.orgdramforeverSG2044 isn't P55001:32:50
@dramforever:matrix.orgdramforeverOt'01:32:52
@dramforever:matrix.orgdramforever* It's supposedly C920v201:32:59
@dramforever:matrix.orgdramforeverbut these names don't mean anything anymore01:33:06
@dramforever:matrix.orgdramforeverbasically SG2042 but better01:33:11
@dramforever:matrix.orgdramforeverwith ratified V01:33:15
@rosscomputerguy:matrix.orgTristan RossI was looking at this https://www.cnx-software.com/2024/06/19/eswin-eic7700x-quad-core-risc-v-soc-embeds-19-95-tops-npu-for-edge-ai-vision-applications/01:53:09
@dramforever:matrix.orgdramforeveroh, yes, eic7700x is p55003:13:08
@fgaz:matrix.orgfgazwe do have eic7700x boards though, i have one on my desk09:02:57
@dramforever:matrix.orgdramforeverto be honest, i'm not sure why i said "this year". i know milkv megrez very much exists now09:18:12
@dramforever:matrix.orgdramforever* to be honest, i'm not sure why i said "this year". i knew milkv megrez very much exists now09:18:17
@dramforever:matrix.orgdramforevermaybe i was thinking about the software situation09:18:27
@fgaz:matrix.orgfgazor eic770209:59:40
@fgaz:matrix.orgfgazthat one is still not out, is it?10:00:07
@zimward:zimward.moezimward
In reply to @dramforever:matrix.org
re: riscv i think we should probably wait for more reliable hardware
what do you mean with more reliable hardware? (i would assume that most current SBCs will run fine without crashing) the builders don't need good single core performance as long as we can get enough cores with the memory to support them in a small enough form factor to cram them in a 1 or 2U chassis.
10:04:33

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