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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 67 Servers

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SenderMessageTime
19 May 2025
@rosscomputerguy:matrix.orgTristan Ross1,693 derivations built now.02:29:05
@rosscomputerguy:matrix.orgTristan Ross216 hours02:31:04
@rosscomputerguy:matrix.orgTristan RossAverages 7.8 derivations an hour02:31:33
@rosscomputerguy:matrix.orgTristan RossIt is built05:49:23
@hsngrmpf:matrix.orgDavHauWas this native vor with emulation?06:43:50
@oak:universumi.fioak changed their display name from oak 🫱⭕🫲 to oak.10:58:24
@oak:universumi.fioak changed their display name from oak to oak 🏳️‍🌈♥️.11:00:33
@rosscomputerguy:matrix.orgTristan RossNative, I can't do emulation13:44:07
@rosscomputerguy:matrix.orgTristan RossEmulation doesn't quite work with a 64k page size on Ampere13:44:18
@rosscomputerguy:matrix.orgTristan RossCross compiling though took 40 minutes on Ampere13:44:30
@rosscomputerguy:matrix.orgTristan RossNative building took like 9 hours and 30 minutes13:44:43
@rosscomputerguy:matrix.orgTristan Ross* Native building took like 9 days and 3 hours21:32:37
13 Aug 2025
@roedimqf:ruhr-uni-bochum.deMichael left the room.08:04:02
20 May 2025
@hsngrmpf:matrix.orgDavHauI'm cross compiling my starfive as well. 9 days sounds crazy. Is this due to slow flash IO, or is the CPU the limiting factor?03:22:39
@alex:tunstall.xyzAlexIIRC it's mostly CPU-limited.03:34:10
@hsngrmpf:matrix.orgDavHauWow, this sounds unreal? Is it just that compilers etc. are not optimized to run on riscv?03:53:33
@dramforever:matrix.orgdramforeverthe visionfive 2 is just not a great cpu05:13:48
@dramforever:matrix.orgdramforeveri mean the jh7110 on it05:14:35
@dramforever:matrix.orgdramforeverthey had to rush the release to be before the th1520, otherwise they couldn't even have the claim to be the fastest riscv sbc at release05:15:21
@lotte:chir.rs@lotte:chir.rsio speed is quite good05:22:53
@lotte:chir.rs@lotte:chir.rsespecially if you have an nvme ssd05:23:04
@dramforever:matrix.orgdramforeverit's not great for an nvme, not even great for pcie2.0x1 but it's much better than any sd card05:24:17
@dramforever:matrix.orgdramforeverget a cheap 16G optane05:24:31
@lotte:chir.rs@lotte:chir.rsi slapped my old laptop ssd in there05:25:15
@lotte:chir.rs@lotte:chir.rs(compared to similar devices)05:25:38
@lotte:chir.rs@lotte:chir.rsmy laptop had an early m.2 nvme ssd05:26:24
@dramforever:matrix.orgdramforeverthe pcie is all in all pretty good05:26:30
@lotte:chir.rs@lotte:chir.rs

^C153+0 records in
153+0 records out
10267656192 bytes (10 GB, 9.6 GiB) copied, 130.16 s, 78.9 MB/s

dd if=/dev/zero of=test.file bs=64M count=256 oflag=dsync on btrfs on that old ssd

05:27:19
@lotte:chir.rs@lotte:chir.rsbut yeah those claims were just Wrong05:28:49
@lotte:chir.rs@lotte:chir.rsi can barely get it to half speed to the rpi4 without overclocking05:29:05

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