| 15 Mar 2026 |
 dramforever | it does not mean we should turn on -march=rva23u64 while building | 01:14:01 |
 hexa | fair, whatever | 01:14:15 |
| hexa | I'm not insisting on that | 01:14:20 |
| dramforever | we can only do it with faster cpus | 01:14:34 |
| dramforever | if that's what you mean | 01:14:39 |
| hexa | yes | 01:14:43 |
| dramforever | i'm fine with that | 01:14:51 |
| hexa | I think we started bootstrapping aarch64-linux around some x-gene cpu from packet.net | 01:15:41 |
| hexa | not sure we had armv8 earlier than that | 01:15:53 |
| hexa | the community did provided an armv7 cache | 01:16:19 |
| hexa | * the community did provide an armv7 cache | 01:16:21 |
| dramforever | for reference, not the most representative benchmark, but from the people who had spacemit k3 ssh access, they got 15k on coremark with -march=rv64gc and 10k with v enabled | 01:17:20 |
| dramforever | yes coremark is more is better | 01:17:28 |
| dramforever | i think it's possible that "target rva23" becomes reasonable before nixos gets riscv64-linux in the upper tiers but it's not a reasonable target rn | 01:18:44 |
| hexa | nixos tests would be a big thing for baseline validation | 01:19:26 |
| hexa | maybe if the stars align we can get some tests onto nspawn | 01:20:48 |
| dramforever | yes, i think it is reasonable to say "we want fast chips with virtualization and X features and Y features for builders" | 01:21:04 |
| hexa | it was my impression that hardware virtualisation was not a consistent thing before the rv23a profile | 01:22:09 |
| hexa | * it was my impression that hardware virtualisation instructions were not consistenyl available before the rv23a profile | 01:22:33 |
| hexa | * it was my impression that hardware virtualisation instructions were not consistently available before the rv23a profile | 01:22:42 |
| dramforever | generally rva23 riscv machines are not available | 01:24:03 |
| dramforever | * | 01:24:11 |
| dramforever | they will be available starting late? april with spacemit k3 | 01:24:26 |
| dramforever | until then you only have rva23 machines if you're some insider | 01:25:32 |
| hexa | is the s pacemit k3 in any way interesting for us? | 01:28:14 |
| hexa | * is the spacemit k3 in any way interesting for us? | 01:28:18 |
| dramforever | it will have 8 cores (or 16 cores if you add hacks), virtualization, rva23, quite a bit of pcie | 01:29:38 |
| dramforever | * | 01:29:52 |
| hexa | we can always start playing with risc-v on staging-hydra btw | 01:35:42 |
| dramforever | oh also good effort and progress from spacemit and others sending drivers to mainline kernel, that's important. not there yet but they're hard at work at it - not a thing you see often for vendors | 01:36:06 |
