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Lix

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Lix user channel. Feel free to discuss on-topic issues here and give each other help. For matrix.to links to the rest of the Lix channels, see: https://wiki.lix.systems/books/lix-organisation/page/matrix-rooms304 Servers

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21 Jan 2026
@raitobezarius:matrix.orgraitobezariusI think looking at docs on Android zygote might be the more efficient way to learn about the problem space21:01:46
@piegames:flausch.socialpiegames
In reply to @raitobezarius:matrix.org
The wiki may talk about it around the concept of "zygote"
No search results for that keyword
22:21:21
@raitobezarius:matrix.orgraitobezariushttps://source.android.com/docs/core/runtime/zygote22:41:52
@raitobezarius:matrix.orgraitobezariusi figured out another piece of docs to explain the problem than the obscure piece of docs of zygote of Android23:51:28
@raitobezarius:matrix.orgraitobezarius https://unikraft.org/blog/2025-05-15-multiprocess#posix-and-the-challenges-of-multiprocess 23:51:29
@raitobezarius:matrix.orgraitobezariusanother plan we have to solve this is to be able to use vfork23:51:40
@raitobezarius:matrix.orgraitobezarius (the path is being slowly opened by the recent chains on reworking libexec helpers in https://gerrit.lix.systems/c/lix/+/4994) 23:51:56
@raitobezarius:matrix.orgraitobezariusthe important piece is23:52:42
@raitobezarius:matrix.orgraitobezarius

given that before COW fork() was too slow as the kernel had to copy the parent's context.

23:52:44
22 Jan 2026
@antifuchs:asf.computerantifuchsAh, the classic fork-copies-everything issue, eh. Thanks for linking that!01:00:45
@commentator2.0:elia.gardenRutile (rootile) https://lix.dev/blog/introducing-lix/
Ohno
08:29:06
@hexa:lossy.networkhexahttps://youtu.be/t6-cCh9bTG4?si=eH4hZE-9YZaGuCO-&t=1408:40:43
@mickeymarse:4d2.orgm
In reply to @commentator2.0:elia.garden
https://lix.dev/blog/introducing-lix/
Ohno
#molotov
15:21:38
@acidbong:envs.netAcid Bong
In reply to @commentator2.0:elia.garden
https://lix.dev/blog/introducing-lix/
Ohno
i guess Lix isn't registered yet
16:09:43
@acidbong:envs.netAcid Bong(the bane)16:09:52
@acidbong:envs.netAcid Bong*name16:09:58
@lotte:chir.rsLotte (it/its)/Cinny (she/her) θΔ& changed their profile picture.16:47:31
@antifuchs:asf.computerantifuchspretty sure there are witches working on the lix project that could arrange for a bane17:13:09
@cyclopentane:aidoskyneen.eupentane changed their profile picture.22:21:03
23 Jan 2026
@io:meat.computer@io:meat.computer left the room.00:52:51
@niko:nrab.lolniko ⚡️ Does Lix expose any probes for profiling, especially when it comes to eval? 11:51:38
@piegames:flausch.socialpiegamesWhat do you mean with probes? If you want to profile your Nix code then it has performance counters you can print with some flags (IIRC), when it comes to profiling eval itself then perf and callgrind it is12:44:10
@thubrecht:matrix.orgthubrecht NIX_SHOW_STATS=1 is the env variable that makes it print the counters 12:54:39
@nea:nea.moenea joined the room.13:05:52
@raitobezarius:matrix.orgraitobezariuswe have USDT probes for HTTP transfers15:24:01
@raitobezarius:matrix.orgraitobezariusi want to introduce more probes, like, significantly more15:24:09
@raitobezarius:matrix.orgraitobezariusso that it's possible to write an eBPF profiler based on them for eval15:24:18
@raitobezarius:matrix.orgraitobezariusbut didn't have time15:24:26
@niko:nrab.lolniko ⚡️
In reply to @piegames:flausch.social
What do you mean with probes? If you want to profile your Nix code then it has performance counters you can print with some flags (IIRC), when it comes to profiling eval itself then perf and callgrind it is
I mean not profiling the eval implementation itself but profiling nix code against the current eval implementation. But those answer my question, thank you, I’ll see if the counters are sufficient for what I want to look into. Worst case I’ll just wait with anticipation for raito to get back to introducing more probes
15:54:23
@raitobezarius:matrix.orgraitobezariusthere's a function tracer as well fyi16:38:47

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