GKaszewski/k-os
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perf(kernel): kernel static all-zero -> .bss (image 812K -> 173K): domain::Slot (repr(u8) Empty=0) for tables, zero generation counters, core ids by position, pool/platform installed at boot; Option-backed Slot under kani (cbmc speed); build fails if .data > 16K

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This commit is contained in:
Gabriel Kaszewski
2026-10-28 13:01:52 +01:00
parent 419b715a1f
commit a2d4a7d085
24 changed files with 320 additions and 116 deletions
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12
crates/domain/src/endpoint/mod.rs
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@@ -93,14 +93,14 @@ impl Endpoint {
pub const MAX_ENDPOINTS: usize = if cfg!(kani) { 2 } else { 256 };
pub struct EndpointTable {
endpoints: [Option<Endpoint>; MAX_ENDPOINTS],
endpoints: [crate::slot::Slot<Endpoint>; MAX_ENDPOINTS],
generations: SlotGenerations<MAX_ENDPOINTS>,
}
impl EndpointTable {
pub const fn new() -> Self {
Self {
endpoints: [const { None }; MAX_ENDPOINTS],
endpoints: [const { crate::slot::Slot::Empty }; MAX_ENDPOINTS],
generations: SlotGenerations::new(),
}
}
@@ -111,9 +111,9 @@ impl EndpointTable {
.endpoints
.iter_mut()
.enumerate()
.find(|(i, s)| s.is_none() && generations.is_usable(*i))?;
.find(|(i, s)| !s.is_full() && generations.is_usable(*i))?;
let id = EndpointId::from_raw(idx as u16);
*slot = Some(Endpoint::new(id, owner));
slot.set(Endpoint::new(id, owner));
Some(id)
}
@@ -124,13 +124,13 @@ impl EndpointTable {
}
pub fn iter(&self) -> impl Iterator<Item = &Endpoint> {
self.endpoints.iter().flatten()
self.endpoints.iter().filter_map(crate::slot::Slot::as_ref)
}
pub fn ids_owned_by(&self, owner: ProcessId) -> impl Iterator<Item = EndpointId> + '_ {
self.endpoints
.iter()
.flatten()
.filter_map(crate::slot::Slot::as_ref)
.filter(move |ep| ep.owner == owner)
.map(|ep| ep.id)
}