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Avoid repetitive locking for clearing cache

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Zhang Junyang 2025-03-20 20:22:48 +08:00 committed by Tate, Hongliang Tian
parent e5be154ca8
commit 83b9ebf87d
2 changed files with 27 additions and 20 deletions
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18
osdk/deps/frame-allocator/src/cache.rs
View File

@ -71,13 +71,17 @@ impl<const NR_CONT_FRAMES: usize, const COUNT: usize> CacheArray<NR_CONT_FRAMES,
/// deallocate to the global pool.
fn dealloc(&mut self, guard: &DisabledLocalIrqGuard, addr: Paddr) {
if self.push_front(addr).is_none() {
super::pools::dealloc(guard, addr, Self::segment_size());
let nr_to_dealloc = COUNT * 2 / 3;
let nr_to_dealloc = COUNT * 2 / 3 + 1;
for _ in 0..nr_to_dealloc {
let frame = self.pop_front().unwrap();
super::pools::dealloc(guard, frame, Self::segment_size());
let segments = (0..nr_to_dealloc).map(|i| {
if i == 0 {
(addr, Self::segment_size())
} else {
(self.pop_front().unwrap(), Self::segment_size())
}
});
super::pools::dealloc(guard, segments);
};
}
@ -134,7 +138,7 @@ pub(super) fn alloc(guard: &DisabledLocalIrqGuard, layout: Layout) -> Option<Pad
pub(super) fn dealloc(guard: &DisabledLocalIrqGuard, addr: Paddr, size: usize) {
let nr_frames = size / PAGE_SIZE;
if nr_frames > 4 {
super::pools::dealloc(guard, addr, size);
super::pools::dealloc(guard, [(addr, size)].into_iter());
return;
}
@ -146,6 +150,6 @@ pub(super) fn dealloc(guard: &DisabledLocalIrqGuard, addr: Paddr, size: usize) {
2 => cache.cache2.dealloc(guard, addr),
3 => cache.cache3.dealloc(guard, addr),
4 => cache.cache4.dealloc(guard, addr),
_ => super::pools::dealloc(guard, addr, size),
_ => super::pools::dealloc(guard, [(addr, size)].into_iter()),
}
}

15
osdk/deps/frame-allocator/src/pools/mod.rs
View File

@ -82,8 +82,7 @@ pub(super) fn alloc(guard: &DisabledLocalIrqGuard, layout: Layout) -> Option<Pad
do_dealloc(
&mut local_pool,
&mut global_pool,
chunk_addr + layout.size(),
allocated_size - layout.size(),
[(chunk_addr + layout.size(), allocated_size - layout.size())].into_iter(),
);
}
}
@ -95,12 +94,15 @@ pub(super) fn alloc(guard: &DisabledLocalIrqGuard, layout: Layout) -> Option<Pad
chunk_addr
}
pub(super) fn dealloc(guard: &DisabledLocalIrqGuard, addr: Paddr, size: usize) {
pub(super) fn dealloc(
guard: &DisabledLocalIrqGuard,
segments: impl Iterator<Item = (Paddr, usize)>,
) {
let local_pool_cell = LOCAL_POOL.get_with(guard);
let mut local_pool = local_pool_cell.borrow_mut();
let mut global_pool = OnDemandGlobalLock::new();
do_dealloc(&mut local_pool, &mut global_pool, addr, size);
do_dealloc(&mut local_pool, &mut global_pool, segments);
balancing::balance(local_pool.deref_mut(), &mut global_pool);
@ -120,9 +122,9 @@ pub(super) fn add_free_memory(_guard: &DisabledLocalIrqGuard, addr: Paddr, size:
fn do_dealloc(
local_pool: &mut BuddySet<MAX_LOCAL_BUDDY_ORDER>,
global_pool: &mut OnDemandGlobalLock,
addr: Paddr,
size: usize,
segments: impl Iterator<Item = (Paddr, usize)>,
) {
segments.for_each(|(addr, size)| {
split_to_chunks(addr, size).for_each(|(addr, order)| {
if order >= MAX_LOCAL_BUDDY_ORDER {
global_pool.get().insert_chunk(addr, order);
@ -130,6 +132,7 @@ fn do_dealloc(
local_pool.insert_chunk(addr, order);
}
});
});
}
type GlobalLockGuard = SpinLockGuard<'static, BuddySet<MAX_BUDDY_ORDER>, LocalIrqDisabled>;