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handle_dealloc_remote{,_slow}: use Remote's sizeclass information

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This removes a bunch of pointer math (which would need amplification) to find
and read the sizeclass from slab headers.
This commit is contained in:
Nathaniel Filardo
2020-12-14 18:38:52 +00:00
committed by Matthew Parkinson
parent 7c04a9dad6
commit bf742cef84
1 changed files with 5 additions and 11 deletions
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16
src/mem/alloc.h
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@@ -875,11 +875,9 @@ namespace snmalloc
#endif
if (likely(super->get_kind() == Super))
{
Slab* slab = Metaslab::get_slab(p);
Metaslab& meta = super->get_meta(slab);
if (likely(super->get_allocator() == public_state()))
{
small_dealloc_offseted(super, p, meta.sizeclass);
small_dealloc_offseted(super, p, p->sizeclass());
return;
}
}
@@ -891,27 +889,23 @@ namespace snmalloc
Superslab* super = Superslab::get(p);
if (likely(super->get_kind() == Medium))
{
Mediumslab* slab = Mediumslab::get(p);
if (likely(super->get_allocator() == public_state()))
{
sizeclass_t sizeclass = slab->get_sizeclass();
void* start = remove_cache_friendly_offset(p, sizeclass);
medium_dealloc(slab, start, sizeclass);
void* start = remove_cache_friendly_offset(p, p->sizeclass());
medium_dealloc(Mediumslab::get(p), start, p->sizeclass());
}
else
{
// Queue for remote dealloc elsewhere.
remote.dealloc(p->trunc_target_id(), p, slab->get_sizeclass());
remote.dealloc(p->trunc_target_id(), p, p->sizeclass());
}
}
else
{
SNMALLOC_ASSERT(likely(p->trunc_target_id() != get_trunc_id()));
SNMALLOC_ASSERT(likely(super->get_allocator() != public_state()));
Slab* slab = Metaslab::get_slab(p);
Metaslab& meta = super->get_meta(slab);
// Queue for remote dealloc elsewhere.
remote.dealloc(p->trunc_target_id(), p, meta.sizeclass);
remote.dealloc(p->trunc_target_id(), p, p->sizeclass());
}
}