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Simplify remote allocator.

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Don't store the sizeclass, as we can find it easily, and already are
going to touch though cache lines in the common case.
This commit is contained in:
Matthew Parkinson
2019-02-05 13:06:24 +00:00
parent 122a5de811
commit 83c55fe5da
2 changed files with 27 additions and 69 deletions
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34
src/mem/alloc.h
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@@ -536,8 +536,7 @@ namespace snmalloc
this->size += sizeclass_to_size(sizeclass);
Remote* r = (Remote*)p;
r->set_sizeclass_and_target_id(target_id, sizeclass);
assert(r->sizeclass() == sizeclass);
r->set_target_id(target_id);
assert(r->target_id() == target_id);
RemoteList* l = &list[get_slot(target_id, 0)];
@@ -702,21 +701,34 @@ namespace snmalloc
{
if (p != &stub)
{
uint8_t sizeclass = p->sizeclass();
Superslab* super = Superslab::get(p);
if (p->target_id() == id())
if (super->get_kind() == Super)
{
stats().remote_receive(sizeclass);
if (sizeclass < NUM_SMALL_CLASSES)
small_dealloc(Superslab::get(p), p, sizeclass);
Slab* slab = Slab::get(p);
Metaslab& meta = super->get_meta(slab);
if (p->target_id() == id())
{
small_dealloc(super, p, meta.sizeclass);
}
else
medium_dealloc(Mediumslab::get(p), p, sizeclass);
{
// Queue for remote dealloc elsewhere.
remote.dealloc(p->target_id(), p, meta.sizeclass);
}
}
else
{
// Queue for remote dealloc elsewhere.
remote.dealloc(p->target_id(), p, sizeclass);
Mediumslab* slab = Mediumslab::get(p);
if (p->target_id() == id())
{
medium_dealloc(slab, p, slab->get_sizeclass());
}
else
{
// Queue for remote dealloc elsewhere.
remote.dealloc(p->target_id(), p, slab->get_sizeclass());
}
}
}
}