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removed node recycling

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This commit is contained in:
joaquintides
2024-02-02 19:09:39 +01:00
parent 1e9970d150
commit 1c48ce8194
1 changed files with 22 additions and 19 deletions
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41
include/boost/unordered/detail/foa/concurrent_table.hpp
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@ -572,7 +572,7 @@ public:
}
std::cout
<<"version: 2024/02/03 11:30; "
<<"version: 2024/02/03 19:10; "
<<"lf: "<<(double)size()/capacity()<<"; "
<<"capacity: "<<capacity()<<"; "
<<"rehashes: "<<rehashes<<"; "
@ -2022,7 +2022,7 @@ private:
retired_element* retired_elements;
std::atomic<std::size_t> wpos=0;
std::atomic<std::size_t> rpos=0;
std::atomic<std::size_t> apos=0;
//std::atomic<std::size_t> apos=0;
std::atomic<ssize_t> size=0;
std::atomic<ssize_t> mcos=0;
};
@ -2074,13 +2074,14 @@ private:
std::size_t expected=retired_element::available_;
auto& e=v.retired_elements[wpos%v.garbage_vector::N];
if(e.epoch.compare_exchange_strong(expected,retired_element::reserved_)){
p=e.p.exchange(p);
if(p){
++nodes_wasted;
element_type x{p};
this->destroy_element(&x);
++v.apos;
}
e.p=p;
//p=e.p.exchange(p);
//if(p){
// ++nodes_wasted;
// element_type x{p};
// this->destroy_element(&x);
// ++v.apos;
//}
e.epoch=v.epoch.load();
if(++v.wpos%garbage_vector::min_for_garbage_collection==0){
garbage_collect(v,max_safe_epoch());
@ -2098,16 +2099,16 @@ private:
BOOST_FORCEINLINE value_type* new_element()
{
auto& v=local_garbage_vector();
for(;;){
std::size_t apos=v.apos;
if(apos>=v.rpos)break; /*`no available elements*/
auto pv=v.retired_elements[apos%v.garbage_vector::N].p.load();
if(v.apos.compare_exchange_weak(apos,apos+1)){
v.retired_elements[apos%v.garbage_vector::N].p=nullptr;
return pv;
}
}
//auto& v=local_garbage_vector();
//for(;;){
// std::size_t apos=v.apos;
// if(apos>=v.rpos)break; /*`no available elements*/
// auto pv=v.retired_elements[apos%v.garbage_vector::N].p.load();
// if(v.apos.compare_exchange_weak(apos,apos+1)){
// v.retired_elements[apos%v.garbage_vector::N].p=nullptr;
// return pv;
// }
//}
/* allocate */
return boost::allocator_allocate(this->al(),1);
@ -2158,6 +2159,8 @@ private:
for(;;){
auto& e=v.retired_elements[rpos%v.garbage_vector::N];
if(e.epoch>max_epoch)break;
element_type x{e.p};
this->destroy_element(&x);
e.epoch=retired_element::available_;
++rpos;
}