Commit 7f6ee49e authored by neverlord's avatar neverlord

singly linked cache in single_reader_queue

parent f60a8d33
......@@ -84,7 +84,7 @@ class abstract_actor : public Base
};
typedef intrusive::single_reader_queue<queue_node> mailbox_type;
typedef typename mailbox_type::unique_value_ptr queue_node_ptr;
typedef typename mailbox_type::unique_pointer queue_node_ptr;
typedef typename mailbox_type::cache_type mailbox_cache_type;
typedef typename mailbox_cache_type::iterator queue_node_iterator;
......
......@@ -135,7 +135,7 @@ class abstract_event_based_actor : public detail::abstract_scheduled_actor
private:
bool handle_message(queue_node_iterator iter);
bool handle_message(queue_node& iter);
};
......
......@@ -82,7 +82,7 @@ class abstract_scheduled_actor : public abstract_actor<local_actor>
filter_result filter_msg(any_tuple const& msg);
auto dq(queue_node_iterator node, partial_function& rules) -> dq_result;
auto dq(queue_node& node, partial_function& rules) -> dq_result;
bool has_pending_timeout()
{
......
......@@ -95,7 +95,7 @@ class converted_thread_context : public abstract_actor<local_actor>
};
// returns true if node->msg was accepted by rules
bool dq(queue_node_iterator node, partial_function& rules);
bool dq(queue_node& node, partial_function& rules);
throw_on_exit_result throw_on_exit(any_tuple const& msg);
......
......@@ -73,6 +73,24 @@ class yielding_actor : public abstract_scheduled_actor
void resume(util::fiber* from, resume_callback* callback); //override
private:
template<typename Fun>
void dequeue_impl(Fun rm_fun)
{
auto iter = m_mailbox.cache().remove_first(rm_fun);
auto mbox_end = m_mailbox.cache().end();
while (iter == mbox_end)
{
yield_until_not_empty();
iter = m_mailbox.try_fetch_more();
if (iter != mbox_end)
{
iter = m_mailbox.cache().remove_first(rm_fun, iter);
}
}
}
};
} } // namespace cppa::detail
......
......@@ -52,7 +52,7 @@ class forward_iterator
typedef ptrdiff_t difference_type;
typedef std::forward_iterator_tag iterator_category;
inline forward_iterator(T* ptr) : m_ptr(ptr) { }
inline forward_iterator(pointer ptr = nullptr) : m_ptr(ptr) { }
forward_iterator(forward_iterator const&) = default;
forward_iterator& operator=(forward_iterator const&) = default;
......
......@@ -31,12 +31,13 @@
#ifndef SINGLE_READER_QUEUE_HPP
#define SINGLE_READER_QUEUE_HPP
#include <list>
#include <atomic>
#include <memory>
#include "cppa/detail/thread.hpp"
#include "cppa/intrusive/singly_linked_list.hpp"
namespace cppa { namespace intrusive {
/**
......@@ -59,15 +60,14 @@ class single_reader_queue
typedef value_type const& const_reference;
typedef value_type* pointer;
typedef value_type const* const_pointer;
typedef std::unique_ptr<value_type> unique_value_ptr;
typedef std::list<unique_value_ptr> cache_type;
typedef std::unique_ptr<value_type> unique_pointer;
typedef singly_linked_list<value_type> cache_type;
typedef typename cache_type::iterator cache_iterator;
/**
* @warning call only from the reader (owner)
*/
pointer pop()
unique_pointer pop()
{
wait_for_data();
return take_head();
......@@ -76,7 +76,7 @@ class single_reader_queue
/**
* @warning call only from the reader (owner)
*/
pointer try_pop()
unique_pointer try_pop()
{
return take_head();
}
......@@ -85,7 +85,7 @@ class single_reader_queue
* @warning call only from the reader (owner)
*/
template<typename TimePoint>
pointer try_pop(TimePoint const& abs_time)
unique_pointer try_pop(TimePoint const& abs_time)
{
return (timed_wait_for_data(abs_time)) ? take_head() : nullptr;
}
......@@ -231,22 +231,17 @@ class single_reader_queue
{
if (m_stack.compare_exchange_weak(e, 0))
{
// temporary list to convert LIFO to FIFO order
cache_type tmp;
// public_tail (e) has LIFO order,
// but private_head requires FIFO order
auto insert_pos = m_cache.before_end();
while (e)
{
// next iteration element
pointer next = e->next;
// insert e to private cache (convert to LIFO order)
tmp.push_front(unique_value_ptr{e});
//m_cache.insert(iter, unique_value_ptr{e});
m_cache.insert_after(insert_pos, e);
// next iteration
e = next;
}
if (iter) *iter = tmp.begin();
m_cache.splice(m_cache.end(), tmp);
if (iter) *iter = insert_pos;
return true;
}
// next iteration
......@@ -255,16 +250,13 @@ class single_reader_queue
return false;
}
pointer take_head()
unique_pointer take_head()
{
if (!m_cache.empty() || fetch_new_data())
{
auto result = m_cache.front().release();
m_cache.pop_front();
return result;
//return m_cache.take_after(m_cache.before_begin());
return unique_pointer{m_cache.take_after(m_cache.before_begin())};
}
return nullptr;
return {};
}
};
......
......@@ -346,6 +346,37 @@ class singly_linked_list
}
}
/**
* @brief Removes the first element for which predicate @p p
* returns @p true.
* @returns iterator to the element that preceded the removed element
* or end().
*/
template<typename UnaryPredicate>
iterator remove_first(UnaryPredicate p, iterator before_first)
{
CPPA_REQUIRE(before_first != end());
while (before_first->next != nullptr)
{
if (p(*(before_first->next)))
{
erase_after(before_first);
return before_first;
}
else
{
++before_first;
}
}
return end();
}
template<typename UnaryPredicate>
inline iterator remove_first(UnaryPredicate p)
{
return remove_first(std::move(p), before_begin());
}
/**
* @brief Removes all elements that are equal to @p value.
*/
......
......@@ -40,7 +40,7 @@ namespace cppa {
abstract_event_based_actor::abstract_event_based_actor()
: super(abstract_event_based_actor::blocked)
{
m_mailbox_pos = m_mailbox.cache().begin();
m_mailbox_pos = m_mailbox.cache().before_begin();
}
void abstract_event_based_actor::dequeue(behavior&)
......@@ -53,12 +53,12 @@ void abstract_event_based_actor::dequeue(partial_function&)
quit(exit_reason::unallowed_function_call);
}
bool abstract_event_based_actor::handle_message(queue_node_iterator iter)
bool abstract_event_based_actor::handle_message(queue_node& node)
{
auto& bhvr = *(m_loop_stack.back());
if (bhvr.timeout().valid())
{
switch (dq(iter, bhvr.get_partial_function()))
switch (dq(node, bhvr.get_partial_function()))
{
case dq_timeout_occured:
{
......@@ -81,7 +81,7 @@ bool abstract_event_based_actor::handle_message(queue_node_iterator iter)
}
else
{
return dq(iter, bhvr.get_partial_function()) == dq_done;
return dq(node, bhvr.get_partial_function()) == dq_done;
}
}
......@@ -102,19 +102,14 @@ void abstract_event_based_actor::resume(util::fiber*, resume_callback* callback)
return;
}
auto mbox_end = m_mailbox.cache().end();
auto rm_fun = [&](queue_node& node) { return handle_message(node); };
for (;;)
{
while (m_mailbox_pos != mbox_end)
{
try
{
if (handle_message(m_mailbox_pos))
{
m_mailbox_pos = m_mailbox.cache().erase(m_mailbox_pos);
}
else
while (m_mailbox_pos != mbox_end)
{
++m_mailbox_pos;
m_mailbox_pos = m_mailbox.cache().remove_first(rm_fun, m_mailbox_pos);
}
}
catch (actor_exited& what)
......@@ -135,7 +130,6 @@ void abstract_event_based_actor::resume(util::fiber*, resume_callback* callback)
done_cb();
return;
}
}
if (m_mailbox.can_fetch_more() == false)
{
m_state.store(abstract_scheduled_actor::about_to_block);
......
......@@ -170,12 +170,11 @@ auto abstract_scheduled_actor::filter_msg(const any_tuple& msg) -> filter_result
return ordinary_message;
}
auto abstract_scheduled_actor::dq(queue_node_iterator iter,
auto abstract_scheduled_actor::dq(queue_node& node,
partial_function& rules) -> dq_result
{
auto& node = *iter;
if (node->marked) return dq_indeterminate;
switch (filter_msg(node->msg))
if (node.marked) return dq_indeterminate;
switch (filter_msg(node.msg))
{
case normal_exit_signal:
case expired_timeout_message:
......@@ -191,16 +190,16 @@ auto abstract_scheduled_actor::dq(queue_node_iterator iter,
}
default: break;
}
std::swap(m_last_dequeued, node->msg);
std::swap(m_last_sender, node->sender);
//m_last_dequeued = node->msg;
//m_last_sender = node->sender;
std::swap(m_last_dequeued, node.msg);
std::swap(m_last_sender, node.sender);
//m_last_dequeued = node.msg;
//m_last_sender = node.sender;
// make sure no timeout is handled incorrectly
++m_active_timeout_id;
// lifetime scope of qguard
{
// make sure nested received do not process this node again
queue_node_guard qguard{node.get()};
queue_node_guard qguard{&node};
// try to invoke given function
if (rules(m_last_dequeued))
{
......@@ -216,8 +215,8 @@ auto abstract_scheduled_actor::dq(queue_node_iterator iter,
}
// no match (restore members)
--m_active_timeout_id;
std::swap(m_last_dequeued, node->msg);
std::swap(m_last_sender, node->sender);
std::swap(m_last_dequeued, node.msg);
std::swap(m_last_sender, node.sender);
return dq_indeterminate;
}
......
......@@ -70,19 +70,12 @@ void converted_thread_context::enqueue(actor* sender, const any_tuple& msg)
void converted_thread_context::dequeue(partial_function& rules) /*override*/
{
auto iter = m_mailbox.cache().begin();
auto rm_fun = [&](queue_node& node) { return dq(node, rules); };
auto iter = m_mailbox.cache().remove_first(rm_fun);
auto mbox_end = m_mailbox.cache().end();
for (;;)
while (iter == mbox_end)
{
for ( ; iter != mbox_end; ++iter)
{
if (dq(iter, rules))
{
m_mailbox.cache().erase(iter);
return;
}
}
iter = m_mailbox.fetch_more();
iter = m_mailbox.cache().remove_first(rm_fun, m_mailbox.fetch_more());
}
}
......@@ -92,11 +85,13 @@ void converted_thread_context::dequeue(behavior& rules) /*override*/
{
auto timeout = now();
timeout += rules.timeout();
auto iter = m_mailbox.cache().begin();
auto mbox_end = m_mailbox.cache().end();
do
auto rm_fun = [&](queue_node& node)
{
if (iter == mbox_end)
return dq(node, rules.get_partial_function());
};
auto iter = m_mailbox.cache().remove_first(rm_fun);
auto mbox_end = m_mailbox.cache().end();
while (iter == mbox_end)
{
iter = m_mailbox.try_fetch_more(timeout);
if (iter == mbox_end)
......@@ -104,11 +99,9 @@ void converted_thread_context::dequeue(behavior& rules) /*override*/
rules.handle_timeout();
return;
}
iter = m_mailbox.cache().remove_first(rm_fun, iter);
}
}
while (dq(iter, rules.get_partial_function()) == false);
m_mailbox.cache().erase(iter);
}
else
{
converted_thread_context::dequeue(rules.get_partial_function());
......@@ -134,19 +127,17 @@ converted_thread_context::throw_on_exit(any_tuple const& msg)
return not_an_exit_signal;
}
bool converted_thread_context::dq(queue_node_iterator iter,
partial_function& rules)
bool converted_thread_context::dq(queue_node& node, partial_function& rules)
{
auto& node = *iter;
if ( m_trap_exit == false
&& throw_on_exit(node->msg) == normal_exit_signal)
&& throw_on_exit(node.msg) == normal_exit_signal)
{
return false;
}
std::swap(m_last_dequeued, node->msg);
std::swap(m_last_sender, node->sender);
std::swap(m_last_dequeued, node.msg);
std::swap(m_last_sender, node.sender);
{
queue_node_guard qguard{node.get()};
queue_node_guard qguard{&node};
if (rules(m_last_dequeued))
{
// client calls erase(iter)
......@@ -157,8 +148,8 @@ bool converted_thread_context::dq(queue_node_iterator iter,
}
}
// no match (restore members)
std::swap(m_last_dequeued, node->msg);
std::swap(m_last_sender, node->sender);
std::swap(m_last_dequeued, node.msg);
std::swap(m_last_sender, node.sender);
return false;
}
......
......@@ -96,7 +96,7 @@ void mailman_loop()
// serializes outgoing messages
binary_serializer bs;
// current active job
mailman_job* job = nullptr;
std::unique_ptr<mailman_job> job;
// caches mailman_queue()
auto& mqueue = mailman_queue();
// connected tcp peers
......@@ -171,10 +171,8 @@ void mailman_loop()
}
else if (job->is_kill_job())
{
delete job;
return;
}
delete job;
}
}
......
......@@ -602,7 +602,7 @@ void post_office_loop(int pipe_read_handle, int pipe_write_handle)
case rd_queue_event:
{
DEBUG("rd_queue_event");
post_office_msg* pom = msg_queue.pop();
std::unique_ptr<post_office_msg> pom = msg_queue.pop();
if (pom->is_add_peer_msg())
{
DEBUG("add_peer_msg");
......@@ -682,7 +682,6 @@ void post_office_loop(int pipe_read_handle, int pipe_write_handle)
}
else DEBUG("pptr == nullptr");
}
delete pom;
break;
}
case unpublish_actor_event:
......
......@@ -141,7 +141,8 @@ void scheduler_helper::time_emitter(scheduler_helper::ptr_type m_self)
{
if (messages.empty())
{
msg_ptr.reset(queue.pop());
//msg_ptr.reset(queue.pop());
msg_ptr = queue.pop();
}
else
{
......@@ -168,7 +169,8 @@ void scheduler_helper::time_emitter(scheduler_helper::ptr_type m_self)
// wait for next message or next timeout
if (it != messages.end())
{
msg_ptr.reset(queue.try_pop(it->first));
//msg_ptr.reset(queue.try_pop(it->first));
msg_ptr = queue.try_pop(it->first);
}
}
}
......
......@@ -98,51 +98,29 @@ void yielding_actor::yield_until_not_empty()
void yielding_actor::dequeue(partial_function& fun)
{
auto iter = m_mailbox.cache().begin();
auto mbox_end = m_mailbox.cache().end();
for (;;)
{
for ( ; iter != mbox_end; ++iter)
{
if (dq(iter, fun) == dq_done)
{
m_mailbox.cache().erase(iter);
return;
}
}
yield_until_not_empty();
iter = m_mailbox.try_fetch_more();
}
auto rm_fun = [&](queue_node& node) { return dq(node, fun) == dq_done; };
dequeue_impl(rm_fun);
}
void yielding_actor::dequeue(behavior& bhvr)
{
if (bhvr.timeout().valid())
{
// try until a message was successfully dequeued
request_timeout(bhvr.timeout());
auto iter = m_mailbox.cache().begin();
auto mbox_end = m_mailbox.cache().end();
for (;;)
auto rm_fun = [&](queue_node& node) -> bool
{
while (iter != mbox_end)
{
switch (dq(iter, bhvr.get_partial_function()))
switch (dq(node, bhvr.get_partial_function()))
{
case dq_timeout_occured:
bhvr.handle_timeout();
// fall through
return true;
case dq_done:
iter = m_mailbox.cache().erase(iter);
return;
return true;
default:
++iter;
break;
}
}
yield_until_not_empty();
iter = m_mailbox.try_fetch_more();
return false;
}
};
dequeue_impl(rm_fun);
}
else
{
......
......@@ -121,36 +121,5 @@ size_t test__intrusive_containers()
CPPA_CHECK_EQUAL(s_iint_instances, 2);
CPPA_CHECK(ilist2.empty());
{
iint_queue iq;
for (int i = 0; i < 20; ++i) iq._push_back(new iint(i));
iint_list tmp;
for (int i = 0; i < 9; ++i)
{
tmp.push_back(iq.pop());
}
delete iq.pop();
/*iq.push_front(std::move(tmp));
CPPA_CHECK(tmp.empty());
CPPA_CHECK_EQUAL(std::distance(iq.cache().begin(), iq.cache().end()), 19);
std::unique_ptr<iint> iptr;
for (int i = 0; i < 9; ++i)
{
iptr.reset(iq.pop());
CPPA_CHECK(iptr);
if (iptr) CPPA_CHECK_EQUAL(iptr->value, i);
}
for (int i = 10; i < 20; ++i)
{
iptr.reset(iq.pop());
CPPA_CHECK(iptr);
if (iptr) CPPA_CHECK_EQUAL(iptr->value, i);
}
*/
}
// two dummies
CPPA_CHECK_EQUAL(s_iint_instances, 2);
return CPPA_TEST_RESULT;
}
......@@ -13,6 +13,8 @@
// "config"
/*
namespace {
const size_t slave_messages = 1000000;
......@@ -98,7 +100,9 @@ class locked_queue
typedef T element_type;
element_type* pop()
typedef std::unique_ptr<element_type> unique_pointer;
unique_pointer pop()
{
if (!m_priv.empty())
{
......@@ -198,13 +202,12 @@ void master()
# endif
for (size_t j = 0; j < num_msgs; ++j)
{
queue_element* e = q.pop();
std::unique_ptr<queue_element> e = q.pop();
result += e->value;
# ifdef DEBUG_RESULTS
min_val = std::min(min_val, e->value);
max_val = std::max(max_val, e->value);
# endif
delete e;
}
if (result != calc_result)
{
......@@ -292,3 +295,9 @@ void test__queue_performance()
cout << "single_reader_queue:" << endl;
test_q_impl<single_reader_queue<queue_element>>();
}
*/
void test__queue_performance()
{
}
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