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Periodic rep crawler weights update (#2319)

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* Periodic rep crawler weights update

Also update probable rep with response only if channel was changed

* Fix MSVC build
This commit is contained in:
Sergey Kroshnin 2019-09-29 19:04:09 +03:00 • committed by Guilherme Lawless
commit f93fb30233
2 changed files with 38 additions and 15 deletions
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50
nano/node/repcrawler.cpp
View file

@ -37,6 +37,7 @@ void nano::rep_crawler::ongoing_crawl ()
auto now (std::chrono::steady_clock::now ());
auto total_weight_l (total_weight ());
cleanup_reps ();
update_weights ();
query (get_crawl_targets (total_weight_l));
auto sufficient_weight (total_weight_l > node.config.online_weight_minimum.number ());
// If online weight drops below minimum, reach out to preconfigured peers
@ -117,28 +118,30 @@ void nano::rep_crawler::query (std::shared_ptr<nano::transport::channel> channel
bool nano::rep_crawler::response (std::shared_ptr<nano::transport::channel> channel_a, nano::account const & rep_account_a, nano::amount const & weight_a)
{
auto updated (false);
auto updated_or_inserted (false);
nano::lock_guard<std::mutex> lock (probable_reps_mutex);
auto existing (probable_reps.find (rep_account_a));
if (existing != probable_reps.end ())
{
probable_reps.modify (existing, [weight_a, &updated, rep_account_a, channel_a](nano::representative & info) {
probable_reps.modify (existing, [weight_a, &updated_or_inserted, rep_account_a, channel_a](nano::representative & info) {
info.last_response = std::chrono::steady_clock::now ();
if (info.weight < weight_a)
// Update if representative channel was changed
if (info.channel->get_endpoint () != channel_a->get_endpoint ())
{
updated = true;
assert (info.account == rep_account_a);
updated_or_inserted = true;
info.weight = weight_a;
info.channel = channel_a;
info.account = rep_account_a;
}
});
}
else
{
probable_reps.insert (nano::representative (rep_account_a, weight_a, channel_a));
updated_or_inserted = true;
}
return updated;
return updated_or_inserted;
}
nano::uint128_t nano::rep_crawler::total_weight () const
@ -166,15 +169,8 @@ std::vector<nano::representative> nano::rep_crawler::representatives_by_weight (
nano::lock_guard<std::mutex> lock (probable_reps_mutex);
for (auto i (probable_reps.get<tag_weight> ().begin ()), n (probable_reps.get<tag_weight> ().end ()); i != n; ++i)
{
auto weight (i->weight.number ());
if (weight > 0)
{
result.push_back (*i);
}
else
{
break;
}
assert (i->weight.number () > 0);
result.push_back (*i);
}
return result;
}
@ -234,6 +230,30 @@ void nano::rep_crawler::cleanup_reps ()
}
}
void nano::rep_crawler::update_weights ()
{
nano::lock_guard<std::mutex> lock (probable_reps_mutex);
for (auto i (probable_reps.get<tag_last_request> ().begin ()), n (probable_reps.get<tag_last_request> ().end ()); i != n;)
{
auto weight (node.ledger.weight (i->account));
if (weight > 0)
{
if (i->weight.number () != weight)
{
probable_reps.get<tag_last_request> ().modify (i, [weight](nano::representative & info) {
info.weight = weight;
});
}
++i;
}
else
{
// Erase non representatives
i = probable_reps.get<tag_last_request> ().erase (i);
}
}
}
std::vector<nano::representative> nano::rep_crawler::representatives (size_t count_a)
{
std::vector<representative> result;

3
nano/node/repcrawler.hpp
View file

@ -133,6 +133,9 @@ private:
/** Clean representatives with inactive channels */
void cleanup_reps ();
/** Update representatives weights from ledger */
void update_weights ();
/** Protects the probable_reps container */
mutable std::mutex probable_reps_mutex;