Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

fix potential data race when report resource group metric #8235

Merged
merged 7 commits into from
Oct 25, 2023
Merged

fix potential data race when report resource group metric #8235

Changes from all commits
Commits
Show all changes
7 commits
Select commit Hold shift + click to select a range
46110ef
fix resource group metric data race
guo-shaoge Oct 23, 2023
c2b98cc
Merge branch 'master' of github.com:pingcap/tiflash into fix_data_race
guo-shaoge Oct 23, 2023
c40f5cb
Merge branch 'master' into fix_data_race
guo-shaoge Oct 25, 2023
6d40633
fix name
guo-shaoge Oct 25, 2023
b629922
Merge branch 'fix_data_race' of github.com:guo-shaoge/tiflash into fi…
guo-shaoge Oct 25, 2023
a7fd6fb
Merge branch 'master' of github.com:pingcap/tiflash into fix_data_race
guo-shaoge Oct 25, 2023
b9a26bd
Merge branch 'master' into fix_data_race
ti-chi-bot[bot] Oct 25, 2023
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
18 changes: 13 additions & 5 deletions dbms/src/Common/TiFlashMetrics.h
View file
Open in desktop
JaySon-Huang marked this conversation as resolved.
Show resolved Hide resolved
Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,7 @@

#include <ext/scope_guard.h>
#include <mutex>
#include <shared_mutex>

// to make GCC 11 happy
#include <cassert>
Expand Down Expand Up @@ -863,11 +864,17 @@ struct MetricFamily
T & get(size_t idx = 0) { return *(metrics[idx]); }
T & get(size_t idx, const String & resource_group_name)
{
if (metrics_map.find(resource_group_name) == metrics_map.end())
{
addMetricsForResourceGroup(resource_group_name);
std::shared_lock lock(resource_group_metrics_mu);
if (resource_group_metrics_map.find(resource_group_name) != resource_group_metrics_map.end())
return *(resource_group_metrics_map[resource_group_name][idx]);
}
return *(metrics_map[resource_group_name][idx]);

std::lock_guard lock(resource_group_metrics_mu);
if (resource_group_metrics_map.find(resource_group_name) == resource_group_metrics_map.end())
addMetricsForResourceGroup(resource_group_name);

return *(resource_group_metrics_map[resource_group_name][idx]);
}

private:
Expand All @@ -886,14 +893,15 @@ struct MetricFamily
auto & metric = MetricTrait::add(*store_family, resource_group_name, MetricArgType{});
metrics_temp.emplace_back(&metric);
}
metrics_map[resource_group_name] = metrics_temp;
resource_group_metrics_map[resource_group_name] = metrics_temp;
}

std::vector<T *> metrics;
prometheus::Family<T> * store_family;
std::vector<MetricArgType> store_args;
// <resource_group_name, metrics>
std::unordered_map<String, std::vector<T *>> metrics_map;
std::shared_mutex resource_group_metrics_mu;
std::unordered_map<String, std::vector<T *>> resource_group_metrics_map;
};

/// Centralized registry of TiFlash metrics.
Expand Down