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[SDK] Avoid missing conditional variable update and simplify atomic bool #2553

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merged 15 commits into from
May 8, 2024
Merged

[SDK] Avoid missing conditional variable update and simplify atomic bool #2553

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2b357fb
Avoid missing conditional variable update and simplify atomic bool
arekay Feb 23, 2024
41443bf
Update sdk/src/metrics/export/periodic_exporting_metric_reader.cc
arekay Mar 5, 2024
d80f3e2
Merge branch 'main' into fix/reader_data_race
arekay Mar 5, 2024
549bc41
Update sdk/src/metrics/export/periodic_exporting_metric_reader.cc
arekay Mar 5, 2024
84a1463
Merge branch 'main' into fix/reader_data_race
esigo Mar 11, 2024
5475943
Merge branch 'main' into fix/reader_data_race
arekay Mar 15, 2024
b7b3675
Notify all waiting threads
arekay Mar 28, 2024
8111dff
Merge branch 'main' into fix/reader_data_race
arekay Mar 28, 2024
1c4b7f3
Merge branch 'main' into fix/reader_data_race
arekay Apr 1, 2024
950db86
Merge branch 'main' into fix/reader_data_race
arekay Apr 4, 2024
32e470d
Merge branch 'main' into fix/reader_data_race
arekay Apr 18, 2024
d7ab5af
Merge branch 'main' into fix/reader_data_race
marcalff Apr 29, 2024
f0d784f
Merge branch 'main' into fix/reader_data_race
arekay May 1, 2024
21b04f4
Update sdk/include/opentelemetry/sdk/metrics/metric_reader.h
marcalff May 8, 2024
808c3c4
Merge branch 'main' into fix/reader_data_race
marcalff May 8, 2024
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5 changes: 2 additions & 3 deletions sdk/include/opentelemetry/sdk/metrics/metric_reader.h
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Original file line number Diff line number Diff line change
Expand Up @@ -3,10 +3,10 @@

#pragma once

#include <atomic>
#include <chrono>
#include <memory>

#include "opentelemetry/common/spin_lock_mutex.h"
#include "opentelemetry/nostd/function_ref.h"
#include "opentelemetry/sdk/metrics/data/metric_data.h"
#include "opentelemetry/sdk/metrics/instruments.h"
Expand Down Expand Up @@ -72,8 +72,7 @@ class MetricReader
protected:
private:
MetricProducer *metric_producer_;
mutable opentelemetry::common::SpinLockMutex lock_;
bool shutdown_;
std::atomic<bool> shutdown_;
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};
} // namespace metrics
} // namespace sdk
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8 changes: 7 additions & 1 deletion sdk/src/metrics/export/periodic_exporting_metric_reader.cc
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Expand Up @@ -2,6 +2,7 @@
// SPDX-License-Identifier: Apache-2.0

#include "opentelemetry/sdk/metrics/export/periodic_exporting_metric_reader.h"
#include "opentelemetry/common/spin_lock_mutex.h"
#include "opentelemetry/sdk/common/global_log_handler.h"
#include "opentelemetry/sdk/metrics/push_metric_exporter.h"

Expand Down Expand Up @@ -101,6 +102,7 @@ bool PeriodicExportingMetricReader::CollectAndExportOnce()
bool notify_force_flush = is_force_flush_pending_.exchange(false, std::memory_order_acq_rel);
if (notify_force_flush)
{
std::unique_lock<std::mutex> lk(force_flush_m_);
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is_force_flush_notified_.store(true, std::memory_order_release);
force_flush_cv_.notify_one();
}
Expand Down Expand Up @@ -191,7 +193,11 @@ bool PeriodicExportingMetricReader::OnShutDown(std::chrono::microseconds timeout
{
if (worker_thread_.joinable())
{
cv_.notify_one();
{
// ensure that `cv_` is awaiting, and the update doesn't get lost
std::unique_lock<std::mutex> lk(cv_m_);
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cv_.notify_one();
}
worker_thread_.join();
}
return exporter_->Shutdown(timeout);
Expand Down
10 changes: 3 additions & 7 deletions sdk/src/metrics/metric_reader.cc
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Expand Up @@ -48,10 +48,7 @@ bool MetricReader::Shutdown(std::chrono::microseconds timeout) noexcept
OTEL_INTERNAL_LOG_WARN("MetricReader::Shutdown - Cannot invoke shutdown twice!");
}

{
const std::lock_guard<opentelemetry::common::SpinLockMutex> locked(lock_);
shutdown_ = true;
}
shutdown_.store(true, std::memory_order_release);

if (!OnShutDown(timeout))
{
Expand All @@ -65,7 +62,7 @@ bool MetricReader::Shutdown(std::chrono::microseconds timeout) noexcept
bool MetricReader::ForceFlush(std::chrono::microseconds timeout) noexcept
{
bool status = true;
if (shutdown_)
if (IsShutdown())
{
OTEL_INTERNAL_LOG_WARN("MetricReader::Shutdown Cannot invoke Force flush on shutdown reader!");
}
Expand All @@ -79,8 +76,7 @@ bool MetricReader::ForceFlush(std::chrono::microseconds timeout) noexcept

bool MetricReader::IsShutdown() const noexcept
{
const std::lock_guard<opentelemetry::common::SpinLockMutex> locked(lock_);
return shutdown_;
return shutdown_.load(std::memory_order_acquire);
}

} // namespace metrics
Expand Down