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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
#include <benchmark/benchmark.h>
#include <map>
#include <string>
#include <utility>
#include <vector>
#include "opentelemetry/common/key_value_iterable_view.h"
#include "opentelemetry/context/context_value.h" // IWYU pragma: keep
#include "opentelemetry/exporters/memory/in_memory_span_exporter.h"
#include "opentelemetry/nostd/shared_ptr.h"
#include "opentelemetry/nostd/string_view.h"
#include "opentelemetry/sdk/resource/resource.h"
#include "opentelemetry/sdk/trace/exporter.h"
#include "opentelemetry/sdk/trace/processor.h"
#include "opentelemetry/sdk/trace/sampler.h"
#include "opentelemetry/sdk/trace/samplers/always_off.h"
#include "opentelemetry/sdk/trace/samplers/always_on.h"
#include "opentelemetry/sdk/trace/samplers/parent.h"
#include "opentelemetry/sdk/trace/samplers/trace_id_ratio.h"
#include "opentelemetry/sdk/trace/simple_processor.h"
#include "opentelemetry/sdk/trace/tracer.h"
#include "opentelemetry/sdk/trace/tracer_context.h"
#include "opentelemetry/trace/span.h"
#include "opentelemetry/trace/span_context.h"
#include "opentelemetry/trace/span_context_kv_iterable_view.h"
#include "opentelemetry/trace/span_metadata.h"
#include "opentelemetry/trace/trace_id.h"
#include "opentelemetry/trace/tracer.h"
using namespace opentelemetry::sdk::trace;
using opentelemetry::exporter::memory::InMemorySpanExporter;
using opentelemetry::trace::SpanContext;
namespace
{
// Sampler constructor used as a baseline to compare with other samplers
void BM_AlwaysOffSamplerConstruction(benchmark::State &state)
{
while (state.KeepRunning())
{
benchmark::DoNotOptimize(AlwaysOffSampler());
}
}
BENCHMARK(BM_AlwaysOffSamplerConstruction);
// Sampler constructor used as a baseline to compare with other samplers
void BM_AlwaysOnSamplerConstruction(benchmark::State &state)
{
while (state.KeepRunning())
{
benchmark::DoNotOptimize(AlwaysOnSampler());
}
}
BENCHMARK(BM_AlwaysOnSamplerConstruction);
/*
Fails to build with GCC.
See upstream bug: https://github.com/google/benchmark/issues/1675
*/
#if 0
void BM_ParentBasedSamplerConstruction(benchmark::State &state)
{
while (state.KeepRunning())
{
benchmark::DoNotOptimize(ParentBasedSampler(std::make_shared<AlwaysOnSampler>()));
}
}
BENCHMARK(BM_ParentBasedSamplerConstruction);
void BM_TraceIdRatioBasedSamplerConstruction(benchmark::State &state)
{
while (state.KeepRunning())
{
benchmark::DoNotOptimize(TraceIdRatioBasedSampler(0.01));
}
}
BENCHMARK(BM_TraceIdRatioBasedSamplerConstruction);
#endif
// Sampler Helper Function
void BenchmarkShouldSampler(Sampler &sampler, benchmark::State &state)
{
opentelemetry::trace::TraceId trace_id;
opentelemetry::trace::SpanKind span_kind = opentelemetry::trace::SpanKind::kInternal;
using M = std::map<std::string, int>;
M m1 = {{}};
using L =
std::vector<std::pair<opentelemetry::trace::SpanContext, std::map<std::string, std::string>>>;
L l1 = {{opentelemetry::trace::SpanContext(false, false), {}},
{opentelemetry::trace::SpanContext(false, false), {}}};
opentelemetry::common::KeyValueIterableView<M> view{m1};
opentelemetry::trace::SpanContextKeyValueIterableView<L> links{l1};
while (state.KeepRunning())
{
auto invalid_ctx = SpanContext::GetInvalid();
benchmark::DoNotOptimize(
sampler.ShouldSample(invalid_ctx, trace_id, "", span_kind, view, links));
}
}
// Sampler used as a baseline to compare with other samplers
void BM_AlwaysOffSamplerShouldSample(benchmark::State &state)
{
AlwaysOffSampler sampler;
BenchmarkShouldSampler(sampler, state);
}
BENCHMARK(BM_AlwaysOffSamplerShouldSample);
// Sampler used as a baseline to compare with other samplers
void BM_AlwaysOnSamplerShouldSample(benchmark::State &state)
{
AlwaysOnSampler sampler;
BenchmarkShouldSampler(sampler, state);
}
BENCHMARK(BM_AlwaysOnSamplerShouldSample);
void BM_ParentBasedSamplerShouldSample(benchmark::State &state)
{
ParentBasedSampler sampler(std::make_shared<AlwaysOnSampler>());
BenchmarkShouldSampler(sampler, state);
}
BENCHMARK(BM_ParentBasedSamplerShouldSample);
void BM_TraceIdRatioBasedSamplerShouldSample(benchmark::State &state)
{
TraceIdRatioBasedSampler sampler(0.01);
BenchmarkShouldSampler(sampler, state);
}
BENCHMARK(BM_TraceIdRatioBasedSamplerShouldSample);
// Sampler Helper Function
void BenchmarkSpanCreation(std::unique_ptr<Sampler> &&sampler, benchmark::State &state)
{
std::unique_ptr<SpanExporter> exporter(new InMemorySpanExporter());
std::unique_ptr<SpanProcessor> processor(new SimpleSpanProcessor(std::move(exporter)));
std::vector<std::unique_ptr<SpanProcessor>> processors;
processors.push_back(std::move(processor));
auto resource = opentelemetry::sdk::resource::Resource::Create({});
auto context =
std::make_shared<TracerContext>(std::move(processors), resource, std::move(sampler));
auto tracer = std::shared_ptr<opentelemetry::trace::Tracer>(new Tracer(context));
while (state.KeepRunning())
{
auto span = tracer->StartSpan("span");
span->SetAttribute("attr1", 3.1);
span->End();
}
}
// Test to measure performance for span creation
void BM_SpanCreation(benchmark::State &state)
{
std::unique_ptr<Sampler> sampler(new AlwaysOnSampler());
BenchmarkSpanCreation(std::move(sampler), state);
}
BENCHMARK(BM_SpanCreation);
// Test to measure performance overhead for no-op span creation
void BM_NoopSpanCreation(benchmark::State &state)
{
std::unique_ptr<Sampler> sampler(new AlwaysOffSampler());
BenchmarkSpanCreation(std::move(sampler), state);
}
BENCHMARK(BM_NoopSpanCreation);
} // namespace
BENCHMARK_MAIN();
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