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f670112a59
This patch adds support for validation counters. Validation counters can be used to measure events that occur during snippet execution like cache misses to ensure that certain assumed invariants about the benchmark actually hold. Validation counters are setup within a perf event group, so are turned on and off at exactly the same time as the "group leader" counter that measures the desired value.
44 lines
1.5 KiB
C++
44 lines
1.5 KiB
C++
//===-- LatencyBenchmarkRunner.h --------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// A BenchmarkRunner implementation to measure instruction latencies.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TOOLS_LLVM_EXEGESIS_LATENCY_H
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#define LLVM_TOOLS_LLVM_EXEGESIS_LATENCY_H
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#include "BenchmarkRunner.h"
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#include "Target.h"
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namespace llvm {
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namespace exegesis {
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class LatencyBenchmarkRunner : public BenchmarkRunner {
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public:
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LatencyBenchmarkRunner(const LLVMState &State, Benchmark::ModeE Mode,
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BenchmarkPhaseSelectorE BenchmarkPhaseSelector,
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Benchmark::ResultAggregationModeE ResultAggMode,
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ExecutionModeE ExecutionMode,
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ArrayRef<ValidationEvent> ValCounters,
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unsigned BenchmarkRepeatCount);
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~LatencyBenchmarkRunner() override;
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private:
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Expected<std::vector<BenchmarkMeasure>>
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runMeasurements(const FunctionExecutor &Executor) const override;
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Benchmark::ResultAggregationModeE ResultAggMode;
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unsigned NumMeasurements;
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};
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} // namespace exegesis
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} // namespace llvm
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#endif // LLVM_TOOLS_LLVM_EXEGESIS_LATENCY_H
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