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aba80d0734
Summary:
This patch adds a benchmarking infrastructure for llvm-libc memory functions.
In a nutshell, the code can benchmark small and large buffers for the memcpy, memset and memcmp functions.
It also produces graphs of size vs latency by running targets of the form `render-libc-{memcpy|memset|memcmp}-benchmark-{small|big}`.
The configurations are provided as JSON files and the benchmark also produces a JSON file.
This file is then parsed and rendered as a PNG file via the `render.py` script (make sure to run `pip3 install matplotlib scipy numpy`).
The script can take several JSON files as input and will superimpose the curves if they are from the same host.
TODO:
- The code benchmarks whatever is available on the host but should be configured to benchmark the -to be added- llvm-libc memory functions.
- Add a README file with instructions and rationale.
- Produce scores to track the performance of the functions over time to allow for regression detection.
Reviewers: sivachandra, ckennelly
Subscribers: mgorny, MaskRay, libc-commits
Tags: #libc-project
Differential Revision: https://reviews.llvm.org/D72516
37 lines
1.2 KiB
C++
37 lines
1.2 KiB
C++
//===-------- BenchmarkRunner interface -------------------------*- 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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#ifndef LLVM_LIBC_UTILS_BENCHMARK_MEMORY_BENCHMARK_MAIN_H
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#define LLVM_LIBC_UTILS_BENCHMARK_MEMORY_BENCHMARK_MAIN_H
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#include "LibcBenchmark.h"
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/StringRef.h"
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namespace llvm {
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namespace libc_benchmarks {
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// Each memory function benchmark implements this interface.
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// It is used by the main function to run all benchmarks in a uniform manner.
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class BenchmarkRunner {
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public:
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virtual ~BenchmarkRunner() {}
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// Returns a list of all available functions to test.
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virtual ArrayRef<StringRef> getFunctionNames() const = 0;
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// Performs the benchmarking for a particular FunctionName and Size.
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virtual BenchmarkResult benchmark(const BenchmarkOptions &Options,
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StringRef FunctionName, size_t Size) = 0;
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};
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} // namespace libc_benchmarks
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} // namespace llvm
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#endif // LLVM_LIBC_UTILS_BENCHMARK_MEMORY_BENCHMARK_MAIN_H
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