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
25 lines
457 B
JSON
25 lines
457 B
JSON
{
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"Options":{
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"MinDuration":0.001,
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"MaxDuration":1,
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"InitialIterations":100,
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"MaxIterations":10000000,
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"MinSamples":4,
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"MaxSamples":1000,
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"Epsilon":0.01,
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"ScalingFactor":1.4
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},
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"Configuration":{
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"Runs":10,
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"BufferSize":8192,
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"Size":{
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"From":0,
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"To":1024,
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"Step":1
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},
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"AddressAlignment":1,
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"MemsetValue":0,
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"MemcmpMismatchAt":0
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}
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}
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