[infra] Match workers and jobs per core #13102
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@jonathanmetzman Is anything wrong with this and my others pull requests? |
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Apr 27, 2025
Although the `parallel-fuzzing` input parameter is documented `to use all available cores for fuzzing` it is not how it currently works because as it is written in libfuzzer documentation [`These jobs will be run across a set of worker processes, by default using half of the available CPU cores;`](https://llvm.org/docs/LibFuzzer.html#:~:text=These%20jobs%20will%20be%20run%20across%20a%20set%20of%20worker%20processes%2C%20by%20default%20using%20half%20of%20the%20available%20CPU%20cores%3B) I.e. currently when `parallel-fuzzing` is set to `true` it uses for example 1 core on a 2 cores machine. The PR makes jobs number always match the workers number. Additionally a user may specify the number of cores to use manually.
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Although the
parallel-fuzzinginput parameter is documentedto use all available cores for fuzzingit is not how it currently works because as it is written in libfuzzer documentationThese jobs will be run across a set of worker processes, by default using half of the available CPU cores;I.e. currently when
parallel-fuzzingis set totrueit uses for example 1 core on a 2 cores machine.The PR makes jobs number always match the workers number. Additionally a user may specify the number of cores to use manually.