I tried to use Concurrent.available_processor_count in parallel gem, but we got some feedback Concurrent.available_processor_count returned a negative value. grosser/parallel#348 (comment) grosser/...

Fix the return value of `Concurrent.available_processor_count` when `cpu.cfs_quota_us` is -1 by y-yagi · Pull Request #1060 · ruby-concurrency/concurrent-ruby