Cheng Chang f7613e2a9e Make it able to lower cpu priority to specific level in threadpool (#6969) ...

Summary:
`Env::LowerThreadPoolCPUPriority` takes a new parameter `CpuPriority` to be able to lower to a specific priority such as `CpuPriority::kIdle`, previously, the priority is always lowered to `CpuPriority::kLow`.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/6969

Test Plan: unit test `EnvPosixTest::LowerThreadPoolCpuPriority` added to `env_test.cc`.

Reviewed By: siying

Differential Revision: D22011169

Pulled By: cheng-chang

fbshipit-source-id: 568878c24a924912e35cef00c552d4a63431cdf4

2020-06-13 13:25:20 -07:00

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rocksdb

Make it able to lower cpu priority to specific level in threadpool (#6969)

2020-06-13 13:25:20 -07:00