Feature Request: Thread Affinity

[Tianpingan]

Hi Developers!

We are building a new application on top of high performance storage products, NVMe SSDs for example along with RocksDB. To fully utilize potentials of the hardware, we are using a Thread-per-Core model, similar to SPDK, Seastar and Glommio, meaning we need to dedicate a few cores to them.

After investigation, we see two options: isolcpus and thread-affinity. We rule out the former as it is not flexible enough and does not meet deployment requirements. RocksDB is extensible through Env, where Filesystem, etc are abstracted. Unfortunately, I do not see a good place to plug thread affinity in.

A preliminary attempt is made here.

[hilikspdb]

We can add an callback to the env "on_thread_starts" and call it with the relevant parameters , the user will need to implement the callback and change the attributes of the thread.

[Tianpingan]

We can add an callback to the env "on_thread_starts" and call it with the relevant parameters , the user will need to implement the callback and change the attributes of the thread.

Thank you!
what can I do for this issue to help you

[erez-speedb]

Passed perf tests