When we make a Thread we could do with an option to pass a hint to say how we want that code run. Additionally a mechanism to set the default for this and child

When we make a Thread we could do with an option to pass a hint to say how we want that code run. Additionally a mechanism to set the default for this and child processes where no hint is set could be used in command line settings in the same way nice and other such programs work so that it can be done as they launched or after launch. It is after all a kernel choice where code is run but programmers and runners of these tools need some control knowing what they need.