Re: The Shepherd on Fibers

[pelzflorian (Florian Pelz)]

On Sat, Mar 26, 2022 at 07:27:00PM +0800, Zhu Zihao wrote:
> 
> IIUC, After fork and execute the program, shepherd will wait for the pid
> file to appear. This is a block operation.
> 
> Shepherd on Fiber make this operation non-blocking (because the pid file
> is created by Linux kernel, Shepherd just need to wait for it), every
> service activation runs on its own fiber. after fork+exec, shepherd
> suspend current fiber, andspawn another fiber to start another service
> immediately.
> 
> But finally all fibers are co-operatively scheduled on 1 thread.

Thank you Zhu for explaining!  I had not understood waiting for the
PID file is the issue solved by fibers.

Regards,
Florian