Influence of application priority on IPC

Hello to everyone!

I have a question about influence of application priority on IPC messaging mechanism. Let's say I have two applications (client and server) which use IPC for communication with each other. In run script I set the priority of client to default value (no priority specified) and the priority of server to -1 (value of prio_levels is equal to 2). The question is quite simple: is there any determined dependency between changing the priority of applications and possible collisions of IPC calls? For example, what if both priorities are set to default values or to -1? And if there is a suspect of lost IPC messages, then how this hypothesis can be checked?

Thank you in advance.

Kind regards, Sergey.