linuxaudio.org

Back on Sunday 18 May 2008, Paul Davis was like:

quoted text
> On Sat, 2008-05-17 at 19:12 -0500, Reuben Martin wrote:

> > I guess I just wasn't aware that there are 4 separate jackd processes

> > that run. That makes a lot more sense now.

>

> terminology (simplified)

>

> 	"TASK" : a kernel-level thread

> 	"THREAD" : a user-space thread

> 	"PROCESS" : 1 or more threads, plus an

> 	   address space and a file table

>

> JACK is a single process involving multiple threads.

>

> --p

Why then are the threads assigned separate PIDs? I was under the assumption

that PID stood for "Process Identifier". (Perhaps "Posix thread IDentifier"

would be a better definition of the acronym)  I was totally unaware that you

could assign process threads separate scheduling priorities / policies apart

from the parent process.
Also, is it possible (within the context of programming) to assign threads

individual names to give an indication as to what the specific PID is doing,

or are thread PID names always named the same as the parent process?
I'm sure these questions open up a whole can of worms dealing with the mess of

conforming modern programming concepts to an aging POSIX framework.
-Reuben

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