pthread_create() spawns 2 threads upon first call (what is the first thread?)

Hello All,

I have an application running in an embedded Linux system that calls pthread_create() multiple times to create multiple threads. For some reason, the first time I call pthread_create(), I see two pid's added when I execute the "ps" command at the Linux console. The second thread is the one that I actually intended to spawn. I don't know what the first thread is doing and what it is for.

Why is this happening? How can I prevent the extraneous thread from being created? How do I find out information on what this thread is for?

Best Regards,
Jerry

A bit of research revealed that the first time pthread_create is called, Linux will create a pthread manager process that manages threads of a process. Not sure what it does, but I guess I don't care as long as I know what it is. I'll assume it's not doing anything bad

Best Regards,
Jerry

Yes. you are correct. its the mediator thread created once for first thread creation for a process.
On Desktop linux machine I cant see this extra thread. but on development board I could see it with all processes creating threads. Dont know exactly why ? its depends on library implementation(included) with complier.

BRegards
geek