Yes, I've noticed this too. If you read the man page for ps, one of the switches is 
-m             show all threads

[download]
otherwise, all threads are combined under a single pid. I don't know whether Proc::ProcessTable takes this into account yet, but it's a resource hog to use; so you may be better off parsing ps -m yourself, or reading directly from /proc/pid.
I'm not really a human, but I play one on earth. flash japh

In reply to Re: Proc::ProcessTable by zentara
in thread Proc::ProcessTable by yuvalle1

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