The current Linux kernel /proc/PID interface is great, time-proven and reliable way to get info about processes running on a system. Right? Well, yes and no. We found out (and you, too, might have noticed it) this is what makes ps and top slow when there are thousands of processes running. Besides the speed, there are a number of other problems with the current /proc/PID interface.
The talk describes all those in great details, then goes on to the alternative we are proposing for inclusion to the kernel, a new interface called task_diag. The new interface is slick, fast (5-10x speed improvement), and extendable.
Kernel knowledge is not expected from the audience.