How to get information about process in Linux

How can I get process statistics from the kernel and return the buf as the following?

number of processes : ticks_user : ticks_system : ticks_interrupt :开发者_JAVA技巧 cpuseconds : procsizes : resident segment sizes

I found some information in /proc/[pid]/stat, but there is no data about ticks system, ticks_interrupt, and cpusecond.

Where can I find information about these?

Any pointers to API or documentation will be helpful.

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Use

ps ax
top
htop

for the start, read the manpage, and for top/htop press h to get a help screen q to quit;

However, none of the manpages mentions ticks - what is it?

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You may can give vmstat a try. It is not in ticks, but why do you need ticks?

CPU
   These are percentages of total CPU time.
   us: Time spent running non-kernel code. (user time, including nice time)
   sy: Time spent running kernel code. (system time)
   id: Time spent idle. Prior to Linux 2.5.41, this includes I/O-wait time.
   wa: Time spent waiting for I/O. Prior to Linux 2.5.41, included in idle.
   st: Time stolen from a virtual machine. Prior to Linux 2.6.11, unknown.

What are you planing to do with this information?

Sometimes it may also to grep through the kernel sources, trying your buzzwords.