[dtrace-discuss] Re: Detect stack size

[Trond Norbye]

>> Casper wrote:
>> In order to get stack use you can use "pmap -x" or
>> just measure the difference between the deepest stack frame and
>> the top of the stack. (Which requires identifying that point)

It was something like the last part there I was hoping to do with DTrace. Since the pid-provider can fire a probe on function calls, I was hoping there was some kind of magic that I could do to get the stack pointer ;-) 

Deepti wrote:
> above  is manual. I guess user asked how to do it in
> application. although I don't know how question is relevant to
> dtrace-discuss alias unless he wanted to trace it thru dtrace script, but
> email wanting to do it thru dtrace.

See above.. I will of course appreciate all hints and tips ;)  

Casper wrote:
> > You might be able to entise all the zero-fill-on-demand page faults on
> > the thread stacks and get a stack trace at those points.

How do I do such a thing? any pointers?

> > If you needed to grow the thread stacks to 4MB, then there already
> > is some issue.

I know :-( The problem is that this is a big and complex daemon process so I don't know where to start to look ;-)

Trond
 
 
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