Re: How to use perf to log page faults

[Andi Kleen <andi@halobates.de>]

Taras Glek <tglek@mozilla.com> writes:

> Hi,
> From the docs it seems that perf may be useful for logging page
> faults. I tried
> perf record -g -d -f -e page-faults <mycommand>
> but all I got were PERF_RECORD_MMAP events.
>
> I'm using 2.6.32. Ideally I'd like to collect fault addresses and
> userspace stacks that caused them. Isn't this what the page-fault
> event is for?

Some time ago I used systemtap to do this for my pbitmaps
works. This was the old systemtap script.

-Andi

probe vm.pagefault  { 
	if (task_execname(task_current()) == "executable" && address < 0x100000000) { 
		printf("%u\n", address); 
	}

} 



-- 
ak@linux.intel.com -- Speaking for myself only.