Re: fanotify as syscalls

[Arjan van de Ven]

On Thu, 17 Sep 2009 09:40:16 -0700 (PDT)
Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
> 
> And then we have page faults. I've long wished that from a system
> call tracing standpoint we could show page faults as
> pseudo-system-calls (at least as long as they happen from user space
> - trying to handle nesting is not worth it). It would make it _so_
> much more obvious what the performance patterns are if you could just
> do
> 
> 	strace -ttT firefox
> 
> for the cold-cache case and you'd see where the time is really spent.
> 
> (yeah, yeah, you can get that kind of information other ways, but
> it's a hell of a lot less convenient than just getting a nice trace
> with timestamps).

ohhh I should add pagefaults to timechart
good one.


-- 
Arjan van de Ven 	Intel Open Source Technology Centre
For development, discussion and tips for power savings, 
visit http://www.lesswatts.org
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/