On Mon, Mar 30, 2015 at 05:09:52PM +0200, Marc Cousin wrote:
> > So it would be good to sample the active threads and see where it's
> > spending the time. It could be the somewhere in the rb-tree representing
> > extents, but that's a guess.
> >
> I just need to be told how to do that :)
>
> Something like a perf top ?
for i in `pgrep btrfs`; do
ps $i
sudo cat /proc/$i/stack 2>/dev/null
done
and capture samples every second.
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