On Tue, May 25, 2010 at 6:25 AM, Vivek Goyal <firstname.lastname@example.org> wrote:
I agree with Vivek here. We use blkio.time as a source for io rate
count for each cgroup, knowing that it is not entirely accurate but a
good enough approximation.
Gui, if you want to find out whether the cgroup has enough weight or
not, I'd recommend looking at the wait_time stat in addition to
blkio.time. It has been very useful in identifying jobs that are not
getting enough IO done due to less weight assigned to them.