Comment 17 for bug 432089

Hernando Torque [2009-10-15 21:17 -0000]:
> @Martin Pitt: Are you referring to the bar in the chart not being red?

I did yes. That, and grub->gdm now taking 85 seconds, where it took
just 50 in jaunty.

> Maybe bootchart doesn't represent sreadahead very well, because when put
> in foreground you can see I/O going on while the bar is still gray:
> http://img.xrmb2.net/images/660462.png

It might also be a bootchart bug of course, assigning the I/O to wrong
processes. However, I don't quite believe that: As you see in my
bootchart [1], sreadahead starts and just has a tiny fraction of a
second before other processes kick in and use I/O. In the readahead
times it was the only active process for some 15 seconds, to avoid
trashing with other processes.

Martin

[1] http://people.canonical.com/~pitti/tmp/tick-karmic-20090924-2.png
--
Martin Pitt | http://www.piware.de
Ubuntu Developer (www.ubuntu.com) | Debian Developer (www.debian.org)