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.
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 img.xrmb2. net/images/ 660462. png
> in foreground you can see I/O going on while the bar is still gray:
> http://
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 www.piware. de
--
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