On Mon, 2004-11-15 at 20:05 -0500, Owen Taylor wrote:
> Wow, this is fabulous work, and fast too!
Thanks :)
> What sort of libraries are you using in the Java program? Do you have
> any idea whether getting it to run on top of open source Java would
> be feasible?
I'm using the java2d and imageio packages with IBM's JDK. It doesn't
work out of the box with libgcj though, so I'll have to come up to speed
with the java2d/cairo development. Alternatively, I can always drop the
alpha/antialias pertiness. Or switch to SVG instead and let librsvg do
the work.
Anyway, I'll upload the script and source code once I clean things up.
> How are you computing the different shades of yellow and gray? Are
> you looking at differences in the TIME column?
Only running (yellow) processes are shaded. It goes like this:
- check S (status) column:
- D (unint. sleep) -> gray
- S (sleeping) -> light gray
- Z (zombie) -> dark gray
- T (traced) -> redish (but I haven't seen any)
- R (running) -> check %CPU column, use #ffcb00 with alpha
ranging from 50% to 100% (128 + CPU*128)
There were also some white gaps which needed squashing (fixed and
updated the chart).
> Just glancing at the initial image certainly brings all sorts of
> questions to mind:
>
> - Why is rhgb eating so much CPU? if you run 'rhgb -i' it displays
> basically 0 CPU to display the animation. That looks like a
> pretty obvious bug we completely missed.
You seem to have tracked this one down, but here's the output without
rhgb for comparison:
http://www.klika.si/ziga/bootchart/bootchart-norhgb.png
(boot time went from 1:27 to 0:51)
> - Is it just a coincidence that dhclient gets the lease almost
> exactly simultaneously with readahead finishing? Is readahead
> blocking the rest of the system?
>
> - Is readahead doing any good at all? Would it still be doing good
> if we fixed blocking boot for 20 seconds on dhclient?
http://www.klika.si/ziga/bootchart/bootchart-noreadahead.png
(boot time: 0:49 -- note that this is *with* rhgb)
Without rhgb and readahead:
http://www.klika.si/ziga/bootchart/bootchart-norhgbreadahead.png
(boot time: 0:51 -- so these guys obviously don't play well together)
> - What does GNOME login look like?
If I parse up to the point where gnome-panel is running and the system
is 90% idle:
http://www.klika.si/ziga/bootchart/bootchart-login.png
All corresponding bootop.log.{norhgb,login,...}.gz log files are also
available.
> Anyways, I'm very impressed, looks like I'll have to start figuring
> out shipping to Slovenia :-) (*)
I'd think this has gotten easier since we joined the EU :)
> (*) Let me know when you think you you are at a point where you think
> you have something you'd like to have as a poster, and we can
> work out how to best implement the details of my offer.
Will do, thanks!
--
Ziga
