Ubuntu 7.10 on a Laptop slow startup

[Steve Flynn]

On Dec 29, 2007 3:01 AM, NoOp <glgxg at sbcglobal.net> wrote:

> I've always found issues with bootchart:
>
> 1. It causes the system to boot slower (due to creating the chart)

It does - marginally. That's why it's a diagnostic tool - you only run
it when you want to find out what's taking cpu cycles and disk IO in
the boot process.

> 2. I've never been able to interpret just what it is showing. Nice
> graphic, but can't view much as it's such a large png and there doesn't
> seem to be any help/explanation as to what you are looking at.

It's a big graph of what's taking up cpu cycles and disk io during the
boot process.... it's up to you to interpret what you see.

> Take http://www.arumes.com/temp/gutsy-20071228-2.png for example; what
> exactly does that png show? How do you read it?

I see a large period where usplash is consuming large amounts of cpu
cycles, thus slowing everything else down Therefore, you disable
<suspect program> and reboot to compare the graphic...

> http://www.arumes.com/temp/gutsy-20071228-1.png seems to be somewhat
> better, but again, how do you read it and determine what is the cause of
> the slow startup?

I'd call a bootup time reduced from 157 seconds to 26 seconds a bit of result...

> IMHO asking someone to install bootchart doesn't help much unless you
> provide details as to what they should be looking for in the bootchart.

On the other hand, until someone installs bootchart and produces
evidence for the rest of the world to see, it's rather difficult to
diagnose slow boots.

-- 
Steve
When one person suffers from a delusion it is insanity. When many
people suffer from a delusion it is called Religion.

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