Boot poster challenge

[Terje Bless]

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Ziga Mahkovec <ziga.mahkovec at klika.si> wrote:

>http://www.klika.si/ziga/bootchart/bootchart-rhgbfix.png
>(boot time: 0:46, yay)

Hmmm.

What happens to overall boot time if rhgb and dhclient is disabled, with and
without readahead?

Both rhgb and dhclient seem like they can be optimized individually — so their
contribution to overall boot time can be disregarded while studying the rest
of the boot process — and given the relative runtime and order of readahead
vs. the following processes, readahead looks like it may be wasted here.


Also interesting would be a graph of a minimal boot — disable all nonessential
services; portmap, rpc, gpm, cups, etc. — into text console. It'd reduce the
“noise” in the graph and might reveal something interesting about the
remaining processes.



Oh, BTW, what is that apparent zombie of S04readahead_early? Just a timing
issue with the sampling?


- -- 
We've gotten to the point where a human-readable, human-editable text format
for structured data has become a complex nightmare where somebody can safely
say  "As many threads on xml-dev have shown, text-based processing of XML is
hazardous at best"  and be perfectly valid in saying it.     -- Tom Bradford

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