[LinuxUsers] 1 second boot

[Jeff Lasman]

On Thursday 16 July 2009 02:44 am, Chris Penn wrote:

> Ok, so now what, a computer that just stays on.....
> http://www.mvista.com/press_release_detail.php?fid=news/2009/Ultra-fa
>st-boot.html

Sure... they're called ...

Mine <smile>.

I've got a rack full (actually only half full because of heat issues) of 
computers that always stay on, so they can serve web-pages.

But going further ... read from the article...

<snip>
achieving a level of previously unmatched performance on any embedded 
Linux.
</snip>

I won't go so far as to say this smacks of grandstanding, but if it 
wasn't done before there's no reason why it couldn't have been.  Any 
embedded system can be built with a quick boot process that moves an 
entire state from persistent solid state storage to ram as fast as you 
can move a few kbytes.

Shutting down might be a bit slower; it takes a bit longer to write the 
memory back.

Years ago, Microsoft did the opposite; they speeded up the shutdown 
process by identifying process which didn't have to be shut down in an 
orderly fashion.  They simply shut down processes which needed an 
orderly shutdown, then pulled the power, effectively killing the 
others.

But there's no reason to shut down any processes in an embedded system; 
just move the entire state to persistent storage and pull the plug.

Some processes, which may be clock dependent, may need a bit of tweaking 
to check the clock, but that's about it.

Anyone care to disagree so we can start a discourse?

Jeff
-- 
Jeff Lasman, Nobaloney Internet Services
P.O. Box 52200, Riverside, CA  92517
Our jplists address used on lists is for list email only
voice:  +1 951 643-5345, or see: 
"http://www.nobaloney.net/contactus.html"