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Re: Exec Security [message #179003 is a reply to message #179002]

Sun, 02 September 2012 11:02

The Natural Philosoph
Messages: 993
Registered: September 2010

Karma:

Senior Member

J.O. Aho wrote:
> Ryan wrote:
>
>> The daemon idea sounds interesting but seems a waste to always be
>> runing in the backgound when nothing needs processed.
>
> I doubt you are using something less powerful than my Nokia N900 and
> even on the N900 you won't notice a daemon which does idle most of it's
> life.
>
> Go for security, it's not a X-Windows you will have running which would
> waist RAM and CPU on a server.
>

The general way a daemon comes into play at the OS level - at least on
*nix systems - is that the multi-tasking scheduler scans all the
sleeping processes and if nothing has happened to wake them up, skips
them. This is at most a few machine cycle per process.

What is consumed is memory, virtual or otherwise.
Even the wake up process is relatively efficient. Ignoring paging memory
in or out of swap space, all that happens is that the current processor
state is stored in a special area, and the sleeping task context
restored from kernel memory. The task then resumes from where it left
off. If its memory space is paged out, then another daemon will be
awoken to page it in.

--
Ineptocracy

(in-ep-toc’-ra-cy) – a system of government where the least capable to
lead are elected by the least capable of producing, and where the
members of society least likely to sustain themselves or succeed, are
rewarded with goods and services paid for by the confiscated wealth of a
diminishing number of producers.

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[Message index]

		Exec Security By: Ryan on Sat, 01 September 2012 01:49
		Re: Exec Security By: Jerry Stuckle on Sat, 01 September 2012 02:12
		Re: Exec Security By: J.O. Aho on Sat, 01 September 2012 06:54
		Re: Exec Security By: Ryan on Sat, 01 September 2012 09:51
		Re: Exec Security By: J.O. Aho on Sat, 01 September 2012 11:19
		Re: Exec Security By: Ryan on Sat, 01 September 2012 18:50
		Re: Exec Security By: Ryan on Sat, 01 September 2012 20:19
		Re: Exec Security By: Jerry Stuckle on Sat, 01 September 2012 20:26
		Re: Exec Security By: Ryan on Sat, 01 September 2012 21:11
		Re: Exec Security By: Jerry Stuckle on Sat, 01 September 2012 23:14
		Re: Exec Security By: Ryan on Sun, 02 September 2012 00:17
		Re: Exec Security By: J.O. Aho on Sun, 02 September 2012 07:25
		Re: Exec Security By: The Natural Philosoph on Sun, 02 September 2012 11:02
		Re: Exec Security By: Ryan on Mon, 03 September 2012 03:32
		Re: Exec Security By: Ryan on Mon, 03 September 2012 03:35
		Re: Exec Security By: Jerry Stuckle on Mon, 03 September 2012 03:43
		Re: Exec Security By: Ryan on Mon, 03 September 2012 03:53
		Re: Exec Security By: J.O. Aho on Mon, 03 September 2012 04:55
		Re: Exec Security By: J.O. Aho on Sat, 01 September 2012 21:23

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