Re: {bb} CPU Load: Windows vs UNIX

[Chris Hoogendyk <hoogendyk@bio.umass.edu>]

since windows wasn't built originally as a proper multitasking
environment, it makes sense that it wouldn't (or couldn't) be thinking
in terms of tasks waiting.


---------------

Chris Hoogendyk

-
   O__  ---- Systems Administrator
  c/ /'_ --- Biology & Geology Departments
 (*) \(*) -- 140 Morrill Science Center
~~~~~~~~~~ - University of Massachusetts, Amherst 

<hoogendyk@bio.umass.edu>

--------------- 

Erdös 4




Ryan Novosielski wrote:
> Likely the problem is not the Windows BB agent, but Windows itself. Have
> you noticed how "load" is measured by task manager in windows? It seems
> to deal largely in percentages, more specifically percentage of idle. I
> don't know if the same metric exists for Windows (ie. processes waiting
> for execution).
>
>  ---- _  _ _  _ ___  _  _  _
>  |Y#| |  | |\/| |  \ |\ |  | |Ryan Novosielski - User Support Spec. III
>  |$&| |__| |  | |__/ | \| _| |novosirj@umdnj.edu - 973/972.0922 (2-0922)
>  \__/ Univ. of Med. and Dent.|IST/AST - NJMS Medical Science Bldg - C630
>
>
> Lose, James wrote:
> >> Phil,
> >>
> >> Thank you for the explanation. I guessed as much, but it's good to have
> >> someone else confirm my suspicions.
> >>
> >> I wonder why the developers of the Windows BB agent decided to use the
> >> name "load" to describe a measurement that is incompatible with the
> >> already established UNIX "load"? If only the code for the Windows BB
> >> agent were freely available, like that of the UNIX agent, then I could
> >> have figured it out and fixed the problem myself.
> >>
> >> Thanks, again.
> >>
> >> Jim Lose
> >>
> >> -----Original Message-----
> >> From: owner-bb@bb4.com [mailto:owner-bb@bb4.com] On Behalf Of Philip
> >> Clark
> >> Sent: Tuesday, April 25, 2006 8:16 PM
> >> To: bb@bb4.com
> >> Subject: Re: {bb} CPU Load: Windows vs UNIX
> >>
> >> On Tue, 2006-04-25 at 19:33, Lose, James wrote:
> >>> How do the CPU load values returned by the Windows and UNIX BB agents
> >>> compare? Is there a way to equate the two?
> >> The short answer is no.
> >>
> >> As I understand it, the Windows value is utilization (the inverse of
> >> idleness) while Unix load is based on the number of processes
> waiting to
> >> run. BB multiplies the Unix "load average" value by 100 so that the
> >> integer arithmetic can be used.
> >>
> >> The best analogy I can think of is a bank. The Windows value would be
> >> equivalent to the proportion of time that a teller spends serving
> >> customers. The Unix value would be the average number of customers
> >> waiting in the queue.
> >>
> >> Cheers, Phil.
> >>
> >>
> >>
> >> --
> >> Weinberg's Principle: An expert is a person who avoids the small errors
> >> while sweeping on to the grand fallacy.
> >>
> >> --
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> -- 
> ---------------
>
> Chris Hoogendyk
>
> -
>    O__  ---- Systems Administrator
>   c/ /'_ --- Biology & Geology Departments
>  (*) \(*) -- 140 Morrill Science Center
> ~~~~~~~~~~ - University of Massachusetts, Amherst
>
> <hoogendyk@bio.umass.edu>
>
> ---------------
>
> Erdös 4
>

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