[Disksim-users] Response Time and Access Time

[mauricxe at netscape.net]

Thanks
 


 

 

-----Original Message-----
From: Greg Ganger <ganger at ece.cmu.edu>
To: mauricxe at netscape.net
Cc: disksim-users at ece.cmu.edu; Greg Ganger <ganger at ece.cmu.edu>
Sent: Sun, Mar 21, 2010 7:51 pm
Subject: Re: [Disksim-users] Response Time and Access Time


It depends on which component you are looking at... those two metrics 
are captured at every "level" of a configuration (disk, controller, 
device driver).  In each case, the latter includes queue time and 
the former does not. 
 
Greg 
 
On Sun, 21 Mar 2010, mauricxe at netscape.net wrote: 
 
> 
> Hello all, 
> 
> I have a question about two of the numbers reported by Disksim at the end of a simulation. 
> 
> Is my understanding of the following two metrics accurate?  If not, could you supplement my definition or point out what I am missing? 
> 
> 
> Access Time- Is this determined by a sum of the spin-up time, seek time, rotational delay, and transfer time? 
> 
> Response Time-The amount of time it takes to issue the request and to receive the results.  This would also include Queue time. 
> 
> Is my understanding of these two accurate? 
> 
> Thanks!!!! 
> 
> 
> 
> 
> 

 
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