Issue 5989: Performance Profile Loads need tags for throughput (uml-scheduling-rtf)
Source: Carleton University (Dr. Murray Woodside, cmw(at)sce.carleton.ca)
Nature: Uncategorized Issue
Severity: 
Summary: The PAclosedLoad and PAopenLoad stereotypes should both have tags for
throughput 
in [responses/unit_time]. The PAresource stereotype has already a
PAthroughput tag 
of type Real, so this would be suitable. 


A more appropriate type for Throughput would be desirable.


        - PAperfValue is suitable for describing delay, and time between
events, but 
not a rate.
        
        - RTarrivalPattern type is good for describing event sequences, but
it 
assumes that the event pattern is imposed on the system. Throughput is
usually a 
result, and often we don't know its pattern but only the mean rate.
        
        - A full treatment of throughput might have to treat traffic
variability and 
self-similarity!!

Resolution: 
Revised Text: 
Actions taken:
July 3, 2003: received issue
Discussion: 
This seems to require a new feature, hence a new RFP
End of Annotations:=====
From: "Moore, Alan" <AlanM@artisansw.com> 
To: "Juergen Boldt (E-mail)" <juergen@omg.org> 
Subject: Issues with SPT 
Date: Thu, 3 Jul 2003 09:30:24 +0100 
X-Mailer: Internet Mail Service (5.5.2653.19) 


Hi Juergen,



Can you raise the following four issues against the Profile for
Schedulability, Performance and Time.



3. Title: Performance Profile Loads need tags for throughput


Source: Murray Woodside and Dorina Petriu


The PAclosedLoad and PAopenLoad stereotypes should both have tags for
throughput 
in [responses/unit_time]. The PAresource stereotype has already a
PAthroughput tag 
of type Real, so this would be suitable. 


A more appropriate type for Throughput would be desirable.


        - PAperfValue is suitable for describing delay, and time between
events, but 
not a rate.
        
        - RTarrivalPattern type is good for describing event sequences, but
it 
assumes that the event pattern is imposed on the system. Throughput is
usually a 
result, and often we don't know its pattern but only the mean rate.
        
        - A full treatment of throughput might have to treat traffic
variability and 
self-similarity!!