[sv-bc] FW: [sv-cc] my action item re: SV-CC schedule

fyi

________________________________

From: owner-sv-cc@server.eda.org [mailto:owner-sv-cc@server.eda.org] On
Behalf Of John Shields
Sent: Friday, December 21, 2007 8:13 PM
To: sv-cc@server.eda.org
Subject: [sv-cc] my action item re: SV-CC schedule


Hi,

I volunteered to write a statement asking for more time for SV-CC work.
Charlie expects that we will look it over next meeting, finalize it, and
then he will bring our request to the working group.  This is my take on
what we want and why:

SV-CC has reached an impasse in the area of how the information model
represents and accesses dynamic data and achieving the right balance
between functionality and performance. Given the current schedule
constraints we are faced with a specification in this area that either
will not be adequate for users, or one with no consensus and that will
undoubtedly be a ballot issue for the LRM.  On the other hand, there is
agreement that this is a very important area to get right and we have
the willingness to work on the information model to better represent
dynamic data and deal with its lifetime.

We are requesting until the end of March to complete this work.  

Having long sought a compromise between backward compatibility with the
pre-SV information model and extension to SV dynamic data types, we have
come to the conclusion that we need to focus on a more faithful
representation in the information model.  We have to enable applications
like debugging and design browsing.  The validity of PLI handles and
their interaction with the lifetime of dynamic data are also a concern.
There is a balance we seek between good performance of the simulator on
the model in the presence of PLI, acceptable performance of PLI
applications, and safety considerations.  We may even need PLI
applications that participate in the testbench (or other aspects of the
model) where dynamic data is used in which PLI affects object lifetime.
What we have clearly recognized is the amount of attention yet required
and importance of doing it right.  We need the time.

Regards,
John Shields
Mentor Graphics

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