[P1800] Request for additional time

Hi P1800,

As Chair of the SV-CC, I have been directed to forward the following
request for additional time to our current schedule.

   -Chas

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 VPI 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 VPI, acceptable performance of VPI
applications, and safety considerations.  We may even need VPI
applications that participate in the testbench (or other aspects of the
model) where dynamic data is used in which VPI 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.

-- 
Charles Dawson
Senior Engineering Manager
NC-Verilog Team
Cadence Design Systems, Inc.
270 Billerica Road
Chelmsford, MA  01824
(978) 262 - 6273
chas@cadence.com


-- 
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.