Detection of partially simultaneously alive signals in storage requirement estimation for d.pdf
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Detection of partially simultaneously alive signals in storage requirement estimation for d
Detection of Partially Simultaneously Alive Signals in Storage
Requirement Estimation for Data Intensive Applications
Per Gunnar Kjeldsberg
Norwegian University of Science and
Technology
Trondheim, Norway
pgk@fysel.ntnu.no
Francky Catthoor
IMEC, Leuven, Belgium
Also at EE.Dept. of Kath. Univ. Leuven
catthoor@imec.be
Einar J. Aas
Norwegian University of Science and
Technology
Trondheim, Norway
einar.aas@fysel.ntnu.no
ABSTRACT
In this paper, we propose a novel storage requirement estimation
methodology for use in the early system design phases when the
data transfer ordering is only partially fixed. At that stage, none of
the existing estimation tools are adequate, as they either assume a
fully specified execution order or ignore it completely. Using rep-
resentative application demonstrators, we show how our technique
can effectively guide the designer to achieve a transformed specifi-
cation with low storage requirement.
1. INTRODUCTION
Many integrated circuit systems, particularly in the multi-media
and telecom domains, are inherently data dominant. For this class
of applications, data transfer and storage largely determine cost
and performance parameters. This is the case for chip size, since
large memories are usually needed, performance, since accessing
the memories may very well be the main bottleneck, and power
consumption, since the memories and buses consume large quanti-
ties of energy. Even for systems with caches, the overall storage
requirement has vital impact on the performance and power con-
sumption, since it greatly influences the number of slow and power
expensive cache misses. For the system development process, the
designer must hence concentrate first on exploring the data transfer
and storage to achieve a cost optimized end product [4]. At the
system level, no detailed information is available about the size of
the memories required for storing data in the alternative realiza-
tions of the application. To
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