ns2 project in punjab
ns2 project in Punjab in the model, three principal times are associated to each
one of these activities: Waiting Time (the time between the
time-stamps of its ready and begin events), Service Time
(the time between the time-stamps of its ns2 project in punjab begin and end
events) and Response Time (the sum of Waiting and Service
Times). The behavioural model presented here is useful to represent
sequences of activities developed ns2 project in punjab in response to the
main input events which the PDES must deal with, and
so is useful for the analysis methodology to be presented.
These sequences are called end-to-end transactions or simply
transactions in the methodology. Construction of the ns2 project in punjab behavioural model implies a deep
understanding of another two models defined by the
methodology used in the development of the PDES: the
functional model, built from the ns2 project in punjab specifications, that represents
the main activities of the system to be developed, and
the structural model, that represents the ns2 project in punjab proposed design to
support the functionality. From these two models, all the
sequences of activities that conform the behavioural model
can be derived. The goal of the methodology is performance debugging
of PDES. To achieve this, the analysis of system behaviour
from the early design phase to its final implementationmust
be provided. Thus, the methodology involves the construction
of a synthetic prototype [15] of the PDES design, which
is analyzed and refined until fulfillment ns2 project in punjab of the timing constraints
is achieved.
The prototype also serves as a skeleton
for the implementation phase. In Figure 2 the integration of
the methodology in the PDES development cycle is shown.
Two refining cycles can be derived from the methodology;
one working with early designs ns2 project in punjab through prototypes of the
PDES, and the other with the implementation of the PDES.
The methodology approach can be resumed in the following steps:
1. Prototyping of the initial PDES design under analysis.
2. Understanding of the sequences of activities to be executed
as responses to input events (transactions), establishing
a specification of behaviour for them.
3. Instrumentation of the PDES software prototype to
enable the monitoring system to ns2 project in punjab obtain information
about the behaviour of transactions during the PDES
execution. 4. Execution of the instrumented PDES under specific
operational conditions (scenario) over a period of time
long enough to obtain a representative event trace.
5. Checking of the fulfillment of the real-time constraints
defined in the specification of behaviour for the PDES Development of a multi-level analysis in specific temporal
intervals (analysis windows) based on a set of
parameters and metrics derived from ns2 project in punjab the trace, and
combining structural, behavioural and resource views.
7. Identification of critical transactions which do not fulfill
their specifications of behaviour, and evaluation of
the incidence of a set of possible causes of the behaviour
observed in the PDES as a whole, the critical
transactions and the critical activities within them (diagnosis
of temporal behaviour). 8. Tuning of the system design according to the incidence
of each cause of behaviour, establishing a ns2 project in punjab suitable configuration
of the PDES. 9. Repetition of the analysis cycle until a final prototype,
which achieves fulfillment of the timing constraints
with minimum amount of resources, is obtained.
10. Implementation of PDES design and repetition of the
analysis cycle until its final implementation. The specification ns2 project in punjab of behaviour of the PDES consists of
specifications of the behaviour of ns2 project in punjab each transaction. These
specifications consider load characteristics and timing constraints
in transactions.