ns2 project in tamil nadu
ns2 project in tamil nadu the PDES window is obtained from the PDES basic period
Tpdes, which corresponds to the Least Common Multiple
(LCM) of all the periods Ti specified for the periodic
transactions, as seen in Figure 5. This approach was also ns2 project in tamil nadu
used in [14] and [3]. The first PDES period in the execution
must be considered as PDES window ns2 project in tamil nadu if the transient
behaviour caused by pipelining [3] is being analyzed. On
the other hand, to analyze the permanent behaviour, several
PDES basic periods, starting with the second, must be considered
in the PDES window. The number of PDES basic periods in the PDES window increase with the variability of
the response times in the transactions and the mean activation period of the aperiodic transactions Parameters represent all the known information about
the PDES before execution. So, while they give only a
static view of the system, they are necessary to determine
the influence of the design components ns2 project in tamil nadu on the behaviour of
the system. Four kinds of parameters are considered in the
methodology: load parameters, parameters of the structural
model, parameters of the behavioural model, ns2 project in tamil nadu and parameters
of connection between models. Load parameters define the demands of service on the
system from the environment, and reflect ns2 project in tamil nadu the load characteristics
of transactions in the PDES behavioural model.
The structural model defines the current design of the
PDES and considers components on four ns2 project in tamil nadu levels or layers:
the whole PDES, processors, tasks (scheduling units) and
blocks. execution of activities. The behavioural model, on the other
hand, considers components on three levels: the PDES as a
whole, transactions and activities. Figure 6 shows the levels
considered in each model and the relationships between
The parameters of the structural and behavioural models
represent mapping relationships between their components
in the levels of the corresponding model. Finally, the ns2 project in tamil nadu parameters
of connection between the models establish the
mapping of activities in blocks, providing the basis with
which to relate both models. Metrics are the criteria to explain the behaviour observed
in the system. They can be simple measurements obtained
from the event trace, relationships between the measurements
and the parameters, resource utilization ns2 project in tamil nadu or special indexes.
Metrics provide information which feed the models
corresponding to both the behavioural and resource views.
The metrics used in this methodology can be classified
according to the level of analysis in which they are applied.
So, three different levels can be distinguished: PDES level
metrics, transaction level metrics and ns2 project in tamil nadu activity level metrics.
For a specific level of analysis and a specific view, the
metrics can be calculated using all three analysis windows,
that is the PDES window (Wpdes), the transaction window
(Wtra) and the activity window (Wact). Three special indexes correspond to important metrics in
the resource view. The Index of blocking (Ib) helps to identify
the cause of blocking time in an activity. This index ns2 project in tamil nadu
compares the activity response time with the transaction period,
in order to establish if the blocking time is caused by
execution overlapping of transaction ns2 project in tamil nadu instances. Therefore,
index values over 1 indicate overlapping. The Index of parallelism
(Ip) provides information about the level of concurrence
of activities executed in parallel within a transaction
instance.