Processor Specification--Detail Tab

Figure 91 Processor Specification--Detail Tab

Refer to the descriptions in the Introduction to Specifications chapter for information on the specification elements not covered in the following section.

Characteristics

Use the Characteristics field to specify a physical description of an element. For example, you can describe the kind and bandwidth of a connection; the manufacturer, model, memory, and disks of a machine; or the kind and size of a device. You can set this field only through the specification. This information is not displayed in the deployment diagram.

To update this field, click the Characteristics field and enter the information.

Processes

Use this field to identify the processes assigned to this processor. Processes denote either the root of a main program from a component diagram or the name of an active object from a collaboration diagram.

To create a process, right-click in the processes area and click Insert from the shortcut menu. A new process entry is created. To change the name or priority, click the item and type the changes.

You can display a list of the processes by selecting the processor icon and clicking Show Processes from the shortcut menu.

Scheduling

The Scheduling field specifies the type of process scheduling used by the processor. Use these options to specify the appropriate scheduling.

Table 16 Scheduling Field Options

Type	Description
Preemptive (default)	Higher-priority processes that are ready to execute can preempt lower-priority processes that are currently executing. Processes with equal priority are given a time slice in which to execute, allowing computation resources to be fairly distributed.
Non preemptive	The current process continues to execute until it relinquishes control.
Cyclic	Control passes from one process to another; each process is given a fixed amount of processing time.
Executive	An algorithm controls process scheduling.
Manual	Processes are scheduled by a user outside of the system.

You can set this field only through the specification. To set the scheduling type, click the applicable option button in the Scheduling field.

You can display the scheduling type in the processor icon by clicking Show Scheduling from the shortcut menu.

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Device Specification

A Device Specification displays and modifies the properties and relationships of a device in the current model. Some of the information on this specification can also be displayed inside icons representing the device in a deployment diagram.

To display a Device Specification, double-click any icon representing a device, or click Browse > Specifications.

Specification Content

The Device Specification consists of the following tabs: General and Detail.