Scalability of Tests

Use the scalability feature to scale the number of test instances or processes to stress single or multiprocessor systems. You can modify the scalable test options so that each test instance runs simultaneously with a different option. Combined with the processor affinity mask, SunVTS provides a flexible testing environment. You can determine the amount of stress by the number of test instances you select using the options described below.

• Group Concurrency--sets the maximum number of tests you want to run at the same time in the same group. This option is available in the top level and group level Schedule options menu.

• System Concurrency--sets the maximum number of tests that you can run at the same time in the entire system; it overrides the Group Concurrency option. this option is available in the top level Schedule options menu.

• Instances--copies of a test that you can run simultaneously on the same device. For example, if a test has eight instances, then you can run eight copies of that test, and each copy can run on either one or all of the processors in the test system (see "Processor Affinity" below). You can set the number of instances with the Number of Instances option (this option only applies to scalable tests). This option is available in some test level Test Parameter option menus.

• Processor Affinity--lets you specify the processor on which you want to run the tests; it is only available on multiprocessor systems. Each instance of the test can have a different Processor Affinity. Only one processor can be bound to an instance of the test. When no Processor Affinity is specified, migrating is the default. This option is available in some test level Test Parameter option menus.