Mentor v8.6_4 manual Set Fault Sampling, ∙ percentage, ∙ -Seedinteger

Set Fault Sampling Command Dictionary

Set Fault Sampling

Tools Supported: FlexTest

Scope: All modes

Usage

SET FAult Sampling percentage [-Seed integer]

Description

Specifies the fault sampling percentage.

The Set Fault Sampling command specifies the fault sampling percentage that FlexTest uses for circuit evaluation. The default upon invocation of the tool is to process all faults (100%).

Fault sampling allows you to process a fraction of the total faults and thus decrease process time when you need to evaluate a large circuit. Once you specify a percentage, the tool randomly picks the fault samples to process.

Arguments

∙percentage

A required positive integer from 1 to 100 that specifies the fault sampling percentage that you want FlexTest to use for circuit evaluation. The invocation default is 100 percent.

∙-Seedinteger

Specifies a seed to be used in the selection of fault sampling. Specifying unique seed values for different runs can give more accurate results when using fault sampling. The integer must be in lower case 32-bit hex representation. The initial default is 0xcccccccc. Since the random number generator is implemented by a linear feedback shift register, 0 is not a possible value for integer. If the -Seed option is not used, the previously specified seed will be used.

Examples

The following example performs an ATPG run using a fault sampling of 50 percent of the total faults:

2-480 FastScan and FlexTest Reference Manual, V8.6_4