C H A P T E R 13 - Floating Point Unit Test (fputest)

C H A P T E R 13

Floating Point Unit Test (fputest)

The fputest checks the functionality of the floating point unit in a Sun SPARC based CPU. The test verifies the functionality by various arithmetic operations. In addition, the fputest stresses the CPU with the use of benchmarks. Both single and double precision numbers are used for the operations.

When fputest is chosen in Exclusive test mode from the SunVTS graphical user interface, it may run multiple instances in parallel on different CPUs. The number of such instances that may be running in parallel at the same time is dynamically determined depending on system resources.

`fputest` Subtests

Instruction tests:

FSR Register test
Registers test
NACK test
Move Registers test
Positive to Negative test
Negative to Positive test
Absolute test
Single-Precision Integer to Floating Point test
Double-Precision Integer to Floating Point test
Single-Precision Floating Point to Integer test
Double-Precision Floating Point to Integer test
Single-Precision Round Toward Zero test
Double-Precision Round Toward Zero test
Single to Double-Precision Format Conversion test
Double to Single-Precision Format Conversion test
Single and Double-Precision Addition, Subtraction, Multiplication, Square-root, Division, and Compare tests
Single and Double-Precision Compare and Exception if Unordered tests
Branching and No Branching on Condition Instructions tests
Single and Double-Precision Chaining tests
Weitek Status tests
Lock test
Single and Double-Precision Datapath tests
Timing (load) test

Benchmark tests:

Linpack test
Cparanoia test
Kcsqrt test
Kcdiv test
Clorenz test
Cvector test

`fputest` Options

To reach the dialog box below, right-click on the test name in the System Map and select Test Parameter Options. If you do not see this test in the System Map, you might need to expand the collapsed groups, or your system may not include the device appropriate to this test. Refer to the SunVTS User's Guide for more details.

FIGURE 13-1 fputest Test Parameter Options Dialog Box

Screenshot of the fputest Test Parameter Options dialog box.

Note - It is not advisable to use the Processor Affinity option for this test. Doing so reduces the effectiveness of the test.

`fputest` Test Modes

TABLE 13-1 `fputest` Supported Test Modes
Test Mode	Description
Connection	Includes all the instruction tests.
Functional (Offline)	Performs all the instruction tests and all the benchmark tests.
Stress mode	Performs several `fpu` benchmark tests.

`fputest` Command-Line Syntax

/opt/SUNWvts/bin/fputest [-scruvdtlxnf] [-p n] [-i n] [-w n] [-o dev=cpu-unitN]

Note - Options -s, -p, -i, and -w are not applicable when tests are invoked from the command line.

TABLE 13-2 `fputest` Command-Line Syntax
Argument	Description
`-s`	Enables SunVTS mode
`-c`	Enables core file
`-r`	Enables run on error
`-u`	Enables list usage
`-v`	Enables verbose mode
`-d`	Enables debug mode
`-t`	Enables test function trace mode
`-l`	Enables online mode
`-x`	Enables exlusive mode
`-n`	Enables connectivity mode
`-f`	Enables offline mode
-p n	n specifies the number of passes. The default is 1.
`-i` n	n specifies the number of total instances for the test. The default is 1.
`-w` n	n specifies which instance this test is assignes. The default is 0.
`-o`	Enables test specific command arguments
`dev=cpu-unit`N	Specifies the CPU unit to be tested. N specifies the numeric ID of online CPU.

Usage Examples:

Note - When using fputest specific arguments the -o AND dev options are required.

To execute exclusive fputest with verbose messages against CPU 72, use the following syntax:

# /opt/SUNWvts/bin/fputest -xvo dev=cpu-unit72

To execute functional fputest with verbose messages against CPU 3, use the following syntax:

# /opt/SUNWvts/bin/fputest -fvo dev=cpu-unit3

Note - 64-bit tests are located in the sparcv9 subdirectory: /opt/SUNWvts/bin/sparcv9/testname. If a test is not present in this directory, then it may only be available as a 32-bit test. For more information refer to the "32-Bit and 64-Bit Tests" section of the SunVTS 5.1 Test Reference Manual (816-5145-10).

fputest Subtests

fputest Options

fputest Test Modes

fputest Command-Line Syntax

`fputest` Subtests

`fputest` Options

`fputest` Test Modes

`fputest` Command-Line Syntax