Chapter 34 Level 2 Cache Test (l2dcachetest)

l2dcachetest exercises the level2 external cache in the CPU module of a Sun machine. The test writes, reads, and verifies access of multiple virtual addresses.The multiple virtual addresses are chosen to cause thrashing (cache misses) in direct-mapped external caches.

l2dcachetest 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 34-1 l2dcachetest Test Parameter Options Dialog Box

Table 34-1 l2dcachetest Options

Option	Description
Thrash Cycles	Specifies the number of thrashing cycles the test completes for the level2 cache on the system. Default value for Offline mode is 8.
Test Buffer Size	Sets the size of the buffer, in kbytes, that the test allocates for testing. Default value is 8192.

l2dcachetest Test Modes

Table 34-2 l2dcachetest Test Modes

Test Mode	Supported?	Description
Connection	No	Not supported.
Functional  (Offline)	Yes	Runs the full test.

l2dcachetest Command-Line Syntax

/opt/SUNWvts/bin/l2dcache standard_arguments -o count=number,buffer=number,dev=l2dcache

Table 34-3 l2dcachetest Command-Line Syntax

Argument	Description
count=number	Specifies the number of thrashing cycles the test completes for the level2 cache on the system. Default value for Offline mode is 8.
buffer=number	Sets the size of the buffer, in kbytes, that the test allocates for testing. Default value is 8192.
dev=l2dcache	Specifies the name of the device.