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CONFIG_TEST_DHRY: Dhrystone benchmark test

General informations

The Linux kernel configuration item CONFIG_TEST_DHRY:

Help text

Enable this to include the Dhrystone 2.1 benchmark. This test calculates the number of Dhrystones per second, and the number of DMIPS (Dhrystone MIPS) obtained when the Dhrystone score is divided by 1757 (the number of Dhrystones per second obtained on the VAX 11/780, nominally a 1 MIPS machine).

To run the benchmark, it needs to be enabled explicitly, either from the kernel command line (when built-in), or from userspace (when built-in or modular.

Run once during kernel boot:

test_dhry.run

Set number of iterations from kernel command line:

test_dhry.iterations=<n>

Set number of iterations from userspace:

echo <n> > /sys/module/test_dhry/parameters/iterations

Trigger manual run from userspace:

echo y > /sys/module/test_dhry/parameters/run

If the number of iterations is <= 0, the test will devise a suitable number of iterations (test runs for at least 2s) automatically. This process takes ca. 4s.

If unsure, say N.

Hardware

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