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| author | Maciej W. Rozycki <macro@orcam.me.uk> | 2021-04-20 04:50:28 +0200 |
|---|---|---|
| committer | Thomas Bogendoerfer <tsbogend@alpha.franken.de> | 2021-04-21 13:45:36 +0200 |
| commit | 5086ea4b0f58ba72c19553c4a657d7b2c0d8efc2 (patch) | |
| tree | fd16d2051b765f90f03bf75f779cd2340cc29ea8 /lib/Kconfig.debug | |
| parent | 1b6bc35a01bd6b874165379255929b7badfdecb5 (diff) | |
| download | linux-5086ea4b0f58ba72c19553c4a657d7b2c0d8efc2.tar.bz2 | |
lib/math: Add a `do_div' test module
Implement a module for correctness and performance evaluation for the
`do_div' function, often handled in an optimised manner by platform
code. Use a somewhat randomly generated set of inputs that is supposed
to be representative, using the same set of divisors twice, expressed as
a constant and as a variable each, so as to verify the implementation
for both cases should they be handled by different code execution paths.
Reference results were produced with GNU bc.
At the conclusion output the total execution time elapsed.
Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Diffstat (limited to 'lib/Kconfig.debug')
| -rw-r--r-- | lib/Kconfig.debug | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 2779c29d9981..b6e7f50d984f 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -2027,6 +2027,16 @@ config TEST_SORT If unsure, say N. +config TEST_DIV64 + tristate "64bit/32bit division and modulo test" + depends on DEBUG_KERNEL || m + help + Enable this to turn on 'do_div()' function test. This test is + executed only once during system boot (so affects only boot time), + or at module load time. + + If unsure, say N. + config KPROBES_SANITY_TEST bool "Kprobes sanity tests" depends on DEBUG_KERNEL |