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mean_and_variance: Drop always failing tests

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mean_and_variance_test_2 and mean_and_variance_test_4 always fail.
The input parameters to those tests are identical to the input parameters
to tests 1 and 3, yet the expected result for tests 2 and 4 is different
for the mean and stddev tests. That will always fail.

     Expected mean_and_variance_get_mean(mv) == mean[i], but
        mean_and_variance_get_mean(mv) == 22 (0x16)
        mean[i] == 10 (0xa)

Drop the bad tests.

Fixes: 65bc41090720 ("mean and variance: More tests")
Closes: https://lore.kernel.org/lkml/065b94eb-6a24-4248-b7d7-d3212efb4787@roeck-us.net/
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Guenter Roeck 2024-02-25 08:29:25 -08:00 committed by Kent Overstreet
parent c42cd606e4
commit 97ca7c1f93
1 changed files with 1 additions and 27 deletions
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28
fs/bcachefs/mean_and_variance_test.c
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@ -136,20 +136,8 @@ static void mean_and_variance_test_1(struct kunit *test)
d, mean, stddev, weighted_mean, weighted_stddev);
}
static void mean_and_variance_test_2(struct kunit *test)
{
s64 d[] = { 100, 10, 10, 10, 10, 10, 10 };
s64 mean[] = { 10, 10, 10, 10, 10, 10, 10 };
s64 stddev[] = { 9, 9, 9, 9, 9, 9, 9 };
s64 weighted_mean[] = { 32, 27, 22, 19, 17, 15, 14 };
s64 weighted_stddev[] = { 38, 35, 31, 27, 24, 21, 18 };
do_mean_and_variance_test(test, 10, 6, ARRAY_SIZE(d), 2,
d, mean, stddev, weighted_mean, weighted_stddev);
}
/* Test behaviour where we switch from one steady state to another: */
static void mean_and_variance_test_3(struct kunit *test)
static void mean_and_variance_test_2(struct kunit *test)
{
s64 d[] = { 100, 100, 100, 100, 100 };
s64 mean[] = { 22, 32, 40, 46, 50 };
@ -161,18 +149,6 @@ static void mean_and_variance_test_3(struct kunit *test)
d, mean, stddev, weighted_mean, weighted_stddev);
}
static void mean_and_variance_test_4(struct kunit *test)
{
s64 d[] = { 100, 100, 100, 100, 100 };
s64 mean[] = { 10, 11, 12, 13, 14 };
s64 stddev[] = { 9, 13, 15, 17, 19 };
s64 weighted_mean[] = { 32, 49, 61, 71, 78 };
s64 weighted_stddev[] = { 38, 44, 44, 41, 38 };
do_mean_and_variance_test(test, 10, 6, ARRAY_SIZE(d), 2,
d, mean, stddev, weighted_mean, weighted_stddev);
}
static void mean_and_variance_fast_divpow2(struct kunit *test)
{
s64 i;
@ -230,8 +206,6 @@ static struct kunit_case mean_and_variance_test_cases[] = {
KUNIT_CASE(mean_and_variance_weighted_advanced_test),
KUNIT_CASE(mean_and_variance_test_1),
KUNIT_CASE(mean_and_variance_test_2),
KUNIT_CASE(mean_and_variance_test_3),
KUNIT_CASE(mean_and_variance_test_4),
{}
};