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On slow systems, the rtc unit test may result in soft lockups and/or generate messages such as # rtc_time64_to_tm_test_date_range: Test should be marked slow (runtime: 34.253230015s) # rtc_time64_to_tm_test_date_range: pass:1 fail:0 skip:0 total:1 The test covers a date range of 160,000 years, resulting in the long runtime. Unit tests running for more than 1 second are supposed to be marked as slow. Just marking the test as slow would prevent it from running when slow tests are disabled, which would not be desirable. At the same time, the current test range of 160,000 years seems to be of limited value. Split the test into two parts, one covering a range of 1,000 years and the other covering the current range of 160,000 years. Mark the 160,000 year test as slow to be able to separate it from the faster test. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Link: https://lore.kernel.org/r/20240313174221.1999654-1-linux@roeck-us.net Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
101 lines
2.2 KiB
C
101 lines
2.2 KiB
C
// SPDX-License-Identifier: LGPL-2.1+
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#include <kunit/test.h>
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#include <linux/rtc.h>
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/*
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* Advance a date by one day.
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*/
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static void advance_date(int *year, int *month, int *mday, int *yday)
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{
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if (*mday != rtc_month_days(*month - 1, *year)) {
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++*mday;
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++*yday;
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return;
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}
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*mday = 1;
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if (*month != 12) {
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++*month;
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++*yday;
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return;
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}
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*month = 1;
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*yday = 1;
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++*year;
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}
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/*
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* Check every day in specified number of years interval starting on 1970-01-01
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* against the expected result.
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*/
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static void rtc_time64_to_tm_test_date_range(struct kunit *test, int years)
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{
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/*
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* years = (years / 400) * 400 years
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* = (years / 400) * 146097 days
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* = (years / 400) * 146097 * 86400 seconds
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*/
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time64_t total_secs = ((time64_t)years) / 400 * 146097 * 86400;
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int year = 1970;
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int month = 1;
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int mday = 1;
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int yday = 1;
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struct rtc_time result;
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time64_t secs;
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s64 days;
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for (secs = 0; secs <= total_secs; secs += 86400) {
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rtc_time64_to_tm(secs, &result);
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days = div_s64(secs, 86400);
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#define FAIL_MSG "%d/%02d/%02d (%2d) : %lld", \
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year, month, mday, yday, days
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KUNIT_ASSERT_EQ_MSG(test, year - 1900, result.tm_year, FAIL_MSG);
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KUNIT_ASSERT_EQ_MSG(test, month - 1, result.tm_mon, FAIL_MSG);
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KUNIT_ASSERT_EQ_MSG(test, mday, result.tm_mday, FAIL_MSG);
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KUNIT_ASSERT_EQ_MSG(test, yday, result.tm_yday, FAIL_MSG);
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advance_date(&year, &month, &mday, &yday);
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}
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}
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/*
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* Checks every day in a 160000 years interval starting on 1970-01-01
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* against the expected result.
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*/
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static void rtc_time64_to_tm_test_date_range_160000(struct kunit *test)
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{
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rtc_time64_to_tm_test_date_range(test, 160000);
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}
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/*
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* Checks every day in a 1000 years interval starting on 1970-01-01
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* against the expected result.
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*/
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static void rtc_time64_to_tm_test_date_range_1000(struct kunit *test)
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{
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rtc_time64_to_tm_test_date_range(test, 1000);
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}
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static struct kunit_case rtc_lib_test_cases[] = {
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KUNIT_CASE(rtc_time64_to_tm_test_date_range_1000),
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KUNIT_CASE_SLOW(rtc_time64_to_tm_test_date_range_160000),
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{}
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};
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static struct kunit_suite rtc_lib_test_suite = {
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.name = "rtc_lib_test_cases",
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.test_cases = rtc_lib_test_cases,
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};
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kunit_test_suite(rtc_lib_test_suite);
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MODULE_LICENSE("GPL");
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