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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include "format-util.h"
#include "limits-util.h"
#include "tests.h"
TEST(physical_memory) {
uint64_t p;
p = physical_memory();
assert_se(p > 0);
assert_se(p < UINT64_MAX);
assert_se(p % page_size() == 0);
log_info("Memory: %s (%" PRIu64 ")", FORMAT_BYTES(p), p);
}
TEST(physical_memory_scale) {
uint64_t p;
p = physical_memory();
assert_se(physical_memory_scale(0, 100) == 0);
assert_se(physical_memory_scale(100, 100) == p);
log_info("Memory original: %" PRIu64, physical_memory());
log_info("Memory scaled by 50%%: %" PRIu64, physical_memory_scale(50, 100));
log_info("Memory divided by 2: %" PRIu64, physical_memory() / 2);
log_info("Page size: %zu", page_size());
/* There might be an uneven number of pages, hence permit these calculations to be half a page off... */
assert_se(page_size()/2 + physical_memory_scale(50, 100) - p/2 <= page_size());
assert_se(physical_memory_scale(200, 100) == p*2);
assert_se(physical_memory_scale(0, 1) == 0);
assert_se(physical_memory_scale(1, 1) == p);
assert_se(physical_memory_scale(2, 1) == p*2);
assert_se(physical_memory_scale(0, 2) == 0);
assert_se(page_size()/2 + physical_memory_scale(1, 2) - p/2 <= page_size());
assert_se(physical_memory_scale(2, 2) == p);
assert_se(physical_memory_scale(4, 2) == p*2);
assert_se(physical_memory_scale(0, UINT32_MAX) == 0);
assert_se(physical_memory_scale(UINT32_MAX, UINT32_MAX) == p);
/* overflow */
assert_se(physical_memory_scale(UINT64_MAX/4, UINT64_MAX) == UINT64_MAX);
}
TEST(system_tasks_max) {
uint64_t t;
t = system_tasks_max();
assert_se(t > 0);
assert_se(t < UINT64_MAX);
log_info("Max tasks: %" PRIu64, t);
}
TEST(system_tasks_max_scale) {
uint64_t t;
t = system_tasks_max();
assert_se(system_tasks_max_scale(0, 100) == 0);
assert_se(system_tasks_max_scale(100, 100) == t);
assert_se(system_tasks_max_scale(0, 1) == 0);
assert_se(system_tasks_max_scale(1, 1) == t);
assert_se(system_tasks_max_scale(2, 1) == 2*t);
assert_se(system_tasks_max_scale(0, 2) == 0);
assert_se(system_tasks_max_scale(1, 2) == t/2);
assert_se(system_tasks_max_scale(2, 2) == t);
assert_se(system_tasks_max_scale(3, 2) == (3*t)/2);
assert_se(system_tasks_max_scale(4, 2) == t*2);
assert_se(system_tasks_max_scale(0, UINT32_MAX) == 0);
assert_se(system_tasks_max_scale((UINT32_MAX-1)/2, UINT32_MAX-1) == t/2);
assert_se(system_tasks_max_scale(UINT32_MAX, UINT32_MAX) == t);
/* overflow */
assert_se(system_tasks_max_scale(UINT64_MAX/4, UINT64_MAX) == UINT64_MAX);
}
DEFINE_TEST_MAIN(LOG_INFO);
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