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/*
* Copyright (C) 2025 Codership Oy <info@codership.com>
*
* $Id$
*/
#define GCACHE_UNIT_TEST
#define GCACHE_PAGE_STORE_UNIT_TEST
#include "GCache.hpp"
#include "gcache_limits.hpp"
#include "gcache_top_test.hpp"
#include <vector>
#include <gu_inttypes.hpp>
using namespace gcache;
static int const DEBUG = 4;
static void
test_caching_fill_page(gcache::GCache& gc,
std::vector<void*>& buf,
size_t const expected_page_count)
{
const PageStore& ps(gc.page_store());
for (int i(0); i < 3; i++)
{
buf.push_back(gc.malloc(1));
void* const ptr(buf[buf.size() - 1]);
ck_assert(nullptr != ptr);
ck_assert(SEQNO_NONE == ptr2BH(ptr)->seqno_g);
ck_assert_msg(ps.count() == expected_page_count,
"%d. buf = %zu, ps.count() = %zu (expected %zu)",
i, buf.size()-1, ps.count(), expected_page_count);
}
}
START_TEST(top_level_page_caching) // test that caching in pages work
{
log_info << "\n#\n# top_level_page_caching\n#";
const char* const dir_name = "";
size_t const bh_size = sizeof(gcache::BufferHeader);
size_t const page_size = (8 + bh_size)*3; // fits 3 buffers <= 8 bytes
size_t const keep_size = 2*page_size; // keep at least 2 pages
gu::Config cfg;
GCache::register_params(cfg);
cfg.set("gcache.dir", dir_name);
cfg.set("gcache.size", 0); // turn off ring buffer
cfg.set("gcache.page_size", page_size);
cfg.set("gcache.keep_pages_size", keep_size);
#ifndef NDEBUG
cfg.set("gcache.debug", DEBUG);
#endif
GCache gc(nullptr, cfg, dir_name);
const seqno2ptr_t& sm(gc.seqno_map());
const PageStore& ps(gc.page_store());
ck_assert_msg(ps.page_size() == page_size,
"ps.page_size: %zu (expected %zu)",
ps.page_size(), page_size);
std::vector<void*> buf;
mark_point();
/*
* 1. Populate 6 pages
*/
for (size_t page_count(1); page_count <= 6; page_count++)
test_caching_fill_page(gc, buf, page_count);
ck_assert_msg(ps.total_pages() == 6,
"total_pages %zu (expected 6)", ps.total_pages());
/*
* 2. Free some "unused" buffers and assign seqnos out of order to others
*/
gc.free(buf[0]);
gc.free(buf[1]);
gc.free(buf[2]);
ps.wait_page_discard(); // 1st page should go
ck_assert_msg(ps.total_pages() == 5,
"total_pages %zu (expected 5)", ps.total_pages());
ck_assert_msg(gc.seqno_min() == -1,
"seqno_min: %" PRId64 " (expected -1)", gc.seqno_min());
gc.free(buf[3]);
gc.seqno_assign(buf[4], 1, 0, false); gc.seqno_release(1);
ck_assert(gc.seqno_min() == 1);
gc.free(buf[5]);
ps.wait_page_discard(); // 2nd page should go
ck_assert_msg(ps.total_pages() == 4,
"total_pages %zu (expected 4)", ps.total_pages());
if (!sm.empty())
{
ck_assert_msg(sm.empty() == true,
"SM size: %zu, begin: %" PRId64 ", end: %" PRId64
", front: %p, back: %p"
,sm.size(), sm.index_begin(), sm.index_end()
,sm.front(), sm.back()
);
}
ck_assert_msg(gc.seqno_min() == -1,
"seqno_min: %" PRId64 " (expected -1)", gc.seqno_min());
gc.free(buf[6]);
gc.seqno_assign(buf[7], 4, 0, false); // this should pin the page
gc.free(buf[8]);
ck_assert_msg(gc.seqno_min() == 4,
"seqno_min: %" PRId64 " (expected 4)", gc.seqno_min());
ck_assert_msg(ps.total_pages() == 4,
"total_pages %zu (expected 4)", ps.total_pages());
gc.free(buf[9]);
gc.seqno_assign(buf[11], 2, 0, false); gc.seqno_release(2);
ck_assert(gc.seqno_min() == 2);
gc.seqno_assign(buf[10], 3, 0, false); gc.seqno_release(3);
// page 3 should stay since seqno 4 is not released, and therefore page 4
ps.wait_page_discard();
ck_assert(gc.seqno_min() == 2);
ck_assert_msg(ps.total_pages() == 4,
"total_pages %zu (expected 4)", ps.total_pages());
gc.seqno_release(4);
// only after releasing seqno 4 all other buffers and pages 3 and 4 may go
ps.wait_page_discard();
ck_assert_msg(ps.total_pages() == 2,
"total_pages %zu (expected 2)", ps.total_pages());
ck_assert(gc.seqno_min() == -1);
/*
* 3. Test that the last 2 pages will remain even after freeing
*/
gc.free(buf[12]);
gc.seqno_assign(buf[13], 5, 0, false);
gc.seqno_assign(buf[14], 6, 0, false);
ck_assert(gc.seqno_min() == 5);
gc.seqno_assign(buf[15], 7, 0, false);
gc.seqno_assign(buf[16], 8, 0, false);
gc.seqno_release(8); // releases all previous seqnos as well
gc.free(buf[17]);
ps.wait_page_discard();
ck_assert(gc.seqno_min() == 5);
ck_assert_msg(ps.total_pages() == 2,
"total_pages %zu (expected 2)", ps.total_pages());
buf.push_back(gc.malloc(1));
// this shall allocate one more page and page 5 should go,
// only 6 and 7 should remain
ck_assert(ps.count() == 7);
ps.wait_page_discard();
ck_assert_msg(ps.total_pages() == 2,
"total_pages %zu (expected 2)", ps.total_pages());
ck_assert(gc.seqno_min() == 7);
for (size_t i(18); i < buf.size(); i++)
{
gc.free(buf[i]);
}
mark_point();
}
END_TEST
START_TEST(top_level_page_caching_locking) // test that caching in pages work
{
log_info << "\n#\n# top_level_page_caching_locking\n#";
const char* const dir_name = "";
size_t const bh_size = sizeof(gcache::BufferHeader);
size_t const page_size = (8 + bh_size)*3; // fits 3 buffers <= 8 bytes
size_t const keep_size = 2*page_size; // keep at least 2 pages
gu::Config cfg;
GCache::register_params(cfg);
cfg.set("gcache.dir", dir_name);
cfg.set("gcache.size", 0); // turn off ring buffer
cfg.set("gcache.page_size", page_size);
cfg.set("gcache.keep_pages_size", keep_size);
#ifndef NDEBUG
cfg.set("gcache.debug", DEBUG);
#endif
GCache gc(nullptr, cfg, dir_name);
const PageStore& ps(gc.page_store());
ck_assert_msg(ps.page_size() == page_size,
"ps.page_size: %zu (expected %zu)",
ps.page_size(), page_size);
std::vector<void*> buf;
mark_point();
/*
* 1. Populate 5 pages
*/
for (size_t page_count(1); page_count <= 5; page_count++)
test_caching_fill_page(gc, buf, page_count);
ck_assert_msg(ps.total_pages() == 5,
"total_pages %zu (expected 5)", ps.total_pages());
/*
* 2. Assign seqnos
*/
for (size_t seqno(1); seqno <= buf.size(); seqno++)
gc.seqno_assign(buf[seqno - 1], seqno, 0, false);
ck_assert(gc.seqno_min() == 1);
/*
* 3. Lock seqno 5, it should hold page 2
*/
gc.seqno_lock(5);
gc.seqno_release(1);
gc.seqno_release(2);
ps.wait_page_discard();
ck_assert_msg(ps.total_pages() == 5,
"total_pages %zu (expected 5)", ps.total_pages());
ck_assert_msg(gc.seqno_min() == 1,
"seqno_min: %" PRId64 " (expected 1)", gc.seqno_min());
gc.seqno_release(3);
ps.wait_page_discard(); // page 1 should go
ck_assert_msg(ps.total_pages() == 4,
"total_pages %zu (expected 4)", ps.total_pages());
ck_assert_msg(gc.seqno_min() == 4,
"seqno_min: %" PRId64 " (expected 4)", gc.seqno_min());
try {
gc.seqno_lock(3);
ck_abort_msg("Should fail.");
} catch (gu::NotFound&) {}
gc.seqno_release(6); // batch-releases all seqnos <= 6
ps.wait_page_discard(); // page 2 should be held by a lock
ck_assert_msg(ps.total_pages() == 4,
"total_pages %zu (expected 5)", ps.total_pages());
ck_assert_msg(gc.seqno_min() == 4,
"seqno_min: %" PRId64 " (expected 4)", gc.seqno_min());
/*
* 4. Lock seqno 4 to test that nothing changed
*/
gc.seqno_lock(4);
gc.seqno_release(9);
ps.wait_page_discard(); // page 2 should be held by a lock
ck_assert_msg(ps.total_pages() == 4,
"total_pages %zu (expected 5)", ps.total_pages());
ck_assert_msg(gc.seqno_min() == 4,
"seqno_min: %" PRId64 " (expected 4)", gc.seqno_min());
/* and release page 4 just to see that it doesn't go below because it is
* within the keep_pages_size */
gc.seqno_release(12);
/*
* 5. Unlock seqnos. Only after the second unlock pages should be discarded
*/
gc.seqno_unlock();
ps.wait_page_discard();
ck_assert_msg(ps.total_pages() == 4,
"total_pages %zu (expected 4)", ps.total_pages());
ck_assert_msg(gc.seqno_min() == 4,
"seqno_min: %" PRId64 " (expected 4)", gc.seqno_min());
gc.seqno_unlock();
ps.wait_page_discard(); // pages 2 and 3 should be discarded
ck_assert_msg(ps.total_pages() == 2,
"total_pages %zu (expected 2)", ps.total_pages());
ck_assert_msg(gc.seqno_min() == 10,
"seqno_min: %" PRId64 " (expected 10)", gc.seqno_min());
for (size_t seqno(10); seqno <= buf.size(); seqno++)
{
gc.seqno_release(seqno);
}
mark_point();
}
END_TEST
Suite* gcache_top_suite()
{
Suite* s = suite_create("gcache::top-level");
TCase* tc;
tc = tcase_create("test");
tcase_add_test(tc, top_level_page_caching);
tcase_add_test(tc, top_level_page_caching_locking);
suite_add_tcase(s, tc);
return s;
}
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