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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include <vespa/vespalib/datastore/compact_buffer_candidates.h>
#include <vespa/vespalib/gtest/gtest.h>
using vespalib::datastore::CompactBufferCandidates;
namespace {
constexpr uint32_t num_buffers = 1024;
constexpr double default_ratio = 0.2 / 2;
constexpr size_t default_slack = 1000;
constexpr double default_active_buffers_ratio = 1.0;
};
class CompactBufferCandidatesTest : public ::testing::Test
{
public:
CompactBufferCandidates candidates;
CompactBufferCandidatesTest();
~CompactBufferCandidatesTest() override;
void reset_candidates(uint32_t max_buffers, double active_buffers_ratio = default_active_buffers_ratio);
CompactBufferCandidatesTest& add(uint32_t buffer_id, size_t used, size_t dead);
void assert_select(const std::vector<uint32_t>& exp);
void set_free_buffers(uint32_t free_buffers = 100);
};
CompactBufferCandidatesTest::CompactBufferCandidatesTest()
: ::testing::Test(),
candidates(num_buffers, 1, default_active_buffers_ratio, default_ratio, default_slack)
{
}
CompactBufferCandidatesTest::~CompactBufferCandidatesTest() = default;
void
CompactBufferCandidatesTest::reset_candidates(uint32_t max_buffers, double active_buffers_ratio)
{
candidates = CompactBufferCandidates(num_buffers, max_buffers, active_buffers_ratio, default_ratio, default_slack);
}
CompactBufferCandidatesTest&
CompactBufferCandidatesTest::add(uint32_t buffer_id, size_t used, size_t dead)
{
candidates.add(buffer_id, used, dead);
return *this;
}
void
CompactBufferCandidatesTest::set_free_buffers(uint32_t free_buffers)
{
candidates.set_free_buffers(free_buffers);
}
void
CompactBufferCandidatesTest::assert_select(const std::vector<uint32_t>& exp)
{
std::vector<uint32_t> act;
candidates.select(act);
EXPECT_EQ(exp, act);
}
TEST_F(CompactBufferCandidatesTest, select_single)
{
add(0, 10000, 2000).add(1, 10000, 3000).set_free_buffers();
assert_select({1});
}
TEST_F(CompactBufferCandidatesTest, select_two)
{
reset_candidates(2);
add(0, 10000, 2000).add(3, 10000, 3000).add(7, 10000, 4000).set_free_buffers();
assert_select({7, 3});
}
TEST_F(CompactBufferCandidatesTest, select_all)
{
reset_candidates(4);
add(1, 10000, 2000).add(3, 10000, 4000).add(8, 10000, 3000).set_free_buffers();
assert_select({3, 8, 1});
}
TEST_F(CompactBufferCandidatesTest, select_cutoff_by_ratio)
{
reset_candidates(4);
add(1, 100000, 9999).add(3, 100000, 40000).add(8, 100000, 30000).set_free_buffers();
assert_select({3, 8});
}
TEST_F(CompactBufferCandidatesTest, select_cutoff_by_slack)
{
reset_candidates(4);
add(1, 2000, 999).add(3, 2000, 1200).add(9, 2000, 1300).set_free_buffers();
assert_select({9, 3});
}
TEST_F(CompactBufferCandidatesTest, select_cutoff_by_active_buffers_ratio)
{
reset_candidates(4, 0.5);
add(1, 10000, 2000).add(3, 10000, 4000).add(8, 10000, 3000).set_free_buffers();
assert_select({3, 8});
}
TEST_F(CompactBufferCandidatesTest, select_cutoff_by_lack_of_free_buffers)
{
reset_candidates(4);
add(1, 10000, 2000).add(3, 10000, 4000).add(8, 10000, 3000).set_free_buffers(9);
assert_select({3, 8});
}
GTEST_MAIN_RUN_ALL_TESTS()
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