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// Copyright 2018 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include <vespa/vespalib/datastore/buffer_type.h>
#include <vespa/vespalib/testkit/testapp.h>
using namespace vespalib::datastore;
using IntBufferType = BufferType<int>;
constexpr uint32_t ARRAYS_SIZE(4);
constexpr uint32_t MAX_ARRAYS(128);
constexpr uint32_t NUM_ARRAYS_FOR_NEW_BUFFER(0);
struct Setup {
uint32_t _minArrays;
ElemCount _usedElems;
ElemCount _neededElems;
ElemCount _deadElems;
uint32_t _bufferId;
float _allocGrowFactor;
bool _resizing;
Setup()
: _minArrays(0),
_usedElems(0),
_neededElems(0),
_deadElems(0),
_bufferId(1),
_allocGrowFactor(0.5),
_resizing(false)
{}
Setup &minArrays(uint32_t value) { _minArrays = value; return *this; }
Setup &used(size_t value) { _usedElems = value; return *this; }
Setup &needed(size_t value) { _neededElems = value; return *this; }
Setup &dead(size_t value) { _deadElems = value; return *this; }
Setup &bufferId(uint32_t value) { _bufferId = value; return *this; }
Setup &resizing(bool value) { _resizing = value; return *this; }
};
struct Fixture {
std::vector<Setup> setups;
IntBufferType bufferType;
int buffer[ARRAYS_SIZE];
Fixture(const Setup &setup_)
: setups(),
bufferType(ARRAYS_SIZE, setup_._minArrays, MAX_ARRAYS, NUM_ARRAYS_FOR_NEW_BUFFER, setup_._allocGrowFactor),
buffer()
{
setups.reserve(4);
setups.push_back(setup_);
}
~Fixture() {
for (auto& setup : setups) {
bufferType.onHold(setup._bufferId, &setup._usedElems, &setup._deadElems);
bufferType.onFree(setup._usedElems);
}
}
Setup& curr_setup() {
return setups.back();
}
void add_setup(const Setup& setup_in) {
// The buffer type stores pointers to ElemCount (from Setup) and we must ensure these do not move in memory.
assert(setups.size() < setups.capacity());
setups.push_back(setup_in);
}
void onActive() {
bufferType.onActive(curr_setup()._bufferId, &curr_setup()._usedElems, &curr_setup()._deadElems, &buffer[0]);
}
size_t arraysToAlloc() {
return bufferType.calcArraysToAlloc(curr_setup()._bufferId, curr_setup()._neededElems, curr_setup()._resizing);
}
void assertArraysToAlloc(size_t exp) {
onActive();
EXPECT_EQUAL(exp, arraysToAlloc());
}
};
void
assertArraysToAlloc(size_t exp, const Setup &setup)
{
Fixture f(setup);
f.assertArraysToAlloc(exp);
}
TEST("require that complete arrays are allocated")
{
TEST_DO(assertArraysToAlloc(1, Setup().needed(1)));
TEST_DO(assertArraysToAlloc(1, Setup().needed(2)));
TEST_DO(assertArraysToAlloc(1, Setup().needed(3)));
TEST_DO(assertArraysToAlloc(1, Setup().needed(4)));
TEST_DO(assertArraysToAlloc(2, Setup().needed(5)));
}
TEST("require that reserved elements are taken into account when not resizing")
{
TEST_DO(assertArraysToAlloc(2, Setup().needed(1).bufferId(0)));
TEST_DO(assertArraysToAlloc(2, Setup().needed(4).bufferId(0)));
TEST_DO(assertArraysToAlloc(3, Setup().needed(5).bufferId(0)));
}
TEST("require that arrays to alloc is based on currently used elements (no resizing)")
{
TEST_DO(assertArraysToAlloc(2, Setup().used(4 * 4).needed(4)));
TEST_DO(assertArraysToAlloc(4, Setup().used(8 * 4).needed(4)));
}
TEST("require that arrays to alloc is based on currently used elements (with resizing)")
{
TEST_DO(assertArraysToAlloc(4 + 2, Setup().used(4 * 4).needed(4).resizing(true)));
TEST_DO(assertArraysToAlloc(8 + 4, Setup().used(8 * 4).needed(4).resizing(true)));
TEST_DO(assertArraysToAlloc(4 + 3, Setup().used(4 * 4).needed(3 * 4).resizing(true)));
}
TEST("require that arrays to alloc always contain elements needed")
{
TEST_DO(assertArraysToAlloc(2, Setup().used(4 * 4).needed(2 * 4)));
TEST_DO(assertArraysToAlloc(3, Setup().used(4 * 4).needed(3 * 4)));
TEST_DO(assertArraysToAlloc(4, Setup().used(4 * 4).needed(4 * 4)));
}
TEST("require that arrays to alloc is capped to max arrays")
{
TEST_DO(assertArraysToAlloc(127, Setup().used(254 * 4).needed(4)));
TEST_DO(assertArraysToAlloc(128, Setup().used(256 * 4).needed(4)));
TEST_DO(assertArraysToAlloc(128, Setup().used(258 * 4).needed(8)));
}
TEST("require that arrays to alloc is capped to min arrays")
{
TEST_DO(assertArraysToAlloc(16, Setup().used(30 * 4).needed(4).minArrays(16)));
TEST_DO(assertArraysToAlloc(16, Setup().used(32 * 4).needed(4).minArrays(16)));
TEST_DO(assertArraysToAlloc(17, Setup().used(34 * 4).needed(4).minArrays(16)));
}
TEST("arrays to alloc considers used elements across all active buffers of same type (no resizing)")
{
Fixture f(Setup().used(6 * 4));
f.assertArraysToAlloc(6 * 0.5);
f.add_setup(Setup().used(8 * 4).bufferId(2));
f.assertArraysToAlloc((6 + 8) * 0.5);
f.add_setup(Setup().used(10 * 4).bufferId(3));
f.assertArraysToAlloc((6 + 8 + 10) * 0.5);
}
TEST("arrays to alloc considers used elements across all active buffers of same type when resizing")
{
Fixture f(Setup().used(6 * 4));
f.assertArraysToAlloc(6 * 0.5);
f.add_setup(Setup().used(8 * 4).resizing(true).bufferId(2));
f.assertArraysToAlloc(8 + (6 + 8) * 0.5);
}
TEST("arrays to alloc considers (and subtracts) dead elements across all active buffers of same type (no resizing)")
{
Fixture f(Setup().used(6 * 4).dead(2 * 4));
f.assertArraysToAlloc((6 - 2) * 0.5);
f.add_setup(Setup().used(12 * 4).dead(4 * 4).bufferId(2));
f.assertArraysToAlloc((6 - 2 + 12 - 4) * 0.5);
f.add_setup(Setup().used(20 * 4).dead(6 * 4).bufferId(3));
f.assertArraysToAlloc((6 - 2 + 12 - 4 + 20 - 6) * 0.5);
}
TEST("arrays to alloc considers (and subtracts) dead elements across all active buffers of same type when resizing")
{
Fixture f(Setup().used(6 * 4).dead(2 * 4));
f.assertArraysToAlloc((6 - 2) * 0.5);
f.add_setup(Setup().used(12 * 4).dead(4 * 4).resizing(true).bufferId(2));
f.assertArraysToAlloc(12 + (6 - 2 + 12 - 4) * 0.5);
}
TEST_MAIN() { TEST_RUN_ALL(); }
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