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// SPDX-License-Identifier: GPL-3.0-or-later
#include <array>
#include <chrono>
#include <cstring>
#include <iostream>
#include <random>
#include <catch2/catch_test_macros.hpp>
#include "video_core/texture_cache/descriptor_table.h"
namespace {
struct DescriptorMemory {
std::array<std::array<u64, 128>, 2> banks{};
void ReadBlockUnsafe(GPUVAddr address, void* output, size_t size) const {
const auto bank = (address - 0x1000) / 0x1000;
const auto offset = (address - 0x1000) % 0x1000;
std::memcpy(output, reinterpret_cast<const u8*>(banks[bank].data()) + offset, size);
}
};
} // namespace
TEST_CASE("Descriptor invalidation matches eager refresh across mutations", "[descriptor_table]") {
DescriptorMemory memory;
VideoCommon::DescriptorTable<u64> table;
REQUIRE(table.Synchronize(0x1000, 127));
std::array<bool, 128> seen{};
std::array<u64, 128> previous{};
std::mt19937 random{0x5080};
unsigned bank{};
u32 limit = 127;
for (unsigned i = 0; i < 40000; ++i) {
switch (random() % 5) {
case 0:
table.Invalidate();
seen.fill(false);
break;
case 1:
memory.banks[random() % 2][random() % 128] = random();
break;
case 2: {
const auto next_bank = random() % 2;
const u32 next_limit = random() % 2 ? 63 : 127;
const bool changed = next_bank != bank || next_limit != limit;
REQUIRE(table.Synchronize(0x1000 + next_bank * 0x1000, next_limit) == changed);
if (changed) {
seen.fill(false);
}
bank = next_bank;
limit = next_limit;
break;
}
default: {
const u32 index = random() % (limit + 1);
const u64 expected = memory.banks[bank][index];
const bool changed = !seen[index] || previous[index] != expected;
const auto actual = table.Read(memory, index);
REQUIRE(actual.first == expected);
REQUIRE(actual.second == changed);
seen[index] = true;
previous[index] = expected;
}
}
}
}
TEST_CASE("Repeated image deletion cannot reuse stale descriptor view IDs", "[descriptor_table]") {
DescriptorMemory memory;
std::array<VideoCommon::DescriptorTable<u64>, 5> channels;
std::array<std::array<unsigned, 128>, 5> view_ids{};
unsigned live_generation = 1;
const auto visit = [&](size_t channel, u32 index) {
if (channels[channel].Read(memory, index).second) {
view_ids[channel][index] = live_generation;
}
return view_ids[channel][index];
};
for (size_t channel = 0; channel < channels.size(); ++channel) {
REQUIRE(channels[channel].Synchronize(0x1000, 127));
for (u32 index = 0; index < 128; ++index) {
REQUIRE(visit(channel, index) == live_generation);
}
}
for (unsigned generation = 0; generation < 32; ++generation) {
++live_generation;
for (unsigned deletion = 0; deletion < 50; ++deletion) {
for (auto& table : channels) {
table.Invalidate();
}
}
for (size_t channel = 0; channel < channels.size(); ++channel) {
for (u32 index = 0; index < 128; ++index) {
REQUIRE(visit(channel, index) == live_generation);
REQUIRE_FALSE(channels[channel].Read(memory, index).second);
}
}
}
}
TEST_CASE("Descriptor invalidation CPU benchmark", "[.][cache_bench]") {
DescriptorMemory memory;
const auto measure = [&](bool deferred) {
std::array<VideoCommon::DescriptorTable<u64>, 5> tables;
for (auto& table : tables) {
REQUIRE(table.Synchronize(0x1000, 127));
}
void (*volatile invalidate)(VideoCommon::DescriptorTable<u64>&) =
deferred ? +[](VideoCommon::DescriptorTable<u64>& table) { table.Invalidate(); }
: +[](VideoCommon::DescriptorTable<u64>& table) {
std::ranges::fill(table.read_descriptors, 0);
};
size_t changed{};
const auto start = std::chrono::steady_clock::now();
for (unsigned batch = 0; batch < 2000; ++batch) {
for (unsigned deletion = 0; deletion < 50; ++deletion) {
for (auto& table : tables) {
invalidate(table);
}
}
for (auto& table : tables) {
changed += table.Read(memory, 0).second;
}
}
const auto ms =
std::chrono::duration<double, std::milli>(std::chrono::steady_clock::now() - start)
.count();
REQUIRE(changed == 10000);
return ms;
};
const double eager = measure(false);
const double deferred = measure(true);
std::cout << "Descriptor bitmap invalidation: eager=" << eager << " ms deferred=" << deferred
<< " ms (CPU only, not gameplay FPS)\n";
}
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