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Reaper: Tune it up to be an smart GC.

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This commit is contained in:
Fernando Sahmkow 2021-06-13 15:47:54 +02:00
parent a11bc4a382
commit d8ad6aa187
5 changed files with 130 additions and 13 deletions
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27
src/video_core/buffer_cache/buffer_cache.h
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@ -65,6 +65,9 @@ class BufferCache {
static constexpr BufferId NULL_BUFFER_ID{0};
static constexpr u64 expected_memory = 512ULL * 1024ULL * 1024ULL;
static constexpr u64 critical_memory = 1024ULL * 1024ULL * 1024ULL;
using Maxwell = Tegra::Engines::Maxwell3D::Regs;
using Runtime = typename P::Runtime;
@ -327,6 +330,7 @@ private:
typename SlotVector<Buffer>::Iterator deletion_iterator;
u64 frame_tick = 0;
u64 total_used_memory = 0;
std::array<BufferId, ((1ULL << 39) >> PAGE_BITS)> page_table;
};
@ -346,6 +350,10 @@ BufferCache<P>::BufferCache(VideoCore::RasterizerInterface& rasterizer_,
template <class P>
void BufferCache<P>::TickFrame() {
SCOPE_EXIT({
++frame_tick;
delayed_destruction_ring.Tick();
});
// Calculate hits and shots and move hit bits to the right
const u32 hits = std::reduce(uniform_cache_hits.begin(), uniform_cache_hits.end());
const u32 shots = std::reduce(uniform_cache_shots.begin(), uniform_cache_shots.end());
@ -359,8 +367,13 @@ void BufferCache<P>::TickFrame() {
const bool skip_preferred = hits * 256 < shots * 251;
uniform_buffer_skip_cache_size = skip_preferred ? DEFAULT_SKIP_CACHE_SIZE : 0;
static constexpr u64 ticks_to_destroy = 120;
int num_iterations = 32;
const bool activate_gc = total_used_memory >= expected_memory;
if (!activate_gc) {
return;
}
const bool agressive_gc = total_used_memory >= critical_memory;
const u64 ticks_to_destroy = agressive_gc ? 60 : 120;
int num_iterations = agressive_gc ? 64 : 32;
for (; num_iterations > 0; --num_iterations) {
if (deletion_iterator == slot_buffers.end()) {
deletion_iterator = slot_buffers.begin();
@ -375,8 +388,6 @@ void BufferCache<P>::TickFrame() {
DeleteBuffer(buffer_id);
}
}
delayed_destruction_ring.Tick();
++frame_tick;
}
template <class P>
@ -1115,8 +1126,14 @@ template <class P>
template <bool insert>
void BufferCache<P>::ChangeRegister(BufferId buffer_id) {
const Buffer& buffer = slot_buffers[buffer_id];
const auto size = buffer.SizeBytes();
if (insert) {
total_used_memory += Common::AlignUp(size, 1024);
} else {
total_used_memory -= Common::AlignUp(size, 1024);
}
const VAddr cpu_addr_begin = buffer.CpuAddr();
const VAddr cpu_addr_end = cpu_addr_begin + buffer.SizeBytes();
const VAddr cpu_addr_end = cpu_addr_begin + size;
const u64 page_begin = cpu_addr_begin / PAGE_SIZE;
const u64 page_end = Common::DivCeil(cpu_addr_end, PAGE_SIZE);
for (u64 page = page_begin; page != page_end; ++page) {