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growable command buffer pool

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This commit is contained in:
nmzik
2026-08-07 18:26:42 +02:00
parent 67cfec9063
commit 5125cd09c7
3 changed files with 108 additions and 36 deletions
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src/graphics/host_gpu/renderer/commandScheduler.cpp
+53 -10
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@@ -99,7 +99,10 @@ bool CommandScheduler::InDeferredOperation() noexcept {
CommandScheduler::CommandScheduler(RenderContext& context, GraphicContext& graphics)
: m_master(graphics), m_context(context), m_graphics(graphics),
m_priority_thread([this](std::stop_token stop) { PriorityOperationsThread(stop); }) {}
m_priority_thread([this](std::stop_token stop) { PriorityOperationsThread(stop); }) {
m_buffers.reserve(CommandBufferGrowStep);
m_buffer_ticks.reserve(CommandBufferGrowStep);
}
CommandScheduler::~CommandScheduler() {
Shutdown();
@@ -154,10 +157,7 @@ void CommandScheduler::Begin(HW::Context& registers, HW::UserConfig& user_config
m_shaders = &shaders;
if (!Active()) {
for (auto& buffer: m_buffers) {
buffer = std::make_unique<RenderCommandBuffer>(*this);
}
m_current = 0;
m_current = static_cast<int>(GrowCommandBuffers());
}
BindCurrent();
@@ -235,7 +235,13 @@ void CommandScheduler::Wait(uint64_t tick) {
}
void CommandScheduler::PopPendingOperations() {
m_master.Refresh();
PopPendingOperations(true);
}
void CommandScheduler::PopPendingOperations(bool refresh_gpu_tick) {
if (refresh_gpu_tick) {
m_master.Refresh();
}
for (;;) {
Common::UniqueFunction<void> callback;
{
@@ -362,7 +368,7 @@ uint64_t CommandScheduler::NextSubmitSequence() noexcept {
}
void CommandScheduler::CheckActive() const {
EXIT_IF(!Active() || m_current >= BufferCount);
EXIT_IF(!Active() || static_cast<size_t>(m_current) >= m_buffers.size());
}
RenderCommandBuffer& CommandScheduler::Current() const {
@@ -384,15 +390,52 @@ CommandBuffer& CommandScheduler::SubmitCurrent(SubmitInfo& submit) {
const auto signal_tick = m_master.NextTick();
submit.AddSignal(m_master.Handle(), signal_tick);
submitted.Execute(submit);
m_recording = false;
m_buffer_ticks[static_cast<size_t>(m_current)] = signal_tick;
m_recording = false;
return submitted;
}
int CommandScheduler::FindReusableBuffer(uint64_t gpu_tick) const {
EXIT_IF(m_buffer_ticks.size() != m_buffers.size());
const auto buffer_count = m_buffers.size();
for (size_t offset = 1; offset <= buffer_count; ++offset) {
const auto candidate = (static_cast<size_t>(m_current) + offset) % buffer_count;
if (gpu_tick >= m_buffer_ticks[candidate]) {
return static_cast<int>(candidate);
}
}
return -1;
}
size_t CommandScheduler::GrowCommandBuffers() {
const auto first = m_buffers.size();
const auto end = first + CommandBufferGrowStep;
m_buffers.reserve(end);
m_buffer_ticks.reserve(end);
for (size_t i = first; i < end; ++i) {
m_buffers.emplace_back(std::make_unique<RenderCommandBuffer>(*this));
m_buffer_ticks.push_back(0);
}
return first;
}
void CommandScheduler::BeginNext() {
EXIT_IF(m_recording);
m_current = (m_current + 1) % BufferCount;
auto candidate = FindReusableBuffer(m_master.KnownGpuTick());
bool refreshed = false;
if (candidate < 0) {
m_master.Refresh();
refreshed = true;
candidate = FindReusableBuffer(m_master.KnownGpuTick());
}
if (candidate < 0) {
candidate = static_cast<int>(GrowCommandBuffers());
}
m_current = candidate;
Current().WaitForFenceAndReset();
PopPendingOperations();
PopPendingOperations(!refreshed);
BindCurrent();
Current().Begin();
m_recording = true;