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vk_resource_manager: Implement VKResourceManager and fence allocator

CommitFence iterates a pool of fences until one is found. If all fences
are being used at the same time, allocate more.
This commit is contained in:
ReinUsesLisp 2019-02-14 13:11:32 -03:00
parent aa0b6babda
commit 0ffdd0a683
2 changed files with 85 additions and 0 deletions

View file

@ -4,12 +4,16 @@
#include <algorithm>
#include "common/assert.h"
#include "common/logging/log.h"
#include "video_core/renderer_vulkan/declarations.h"
#include "video_core/renderer_vulkan/vk_device.h"
#include "video_core/renderer_vulkan/vk_resource_manager.h"
namespace Vulkan {
// TODO(Rodrigo): Fine tune these numbers.
constexpr std::size_t FENCES_GROW_STEP = 0x40;
VKResource::VKResource() = default;
VKResource::~VKResource() = default;
@ -117,4 +121,62 @@ void VKFenceWatch::OnFenceRemoval(VKFence* signaling_fence) {
fence = nullptr;
}
VKResourceManager::VKResourceManager(const VKDevice& device) : device{device} {
GrowFences(FENCES_GROW_STEP);
}
VKResourceManager::~VKResourceManager() = default;
VKFence& VKResourceManager::CommitFence() {
const auto StepFences = [&](bool gpu_wait, bool owner_wait) -> VKFence* {
const auto Tick = [=](auto& fence) { return fence->Tick(gpu_wait, owner_wait); };
const auto hinted = fences.begin() + fences_iterator;
auto it = std::find_if(hinted, fences.end(), Tick);
if (it == fences.end()) {
it = std::find_if(fences.begin(), hinted, Tick);
if (it == hinted) {
return nullptr;
}
}
fences_iterator = std::distance(fences.begin(), it) + 1;
if (fences_iterator >= fences.size())
fences_iterator = 0;
auto& fence = *it;
fence->Commit();
return fence.get();
};
VKFence* found_fence = StepFences(false, false);
if (!found_fence) {
// Try again, this time waiting.
found_fence = StepFences(true, false);
if (!found_fence) {
// Allocate new fences and try again.
LOG_INFO(Render_Vulkan, "Allocating new fences {} -> {}", fences.size(),
fences.size() + FENCES_GROW_STEP);
GrowFences(FENCES_GROW_STEP);
found_fence = StepFences(true, false);
ASSERT(found_fence != nullptr);
}
}
return *found_fence;
}
void VKResourceManager::GrowFences(std::size_t new_fences_count) {
const auto dev = device.GetLogical();
const auto& dld = device.GetDispatchLoader();
const vk::FenceCreateInfo fence_ci;
const std::size_t previous_size = fences.size();
fences.resize(previous_size + new_fences_count);
std::generate(fences.begin() + previous_size, fences.end(), [&]() {
return std::make_unique<VKFence>(device, dev.createFenceUnique(fence_ci, nullptr, dld));
});
}
} // namespace Vulkan

View file

@ -4,6 +4,8 @@
#pragma once
#include <cstddef>
#include <memory>
#include <vector>
#include "video_core/renderer_vulkan/declarations.h"
@ -116,4 +118,25 @@ private:
VKFence* fence{}; ///< Fence watching this resource. nullptr when the watch is free.
};
/**
* The resource manager handles all resources that can be protected with a fence avoiding
* driver-side or GPU-side concurrent usage. Usage is documented in VKFence.
*/
class VKResourceManager final {
public:
explicit VKResourceManager(const VKDevice& device);
~VKResourceManager();
/// Commits a fence. It has to be sent to a queue and released.
VKFence& CommitFence();
private:
/// Allocates new fences.
void GrowFences(std::size_t new_fences_count);
const VKDevice& device; ///< Device handler.
std::size_t fences_iterator = 0; ///< Index where a free fence is likely to be found.
std::vector<std::unique_ptr<VKFence>> fences; ///< Pool of fences.
};
} // namespace Vulkan