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gl_shader_disk_cache: Use VectorVfsFile for the virtual precompiled shader cache file

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This commit is contained in:
unknown 2019-02-25 11:47:23 +01:00 committed by FreddyFunk
parent 3fe542cf60
commit 9db2c734c9
3 changed files with 168 additions and 101 deletions
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10
src/video_core/renderer_opengl/gl_shader_cache.cpp
View file

@ -363,6 +363,10 @@ void ShaderCacheOpenGL::LoadDiskCache(const std::atomic_bool& stop_loading,
if (stop_loading)
return;
// Track if precompiled cache was altered during loading to know if we have to serialize the
// virtual precompiled cache file back to the hard drive
bool precompiled_cache_altered = false;
// Build shaders
if (callback)
callback(VideoCore::LoadCallbackStage::Build, 0, usages.size());
@ -384,6 +388,7 @@ void ShaderCacheOpenGL::LoadDiskCache(const std::atomic_bool& stop_loading,
if (!shader) {
// Invalidate the precompiled cache if a shader dumped shader was rejected
disk_cache.InvalidatePrecompiled();
precompiled_cache_altered = true;
dumps.clear();
}
}
@ -405,8 +410,13 @@ void ShaderCacheOpenGL::LoadDiskCache(const std::atomic_bool& stop_loading,
if (dumps.find(usage) == dumps.end()) {
const auto& program = precompiled_programs.at(usage);
disk_cache.SaveDump(usage, program->handle);
precompiled_cache_altered = true;
}
}
if (precompiled_cache_altered) {
disk_cache.SaveVirtualPrecompiledFile();
}
}
CachedProgram ShaderCacheOpenGL::GeneratePrecompiledProgram(

202
src/video_core/renderer_opengl/gl_shader_disk_cache.cpp
View file

@ -11,7 +11,6 @@
#include "common/file_util.h"
#include "common/logging/log.h"
#include "common/scm_rev.h"
#include "common/zstd_compression.h"
#include "core/core.h"
#include "core/hle/kernel/process.h"
@ -104,7 +103,8 @@ bool ShaderDiskCacheRaw::Save(FileUtil::IOFile& file) const {
return true;
}
ShaderDiskCacheOpenGL::ShaderDiskCacheOpenGL(Core::System& system) : system{system} {}
ShaderDiskCacheOpenGL::ShaderDiskCacheOpenGL(Core::System& system)
: system{system}, precompiled_cache_virtual_file_offset{0} {}
std::optional<std::pair<std::vector<ShaderDiskCacheRaw>, std::vector<ShaderDiskCacheUsage>>>
ShaderDiskCacheOpenGL::LoadTransferable() {
@ -177,6 +177,7 @@ ShaderDiskCacheOpenGL::LoadTransferable() {
return {};
}
}
return {{raws, usages}};
}
@ -208,51 +209,62 @@ ShaderDiskCacheOpenGL::LoadPrecompiled() {
std::optional<std::pair<std::unordered_map<u64, ShaderDiskCacheDecompiled>,
std::unordered_map<ShaderDiskCacheUsage, ShaderDiskCacheDump>>>
ShaderDiskCacheOpenGL::LoadPrecompiledFile(FileUtil::IOFile& file) {
std::vector<u8> precompiled_cache(file.GetSize());
file.ReadBytes(precompiled_cache.data(), precompiled_cache.size());
SaveArrayToPrecompiled(precompiled_cache.data(), precompiled_cache.size());
precompiled_cache_virtual_file_offset = 0;
ShaderCacheVersionHash file_hash{};
if (file.ReadArray(file_hash.data(), file_hash.size()) != file_hash.size()) {
if (!LoadArrayFromPrecompiled(file_hash.data(), file_hash.size())) {
precompiled_cache_virtual_file_offset = 0;
return {};
}
if (GetShaderCacheVersionHash() != file_hash) {
LOG_INFO(Render_OpenGL, "Precompiled cache is from another version of the emulator");
precompiled_cache_virtual_file_offset = 0;
return {};
}
std::unordered_map<u64, ShaderDiskCacheDecompiled> decompiled;
std::unordered_map<ShaderDiskCacheUsage, ShaderDiskCacheDump> dumps;
while (file.Tell() < file.GetSize()) {
while (precompiled_cache_virtual_file_offset < precompiled_cache_virtual_file.GetSize()) {
PrecompiledEntryKind kind{};
if (file.ReadBytes(&kind, sizeof(u32)) != sizeof(u32)) {
if (!LoadObjectFromPrecompiled(kind)) {
return {};
}
switch (kind) {
case PrecompiledEntryKind::Decompiled: {
u64 unique_identifier{};
if (file.ReadBytes(&unique_identifier, sizeof(u64)) != sizeof(u64))
if (!LoadObjectFromPrecompiled(unique_identifier)) {
return {};
}
const auto entry = LoadDecompiledEntry(file);
if (!entry)
const auto entry = LoadDecompiledEntry();
if (!entry) {
return {};
}
decompiled.insert({unique_identifier, std::move(*entry)});
break;
}
case PrecompiledEntryKind::Dump: {
ShaderDiskCacheUsage usage;
if (file.ReadBytes(&usage, sizeof(usage)) != sizeof(usage))
if (!LoadObjectFromPrecompiled(usage)) {
return {};
}
ShaderDiskCacheDump dump;
if (file.ReadBytes(&dump.binary_format, sizeof(u32)) != sizeof(u32))
if (!LoadObjectFromPrecompiled(dump.binary_format)) {
return {};
}
u32 binary_length{};
if (file.ReadBytes(&binary_length, sizeof(u32)) != sizeof(u32)) {
if (!LoadObjectFromPrecompiled(binary_length)) {
return {};
}
dump.binary.resize(binary_length);
if (file.ReadArray(dump.binary.data(), binary_length) != binary_length) {
if (!LoadArrayFromPrecompiled(dump.binary.data(), dump.binary.size())) {
return {};
}
@ -266,15 +278,14 @@ ShaderDiskCacheOpenGL::LoadPrecompiledFile(FileUtil::IOFile& file) {
return {{decompiled, dumps}};
}
std::optional<ShaderDiskCacheDecompiled> ShaderDiskCacheOpenGL::LoadDecompiledEntry(
FileUtil::IOFile& file) {
std::optional<ShaderDiskCacheDecompiled> ShaderDiskCacheOpenGL::LoadDecompiledEntry() {
u32 code_size{};
if (file.ReadBytes(&code_size, sizeof(u32)) != sizeof(u32)) {
if (!LoadObjectFromPrecompiled(code_size)) {
return {};
}
std::vector<u8> code(code_size);
if (file.ReadArray(code.data(), code.size()) != code_size) {
if (!LoadArrayFromPrecompiled(code.data(), code.size())) {
return {};
}
@ -282,23 +293,26 @@ std::optional<ShaderDiskCacheDecompiled> ShaderDiskCacheOpenGL::LoadDecompiledEn
entry.code = std::string(reinterpret_cast<const char*>(code.data()), code_size);
u32 const_buffers_count{};
if (file.ReadBytes(&const_buffers_count, sizeof(u32)) != sizeof(u32))
if (!LoadObjectFromPrecompiled(const_buffers_count)) {
return {};
}
for (u32 i = 0; i < const_buffers_count; ++i) {
u32 max_offset{};
u32 index{};
u8 is_indirect{};
if (file.ReadBytes(&max_offset, sizeof(u32)) != sizeof(u32) ||
file.ReadBytes(&index, sizeof(u32)) != sizeof(u32) ||
file.ReadBytes(&is_indirect, sizeof(u8)) != sizeof(u8)) {
if (!LoadObjectFromPrecompiled(max_offset) || !LoadObjectFromPrecompiled(index) ||
!LoadObjectFromPrecompiled(is_indirect)) {
return {};
}
entry.entries.const_buffers.emplace_back(max_offset, is_indirect != 0, index);
}
u32 samplers_count{};
if (file.ReadBytes(&samplers_count, sizeof(u32)) != sizeof(u32))
if (!LoadObjectFromPrecompiled(samplers_count)) {
return {};
}
for (u32 i = 0; i < samplers_count; ++i) {
u64 offset{};
u64 index{};
@ -306,12 +320,9 @@ std::optional<ShaderDiskCacheDecompiled> ShaderDiskCacheOpenGL::LoadDecompiledEn
u8 is_array{};
u8 is_shadow{};
u8 is_bindless{};
if (file.ReadBytes(&offset, sizeof(u64)) != sizeof(u64) ||
file.ReadBytes(&index, sizeof(u64)) != sizeof(u64) ||
file.ReadBytes(&type, sizeof(u32)) != sizeof(u32) ||
file.ReadBytes(&is_array, sizeof(u8)) != sizeof(u8) ||
file.ReadBytes(&is_shadow, sizeof(u8)) != sizeof(u8) ||
file.ReadBytes(&is_bindless, sizeof(u8)) != sizeof(u8)) {
if (!LoadObjectFromPrecompiled(offset) || !LoadObjectFromPrecompiled(index) ||
!LoadObjectFromPrecompiled(type) || !LoadObjectFromPrecompiled(is_array) ||
!LoadObjectFromPrecompiled(is_shadow) || !LoadObjectFromPrecompiled(is_bindless)) {
return {};
}
entry.entries.samplers.emplace_back(static_cast<std::size_t>(offset),
@ -321,17 +332,17 @@ std::optional<ShaderDiskCacheDecompiled> ShaderDiskCacheOpenGL::LoadDecompiledEn
}
u32 global_memory_count{};
if (file.ReadBytes(&global_memory_count, sizeof(u32)) != sizeof(u32))
if (!LoadObjectFromPrecompiled(global_memory_count)) {
return {};
}
for (u32 i = 0; i < global_memory_count; ++i) {
u32 cbuf_index{};
u32 cbuf_offset{};
u8 is_read{};
u8 is_written{};
if (file.ReadBytes(&cbuf_index, sizeof(u32)) != sizeof(u32) ||
file.ReadBytes(&cbuf_offset, sizeof(u32)) != sizeof(u32) ||
file.ReadBytes(&is_read, sizeof(u8)) != sizeof(u8) ||
file.ReadBytes(&is_written, sizeof(u8)) != sizeof(u8)) {
if (!LoadObjectFromPrecompiled(cbuf_index) || !LoadObjectFromPrecompiled(cbuf_offset) ||
!LoadObjectFromPrecompiled(is_read) || !LoadObjectFromPrecompiled(is_written)) {
return {};
}
entry.entries.global_memory_entries.emplace_back(cbuf_index, cbuf_offset, is_read != 0,
@ -340,72 +351,81 @@ std::optional<ShaderDiskCacheDecompiled> ShaderDiskCacheOpenGL::LoadDecompiledEn
for (auto& clip_distance : entry.entries.clip_distances) {
u8 clip_distance_raw{};
if (file.ReadBytes(&clip_distance_raw, sizeof(u8)) != sizeof(u8))
if (!LoadObjectFromPrecompiled(clip_distance_raw))
return {};
clip_distance = clip_distance_raw != 0;
}
u64 shader_length{};
if (file.ReadBytes(&shader_length, sizeof(u64)) != sizeof(u64))
if (!LoadObjectFromPrecompiled(shader_length)) {
return {};
}
entry.entries.shader_length = static_cast<std::size_t>(shader_length);
return entry;
}
bool ShaderDiskCacheOpenGL::SaveDecompiledFile(FileUtil::IOFile& file, u64 unique_identifier,
const std::string& code,
bool ShaderDiskCacheOpenGL::SaveDecompiledFile(u64 unique_identifier, const std::string& code,
const GLShader::ShaderEntries& entries) {
if (file.WriteObject(static_cast<u32>(PrecompiledEntryKind::Decompiled)) != 1 ||
file.WriteObject(unique_identifier) != 1 ||
file.WriteObject(static_cast<u32>(code.size())) != 1 ||
file.WriteArray(code.data(), code.size()) != code.size()) {
if (!SaveObjectToPrecompiled(static_cast<u32>(PrecompiledEntryKind::Decompiled)) ||
!SaveObjectToPrecompiled(unique_identifier) ||
!SaveObjectToPrecompiled(static_cast<u32>(code.size())) ||
!SaveArrayToPrecompiled(code.data(), code.size())) {
return false;
}
if (file.WriteObject(static_cast<u32>(entries.const_buffers.size())) != 1)
if (!SaveObjectToPrecompiled(static_cast<u32>(entries.const_buffers.size()))) {
return false;
}
for (const auto& cbuf : entries.const_buffers) {
if (file.WriteObject(static_cast<u32>(cbuf.GetMaxOffset())) != 1 ||
file.WriteObject(static_cast<u32>(cbuf.GetIndex())) != 1 ||
file.WriteObject(static_cast<u8>(cbuf.IsIndirect() ? 1 : 0)) != 1) {
if (!SaveObjectToPrecompiled(static_cast<u32>(cbuf.GetMaxOffset())) ||
!SaveObjectToPrecompiled(static_cast<u32>(cbuf.GetIndex())) ||
!SaveObjectToPrecompiled(static_cast<u8>(cbuf.IsIndirect() ? 1 : 0))) {
return false;
}
}
if (file.WriteObject(static_cast<u32>(entries.samplers.size())) != 1)
if (!SaveObjectToPrecompiled(static_cast<u32>(entries.samplers.size()))) {
return false;
}
for (const auto& sampler : entries.samplers) {
if (file.WriteObject(static_cast<u64>(sampler.GetOffset())) != 1 ||
file.WriteObject(static_cast<u64>(sampler.GetIndex())) != 1 ||
file.WriteObject(static_cast<u32>(sampler.GetType())) != 1 ||
file.WriteObject(static_cast<u8>(sampler.IsArray() ? 1 : 0)) != 1 ||
file.WriteObject(static_cast<u8>(sampler.IsShadow() ? 1 : 0)) != 1 ||
file.WriteObject(static_cast<u8>(sampler.IsBindless() ? 1 : 0)) != 1) {
if (!SaveObjectToPrecompiled(static_cast<u64>(sampler.GetOffset())) ||
!SaveObjectToPrecompiled(static_cast<u64>(sampler.GetIndex())) ||
!SaveObjectToPrecompiled(static_cast<u32>(sampler.GetType())) ||
!SaveObjectToPrecompiled(static_cast<u8>(sampler.IsArray() ? 1 : 0)) ||
!SaveObjectToPrecompiled(static_cast<u8>(sampler.IsShadow() ? 1 : 0)) ||
!SaveObjectToPrecompiled(static_cast<u8>(sampler.IsBindless() ? 1 : 0))) {
return false;
}
}
if (file.WriteObject(static_cast<u32>(entries.global_memory_entries.size())) != 1)
if (!SaveObjectToPrecompiled(static_cast<u32>(entries.global_memory_entries.size()))) {
return false;
}
for (const auto& gmem : entries.global_memory_entries) {
if (file.WriteObject(static_cast<u32>(gmem.GetCbufIndex())) != 1 ||
file.WriteObject(static_cast<u32>(gmem.GetCbufOffset())) != 1 ||
file.WriteObject(static_cast<u8>(gmem.IsRead() ? 1 : 0)) != 1 ||
file.WriteObject(static_cast<u8>(gmem.IsWritten() ? 1 : 0)) != 1) {
if (!SaveObjectToPrecompiled(static_cast<u32>(gmem.GetCbufIndex())) ||
!SaveObjectToPrecompiled(static_cast<u32>(gmem.GetCbufOffset())) ||
!SaveObjectToPrecompiled(static_cast<u8>(gmem.IsRead() ? 1 : 0)) ||
!SaveObjectToPrecompiled(static_cast<u8>(gmem.IsWritten() ? 1 : 0))) {
return false;
}
}
for (const bool clip_distance : entries.clip_distances) {
if (file.WriteObject(static_cast<u8>(clip_distance ? 1 : 0)) != 1)
if (!SaveObjectToPrecompiled(static_cast<u8>(clip_distance ? 1 : 0))) {
return false;
}
}
return file.WriteObject(static_cast<u64>(entries.shader_length)) == 1;
if (!SaveObjectToPrecompiled(static_cast<u64>(entries.shader_length))) {
return false;
}
return true;
}
void ShaderDiskCacheOpenGL::InvalidateTransferable() const {
void ShaderDiskCacheOpenGL::InvalidateTransferable() {
if (!FileUtil::Delete(GetTransferablePath())) {
LOG_ERROR(Render_OpenGL, "Failed to invalidate transferable file={}",
GetTransferablePath());
@ -413,7 +433,10 @@ void ShaderDiskCacheOpenGL::InvalidateTransferable() const {
InvalidatePrecompiled();
}
void ShaderDiskCacheOpenGL::InvalidatePrecompiled() const {
void ShaderDiskCacheOpenGL::InvalidatePrecompiled() {
// Clear virtaul precompiled cache file
precompiled_cache_virtual_file.Resize(0);
if (!FileUtil::Delete(GetPrecompiledPath())) {
LOG_ERROR(Render_OpenGL, "Failed to invalidate precompiled file={}", GetPrecompiledPath());
}
@ -469,15 +492,13 @@ void ShaderDiskCacheOpenGL::SaveDecompiled(u64 unique_identifier, const std::str
if (!IsUsable())
return;
FileUtil::IOFile file = AppendPrecompiledFile();
if (precompiled_cache_virtual_file.GetSize() == 0) {
SavePrecompiledHeaderToVirtualPrecompiledCache();
}
if (!file.IsOpen())
return;
if (!SaveDecompiledFile(file, unique_identifier, code, entries)) {
if (!SaveDecompiledFile(unique_identifier, code, entries)) {
LOG_ERROR(Render_OpenGL,
"Failed to save decompiled entry to the precompiled file - removing");
file.Close();
InvalidatePrecompiled();
}
}
@ -493,18 +514,13 @@ void ShaderDiskCacheOpenGL::SaveDump(const ShaderDiskCacheUsage& usage, GLuint p
std::vector<u8> binary(binary_length);
glGetProgramBinary(program, binary_length, nullptr, &binary_format, binary.data());
FileUtil::IOFile file = AppendPrecompiledFile();
if (!file.IsOpen())
return;
if (file.WriteObject(static_cast<u32>(PrecompiledEntryKind::Dump)) != 1 ||
file.WriteObject(usage) != 1 || file.WriteObject(static_cast<u32>(binary_format)) != 1 ||
file.WriteObject(static_cast<u32>(binary_length)) != 1 ||
file.WriteArray(binary.data(), binary.size()) != binary_length) {
if (!SaveObjectToPrecompiled(static_cast<u32>(PrecompiledEntryKind::Dump)) ||
!SaveObjectToPrecompiled(usage) ||
!SaveObjectToPrecompiled(static_cast<u32>(binary_format)) ||
!SaveObjectToPrecompiled(static_cast<u32>(binary_length)) ||
!SaveArrayToPrecompiled(binary.data(), binary.size())) {
LOG_ERROR(Render_OpenGL, "Failed to save binary program file in shader={:016x} - removing",
usage.unique_identifier);
file.Close();
InvalidatePrecompiled();
return;
}
@ -537,28 +553,32 @@ FileUtil::IOFile ShaderDiskCacheOpenGL::AppendTransferableFile() const {
return file;
}
FileUtil::IOFile ShaderDiskCacheOpenGL::AppendPrecompiledFile() const {
if (!EnsureDirectories())
return {};
void ShaderDiskCacheOpenGL::SavePrecompiledHeaderToVirtualPrecompiledCache() {
const auto hash{GetShaderCacheVersionHash()};
if (!SaveArrayToPrecompiled(hash.data(), hash.size())) {
LOG_ERROR(
Render_OpenGL,
"Failed to write precompiled cache version hash to virtual precompiled cache file");
}
}
void ShaderDiskCacheOpenGL::SaveVirtualPrecompiledFile() {
precompiled_cache_virtual_file_offset = 0;
const std::vector<u8>& precompiled_cache = precompiled_cache_virtual_file.ReadAllBytes();
const auto precompiled_path{GetPrecompiledPath()};
const bool existed = FileUtil::Exists(precompiled_path);
FileUtil::IOFile file(precompiled_path, "wb");
FileUtil::IOFile file(precompiled_path, "ab");
if (!file.IsOpen()) {
LOG_ERROR(Render_OpenGL, "Failed to open precompiled cache in path={}", precompiled_path);
return {};
return;
}
if (!existed || file.GetSize() == 0) {
const auto hash{GetShaderCacheVersionHash()};
if (file.WriteArray(hash.data(), hash.size()) != hash.size()) {
LOG_ERROR(Render_OpenGL, "Failed to write precompiled cache version hash in path={}",
precompiled_path);
return {};
}
if (file.WriteBytes(precompiled_cache.data(), precompiled_cache.size()) !=
precompiled_cache.size()) {
LOG_ERROR(Render_OpenGL, "Failed to write precompiled cache version in path={}",
precompiled_path);
return;
}
return file;
}
bool ShaderDiskCacheOpenGL::EnsureDirectories() const {

53
src/video_core/renderer_opengl/gl_shader_disk_cache.h
View file

@ -16,6 +16,7 @@
#include "common/assert.h"
#include "common/common_types.h"
#include "core/file_sys/vfs_vector.h"
#include "video_core/engines/maxwell_3d.h"
#include "video_core/renderer_opengl/gl_shader_gen.h"
@ -172,10 +173,10 @@ public:
LoadPrecompiled();
/// Removes the transferable (and precompiled) cache file.
void InvalidateTransferable() const;
void InvalidateTransferable();
/// Removes the precompiled cache file.
void InvalidatePrecompiled() const;
/// Removes the precompiled cache file and clears virtual precompiled cache file.
void InvalidatePrecompiled();
/// Saves a raw dump to the transferable file. Checks for collisions.
void SaveRaw(const ShaderDiskCacheRaw& entry);
@ -190,17 +191,21 @@ public:
/// Saves a dump entry to the precompiled file. Does not check for collisions.
void SaveDump(const ShaderDiskCacheUsage& usage, GLuint program);
/// Serializes virtual precompiled shader cache file to real file
void SaveVirtualPrecompiledFile();
private:
/// Loads the transferable cache. Returns empty on failure.
std::optional<std::pair<std::unordered_map<u64, ShaderDiskCacheDecompiled>,
std::unordered_map<ShaderDiskCacheUsage, ShaderDiskCacheDump>>>
LoadPrecompiledFile(FileUtil::IOFile& file);
/// Loads a decompiled cache entry from the passed file. Returns empty on failure.
std::optional<ShaderDiskCacheDecompiled> LoadDecompiledEntry(FileUtil::IOFile& file);
/// Loads a decompiled cache entry from m_precompiled_cache_virtual_file. Returns empty on
/// failure.
std::optional<ShaderDiskCacheDecompiled> LoadDecompiledEntry();
/// Saves a decompiled entry to the passed file. Returns true on success.
bool SaveDecompiledFile(FileUtil::IOFile& file, u64 unique_identifier, const std::string& code,
bool SaveDecompiledFile(u64 unique_identifier, const std::string& code,
const GLShader::ShaderEntries& entries);
/// Returns if the cache can be used
@ -209,8 +214,8 @@ private:
/// Opens current game's transferable file and write it's header if it doesn't exist
FileUtil::IOFile AppendTransferableFile() const;
/// Opens current game's precompiled file and write it's header if it doesn't exist
FileUtil::IOFile AppendPrecompiledFile() const;
/// Save precompiled header to precompiled_cache_in_memory
void SavePrecompiledHeaderToVirtualPrecompiledCache();
/// Create shader disk cache directories. Returns true on success.
bool EnsureDirectories() const;
@ -233,10 +238,42 @@ private:
/// Get current game's title id
std::string GetTitleID() const;
template <typename T>
bool SaveArrayToPrecompiled(const T* data, std::size_t length) {
const std::size_t write_length = precompiled_cache_virtual_file.WriteArray(
data, length, precompiled_cache_virtual_file_offset);
precompiled_cache_virtual_file_offset += write_length;
return write_length == sizeof(T) * length;
}
template <typename T>
bool LoadArrayFromPrecompiled(T* data, std::size_t length) {
const std::size_t read_length = precompiled_cache_virtual_file.ReadArray(
data, length, precompiled_cache_virtual_file_offset);
precompiled_cache_virtual_file_offset += read_length;
return read_length == sizeof(T) * length;
}
template <typename T>
bool SaveObjectToPrecompiled(const T& object) {
return SaveArrayToPrecompiled(&object, 1);
}
template <typename T>
bool LoadObjectFromPrecompiled(T& object) {
return LoadArrayFromPrecompiled(&object, 1);
}
// Copre system
Core::System& system;
// Stored transferable shaders
std::map<u64, std::unordered_set<ShaderDiskCacheUsage>> transferable;
// Stores whole precompiled cache which will be read from or saved to the precompiled chache
// file
FileSys::VectorVfsFile precompiled_cache_virtual_file;
// Stores the current offset of the precompiled cache file for IO purposes
std::size_t precompiled_cache_virtual_file_offset;
// The cache has been loaded at boot
bool tried_to_load{};
};