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[MG_Backend, MG_Remote, MG_Test] (Disaggregated): P5f fs - isolate context epochs and server liveness

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swung0x48
2026-09-19 23:44:03 -04:00
parent 4667e13be6
commit 12a9b13894
11 changed files with 405 additions and 4 deletions
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MobileGL/MG_Backend/DirectGLES/DirectGLES.cpp
+123 -2
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@@ -7,6 +7,7 @@
// End of Source File Header
#include "DirectGLES.h"
#include "ContextEpoch.h"
#include "EGL/egl.h"
#include "MG_Util/Types.h"
#include "Utils.h"
@@ -308,6 +309,25 @@ namespace MobileGL::MG_Backend::DirectGLES {
// grep and a comment naming it is a hit) and for an MG_State type inside
// MGPipeResourceOps, and this is neither.
SamplerImpl::BackendSamplerObject* GetRawDepthFetchSampler() {
#if MOBILEGL_BUILD_DISAGGREGATED
if (MG_Config::Transport != MG_Config::TransportMode::Monolith) {
static UniquePtr<SamplerImpl::BackendSamplerObject> native;
static Uint generation = 0;
if (generation != g_backendContextGeneration) {
native.reset(); // old generation's destructor never deletes a successor id
generation = g_backendContextGeneration;
}
if (!native) {
native = MakeUnique<SamplerImpl::BackendSamplerObject>();
const GLuint id = native->GetBackendSamplerId();
g_GLESFuncs.glSamplerParameteri(id, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
g_GLESFuncs.glSamplerParameteri(id, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
g_GLESFuncs.glSamplerParameteri(id, GL_TEXTURE_COMPARE_MODE, GL_NONE);
g_GLESFuncs.glSamplerParameteri(id, GL_TEXTURE_COMPARE_FUNC, GL_ALWAYS);
}
return native.get();
}
#endif
if (!g_rawDepthFetchSamplerState) {
g_rawDepthFetchSamplerState = MakeShared<MG_State::GLState::SamplerObject>(0);
g_rawDepthFetchSamplerState->SetMinFilter(SamplerFilterMode::Nearest);
@@ -1600,7 +1620,50 @@ namespace MobileGL::MG_Backend::DirectGLES {
// null instead of reasoning about stability, and CurrentXfb re-resolves lazily.
XfbObjectState* g_currentXfbState = nullptr;
#if MOBILEGL_BUILD_DISAGGREGATED
struct RoleXfbState {
Uint NativeGeneration = 0;
// Server keys are record-supplied, never-reused XFB lifetime ids.
// The monolith role keeps its existing GL-name semantics separately.
UnorderedMap<Uint64, XfbObjectState> Objects;
Uint64 Current = 0;
XfbObjectState* Cached = nullptr;
GLuint ScatterBuffer = 0;
SizeT ScatterSize = 0;
Bool NeedsBind = true;
};
Array<RoleXfbState, 2> g_roleXfbState;
Int g_activeXfbRole = -1;
RoleXfbState& ActiveXfbState() {
const Int role = MG_Config::Transport != MG_Config::TransportMode::Monolith;
auto& state = g_roleXfbState[role];
if (state.NativeGeneration != g_backendContextGeneration) {
state = {};
state.NativeGeneration = g_backendContextGeneration;
}
if (g_activeXfbRole != role) {
state.NeedsBind = true;
g_activeXfbRole = role;
}
return state;
}
#endif
XfbObjectState& CurrentXfb() {
#if MOBILEGL_BUILD_DISAGGREGATED
auto& state = ActiveXfbState();
if (MG_Config::Transport != MG_Config::TransportMode::Monolith) {
const Uint64 lifetime = MG_Pipe::MGPipeApplier().BoundStreamOutputLifetimeId;
if (state.Current != lifetime || state.Cached == nullptr || state.NeedsBind)
BindTransformFeedback(0); // identity is the applier's lifetime, not this argument
} else if (state.NeedsBind) {
BindTransformFeedback(static_cast<GLuint>(state.Current));
}
auto& g_currentXfbState = state.Cached;
auto& g_xfbObjects = state.Objects;
const auto g_currentXfbName = state.Current;
#endif
if (g_currentXfbState == nullptr) {
g_currentXfbState = &g_xfbObjects[g_currentXfbName];
}
@@ -1734,6 +1797,10 @@ namespace MobileGL::MG_Backend::DirectGLES {
// scratch storage cannot be provided, in which case the caller falls back to the
// direct binding (which produces a wrong layout, but is what happened before).
Bool BindScatterCaptureBuffer(SizeT packedStride, SizeT capacityVertices) {
#if MOBILEGL_BUILD_DISAGGREGATED
auto& g_scatterBufferId = ActiveXfbState().ScatterBuffer;
auto& g_scatterBufferSize = ActiveXfbState().ScatterSize;
#endif
if (packedStride == 0 || capacityVertices == 0) return false;
if (g_GLESFuncs.glGenBuffers == nullptr || g_GLESFuncs.glBufferData == nullptr) return false;
const SizeT required = packedStride * capacityVertices;
@@ -1770,6 +1837,9 @@ namespace MobileGL::MG_Backend::DirectGLES {
// occupies are written, so the holes gl_SkipComponents asks for keep whatever the
// application had put there - which is the whole point of the feature.
void ScatterCapturedRecords(XfbObjectState& xfb) {
#if MOBILEGL_BUILD_DISAGGREGATED
auto& g_scatterBufferId = ActiveXfbState().ScatterBuffer;
#endif
#if MOBILEGL_BUILD_DISAGGREGATED
const XfbProgramSource program{xfb.scatterProgram, xfb.scatterArchive};
#else
@@ -2126,6 +2196,15 @@ namespace MobileGL::MG_Backend::DirectGLES {
}
void BindTransformFeedback(GLuint name) {
#if MOBILEGL_BUILD_DISAGGREGATED
auto& roleState = ActiveXfbState();
auto& g_currentXfbState = roleState.Cached;
auto& g_xfbObjects = roleState.Objects;
auto& g_currentXfbName = roleState.Current;
const Bool server = MG_Config::Transport != MG_Config::TransportMode::Monolith;
const Uint64 key = server ? MG_Pipe::MGPipeApplier().BoundStreamOutputLifetimeId : name;
roleState.NeedsBind = false;
#endif
g_currentXfbState = nullptr; // name changes; operator[] below may also rehash
// The capture buffer bindings are the OBJECT's, not the context's: the bind below
// swaps all of them for whatever the target object holds, which the redundant-bind
@@ -2134,18 +2213,44 @@ namespace MobileGL::MG_Backend::DirectGLES {
if (!AreTransformFeedbackObjectsSupported()) {
// Without driver objects there is only the default span; keep the frontend
// name so the bookkeeping below stays consistent.
g_currentXfbName = name;
g_currentXfbName =
#if MOBILEGL_BUILD_DISAGGREGATED
key;
#else
name;
#endif
return;
}
#if MOBILEGL_BUILD_DISAGGREGATED
auto& xfb = g_xfbObjects[key];
// Even each virtual context's name-0 object gets its own native object.
if ((server || name != 0) && xfb.esId == 0) {
#else
auto& xfb = g_xfbObjects[name];
if (name != 0 && xfb.esId == 0) {
#endif
g_GLESFuncs.glGenTransformFeedbacks(1, &xfb.esId);
}
g_GLESFuncs.glBindTransformFeedback(GL_TRANSFORM_FEEDBACK, xfb.esId);
g_currentXfbName = name;
g_currentXfbName =
#if MOBILEGL_BUILD_DISAGGREGATED
key;
#else
name;
#endif
}
void DeleteTransformFeedback(GLuint name) {
#if MOBILEGL_BUILD_DISAGGREGATED
// No delete_stream_output opcode exists yet; the client refuses this class-C
// verb before emission. Never reinterpret its GL name as a lifetime id.
if (MG_Config::Transport != MG_Config::TransportMode::Monolith)
MG_Pipe::MGPipeUnmigratedEmulation("delete-transform-feedback");
auto& roleState = ActiveXfbState();
auto& g_currentXfbState = roleState.Cached;
auto& g_xfbObjects = roleState.Objects;
auto& g_currentXfbName = roleState.Current;
#endif
const auto it = g_xfbObjects.find(name);
if (it == g_xfbObjects.end()) return;
if (it->second.esId != 0 && g_GLESFuncs.glDeleteTransformFeedbacks != nullptr) {
@@ -2162,6 +2267,10 @@ namespace MobileGL::MG_Backend::DirectGLES {
// The ES context went away (or is being torn down): the spans, their buffer ids, the
// driver objects and the frontend objects they pinned all belonged to it.
void OnBackendContextDestroyed() {
#if MOBILEGL_BUILD_DISAGGREGATED
for (auto& state : g_roleXfbState) state = {};
g_activeXfbRole = -1;
#endif
g_currentXfbState = nullptr;
g_xfbObjects.clear();
g_currentXfbName = 0;
@@ -4719,6 +4828,14 @@ namespace MobileGL::MG_Backend::DirectGLES {
g_syncedBackendScissorBox = IntVec4(-1, -1, -1, -1);
}
void SyncRenderState(Bool forColorClear) {
#if MOBILEGL_BUILD_DISAGGREGATED
static ContextEpoch syncedEpoch{};
const auto epoch = CurrentContextEpoch();
if (syncedEpoch != epoch) {
InvalidateSyncedRenderState();
syncedEpoch = epoch;
}
#endif
#ifdef TRACY_ENABLE
ZoneScopedC(TRACY_ZONECOLOR_BACKEND);
#endif
@@ -16041,6 +16158,10 @@ namespace MobileGL::MG_Backend::DirectGLES {
}
void DestroyEGLContext() {
#if MOBILEGL_BUILD_DISAGGREGATED
if (MG_Config::Transport != MG_Config::TransportMode::Monolith)
MG_Pipe::MGPipeServerSetContextLive(false);
#endif
BufferImpl::OnBackendContextDestroyed();
XfbImpl::OnBackendContextDestroyed();
MultiDrawImpl::OnBackendContextDestroyed();