OpenGL: Guarantee writes to Buffers.

src/video_core/renderer_opengl/gl_buffer_cache.cpp

@@ -52,7 +52,7 @@ Buffer OGLBufferCache::CreateBlock(VAddr cpu_addr, std::size_t size) {
 }
 
 void OGLBufferCache::WriteBarrier() {
-    glMemoryBarrier(GL_ALL_BARRIER_BITS);
+    glMemoryBarrier(GL_SHADER_STORAGE_BARRIER_BIT);
 }
 
 GLuint OGLBufferCache::ToHandle(const Buffer& buffer) {
@@ -72,6 +72,7 @@ void OGLBufferCache::UploadBlockData(const Buffer& buffer, std::size_t offset, s
 void OGLBufferCache::DownloadBlockData(const Buffer& buffer, std::size_t offset, std::size_t size,
                                        u8* data) {
     MICROPROFILE_SCOPE(OpenGL_Buffer_Download);
+    glMemoryBarrier(GL_BUFFER_UPDATE_BARRIER_BIT);
     glGetNamedBufferSubData(buffer->GetHandle(), static_cast<GLintptr>(offset),
                             static_cast<GLsizeiptr>(size), data);
 }

src/video_core/renderer_opengl/gl_rasterizer.cpp

@@ -630,7 +630,6 @@ void RasterizerOpenGL::DispatchCompute(GPUVAddr code_addr) {
     const auto& launch_desc = system.GPU().KeplerCompute().launch_description;
     glDispatchCompute(launch_desc.grid_dim_x, launch_desc.grid_dim_y, launch_desc.grid_dim_z);
     ++num_queued_commands;
-    system.GPU().TickWork();
 }
 
 void RasterizerOpenGL::ResetCounter(VideoCore::QueryType type) {

src/video_core/renderer_vulkan/vk_rasterizer.cpp

@@ -494,8 +494,6 @@ void RasterizerVulkan::DispatchCompute(GPUVAddr code_addr) {
                                   descriptor_set, {});
         cmdbuf.Dispatch(grid_x, grid_y, grid_z);
     });
-
-    system.GPU().TickWork();
 }
 
 void RasterizerVulkan::ResetCounter(VideoCore::QueryType type) {