Streamer memory management bug fixes and experimental low memory warning handler in progress.

KREngine/kraken/KRContext.cpp

@@ -322,7 +322,7 @@ void KRContext::getMemoryStats(long &free_memory)
     } else {
         total_ram = (vm_stat.wire_count + vm_stat.active_count + vm_stat.inactive_count + vm_stat.free_count) * pagesize;
         
-        free_memory = vm_stat.free_count * pagesize;
+        free_memory = (vm_stat.free_count + vm_stat.inactive_count) * pagesize;
     }
 #else
 #error Unsupported Platform
@@ -332,17 +332,52 @@ void KRContext::getMemoryStats(long &free_memory)
 void KRContext::doStreaming()
 {
     if(m_streamingEnabled) {
-        const long MEMORY_WARNING_THROTTLE_FRAMES = 15;
+        /*
+        long free_memory = KRENGINE_GPU_MEM_TARGET;
+        long total_memory = KRENGINE_GPU_MEM_MAX;
+        */
+        /*
+#if TARGET_OS_IPHONE
+        // FINDME, TODO, HACK! - Experimental code, need to expose through engine parameters
+        const long KRENGINE_RESERVE_MEMORY = 0x4000000; // 64MB
         
+        getMemoryStats(free_memory);
+        free_memory = KRCLAMP(free_memory - KRENGINE_RESERVE_MEMORY, 0, KRENGINE_GPU_MEM_TARGET);
+        total_memory = KRMIN(KRENGINE_GPU_MEM_MAX, free_memory * 3 / 4 + m_pTextureManager->getMemUsed() + m_pMeshManager->getMemUsed());
+        
+#endif
+        */
+        /*
+        // FINDME, TODO - Experimental code, need to expose through engine parameters
+        const long MEMORY_WARNING_THROTTLE_FRAMES = 5;
         bool memory_warning_throttle = m_last_memory_warning_frame != 0 && m_current_frame - m_last_memory_warning_frame < MEMORY_WARNING_THROTTLE_FRAMES;
+        if(memory_warning_throttle) {
+            free_memory = 0;
+        }
+        */
+        
+        /*
+        // FINDME, TODO - Experimental code, need to expose through engine parameters
+        const long MEMORY_WARNING_THROTTLE2_FRAMES = 30;
+        bool memory_warning_throttle2 = m_last_memory_warning_frame != 0 && m_current_frame - m_last_memory_warning_frame < MEMORY_WARNING_THROTTLE2_FRAMES;
+        if(memory_warning_throttle2) {
+            total_memory /= 2;
+            free_memory /= 2;
+        }
+        */
+        
+        /*
+        m_pMeshManager->doStreaming(total_memory, free_memory);
+        m_pTextureManager->doStreaming(total_memory, free_memory);
+        */
+        
         
         long memoryRemaining = KRENGINE_GPU_MEM_TARGET;
         long memoryRemainingThisFrame = KRENGINE_GPU_MEM_MAX - m_pTextureManager->getMemUsed() - m_pMeshManager->getMemUsed();
+
+        m_pMeshManager->doStreaming(memoryRemaining, memoryRemainingThisFrame);
+        m_pTextureManager->doStreaming(memoryRemaining, memoryRemainingThisFrame);
         
-        if(!memory_warning_throttle) {
-            m_pMeshManager->doStreaming(memoryRemaining, memoryRemainingThisFrame);
-            m_pTextureManager->doStreaming(memoryRemaining, memoryRemainingThisFrame);
-        }
     }
 }
 

KREngine/kraken/KREngine.mm

@@ -89,7 +89,7 @@ void kraken::set_debug_text(const std::string &print_text)
     }
     
     
-    KRContext::KRENGINE_MAX_SHADER_HANDLES = 4000;
+    KRContext::KRENGINE_MAX_SHADER_HANDLES = 1000;
     KRContext::KRENGINE_MAX_TEXTURE_DIM = 2048;
     KRContext::KRENGINE_MIN_TEXTURE_DIM = 64;
     KRContext::KRENGINE_PRESTREAM_DISTANCE = 1000.0f;

KREngine/kraken/KRMeshManager.cpp

@@ -217,17 +217,9 @@ void KRMeshManager::startFrame(float deltaTime)
                 
                 switch(activeVBO->getType()) {
                     case KRVBOData::STREAMING:
-                        // TODO - Move to KRVBOData::unload()
-                        if(activeVBO->isVBOLoaded()) {
-                            m_vboMemUsed -= activeVBO->getSize();
-                        }
                         activeVBO->unload();
                         break;
                     case KRVBOData::TEMPORARY:
-                        // TODO - Move to KRVBOData::unload()
-                        if(activeVBO->isVBOLoaded()) {
-                            m_vboMemUsed -= activeVBO->getSize();
-                        }
                         delete activeVBO;
                         break;
                     case KRVBOData::CONSTANT:
@@ -299,8 +291,8 @@ void KRMeshManager::balanceVBOMemory(long &memoryRemaining, long &memoryRemainin
             if(memoryRemainingThisFrame > vbo_size) {
                 vbo_data->load();
                 memoryRemainingThisFrame -= vbo_size;
-                memoryRemaining -= vbo_size;
             }
+            memoryRemaining -= vbo_size;
         }
     }
     
@@ -622,6 +614,10 @@ void KRMeshManager::KRVBOData::load()
     }
     
     m_is_vbo_loaded = true;
+
+    m_manager->m_vboMemUsed += getSize();
+    m_manager->m_memoryTransferredThisFrame += getSize();
+    
     if(m_type == CONSTANT) {
         _swapHandles();
     }
@@ -629,6 +625,10 @@ void KRMeshManager::KRVBOData::load()
 
 void KRMeshManager::KRVBOData::unload()
 {
+    if(isVBOLoaded()) {
+        m_manager->m_vboMemUsed -= getSize();
+    }
+    
 #if GL_OES_vertex_array_object
     if(m_vao_handle != -1) {
         GLDEBUG(glDeleteVertexArraysOES(1, &m_vao_handle));

KREngine/kraken/KRMeshManager.h

@@ -88,7 +88,7 @@ public:
         KRVBOData(const KRVBOData& o) = delete;
         KRVBOData(KRVBOData& o) = delete;
         
-        bool getSize() { return m_size; }
+        long getSize() { return m_size; }
         
         void resetPoolExpiry(float lodCoverage);
         long getLastFrameUsed() { return m_last_frame_used; }