GS: Track hash cache memory usage

pcsx2/GS/GS.cpp

@@ -678,6 +678,20 @@ void GSgetStats(std::string& info)
 		info = format("%s Null", api_name);
 	}
 	else
+	{
+		if (GSConfig.TexturePreloading == TexturePreloadingLevel::Full)
+		{
+			info = format("%s HW | HC: %d MB | %d P | %d D | %d DC | %d RB | %d TC | %d TU",
+				api_name,
+				(int)std::ceil(static_cast<GSRendererHW*>(s_gs.get())->GetTextureCache()->GetHashCacheMemoryUsage() / 1048576.0f),
+				(int)pm.Get(GSPerfMon::Prim),
+				(int)pm.Get(GSPerfMon::Draw),
+				(int)std::ceil(pm.Get(GSPerfMon::DrawCalls)),
+				(int)std::ceil(pm.Get(GSPerfMon::Readbacks)),
+				(int)std::ceil(pm.Get(GSPerfMon::TextureCopies)),
+				(int)std::ceil(pm.Get(GSPerfMon::TextureUploads)));
+		}
+		else
 		{
 			info = format("%s HW | %d P | %d D | %d DC | %d RB | %d TC | %d TU",
 				api_name,
@@ -689,6 +703,7 @@ void GSgetStats(std::string& info)
 				(int)std::ceil(pm.Get(GSPerfMon::TextureUploads)));
 		}
 	}
+}
 
 void GSgetTitleStats(std::string& info)
 {

pcsx2/GS/Renderers/Common/GSTexture.h

@@ -137,5 +137,5 @@ public:
 	float OffsetHack_mody;
 
 	// Typical size of a RGBA texture
-	virtual u32 GetMemUsage() { return m_size.x * m_size.y * 4; }
+	virtual u32 GetMemUsage() { return m_size.x * m_size.y * (m_format == Format::UNorm8 ? 1 : 4); }
 };

pcsx2/GS/Renderers/HW/GSRendererHW.h

@@ -164,6 +164,8 @@ public:
 	GSRendererHW();
 	virtual ~GSRendererHW() override;
 
+	__fi GSTextureCache* GetTextureCache() const { return m_tc; }
+
 	void Destroy() override;
 
 	void SetGameCRC(u32 crc, int options) override;

pcsx2/GS/Renderers/HW/GSTextureCache.cpp

@@ -100,6 +100,7 @@ void GSTextureCache::RemoveAll()
 	for (auto it : m_hash_cache)
 		g_gs_device->Recycle(it.second.texture);
 	m_hash_cache.clear();
+	m_hash_cache_memory_usage = 0;
 
 	m_palette_map.Clear();
 }
@@ -1132,6 +1133,7 @@ void GSTextureCache::IncAge()
 		HashCacheEntry& e = it->second;
 		if (e.refcount == 0 && ++e.age > max_hash_cache_age)
 		{
+			m_hash_cache_memory_usage -= e.texture->GetMemUsage();
 			g_gs_device->Recycle(e.texture);
 			m_hash_cache.erase(it++);
 		}
@@ -1465,6 +1467,7 @@ GSTextureCache::Source* GSTextureCache::CreateSource(const GIFRegTEX0& TEX0, con
 				// insert it into the hash cache
 				HashCacheEntry entry{ src->m_texture, 1, 0 };
 				it = m_hash_cache.emplace(key, entry).first;
+				m_hash_cache_memory_usage += src->m_texture->GetMemUsage();
 			}
 			else
 			{

pcsx2/GS/Renderers/HW/GSTextureCache.h

@@ -275,6 +275,7 @@ protected:
 	PaletteMap m_palette_map;
 	SourceMap m_src;
 	std::unordered_map<HashCacheKey, HashCacheEntry, HashCacheKeyHash> m_hash_cache;
+	u64 m_hash_cache_memory_usage = 0;
 	FastList<Target*> m_dst[2];
 	bool m_preload_frame;
 	static u8* m_temp;
@@ -298,6 +299,9 @@ protected:
 public:
 	GSTextureCache(GSRenderer* r);
 	~GSTextureCache();
+
+	__fi u64 GetHashCacheMemoryUsage() const { return m_hash_cache_memory_usage; }
+
 	void Read(Target* t, const GSVector4i& r);
 	void Read(Source* t, const GSVector4i& r);
 	void RemoveAll();