Added RAM usage to linux overlay.

src/Cafe/HW/Latte/Core/LatteOverlay.cpp

@@ -585,16 +585,6 @@ static void UpdateStats_CpuPerCore()
 	}
 }
 
-static void UpdateStats_RamUsage()
-{
-#if BOOST_OS_WINDOWS
-	PROCESS_MEMORY_COUNTERS pmc{};
-	pmc.cb = sizeof(pmc);
-	GetProcessMemoryInfo(GetCurrentProcess(), &pmc, sizeof(pmc));
-	g_state.ram_usage = (pmc.WorkingSetSize / 1000) / 1000;
-#endif
-}
-
 void LatteOverlay_updateStats(double fps, sint32 drawcalls)
 {
 	if (GetConfig().overlay.position == ScreenPosition::kDisabled)
@@ -604,7 +594,9 @@ void LatteOverlay_updateStats(double fps, sint32 drawcalls)
 	g_state.draw_calls_per_frame = drawcalls;
 	UpdateStats_CemuCpu();
 	UpdateStats_CpuPerCore();
-	UpdateStats_RamUsage();
+
+	// update ram
+	g_state.ram_usage = (QueryRamUsage() / 1000) / 1000;
 
 	// update vram
 	g_renderer->GetVRAMInfo(g_state.vramUsage, g_state.vramTotal);

src/util/ProcessorTime/ProcessorTime.h

@@ -14,3 +14,5 @@ uint32_t GetProcessorCount();
 void QueryProcTime(uint64_t &out_now, uint64_t &out_user, uint64_t &out_kernel);
 void QueryProcTime(ProcessorTime &out);
 void QueryCoreTimes(uint32_t count, ProcessorTime out[]);
+
+uint64_t QueryRamUsage();

src/util/ProcessorTime/ProcessorTimeUnix.cpp

@@ -2,6 +2,7 @@
 
 #include "util/ProcessorTime/ProcessorTime.h"
 
+#include <unistd.h>
 #include <sys/time.h>
 #include <sys/times.h>
 #include <sys/resource.h>
@@ -41,4 +42,16 @@ void QueryCoreTimes(uint32_t count, ProcessorTime out[])
 	}
 }
 
+uint64_t QueryRamUsage()
+{
+	long page_size = sysconf(_SC_PAGESIZE);
+
+	std::ifstream file("/proc/self/statm");
+	file.ignore(std::numeric_limits<std::streamsize>::max(), ' ');
+	uint64_t no_pages;
+	file >> no_pages;
+
+	return no_pages * page_size;
+}
+
 #endif

src/util/ProcessorTime/ProcessorTimeWin.cpp

@@ -47,4 +47,12 @@ void QueryCoreTimes(uint32_t count, ProcessorTime out[])
 	}
 }
 
+uint64_t QueryRamUsage()
+{
+	PROCESS_MEMORY_COUNTERS pmc{};
+	pmc.cb = sizeof(pmc);
+	GetProcessMemoryInfo(GetCurrentProcess(), &pmc, sizeof(pmc));
+	return pmc.WorkingSetSize;
+}
+
 #endif