Add kernelstats

Useful for finding out if some syscall takes unexpectedly much CPU.

Core/HLE/HLE.cpp

@@ -15,6 +15,7 @@
 // Official git repository and contact information can be found at
 // https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
 
+#include "base/timeutil.h"
 #include "HLE.h"
 #include <map>
 #include <vector>
@@ -344,6 +345,8 @@ inline void hleFinishSyscall(int modulenum, int funcnum)
 
 void CallSyscall(u32 op)
 {
+	time_update();
+	double start = time_now_d();
 	u32 callno = (op >> 6) & 0xFFFFF; //20 bits
 	int funcnum = callno & 0xFFF;
 	int modulenum = (callno & 0xFF000) >> 12;
@@ -365,4 +368,14 @@ void CallSyscall(u32 op)
 	{
 		ERROR_LOG(HLE,"Unimplemented HLE function %s", moduleDB[modulenum].funcTable[funcnum].name);
 	}
+	time_update();
+	double total = time_now_d() - start;
+	if (total > kernelStats.slowestSyscallTime) {
+		const char *name = moduleDB[modulenum].funcTable[funcnum].name;
+		if (0 != strcmp(name, "_sceKernelIdle")) {
+			kernelStats.slowestSyscallTime = total;
+			kernelStats.slowestSyscallName = name;
+		}
+	}
+	kernelStats.msInSyscalls += total;
 }

Core/HLE/sceKernel.cpp

@@ -71,6 +71,7 @@
 
 static bool kernelRunning = false;
 KernelObjectPool kernelObjects;
+KernelStats kernelStats;
 
 void __KernelInit()
 {

Core/HLE/sceKernel.h

@@ -377,6 +377,7 @@ public:
 			return t;
 		}
 	}
+
 	template <class T>
 	T* GetByModuleByEntryAddr(u32 entryAddr)
 	{
@@ -410,13 +411,32 @@ public:
 	int GetCount();
 
 private:
-	enum {maxCount=4096, handleOffset=0x100};
+	enum {
+		maxCount=4096,
+		handleOffset=0x100
+	};
 	KernelObject *pool[maxCount];
 	bool occupied[maxCount];
 };
 
 extern KernelObjectPool kernelObjects;
 
+struct KernelStats {
+	void Reset() {
+		memset(this, 0, sizeof(this));
+	}
+	void ResetFrame() {
+		msInSyscalls = 0;
+		slowestSyscallTime = 0;
+		slowestSyscallName = 0;
+	}
+
+	double msInSyscalls;
+	double slowestSyscallTime;
+	const char *slowestSyscallName;
+};
+
+extern KernelStats kernelStats;
 
 void Register_ThreadManForUser();
 void Register_LoadExecForUser();