From 3105b21909837f223207c461adfa0eb94286061b Mon Sep 17 00:00:00 2001
From: Nekotekina <nekotekina@gmail.com>
Date: Mon, 2 Mar 2020 20:17:48 +0300
Subject: [PATCH] Print PPU Syscall Usage Stats

* Every 10 seconds
* On normal exit
---
 rpcs3/Emu/Cell/PPUThread.cpp |  4 +--
 rpcs3/Emu/Cell/lv2/lv2.cpp   | 56 ++++++++++++++++++++++++++++++++++++
 2 files changed, 58 insertions(+), 2 deletions(-)

diff --git a/rpcs3/Emu/Cell/PPUThread.cpp b/rpcs3/Emu/Cell/PPUThread.cpp
index 458633ca289a..319226c864f3 100644
--- a/rpcs3/Emu/Cell/PPUThread.cpp
+++ b/rpcs3/Emu/Cell/PPUThread.cpp
@@ -1374,8 +1374,8 @@ extern void ppu_initialize(const ppu_module& info)
 		{
 			if (auto sc = ppu_get_syscall(index))
 			{
-				link_table.emplace(fmt::format("%s", ppu_syscall_code(index)), reinterpret_cast<u64>(sc));
-				link_table.emplace(fmt::format("syscall_%u", index), reinterpret_cast<u64>(sc));
+				link_table.emplace(fmt::format("%s", ppu_syscall_code(index)), reinterpret_cast<u64>(ppu_execute_syscall));
+				link_table.emplace(fmt::format("syscall_%u", index), reinterpret_cast<u64>(ppu_execute_syscall));
 			}
 		}
 
diff --git a/rpcs3/Emu/Cell/lv2/lv2.cpp b/rpcs3/Emu/Cell/lv2/lv2.cpp
index 65ab86cf617a..7b2ea967b06c 100644
--- a/rpcs3/Emu/Cell/lv2/lv2.cpp
+++ b/rpcs3/Emu/Cell/lv2/lv2.cpp
@@ -985,10 +985,66 @@ extern void ppu_initialize_syscalls()
 	g_ppu_syscall_table = s_ppu_syscall_table;
 }
 
+class ppu_syscall_usage
+{
+	// Internal buffer
+	std::string m_stats;
+
+public:
+	// Public info collection buffers
+	atomic_t<u64> stat[1024]{};
+
+	void print_stats() noexcept
+	{
+		std::multimap<u64, u64, std::greater<u64>> usage;
+
+		for (u32 i = 0; i < 1024; i++)
+		{
+			if (u64 v = stat[i])
+			{
+				// Only add syscalls with non-zero usage counter
+				usage.emplace(v, i);
+			}
+		}
+
+		m_stats.clear();
+
+		for (auto&& pair : usage)
+		{
+			fmt::append(m_stats, u8"\n\t⁂ %s [%u]", ppu_get_syscall_name(pair.second), pair.first);
+		}
+
+		ppu_log.notice("PPU Syscall Usage Stats: %s", m_stats);
+	}
+
+	void operator()()
+	{
+		while (thread_ctrl::state() != thread_state::aborting)
+		{
+			std::this_thread::sleep_for(10s);
+			print_stats();
+		}
+	}
+
+	~ppu_syscall_usage()
+	{
+		print_stats();
+	}
+
+	static constexpr auto thread_name = "PPU Syscall Usage Thread"sv;
+};
+
 extern void ppu_execute_syscall(ppu_thread& ppu, u64 code)
 {
+	if (g_cfg.core.ppu_decoder == ppu_decoder_type::llvm)
+	{
+		code = ppu.gpr[11];
+	}
+
 	if (code < g_ppu_syscall_table.size())
 	{
+		g_fxo->get<named_thread<ppu_syscall_usage>>()->stat[code]++;
+
 		if (auto func = g_ppu_syscall_table[code])
 		{
 			func(ppu);