From ec7d243ee942a56a76f7f0a1734f92aea7de7b95 Mon Sep 17 00:00:00 2001
From: Nekotekina <nekotekina@gmail.com>
Date: Sat, 10 Oct 2020 14:22:12 +0300
Subject: [PATCH] More optimization for cpu_thread::suspend_all

Try to not pause inactive threads.
---
 rpcs3/Emu/CPU/CPUThread.cpp | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/rpcs3/Emu/CPU/CPUThread.cpp b/rpcs3/Emu/CPU/CPUThread.cpp
index 2e9d82b7a8..98bdbe29af 100644
--- a/rpcs3/Emu/CPU/CPUThread.cpp
+++ b/rpcs3/Emu/CPU/CPUThread.cpp
@@ -605,6 +605,13 @@ bool cpu_thread::check_state() noexcept
 
 		if (escape)
 		{
+			if (s_tls_thread_slot == umax)
+			{
+				// Restore thread in the suspend list
+				std::lock_guard lock(g_fxo->get<cpu_counter>()->cpu_suspend_lock);
+				s_tls_thread_slot = g_fxo->get<cpu_counter>()->add(this, true);
+			}
+
 			return retval;
 		}
 
@@ -612,6 +619,15 @@ bool cpu_thread::check_state() noexcept
 		{
 			cpu_sleep();
 			cpu_sleep_called = true;
+
+			if (s_tls_thread_slot != umax)
+			{
+				// Exclude inactive threads from the suspend list (optimization)
+				std::lock_guard lock(g_fxo->get<cpu_counter>()->cpu_suspend_lock);
+				g_fxo->get<cpu_counter>()->remove(this);
+				s_tls_thread_slot = -1;
+			}
+
 			continue;
 		}