From 362020613672e9b260552807a3edf8cb58c23dee Mon Sep 17 00:00:00 2001
From: ameerj <aj662@drexel.edu>
Date: Thu, 29 Oct 2020 14:16:45 -0400
Subject: [PATCH] async_shaders: Increase Async worker thread count for 8+
 thread cpus

Adds 1 async worker thread for every 2 available threads above 8
---
 src/video_core/shader/async_shaders.cpp | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/src/video_core/shader/async_shaders.cpp b/src/video_core/shader/async_shaders.cpp
index aabd62c5c2..39cc3b8698 100644
--- a/src/video_core/shader/async_shaders.cpp
+++ b/src/video_core/shader/async_shaders.cpp
@@ -20,14 +20,15 @@ AsyncShaders::~AsyncShaders() {
 }
 
 void AsyncShaders::AllocateWorkers() {
-    // Max worker threads we should allow
-    constexpr u32 MAX_THREADS = 4;
-    // Deduce how many threads we can use
-    const u32 threads_used = std::thread::hardware_concurrency() / 4;
-    // Always allow at least 1 thread regardless of our settings
-    const auto max_worker_count = std::max(1U, threads_used);
-    // Don't use more than MAX_THREADS
-    const auto num_workers = std::min(max_worker_count, MAX_THREADS);
+    // Use at least one thread
+    u32 num_workers = 1;
+
+    // Deduce how many more threads we can use
+    const u32 thread_count = std::thread::hardware_concurrency();
+    if (thread_count >= 8) {
+        // Increase async workers by 1 for every 2 threads >= 8
+        num_workers += 1 + (thread_count - 8) / 2;
+    }
 
     // If we already have workers queued, ignore
     if (num_workers == worker_threads.size()) {