From 56223423e5f81264371b76ab9476229716df8d91 Mon Sep 17 00:00:00 2001
From: Manish Godse <61718172+mangod9@users.noreply.github.com>
Date: Thu, 16 Mar 2023 14:46:36 -0700
Subject: [PATCH] fix a bug where totalCPU count was being used for cachesize
 computation (#83528)

---
 src/coreclr/gc/unix/gcenv.unix.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/coreclr/gc/unix/gcenv.unix.cpp b/src/coreclr/gc/unix/gcenv.unix.cpp
index cb32959c4ef..9590a9e73d0 100644
--- a/src/coreclr/gc/unix/gcenv.unix.cpp
+++ b/src/coreclr/gc/unix/gcenv.unix.cpp
@@ -865,7 +865,7 @@ static size_t GetLogicalProcessorCacheSizeFromOS()
         // Estimate cache size based on CPU count
         // Assume lower core count are lighter weight parts which are likely to have smaller caches
         // Assume L3$/CPU grows linearly from 256K to 1.5M/CPU as logicalCPUs grows from 2 to 12 CPUs
-        DWORD logicalCPUs = g_totalCpuCount;
+        DWORD logicalCPUs = g_processAffinitySet.Count();
 
         cacheSize = logicalCPUs * std::min(1536, std::max(256, (int)logicalCPUs * 128)) * 1024;
     }
@@ -903,7 +903,7 @@ static size_t GetLogicalProcessorCacheSizeFromOS()
         // 5 ~ 16  :  8 MB
         // 17 ~ 64 : 16 MB
         // 65+     : 32 MB
-        DWORD logicalCPUs = g_totalCpuCount;
+        DWORD logicalCPUs = g_processAffinitySet.Count();
         if (logicalCPUs < 5)
         {
             cacheSize = 4;
-- 
2.34.1