From 8cd5724a3adade76b05a521e4a5a6ec412c46f31 Mon Sep 17 00:00:00 2001
From: vsadov <8218165+VSadov@users.noreply.github.com>
Date: Sat, 18 Jun 2022 18:35:33 -0700
Subject: [PATCH] bucket tweaks

---
 src/coreclr/gc/satori/SatoriRecycler.cpp | 2 +-
 src/coreclr/gc/satori/SatoriRegion.cpp   | 4 ++--
 src/coreclr/gc/satori/SatoriRegion.h     | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/coreclr/gc/satori/SatoriRecycler.cpp b/src/coreclr/gc/satori/SatoriRecycler.cpp
index 4762ea2acb1..3f0873be322 100644
--- a/src/coreclr/gc/satori/SatoriRecycler.cpp
+++ b/src/coreclr/gc/satori/SatoriRecycler.cpp
@@ -3491,7 +3491,7 @@ void SatoriRecycler::KeepRegion(SatoriRegion* curRegion)
     // we will try reusing half-empty regions, unless they are too fragmented
     curRegion->ReusableFor() = SatoriRegion::ReuseLevel::None;
     if (curRegion->Occupancy() < Satori::REGION_SIZE_GRANULARITY / 2 &&
-        curRegion->HasFreeSpaceInTop4Buckets())
+        curRegion->HasFreeSpaceInTopNBuckets(IsLowLatencyMode() ? 6 : 2))
     {
         _ASSERTE(curRegion->Size() == Satori::REGION_SIZE_GRANULARITY);
 
diff --git a/src/coreclr/gc/satori/SatoriRegion.cpp b/src/coreclr/gc/satori/SatoriRegion.cpp
index 98fb804baa4..852c7a834ae 100644
--- a/src/coreclr/gc/satori/SatoriRegion.cpp
+++ b/src/coreclr/gc/satori/SatoriRegion.cpp
@@ -331,10 +331,10 @@ bool SatoriRegion::HasFreeSpaceInTopBucket()
     return m_freeLists[Satori::FREELIST_COUNT - 1];
 }
 
-bool SatoriRegion::HasFreeSpaceInTop4Buckets()
+bool SatoriRegion::HasFreeSpaceInTopNBuckets(int n)
 {
     //TUNING: more buckets means more aggressive demotion.
-    for (int bucket = Satori::FREELIST_COUNT -  4; bucket < Satori::FREELIST_COUNT; bucket++)
+    for (int bucket = Satori::FREELIST_COUNT -  n; bucket < Satori::FREELIST_COUNT; bucket++)
     {
         if (m_freeLists[bucket])
         {
diff --git a/src/coreclr/gc/satori/SatoriRegion.h b/src/coreclr/gc/satori/SatoriRegion.h
index 90323fb0b87..12f29f83878 100644
--- a/src/coreclr/gc/satori/SatoriRegion.h
+++ b/src/coreclr/gc/satori/SatoriRegion.h
@@ -79,7 +79,7 @@ public:
     void AddFreeSpace(SatoriObject* freeObj);
 
     bool HasFreeSpaceInTopBucket();
-    bool HasFreeSpaceInTop4Buckets();
+    bool HasFreeSpaceInTopNBuckets(int n);
 
     void StartEscapeTrackingRelease(size_t threadTag);
     void StopEscapeTracking();