From 4a00d738bbbbb122d26acbce722b3f6c148d8860 Mon Sep 17 00:00:00 2001
From: Andrew Au <andrewau@microsoft.com>
Date: Wed, 5 Jan 2022 11:38:31 -0800
Subject: [PATCH] Avoiding Bimodal GC behavior

---
 src/coreclr/gc/gc.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/coreclr/gc/gc.cpp b/src/coreclr/gc/gc.cpp
index ace66eac266709..19bc249834576e 100644
--- a/src/coreclr/gc/gc.cpp
+++ b/src/coreclr/gc/gc.cpp
@@ -19699,7 +19699,9 @@ int gc_heap::generation_to_condemn (int n_initial,
 
     if (dt_low_ephemeral_space_p (check_only_p ?
                                   tuning_deciding_full_gc :
-                                  tuning_deciding_condemned_gen))
+                                  tuning_deciding_condemned_gen) &&
+        (generation_free_list_space (generation_of (0)) < 1000000)
+       )
     {
         low_ephemeral_space = TRUE;