From cdb4ba9657ceae426281ead96aa4a125c7b97e6f Mon Sep 17 00:00:00 2001
From: Axel Boldt-Christmas <aboldtch@openjdk.org>
Date: Tue, 31 Jan 2023 07:54:20 +0000
Subject: [PATCH] 8301326: Optimize compiler/uncommontrap/TestDeoptOOM.java
 test

Reviewed-by: rcastanedalo, thartmann
---
 .../compiler/uncommontrap/TestDeoptOOM.java   | 25 +++++++++++--------
 1 file changed, 15 insertions(+), 10 deletions(-)

diff --git a/test/hotspot/jtreg/compiler/uncommontrap/TestDeoptOOM.java b/test/hotspot/jtreg/compiler/uncommontrap/TestDeoptOOM.java
index 8692fc924ae..2f9a456996f 100644
--- a/test/hotspot/jtreg/compiler/uncommontrap/TestDeoptOOM.java
+++ b/test/hotspot/jtreg/compiler/uncommontrap/TestDeoptOOM.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2014, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -67,19 +67,24 @@ public class TestDeoptOOM {
 
     static LinkedList ll;
 
-    static void consume_all_memory() {
-        int size = 128 * 1024 * 1024;
-        while(size > 0) {
-            try {
-                while(true) {
-                    ll = new LinkedList(ll, size);
-                }
-            } catch(OutOfMemoryError oom) {
+    static void alloc_in_chunks(int size) {
+        try {
+            while(true) {
+                ll = new LinkedList(ll, size);
             }
-            size = size / 2;
+        } catch(OutOfMemoryError oom) {
         }
     }
 
+    static void consume_all_memory() {
+        // O(MiB) allocations
+        alloc_in_chunks(1024*1024);
+        // O(KiB) allocations
+        alloc_in_chunks(1024);
+        // O(B) allocations
+        alloc_in_chunks(1);
+    }
+
     static void free_memory() {
         ll = null;
     }