feat: 内存管理可以设置初始大小和最大大小

PCL.Core/App/Config.cs

@@ -480,6 +480,11 @@ partial class HideConfigGroup
         /// </summary>
         [ConfigItem<int>("LaunchRamCustom", 15, ConfigSource.Local)] public partial int CustomMemorySize { get; set; }
 
+        /// <summary>
+        /// 自定义初始堆大小（-Xms）的滑块刻度值，0 表示不主动设置。仅在手动分配模式下生效，且实际值不会超过最大堆。
+        /// </summary>
+        [ConfigItem<int>("LaunchRamCustomInitial", 0, ConfigSource.Local)] public partial int CustomInitialMemorySize { get; set; }
+
         /// <summary>
         /// 是否固定堆大小：启用后额外追加 -Xms 并使其等于 -Xmx，隐式禁用内存归还以降低延迟抖动、利于 ZGC。见 #3282。
         /// </summary>
@@ -619,6 +624,7 @@ partial class HideConfigGroup
         [ConfigItem<bool>("VersionUseDebugLog4j2Config", false)] public partial ArgConfig<bool> UseDebugLof4j2Config { get; }
         [ConfigItem<int>("VersionRamType", 2)] public partial ArgConfig<int> MemorySolution { get; }
         [ConfigItem<int>("VersionRamCustom", 15)] public partial ArgConfig<int> CustomMemorySize { get; }
+        [ConfigItem<int>("VersionRamCustomInitial", 0)] public partial ArgConfig<int> CustomInitialMemorySize { get; }
         [ConfigItem<string>("VersionArgumentTitle", "")] public partial ArgConfig<string> Title { get; }
         [ConfigItem<bool>("VersionArgumentTitleEmpty", false)] public partial ArgConfig<bool> UseGlobalTitle { get; }
         [ConfigItem<string>("VersionArgumentInfo", "")] public partial ArgConfig<string> TypeInfo { get; }

PCL.Core/App/Localization/Languages/en-GB.xaml

@@ -2768,6 +2768,11 @@
     <sys:String x:Key="Setup.Launch.Memory.Auto.ToolTip">Dynamically adjust the memory allocated to the game based on the installed mods and available system memory.</sys:String>
     <sys:String x:Key="Setup.Launch.Memory.AvailableSuffix">Available: {0} GiB</sys:String>
     <sys:String x:Key="Setup.Launch.Memory.GameAllocation">Game allocation</sys:String>
+    <sys:String x:Key="Setup.Launch.Memory.Max">Maximum memory (-Xmx)</sys:String>
+    <sys:String x:Key="Setup.Launch.Memory.Max.ToolTip">The maximum heap memory the game can use</sys:String>
+    <sys:String x:Key="Setup.Launch.Memory.Initial">Initial memory (-Xms)</sys:String>
+    <sys:String x:Key="Setup.Launch.Memory.Initial.ToolTip">The heap memory pre-allocated when the game starts, which can be lower than the maximum heap (-Xmx). Set to 0 to let the JVM decide. Only takes effect when memory allocation is set to Custom, and has no effect when Lock memory allocation is enabled.</sys:String>
+    <sys:String x:Key="Setup.Launch.Memory.InitialSuffix">initial {0} GiB</sys:String>
     <sys:String x:Key="Setup.Launch.Memory.Title">Game memory</sys:String>
     <sys:String x:Key="Setup.Launch.Memory.UsedTotal">Used / installed memory</sys:String>
     <sys:String x:Key="Setup.Launch.Memory.Warning.Java32Bit">32-bit Java can only allocate up to 1 GiB of memory. It is strongly recommended to use 64-bit Java!</sys:String>

PCL.Core/App/Localization/Languages/en-US.xaml

@@ -2768,6 +2768,11 @@
     <sys:String x:Key="Setup.Launch.Memory.Auto.ToolTip">Dynamically adjust the memory allocated to the game based on the installed mods and available system memory.</sys:String>
     <sys:String x:Key="Setup.Launch.Memory.AvailableSuffix">Available: {0} GiB</sys:String>
     <sys:String x:Key="Setup.Launch.Memory.GameAllocation">Game allocation</sys:String>
+    <sys:String x:Key="Setup.Launch.Memory.Max">Maximum memory (-Xmx)</sys:String>
+    <sys:String x:Key="Setup.Launch.Memory.Max.ToolTip">The maximum heap memory the game can use</sys:String>
+    <sys:String x:Key="Setup.Launch.Memory.Initial">Initial memory (-Xms)</sys:String>
+    <sys:String x:Key="Setup.Launch.Memory.Initial.ToolTip">The heap memory pre-allocated when the game starts, which can be lower than the maximum heap (-Xmx). Set to 0 to let the JVM decide. Only takes effect when memory allocation is set to Custom, and has no effect when Lock memory allocation is enabled.</sys:String>
+    <sys:String x:Key="Setup.Launch.Memory.InitialSuffix">initial {0} GiB</sys:String>
     <sys:String x:Key="Setup.Launch.Memory.Title">Game memory</sys:String>
     <sys:String x:Key="Setup.Launch.Memory.UsedTotal">Used / installed memory</sys:String>
     <sys:String x:Key="Setup.Launch.Memory.Warning.Java32Bit">32-bit Java can only allocate up to 1 GiB of memory. It is strongly recommended to use 64-bit Java!</sys:String>

PCL.Core/App/Localization/Languages/zh-CN.xaml

@@ -2768,6 +2768,11 @@
     <sys:String x:Key="Setup.Launch.Memory.Auto.ToolTip">根据安装的模组量与电脑剩余内存，动态调整为游戏分配的内存</sys:String>
     <sys:String x:Key="Setup.Launch.Memory.AvailableSuffix">可用 {0} GiB</sys:String>
     <sys:String x:Key="Setup.Launch.Memory.GameAllocation">游戏分配</sys:String>
+    <sys:String x:Key="Setup.Launch.Memory.Max">最大内存（-Xmx）</sys:String>
+    <sys:String x:Key="Setup.Launch.Memory.Max.ToolTip">游戏可使用的最大堆内存大小</sys:String>
+    <sys:String x:Key="Setup.Launch.Memory.Initial">初始内存（-Xms）</sys:String>
+    <sys:String x:Key="Setup.Launch.Memory.Initial.ToolTip">游戏启动时预先分配的堆内存大小，可以低于最大堆（-Xmx）。设为 0 表示不主动设置，由 JVM 自行决定。仅在手动配置内存分配时生效，启用「锁定内存分配」时不生效。</sys:String>
+    <sys:String x:Key="Setup.Launch.Memory.InitialSuffix">初始 {0} GiB</sys:String>
     <sys:String x:Key="Setup.Launch.Memory.Title">游戏内存</sys:String>
     <sys:String x:Key="Setup.Launch.Memory.UsedTotal">已使用内存 / 已安装内存</sys:String>
     <sys:String x:Key="Setup.Launch.Memory.Warning.Java32Bit">32 位 Java 只能分配最多 1 GiB 的内存。强烈建议换用 64 位的 Java！</sys:String>

PCL.Core/App/Localization/Languages/zh-TW.xaml

@@ -2768,6 +2768,11 @@
     <sys:String x:Key="Setup.Launch.Memory.Auto.ToolTip">根據安裝的模組量與電腦剩餘記憶體，動態調整為遊戲分配的記憶體</sys:String>
     <sys:String x:Key="Setup.Launch.Memory.AvailableSuffix">可用 {0} GiB</sys:String>
     <sys:String x:Key="Setup.Launch.Memory.GameAllocation">遊戲分配</sys:String>
+    <sys:String x:Key="Setup.Launch.Memory.Max">最大記憶體（-Xmx）</sys:String>
+    <sys:String x:Key="Setup.Launch.Memory.Max.ToolTip">遊戲可使用的最大堆積記憶體大小</sys:String>
+    <sys:String x:Key="Setup.Launch.Memory.Initial">初始記憶體（-Xms）</sys:String>
+    <sys:String x:Key="Setup.Launch.Memory.Initial.ToolTip">遊戲啟動時預先分配的堆積記憶體大小，可以低於最大堆（-Xmx）。設為 0 表示不主動設定，由 JVM 自行決定。僅在手動配置記憶體分配時生效，啟用「鎖定記憶體分配」時不生效。</sys:String>
+    <sys:String x:Key="Setup.Launch.Memory.InitialSuffix">初始 {0} GiB</sys:String>
     <sys:String x:Key="Setup.Launch.Memory.Title">遊戲記憶體</sys:String>
     <sys:String x:Key="Setup.Launch.Memory.UsedTotal">已使用記憶體 / 已安裝記憶體</sys:String>
     <sys:String x:Key="Setup.Launch.Memory.Warning.Java32Bit">32 位元 Java 只能分配最多 1 GiB 的記憶體。強烈建議換用 64 位元的 Java！</sys:String>

Plain Craft Launcher 2/Modules/Minecraft/ModLaunch.cs

@@ -2135,10 +2135,22 @@ internal static void SecretLaunchJvmArgs(ref List<string> dataList)
         var maxHeapArg = Math.Floor(totalRamMb).ToString(CultureInfo.InvariantCulture);
         dataList.Add("-Xmn" + Math.Floor(totalRamMb * 0.15).ToString(CultureInfo.InvariantCulture) + "m");
         dataList.Add("-Xmx" + maxHeapArg + "m");
-        // #3282: 固定堆大小时追加 -Xms 使其等于 -Xmx（复用同一数值以保持一致），隐式禁用内存归还降低延迟抖动、利于 ZGC。
         // 若 dataList 中已存在 -Xms（例如用户自定义参数已设）则跳过，避免重复/冲突。
-        if (Config.Launch.LockMemory && !dataList.Any(d => d.Contains("-Xms", StringComparison.OrdinalIgnoreCase)))
-            dataList.Add("-Xms" + maxHeapArg + "m");
+        if (!dataList.Any(d => d.Contains("-Xms", StringComparison.OrdinalIgnoreCase)))
+        {
+            if (Config.Launch.LockMemory)
+            {
+                // #3282: 固定堆大小时追加 -Xms 使其等于 -Xmx（复用同一数值以保持一致），隐式禁用内存归还降低延迟抖动、利于 ZGC。
+                dataList.Add("-Xms" + maxHeapArg + "m");
+            }
+            else
+            {
+                // #3511: 支持自定义初始堆大小（-Xms），可低于最大堆。
+                var initialRam = PageInstanceSetup.GetInitialRam(ModInstanceList.McMcInstanceSelected);
+                if (initialRam.HasValue)
+                    dataList.Add("-Xms" + Math.Floor(initialRam.Value * 1024d).ToString(CultureInfo.InvariantCulture) + "m");
+            }
+        }
         if (!dataList.Any(d => d.Contains("-Dlog4j2.formatMsgNoLookups=true")))
             dataList.Add("-Dlog4j2.formatMsgNoLookups=true");
     }
@@ -2467,10 +2479,23 @@ private static string McLaunchArgumentsJvmOld(McInstance instance)
         var maxHeapArg = Math.Floor(PageInstanceSetup.GetRam(ModInstanceList.McMcInstanceSelected,
             !mcLaunchJavaSelected.Installation.Is64Bit) * 1024d);
         dataList.Add("-Xmx" + maxHeapArg + "m");
-        // #3282: 固定堆大小时追加 -Xms 使其等于 -Xmx（复用同一数值以保持一致），隐式禁用内存归还降低延迟抖动、利于 ZGC。
         // 若 dataList 中已存在 -Xms（例如用户自定义参数已设）则跳过，避免重复/冲突。
-        if (Config.Launch.LockMemory && !dataList.Any(d => d.Contains("-Xms", StringComparison.OrdinalIgnoreCase)))
-            dataList.Add("-Xms" + maxHeapArg + "m");
+        if (!dataList.Any(d => d.Contains("-Xms", StringComparison.OrdinalIgnoreCase)))
+        {
+            if (Config.Launch.LockMemory)
+            {
+                // #3282: 固定堆大小时追加 -Xms 使其等于 -Xmx（复用同一数值以保持一致），隐式禁用内存归还降低延迟抖动、利于 ZGC。
+                dataList.Add("-Xms" + maxHeapArg + "m");
+            }
+            else
+            {
+                // #3511: 支持自定义初始堆大小（-Xms），可低于最大堆。
+                var initialRam = PageInstanceSetup.GetInitialRam(ModInstanceList.McMcInstanceSelected,
+                    !mcLaunchJavaSelected.Installation.Is64Bit);
+                if (initialRam.HasValue)
+                    dataList.Add("-Xms" + Math.Floor(initialRam.Value * 1024d).ToString(CultureInfo.InvariantCulture) + "m");
+            }
+        }
         dataList.Add("\"-Djava.library.path=" + GetNativesFolder() + "\"");
         dataList.Add("-cp ${classpath}"); // 把支持库添加进启动参数表
 

Plain Craft Launcher 2/Pages/PageInstance/PageInstanceSetup.xaml

@@ -106,7 +106,8 @@
                         <Grid.RowDefinitions>
                             <RowDefinition Height="Auto" />
                             <RowDefinition Height="Auto" />
-                            <RowDefinition Height="9" />
+                            <RowDefinition Height="Auto" />
+                            <RowDefinition Height="Auto" />
                             <RowDefinition Height="Auto" />
                         </Grid.RowDefinitions>
 
@@ -124,19 +125,26 @@
                             Width="110"
                             x:Name="RadioRamType0"
                             Tag="VersionRamType/0"
-                            Margin="0,0,20,0"
+                            Margin="0,0,20,9"
                             ToolTip="{DynamicResource Setup.Launch.Memory.Auto.ToolTip}"
                             ToolTipService.Placement="Right"
                             ToolTipService.HorizontalOffset="-10"
                             ToolTipService.VerticalOffset="-3" />
 
                         <local:MyRadioBox
-                            Grid.Row="3" Grid.Column="0"
+                            Grid.Row="2" Grid.Column="0"
                             Text="{DynamicResource Common.Option.Customize}"
                             Width="110"
                             x:Name="RadioRamType1"
                             Tag="VersionRamType/1"
-                            Margin="0,0,20,0" />
+                            Margin="0,0,20,9" />
+
+                        <TextBlock
+                            Grid.Row="3" Grid.Column="0"
+                            Text="{DynamicResource Setup.Launch.Memory.Max}"
+                            VerticalAlignment="Center"
+                            Margin="0,0,20,9"
+                            ToolTip="{DynamicResource Setup.Launch.Memory.Max.ToolTip}" />
 
                         <local:MySlider
                             Grid.Row="3" Grid.Column="1"
@@ -145,7 +153,24 @@
                             Tag="VersionRamCustom"
                             MaxValue="49"
                             Value="13"
-                            Margin="0,0,12,0" />
+                            Margin="0,0,12,9" />
+
+                        <TextBlock
+                            Grid.Row="4" Grid.Column="0"
+                            Text="{DynamicResource Setup.Launch.Memory.Initial}"
+                            VerticalAlignment="Center"
+                            Margin="0,0,20,0"
+                            ToolTip="{DynamicResource Setup.Launch.Memory.Initial.ToolTip}" />
+
+                        <local:MySlider
+                            Grid.Row="4" Grid.Column="1"
+                            IsEnabled="False"
+                            x:Name="SliderRamInitialCustom"
+                            Tag="VersionRamCustomInitial"
+                            MaxValue="49"
+                            Value="0"
+                            Margin="0,0,12,0"
+                            ToolTip="{DynamicResource Setup.Launch.Memory.Initial.ToolTip}" />
                     </Grid>
                     <Grid x:Name="PanRamDisplay" Margin="0,11,2,0" SnapsToDevicePixels="True">
                         <Grid.ColumnDefinitions>

Plain Craft Launcher 2/Pages/PageInstance/PageInstanceSetup.xaml.cs

@@ -34,6 +34,7 @@ public PageInstanceSetup()
         RadioRamType0.Check += RadioBoxChange;
         RadioRamType1.Check += RadioBoxChange;
         SliderRamCustom.Change += SliderChange;
+        SliderRamInitialCustom.Change += SliderChange;
 
         ComboServerLoginRequire.SelectionChanged += ComboServerLogin_Changed;
         TextServerAuthServer.TextChanged += TextBoxChange;
@@ -107,6 +108,7 @@ public void Reload()
             var ramType = Config.Instance.MemorySolution[PageInstanceLeft.McInstance.PathInstance];
             ((MyRadioBox)FindName("RadioRamType" + ramType)).Checked = true;
             SliderRamCustom.Value = Config.Instance.CustomMemorySize[PageInstanceLeft.McInstance.PathInstance];
+            SliderRamInitialCustom.Value = Config.Instance.CustomInitialMemorySize[PageInstanceLeft.McInstance.PathInstance];
             RamType(ramType);
 
             // 服务器
@@ -248,6 +250,8 @@ public void RamType(int type)
         if (SliderRamCustom is null)
             return;
         SliderRamCustom.IsEnabled = type == 1;
+        // 锁定内存为全局配置，启用时 -Xms 恒等于 -Xmx，初始内存设置不生效
+        SliderRamInitialCustom.IsEnabled = type == 1 && !Config.Launch.LockMemory;
     }
 
     /// <summary>
@@ -277,7 +281,12 @@ public void RefreshRam(bool showAnim)
         else
             SliderRamCustom.MaxValue = (int)Math.Round(Math.Floor((ramTotal - 16d) / 2d) + 33d);
         // 设置文本
-        LabRamGame.Text = $"{Lang.Number(ramGame, "N1")} GiB{(ramGame != ramGameActual ? $" ({Lang.Text("Setup.Launch.Memory.AvailableSuffix", Lang.Number(ramGameActual, "N1"))})" : "")}";
+        var ramInitial = GetInitialRam(PageInstanceLeft.McInstance);
+        var initialText = ramInitial.HasValue ? Lang.Text("Setup.Launch.Memory.InitialSuffix", Lang.Number(ramInitial.Value, "N1")) : "";
+        var availableText = ramGame != ramGameActual ? Lang.Text("Setup.Launch.Memory.AvailableSuffix", Lang.Number(ramGameActual, "N1")) : "";
+        var suffixText = !string.IsNullOrEmpty(initialText) && !string.IsNullOrEmpty(availableText) ? initialText + ", " : initialText;
+        suffixText += availableText;
+        LabRamGame.Text = $"{Lang.Number(ramGame, "N1")} GiB{(suffixText.Length > 0 ? $" ({suffixText})" : "")}";
         LabRamUsed.Text = $"{Lang.Number(ramUsed, "N1")} GiB";
         LabRamTotal.Text = $" / {Lang.Number(ramTotal, "N1")} GiB";
         LabRamWarn.Visibility =
@@ -524,14 +533,7 @@ public static double GetRam(McInstance version, bool? is32BitJava = default)
         {
             // 手动配置
             var value = Config.Instance.CustomMemorySize[instancePath];
-            if (value <= 12)
-                ramGive = value * 0.1d + 0.3d;
-            else if (value <= 25)
-                ramGive = (value - 12) * 0.5d + 1.5d;
-            else if (value <= 33)
-                ramGive = (value - 25) * 1 + 8;
-            else
-                ramGive = (value - 33) * 2 + 16;
+            ramGive = PageSetupLaunch.GetRamFromTick(value);
         }
 
         // 若使用 32 位 Java，则限制为 1G
@@ -540,6 +542,32 @@ public static double GetRam(McInstance version, bool? is32BitJava = default)
         return ramGive;
     }
 
+    /// <summary>
+    ///     获取当前设置的初始堆大小（-Xms）。单位为 GB；未启用自定义初始大小时返回 null。
+    /// </summary>
+    public static double? GetInitialRam(McInstance version, bool? is32BitJava = default)
+    {
+        // 锁定内存为全局配置，启用时 -Xms 恒等于 -Xmx，由锁定内存逻辑处理
+        if (Config.Launch.LockMemory)
+            return null;
+        // 自定义 JVM 参数含 -Xms 时由其决定实际初始堆，不再显示滑块值
+        if (PageSetupLaunch.HasCustomXms(version))
+            return null;
+        var instancePath = version?.PathInstance;
+        switch (Config.Instance.MemorySolution[instancePath])
+        {
+            case 2:
+                return PageSetupLaunch.GetInitialRam(version, true, is32BitJava);
+            case 1:
+                var initialTick = Config.Instance.CustomInitialMemorySize[instancePath];
+                if (initialTick <= 0)
+                    return null;
+                return Math.Min(PageSetupLaunch.GetRamFromTick(initialTick), GetRam(version, is32BitJava));
+            default:
+                return null;
+        }
+    }
+
     #endregion
 
     #region 服务器