2L相关链接

1、下载jre21后，解压到游戏目录，要求最终目录结构如下

2、修改游戏目录下的ProjectZomboid64.bat文件，修改SET PZ_CLASSPATH=之后的值为
commons-compress-1.18.jar;istack-commons-runtime.jar;jassimp.jar;javacord-2.0.17-shaded.jar;javax.activation-api.jar;jaxb-api.jar;jaxb-runtime.jar;lwjgl.jar;lwjgl-natives-windows.jar;lwjgl-glfw.jar;lwjgl-glfw-natives-windows.jar;lwjgl-jemalloc.jar;lwjgl-jemalloc-natives-windows.jar;lwjgl-opengl.jar;lwjgl-opengl-natives-windows.jar;lwjgl_util.jar;sqlite-jdbc-3.27.2.1.jar;trove-3.0.3.jar;uncommons-maths-1.2.3.jar;./
".\java21\bin\java.exe" -Djava.awt.headless=true -Dzomboid.steam=1 -Dzomboid.znetlog=1 -XX:-CreateCoredumpOnCrash -XX:-OmitStackTraceInFastThrow -XX:+UseZGC -XX:+ZGenerational -Xmx8192m -Xlog:gc* -Djava.library.path=./win64/;./ -cp %PZ_CLASSPATH% zombie.gameStates.MainScreenState %1 %2
IF %ERRORLEVEL% NEQ 0 (
".\java21\bin\java.exe" -Djava.awt.headless=true -Dzomboid.steam=1 -Dzomboid.znetlog=1 -XX:-CreateCoredumpOnCrash -XX:-OmitStackTraceInFastThrow -XX:+UseZGC -XX:+ZGenerational -Xmx8192m -Xlog:gc* -Djava.library.path=./win64/;./ -cp %PZ_CLASSPATH% zombie.gameStates.MainScreenState %1 %2
)
PAUSE
内容如图

3、修改ProjectZomboid64.json文件内容如下
{
"mainClass": "zombie/gameStates/MainScreenState",
"classpath": [
".",
"commons-compress-1.18.jar",
"istack-commons-runtime.jar",
"jassimp.jar",
"javacord-2.0.17-shaded.jar",
"javax.activation-api.jar",
"jaxb-api.jar",
"jaxb-runtime.jar",
"lwjgl.jar",
"lwjgl-natives-windows.jar",
"lwjgl-glfw.jar",
"lwjgl-glfw-natives-windows.jar",
"lwjgl-jemalloc.jar",
"lwjgl-jemalloc-natives-windows.jar",
"lwjgl-opengl.jar",
"lwjgl-opengl-natives-windows.jar",
"lwjgl_util.jar",
"sqlite-jdbc-3.27.2.1.jar",
"trove-3.0.3.jar",
"uncommons-maths-1.2.3.jar"
],
"vmArgs": [
"-Djava.awt.headless=true",
"-Xmx8192m",
"-Dzomboid.steam=1",
"-Dzomboid.znetlog=1",
"-Djava.library.path=win64/;.",
"-XX:-CreateCoredumpOnCrash",
"-XX:-OmitStackTraceInFastThrow",
"-XX:+UseZGC"
],
"windows": {
"6.1": {
"vmArgs": [
"-XX:+UseZGC",
"-Xmx8192m"
]
},
"10.0.17134": {
"vmArgs": [
"-XX:+UseZGC",
"-Xmx8192m"
]
}
}
}

4、之后运行游戏请手动打开ProjectZomboid64.bat这个文件即可

5、那么如何确定启用了ZGC和ZGenerational?
打开ProjectZomboid64.bat之后我们会看到很多输出代码，ctrl+A然后ctrl+c去复制这些输出代码到记事本(注意，不要等满屏很久再复制，前面的会被刷没)，我们会看到类似这样的输出
[0.003s][info][gc,init] Initializing The Z Garbage Collector
[0.003s][info][gc,init] Version: 21.0.5+11-LTS (release)
[0.004s][info][gc,init] NUMA Support: Disabled
[0.004s][info][gc,init] CPUs: 32 total, 32 available
[0.004s][info][gc,init] Memory: 32543M
[0.004s][info][gc,init] Large Page Support: Disabled
[0.004s][info][gc,init] Address Space Type: Contiguous/Unrestricted/Complete
[0.004s][info][gc,init] Address Space Size: 131072M
[0.005s][info][gc,init] Min Capacity: 8M
[0.005s][info][gc,init] Initial Capacity: 510M
[0.005s][info][gc,init] Max Capacity: 8192M
[0.005s][info][gc,init] Soft Max Capacity: 8192M
[0.005s][info][gc,init] Medium Page Size: 32M
[0.005s][info][gc,init] Pre-touch: Disabled
[0.005s][info][gc,init] Uncommit: Enabled
[0.006s][info][gc,init] Uncommit Delay: 300s
[0.007s][info][gc,init] GC Workers for Old Generation: 8 (dynamic)
[0.008s][info][gc,init] GC Workers for Young Generation: 8 (dynamic)
[0.016s][info][gc,init] GC Workers Max: 8 (dynamic)
[0.016s][info][gc,init] Runtime Workers: 20
[0.016s][info][gc ] Using The Z Garbage Collector
其中Using The Z Garbage Collector代码已经启用ZGC
而以下输出代表成功启用ZGenerational
[0.007s][info][gc,init] GC Workers for Old Generation: 8 (dynamic)
[0.008s][info][gc,init] GC Workers for Young Generation: 8 (dynamic)

6、为什么要用ZGenerational?看以下延迟图就知道了，横坐标是负载(打比方是mod数量)，纵坐标是延迟(低延迟则代表更流畅)，三条横线中G1代表G1GC GenZGC代表启用ZGenerational的ZGC，我们看到普通ZGC在低负载的时候，延迟比G1低，但是负载高了反而不如G1GC，而启用ZGenerational的ZGC无论在任何条件下延迟都低于G1GC

ZGC requires Windows version 1803 or later
Win7 用户无福消受，看来就G1凑合凑合吧~

不知道linux可以用不，steamdeck玩是真的舒服

我之前换过，但是发现了一个奇怪的情况：修改json和bat后，通过exe启动游戏，实际上没用到分代ZGC，我在jconsole里看还是在用G1GC；但是如果走bat启动那就能看到分代情况了。

b42好像没用了

B42有类似方法吗