创办人 旗帜:
java -XX:+UnlockDiagnosticVMOptions -XX:+PrintFlagsFinal -version
It prints hundreds of various options, I never heard about before. It also prints default values, that helps diagnose JVM behaviors better. Another interesting flag is:
-XX:+UnlockExperimentalVMOptions
Does anyone knows of any documentation which explains each one of them ?
Do not miss also -XX:+JVERCIPrintProperties for Graal JIT options.
在进入源头之前,你可以ski过以下提取物,并更快地找到合适的选择:
https://chriswhocodes.com/ (OracleJDK) 6/7/8/9/10/11/12, OpenJDK 8/9/10/11, Graal CE/EE, OpenJ9, Zing
The Best documentation I ve found is the source。
I ve used this Q&A用于建造一座浴室。 有了这一节奏,你可以操作<条码>java-XX:+AggressiveOpts -XX:+ Unlock DiagnosticVMOptions - XX:+ - XX:+PrintFlagsFinal -XX:+PrintFlags WithComments -version。
从来源目录上看,你可以执行(假设你正在使用CFC、Cygwin等):
grep -FR UnlockExperimentalVMOptions hotspot/
或者,以下(仅看*.cpp和*.hpp文档):
find hotspot/ -name *.[ch]pp -exec grep -F UnlockExperimentalVMOptions {} +
然后看来文方的档案。 或许是没有一份文件来描述所有选择的最好理由,就是其中一些选择最好留给那些真正理解联合核查机制的人,而这样做的最佳方式是熟悉源代码。
因此,在(几乎)伟大的master ,use the source!
以下指挥机构也有助于检索所有选择清单。
java - XX:+PrintFlagsFinal -version
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