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bb5bd507d7
Ergonomics now also takes available virtual memory into account when deciding for a heap size. The helper method to determine the maximum allocatable memory block now uses the appropriate OS specific calls to retrieve available virtual memory for the java process. In 32 bit environments this method now also searches for the maximum actually reservable amount of memory. Merge previously separate implementations for Linux/BSD/Solaris into a single method. Reviewed-by: jmasa, tamao
README:
This file should be located at the top of the OpenJDK Mercurial root
repository. A full OpenJDK repository set (forest) should also include
the following 6 nested repositories:
"jdk", "hotspot", "langtools", "corba", "jaxws" and "jaxp".
The root repository can be obtained with something like:
hg clone http://hg.openjdk.java.net/jdk8/jdk8 openjdk8
You can run the get_source.sh script located in the root repository to get
the other needed repositories:
cd openjdk8 && sh ./get_source.sh
People unfamiliar with Mercurial should read the first few chapters of
the Mercurial book: http://hgbook.red-bean.com/read/
See http://openjdk.java.net/ for more information about OpenJDK.
Simple Build Instructions:
0. Get the necessary system software/packages installed on your system, see
http://hg.openjdk.java.net/jdk8/jdk8/raw-file/tip/README-builds.html
1. If you don't have a jdk7u7 or newer jdk, download and install it from
http://java.sun.com/javase/downloads/index.jsp
Add the /bin directory of this installation to your PATH environment
variable.
2. Configure the build:
bash ./configure
3. Build the OpenJDK:
make all
The resulting JDK image should be found in build/*/images/j2sdk-image
where make is GNU make 3.81 or newer, /usr/bin/make on Linux usually
is 3.81 or newer. Note that on Solaris, GNU make is called "gmake".
Complete details are available in the file:
http://hg.openjdk.java.net/jdk8/jdk8/raw-file/tip/README-builds.html