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https://stackoverflow.com/questions/3330430/does-java-have-support-for-multicore-processors-parallel-processing
Yes. It also has been a platform for other programming languages where the implementation added a "true multithreading" or "real threading" selling point. The G1 Garbage Collector introduced in newer releases also makes use of multi-core hardware. Java Concurrency in …
https://community.oracle.com/thread/1542491
Nov 28, 2008 · Hi, Sun's JVM runs very well on multi-thread/core/chip systems and provides several mechanisms to scale well in such environments (for example Thread Local Allocation Buffers (TLABs), parallel gargabe collection threads etc.). Java threads are 1:1 mapped to operating system threads.
https://www.ibm.com/support/knowledgecenter/en/SSEP7J_10.2.1/com.ibm.swg.ba.cognos.ig_rtm.10.2.1.doc/t_jvm_cnfg.html
This section describes how to modify the Java™ virtual machine (JVM) settings by editing the start scripts. It assumes that you are using a Java SE HotSpot JVM version 1.5. ... If there are 4 dual-core processors, or 2 quad-core processors, enter:-XX:ParallelGCThreads=8.
http://www.cs.hut.fi/u/tlilja/multicore/slides/java_multicore.pdf
Concurrency support introduced in version 5 was clearly targeted to parallel execution enabled by multi-core CPUs by allowing better performance and more detailed synchronization control. This chapter introduces the contents of the tree added concurrency support packages
https://stackoverflow.com/questions/38298668/does-java-code-automatically-utilize-multiple-processor-cores-if-available
It's possible in java to take advantage of multi-core utilization, by creating separate threads. Unlike earlier implementations of JVM, modern implementations create native threads, which OS can recognize and thus, each available processor can be allocated to each thread created in running java program.
https://stackoverflow.com/questions/3236886/jvm-on-multicore
See NUMA for reasons why multi-core might hinder. We have seen performance deltas in the 30% range or more depending on how JVMs are pinned to processors. SPECjbb2005 is now mostly run in "multi-JVM" mode with each JVM associated with a given CPU / …
https://www.theregister.co.uk/2014/03/20/java_8_security_multi_core/
Mar 20, 2014 · Two years later than planned, Oracle has made Java ready for a multi-core processor world. The database giant has announced general availability of Java 8, calling it a “major new release ...
https://www.quora.com/Does-JVM-use-multiple-cores
Most JVMs, including OpenJDK and Oracle's Java runtime (JDK / JRE), use OS threads, which means that if there are multiple cores, they will almost certainly all be used by multi-threaded code running on the JVM. Furthermore, the JVM itself uses multiple threads for things like Garbage Collection. For the sake of full disclosure, I work at Oracle.
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