G1
http://hg.openjdk.java.net/jdk9/jdk9/hotspot/file/b756e7a2ec33/src/share/vm/gc/g1/
write barrier or store check
http://www.cs.ucsb.edu/~urs/oocsb/papers/write-barrier.pdf
Older-first Garbage Collection in Practice:Evaluation in a Java Virtual Machine
http://www.cs.utexas.edu/users/speedway/DaCapo/papers/of-msp-2002.pdf
原文：http://www.cnblogs.com/WCFGROUP/p/7501188.html