After G1 performs a global markingphase determining the liveness of objects throughout the heap, it will immediately know where in the heap there are regions that are mostly empty.
在G1对全局进行标记并决定堆上对象的活跃度后，它立刻就知道堆上的哪些区域几乎是空闲的。
2
The mark phase is responsible for tracing through all objects visible to the application and marking them as live to prevent them from having their storage reclaimed.
标记阶段负责跟踪应用程序可见的所有对象并将它们标记为活的，以免回收它们的存储。
3
This was based on the assumption that SMBHs form in a similar way to stellar-mass black holes, marking the final phase in the lifespan of massive stars that have exhausted all their fuel for fusion.