堆中的并发标记扫描生成是什么？

Question

在以下输出中,什么是并发标记扫描生成？

par new generation   total 24512K, used 12082K [0x00007fb3b9420000, 0x00007fb3bac20000, 0x00007fb3bac20000)
 eden space 24448K,  49% used [0x00007fb3b9420000, 0x00007fb3b9fec808, 0x00007fb3bac00000)
 from space 64K,   0% used [0x00007fb3bac10000, 0x00007fb3bac10000, 0x00007fb3bac20000)
 to   space 64K,   0% used [0x00007fb3bac00000, 0x00007fb3bac00000, 0x00007fb3bac10000)
concurrent mark-sweep generation total 8364032K, used 233100K [0x00007fb3bac20000, 0x00007fb5b9420000, 0x00007fb5b9420000)
concurrent-mark-sweep perm gen total 98304K, used 72031K [0x00007fb5b9420000, 0x00007fb5bf420000, 0x00007fb5bf420000)

我理解eden,from,to和perm gen,但什么是"并发标记扫描生成"？

Answer 1

"concurent mark-sweep generation"是老一代.