I have read some where that ruby fork are COW friendly ok here the link
但当我碰巧四处寻找更多关于它的信息时,我发现Ruby不支持“强型”COW
现在我实际上有点困惑了 红宝石是否实际支持了 < 强 > COW 功能
I m also aware that REE and Rubinius has a COW friendly GC so does that me REE and Rubinius support COW functionality
如果红宝石支持 < 强 > COW < /强 > 功能, 那么如何在Ruby 测试“ 强” 概念的标本 < /强 > 代码
谢谢 谢谢
fork being copy-on-write 是操作系统内核的属性, 不是 Ruby。 在大多数类似 UNIX 的系统中, 是 。
例如,在 Linux 上, 您可以查看 < code>/ proc/ pid/ smaps , 并查看共享多少堆积映射。 下面是使用叉子的 < code> bash 的示例 :
02020000-023cd000 rw-p 00000000 00:00 0 [heap]
Size: 3764 kB
Rss: 3716 kB
Pss: 1282 kB
Shared_Clean: 0 kB
Shared_Dirty: 3652 kB
Private_Clean: 0 kB
Private_Dirty: 64 kB
Referenced: 144 kB
Anonymous: 3716 kB
AnonHugePages: 0 kB
Swap: 0 kB
KernelPageSize: 4 kB
MMUPageSize: 4 kB
Locked: 0 kB
因此,在3764公里的堆积堆中,共有3652kk。关于/proc 中文件的文件,见proc.txt 。
当然,Ruby可能有些东西 导致COW页面被复制(例如,也许它的垃圾收集器 写在每页上), 但你可以看到,通过共享的数数到0, 可以看到这一点。
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