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禁用特定程序的 RAM 内存缓存

tag-icon • tag-icon ram cache
禁用特定程序的 RAM 内存缓存

我正在使用由 C 语言编写的二进制文件运行一些基准测试。有什么方法可以让内核不要缓存这些二进制程序的任何部分吗？

答案1

查看有关“drop_caches”的内核文档。

https://www.kernel.org/doc/Documentation/sysctl/vm.txt

以下是一小部分：-

Writing to this will cause the kernel to drop clean caches, as well as
reclaimable slab objects like dentries and inodes.  Once dropped, their
memory becomes free.

To free pagecache:
    echo 1 > /proc/sys/vm/drop_caches
To free reclaimable slab objects (includes dentries and inodes):
    echo 2 > /proc/sys/vm/drop_caches
To free slab objects and pagecache:
    echo 3 > /proc/sys/vm/drop_caches

This is a non-destructive operation and will not free any dirty objects.
To increase the number of objects freed by this operation, the user may run
`sync' prior to writing to /proc/sys/vm/drop_caches.  This will minimize the
number of dirty objects on the system and create more candidates to be
dropped.

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