[TOC]
该项目采用rust语言实现了fincore工具和vmtouch工具。
fincore工具采用mincore获取文件加载到cache中的pages。fincore只能对单文件以及*文件进行统计，不能递归统计目录。相比之下vmtouch更加强大，可以统计目录中文件加载到内存中的pages，也可以对内存中page进行锁住(lock)、回收(evict)等。
cd fincore
cargo build $ cargo run --package fincore -- --help
a mem tool named fincore
Usage: fincore [OPTIONS] <PATHES>...
Arguments:
<PATHES>... Path to the file
Options:
-p, --pages Print page index
-s, --summarize When comparing multiple files, print a summary report
-o, --only-cached Only print cached pages
-h, --help Print help
-V, --version Print version$ cargo run --package fincore -- * -p
path: ../Cargo.lock, cached_pages: 0
path: ../Cargo.toml, cached_pages: 0
path: ../README.md, cached_pages: 0
+---------------+-----------+-------------+--------+-------------+-------------------+
| path | file_size | total_pages | cached | cached_size | cached_percent |
+---------------+-----------+-------------+--------+-------------+-------------------+
| ../Cargo.lock | 9609 | 3 | 1 | 4096 | 33.33333333333333 |
+---------------+-----------+-------------+--------+-------------+-------------------+
| ../Cargo.toml | 45 | 1 | 1 | 4096 | 100 |
+---------------+-----------+-------------+--------+-------------+-------------------+
| ../README.md | 603 | 1 | 1 | 4096 | 100 |
+---------------+-----------+-------------+--------+-------------+-------------------+
total cached size: 12288 byte其灵感来自fincore。
$ cargo run --package vmtouch -- -l
Locking ./a
Resident Pages: 1 1 4096 4096 100.000其灵感来自vmtouch。