[post] Collect metrics using proc filesystem

[at15]

Type

• request post from @at15

Related

• https://github.com/xephonhq/xephon-k/issues/39
• https://github.com/benchhub/benchboard/projects/3

Description

Since I am building agent for https://github.com/benchhub/benchboard

• common files under /proc
• write agent in go by parsing files
• survey of popular go libraries, go-ps etc.

Update