$FreeBSD: head/usr.bin/top/top.local.1 172039 2007-09-02 10:29:16Z ru $
The '-H' option will toggle the display of kernel visible thread contexts. At runtime the 'H' key will toggle this mode. The default is OFF. Mem: 9220K Active, 1032K Inact, 3284K Wired, 1MB Cache, 2M Buf, 1320K Free Swap: 91M Total, 79M Free, 13% Inuse, 80K In, 104 K Out K: Kilobyte

M: Megabyte

%: 1/100

Active: number of pages active

Inact: number of pages inactive

Wired: number of pages wired down, including cached file data pages

Cache: number of clean pages caching data that are available for immediate reallocation

Buf: number of pages used for BIO-level disk caching

Free: number of pages free

Total: total available swap usage

Free: total free swap usage

Inuse: swap usage

In: pages paged in from swap devices (last interval)

Out: pages paged out to swap devices (last interval)