ref: dc593372bfc4224c6cf91d2031d0ad0aeadaddfe
dir: /rc/bin/memory/
#!/bin/rc
awk '
function human(name, n) {
printf "%-15s", name
if(n >= 1000000000) printf "%.3g GB\n", n / 1073741824
else if(n >= 1000000) printf "%.3g MB\n", n / 1048576
else if(n >= 1000) printf "%.3g KB\n", n / 1024
else printf "%d B\n", n
}
$2 == "memory" { human("total", $1) }
$2 == "pagesize" { pagesize = $1 }
$2 == "kernel" && NF == 2 { human("total kernel", $1 * pagesize) }
$2 == "user" { split($1, a, "/"); human("total user", a[2] * pagesize); print ""; human("used user", a[1] * pagesize) }
$2 == "kernel" && $3 == "malloc" { split($1, a, "/"); human("used kernel", a[1]) }
$2 == "kernel" && $3 == "draw" { split($1, a, "/"); human("used draw", a[1]) }
' < /dev/swap