Re: mbuf cluster leak?

[email protected] (Paul Ripke) writes:

>ksh$ netstat -ms                         
>2366 mbufs in use:
>        1646 mbufs allocated to data
>        685 mbufs allocated to packet headers
>        35 mbufs allocated to socket names and addresses
>18 calls to protocol drain routines


Try 'netstat -mss' to get the mbuftrace information. E.g:

% netstat -mss
322 mbufs in use:
        321 mbufs allocated to data
        1 mbufs allocated to packet headers
4 calls to protocol drain routines
                                             small        ext    cluster
             tcp               inuse             1          0          0
             tcp sock tx       inuse             1          0          0
             tcp rx            inuse             1          1          0
            iwn0 rx            inuse            64         64          0
            iwn0 tx            inuse             1          0          0
             wm0 rx            inuse           256        256        256


The table differentiates between:

small:    an mbuf header (includes a small buffer).
ext:      an mbuf header with any external buffer.
cluster:  an mbuf header with a standard external buffer ("cluster").

so "small" is what is in the summary. The numbers may not add up exactly
because retrieving them isn't "atomic".