On 1/16/06, Jesper Juhl <[email protected]> wrote:
> >
> Maybe if you described "your current problem" someone could suggest a
> solution...
>
Sure, I'd be glad to. If I add up all the entries from the procfiles
(in /proc/net) on my system
packet = 1
netlink = 6
raw = 0
raw6 = 0
tcp = 5
tcp6 = 3
udp = 9
udp6 = 1
unix = 29
I find there are a total of 54 sockets open on my system.
Now this seems to differ from the value in /proc/net/sockstat:
# cat sockstat
sockets: used 59
TCP: inuse 5 orphan 0 tw 0 alloc 8 mem 1
UDP: inuse 9
RAW: inuse 0
FRAG: inuse 0 memory 0
So we are off by 5. I added some code around the stat collection used
in sockstat to get more detailed info about those sockets and the
output is here. The values are family[protocol family][socket
family].
family[1][1] = 17 (UNIX/LOCAL,STREAM)
family[1][2] = 12 (UNIX/LOCAL,DGRAM)
family[2][1] = 5 (INET,STREAM)
family[2][2] = 9 (INET,DGRAM)
family[2][3] = 2 (INET,RAW)
family[10][1] = 3 (INET6,STREAM)
family[10][2] = 1 (INET6,DGRAM)
family[10][3] = 3 (INET6,RAW)
family[16][2] = 6 (NETLINK/ROUTE,DGRAM)
family[17][10] = 1 (PACKET,PACKET)
Total = 59
All of these numbers match up with what we saw above, except the
INET/RAW and INET6/RAW sockets. It seems they aren't being counted
correctly -- which accounts for the 5 missing sockets. The
decrementing of these values is in sock_release() and seems to get
done correctly other times RAW sockets are created, but not for the 5
sockets in question.
Since the total socket usage seems out of place in that file -- and
quite possibly wrong, it seemed like a nice idea to get rid of it
(prior to understanding the reasoning behind keeping it). Now it
seems the goal will be to fix the discrepancy between these files.
-andy
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