On Sat, May 26, 2001 at 09:34:42PM +0200, Jesper Skriver wrote:
> Hi,
>
> I'm currently looking at ways to tune a ftp server, and when
> tuning net.inet.tcp.sendspace/net.inet.tcp.recvspace and
> NMBCLUSTERS, I came to think that in a ftp server role, half the
> TCP sessions will be control sessions, which doesn't transfer much
> data, so there is no reason to reserve the same number of buffers
> for sendspace/recvspace for these, compared to the data sessions.
>
> I was thinking of adding 3 new sysctl's
>
> net.inet.tcp.override_sendspace
> net.inet.tcp.override_recvspace
> net.inet.tcp.override_ports
>
> The latter controls which (if any) src/dst ports, trigger the
> session to get the overridden send and recv-space applied.
>
> Does this make any sense ?
As Mike Silbersack has educated me, the sendspace and recvspace is
only the upper limit pr. session, and it's not static allocated,
so this i not a problem, and thus this patch doesn't give us
anything.
So the only thing remaining is the bug where the sendpipe/recvpipe
doesn't have any effect.
/Jesper
> For my own testing I'm using
> <http://people.FreeBSD.org/~jesper/tcp_override.diff>
> which do this with one exception, it only allow's one port to be
> listed as override, I was to lazy to go into a comma separeted list
> for my initial testing.
> And I need to add these 3 sysctl's to tcp(4).
>
> My testing show that it doesn't seem to have any effect, but that
> actually show a different problem, as the sendpipe/recvpipe
> doesn't seem to have any effect either.
>
> On a box running stock -current as of may 16th
>
> root@tam% route change default -sendpipe 1024
> change net default
> root@tam% route change default -recvpipe 1024
> change net default
> root@tam% route get default
> route to: default
> destination: default
> mask: default
> gateway: dhcp129.skriver.dk
> interface: xl0
> flags: <UP,GATEWAY,DONE,STATIC,PRCLONING>
> recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire
> 1024 1024 0 0 0 0 1500 0
>
> And then I get a file from the http server on this host, but
> netstat -a give me
>
> root@tam% netstat -a|head -3
> Active Internet connections (including servers)
> Proto Recv-Q Send-Q Local Address Foreign Address (state)
> tcp4 0 17520 dhcp138.skriver..http freesbee.wheel.d.1162 ESTABLISHED
>
> So the send queue is the default 16k, regardless of the fact that
> I've overridden the default via the route
>
> Ok, perhaps I have to change it at the cloned route.
>
> root@tam% route get 193.162.159.97
> route to: freesbee.wheel.dk
> destination: freesbee.wheel.dk
> gateway: dhcp129.skriver.dk
> interface: xl0
> flags: <UP,GATEWAY,HOST,DONE,WASCLONED,PROTO3>
> recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire
> 0 0 139462230 79 7 0 1500 3421
> root@tam% route change 193.162.159.97 -sendpipe 1024 -recvpipe 1024
> change host 193.162.159.97
> root@tam% route get 193.162.159.97
> route to: freesbee.wheel.dk
> destination: freesbee.wheel.dk
> gateway: dhcp129.skriver.dk
> interface: xl0
> flags: <UP,GATEWAY,HOST,DONE,WASCLONED,PROTO3>
> recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire
> 1024 1024 139462230 79 7 0 1500 3390
>
> But still I get
>
> jesper@tam% netstat -a | head -3
> Active Internet connections (including servers)
> Proto Recv-Q Send-Q Local Address Foreign Address (state)
> tcp4 0 16384 dhcp138.skriver..http freesbee.wheel.d.1177 ESTABLISHED
>
> Any ideas ?
>
> /Jesper
>
> --
> Jesper Skriver, jesper(at)skriver(dot)dk - CCIE #5456
> Work: Network manager @ AS3292 (Tele Danmark DataNetworks)
> Private: FreeBSD committer @ AS2109 (A much smaller network ;-)
>
> One Unix to rule them all, One Resolver to find them,
> One IP to bring them all and in the zone to bind them.
>
> To Unsubscribe: send mail to [EMAIL PROTECTED]
> with "unsubscribe freebsd-net" in the body of the message
>
/Jesper
--
Jesper Skriver, jesper(at)skriver(dot)dk - CCIE #5456
Work: Network manager @ AS3292 (Tele Danmark DataNetworks)
Private: FreeBSD committer @ AS2109 (A much smaller network ;-)
One Unix to rule them all, One Resolver to find them,
One IP to bring them all and in the zone to bind them.
To Unsubscribe: send mail to [EMAIL PROTECTED]
with "unsubscribe freebsd-net" in the body of the message
