On Sat, 27 Jul 2002, Marc Haber wrote:
> On Fri, Jul 26, 2002 at 06:40:06PM +0200, Roland Kuhn wrote:
> > On Fri, 26 Jul 2002, Marc Haber wrote:
> > > it looks like reading from a socket opened with PF_PACKET, SOCK_DGRAM
> > > loses data if the system is non-trivially loaded.
> > >
> > What exactly is this non-trivial load?
>
> ISP-backbone type of load, roughly 5000 Packets a second, 8 Mbit
> sustained.
>
What I meant was the load of processes running on the server. If I've
understood your situation correctly everything was running fine until you
started some additional local processes?
> > If it sometimes consumes the whole
> > of its timeslice then your net-acct is not scheduled for at least 10ms
> > which makes up about 50 packets. I don't know how long the queue is,
> > though... (might be 64kB, 50*mtu=75kB)
>
> We have set {r|w}mem_{max|default} to 256 Kbyte, but your calculation
> makes sense.
>
> Can the program learn if the queue has overflowed, so that it is able
> to yell at its admins for a larger queue? How can I give net-acct a
> chance to empty the queue before it is deferred again?
>
Maybe only at realtime priority, but I've no clue of what I say here...
Unluckily I'm not a guru :-(
Ciao,
Roland
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