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Cc: freebsd-net@freebsd.org, Eugene Grosbein <eugen@kuzbass.ru>,
	Luigi Rizzo <rizzo@iet.unipi.it>, Julian Elischer <julian@elischer.org>
Subject: Re: dummynet dropping too many packets
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Robert Watson wrote:
> I would suggest making just the HZ -> 4000 change for now and see how
> it goes.
> 
~4000 online users, ~450-470 mbps traffic, 300-600 global drops per 
second. Same ole. Not funny at all.

net.inet.ip.dummynet.io_pkt_drop: 0
net.inet.ip.intr_queue_drops: 0
net.inet.ip.fastforwarding: 1



> Robert Watson wrote:
> Suggestions like increasing timer resolution are intended to spread
> out the injection of packets by dummynet to attempt to reduce the
> peaks of burstiness that occur when multiple queues inject packets in
> a burst that exceeds the queue depth supported by combined hardware
> descriptor rings and software transmit queue.

My last chance is to tweak the software transmit queue. Just how can I 
alter its size?

P.S.: We're definitely going to buy a 10GigE card. Like this one:
http://cgi.ebay.com/EXPX9502CX4-10-CX4-DualPort-Svr-Adap-Intel-Corp_W0QQitemZ150358746205QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item230214645d