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List:       freebsd-net
Subject:    Re: RELENG_5 material? ip_output.c#rev.1.227
From:       Max Laier <max () love2party ! net>
Date:       2004-08-23 20:27:26
Message-ID: 200408232227.27474.max () love2party ! net
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On Monday 23 August 2004 21:36, Julian Elischer wrote:
> what's the result of this..?

Uhg ... I knew I was missing something.

This will re-enable the so called "early drop hack" that checks early in the 
output path whether or not there is room left in the interface queue. This 
reduces the workload and the network lock contention as it avoids unnecessary 
progressing of packets that can't be queued (and later sent out) anyway.

For ALTQ enabled queues the check is disabled. Before this change it was 
disabled for *all* queues once you put in "options ALTQ".

> Max Laier wrote:
> >Hi,
> >
> >I'd like to merge the following diff to RELENG_5 in order to gain
> > performance for the most common ALTQ setups (huge, unALTQed LAN-if and
> > small(er), ALTQed WAN-uplink). It is really straight forward, please look
> > at the diff and tell me what you think:
> >http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/netinet/ip_output.c.diff?r1=
> >1.226&r2=1.227&f=h
> >
> >Thanks in advance!

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