Re: Making IFQ_MAXLEN tunable

On Sat, 01 May 2010 02:11:04 -0700
Maxim Sobolev <sobomax_at_FreeBSD.org> wrote:

> Gary Jennejohn wrote:
> > On Fri, 30 Apr 2010 13:23:13 -0700
> > Maxim Sobolev <sobomax_at_sippysoft.com> wrote:
> > 
> >> Hi,
> >>
> >> Many network drivers in the FreeBSD kernel use the IFQ_MAXLEN value to 
> >> set length of the outgoing packets queue. The default value for that 
> >> parameter is only 50, which is pretty low especially for the cases when 
> >> the system handles lot of small packets and can cause ENOBUFS in 
> >> applications under the load. The following patch makes IFQ_MAXLEN a 
> >> tunable. I am also tempted to bump the default value for IFQ_MAXLEN 
> >> 10-fold, but would like to hear what do people think about it first.
> >>
> >> http://sobomax.sippysoft.com/IFQ_MAXLEN.diff
> >>
> > 
> > Seems like a good idea, although I don't see where ifqmaxlen is being
> > initialized.
> 
> sys/net/if.c
> 

Shame on me for not looking at the file itself!  I only looked at the
patch.

--
Gary Jennejohn