Date: Sat, 1 May 2010 11:25:24 +0200 From: Gary Jennejohn <gljennjohn@googlemail.com> To: Maxim Sobolev <sobomax@FreeBSD.org> Cc: freebsd-net@FreeBSD.org, "current@freebsd.org" <current@FreeBSD.org> Subject: Re: Making IFQ_MAXLEN tunable Message-ID: <20100501112524.26c2fe5c@ernst.jennejohn.org> In-Reply-To: <4BDBF028.5040505@FreeBSD.org> References: <4BDB3C31.4050709@sippysoft.com> <20100501105823.28ac1756@ernst.jennejohn.org> <4BDBF028.5040505@FreeBSD.org>
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On Sat, 01 May 2010 02:11:04 -0700 Maxim Sobolev <sobomax@FreeBSD.org> wrote: > Gary Jennejohn wrote: > > On Fri, 30 Apr 2010 13:23:13 -0700 > > Maxim Sobolev <sobomax@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
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