Date: Sat, 1 May 2010 10:58:23 +0200 From: Gary Jennejohn <gljennjohn@googlemail.com> To: Maxim Sobolev <sobomax@sippysoft.com> Cc: freebsd-net@FreeBSD.ORG, "current@freebsd.org" <current@FreeBSD.ORG> Subject: Re: Making IFQ_MAXLEN tunable Message-ID: <20100501105823.28ac1756@ernst.jennejohn.org> In-Reply-To: <4BDB3C31.4050709@sippysoft.com> References: <4BDB3C31.4050709@sippysoft.com>
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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. -- Gary Jennejohn
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