Date: Sat, 01 May 2010 02:11:04 -0700 From: Maxim Sobolev <sobomax@FreeBSD.org> To: gljennjohn@googlemail.com Cc: freebsd-net@FreeBSD.org, "current@freebsd.org" <current@FreeBSD.org> Subject: Re: Making IFQ_MAXLEN tunable Message-ID: <4BDBF028.5040505@FreeBSD.org> In-Reply-To: <20100501105823.28ac1756@ernst.jennejohn.org> References: <4BDB3C31.4050709@sippysoft.com> <20100501105823.28ac1756@ernst.jennejohn.org>
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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 -Maxim
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