Date: Fri, 30 Apr 2010 13:23:13 -0700 From: Maxim Sobolev <sobomax@sippysoft.com> To: "current@freebsd.org" <current@FreeBSD.ORG>, freebsd-net@FreeBSD.ORG Subject: Making IFQ_MAXLEN tunable Message-ID: <4BDB3C31.4050709@sippysoft.com>
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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 -Maxim
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