Date: Fri, 13 Aug 2004 09:06:11 -0700 From: "Kevin Oberman" <oberman@es.net> To: Doug White <dwhite@gumbysoft.com> Cc: freebsd-stable@freebsd.org Subject: Re: 5.2.1 performance issue Message-ID: <20040813160611.74F845D04@ptavv.es.net> In-Reply-To: Your message of "Thu, 12 Aug 2004 19:19:09 PDT." <20040812191715.A86599@carver.gumbysoft.com>
next in thread | previous in thread | raw e-mail | index | archive | help
> Date: Thu, 12 Aug 2004 19:19:09 -0700 (PDT) > From: Doug White <dwhite@gumbysoft.com> > Sender: owner-freebsd-stable@freebsd.org > > On Wed, 11 Aug 2004 igor@ktts.kharkov.ua wrote: > > > I noticed that box started getting input errors on em0. > > In order to fix that I increased EM_MAX_TXD from 256 to 1024 and > > EM_MAX_RXD from 256 to 2048. > > After that Input errors disappeared but I continued getting intr_queue_drops > > counter increasing. > > You might double check your duplex settings, and if you're on a managed > switch, the stats there. It may not have autonegotaited properly after > the reboot. > > Also make sure you aren't running with WITNESS and INVARIANTS. Those are > big CPU pigs. WITNESS is certainly a big CPU hog, but I don't see why INVARIANTS would be all that significant. And both are disabled in 5.2.1 GENERIC. I'd bet on either a duplex mis-match or an auto-negotiation failure. Both are very common and the latter can be a pain to deal with. (Don't assume that you can just nail up one end.) -- R. Kevin Oberman, Network Engineer Energy Sciences Network (ESnet) Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab) E-mail: oberman@es.net Phone: +1 510 486-8634
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20040813160611.74F845D04>