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Date:      Sun, 20 Jan 2019 08:22:31 +0000
From:      bugzilla-noreply@freebsd.org
To:        net@FreeBSD.org
Subject:   [Bug 235031] [em] em0: poor NFS performance, strange behavior
Message-ID:  <bug-235031-7501-2oo4shWgVt@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-235031-7501@https.bugs.freebsd.org/bugzilla/>
References:  <bug-235031-7501@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D235031

--- Comment #16 from Martin Birgmeier <d8zNeCFG@aon.at> ---
In the tcpdump log shown in comment #4 it seems that there is always a lot =
of
traffic in one direction followed by a lot of ACKs in the other (if I inter=
pret
it correctly).

Could it be that something is buffering too many packets, thereby destroying
NFS "streaming"?

What about this strange "em0: TX(0) desc avail =3D 1024, pidx =3D 0" error =
in
comment #2 when I tried to set -rxcsum? Does it mean that there are 1024
buffers available?

-- Martin

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