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Date:      Fri, 23 Feb 2024 09:39:29 +0000
From:      bugzilla-noreply@freebsd.org
To:        fs@FreeBSD.org
Subject:   [Bug 277197] NFS is much too slow at 10GbaseT
Message-ID:  <bug-277197-3630-YqtS4ZwSNO@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-277197-3630@https.bugs.freebsd.org/bugzilla/>
References:  <bug-277197-3630@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D277197

--- Comment #3 from Hannes Hauswedell <h2+fbsdports@fsfe.org> ---
I can confirm that rsize and wsize do not influence the performance of the
Linux NFS3 client strongly; choosing values between 128KiB and 1MiB, I alwa=
ys
get  550-600MiB/s.

The Linux client is however strongly influenced by device mtu. I am current=
ly
operating both server and client at an mtu of 9000. If I lower the mtu to 1=
500,
the Linux client performs *very similar* to the FreeBSD client (at any mtu),
delivering 200-250 MiB/s.

I think, it is strange that the FreeBSD NFS client does not benefit from a =
mtu
higher than 1500. Could this be a hint at what's going wrong?

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