Hi everyone,
I am coming here from
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=2771971160
TL;DR:
* I have a FreeBSD14 Server and Client with an Intel X540 (ix) adaptor
each.
* I am trying to improve the NFS throughput.
* I get 1160 MiB/s via nc, but only ~200 MiB/s via NFS.
* Increasing rsize and wsize to 1 MiB increases throughput to 395 MiB/s
* But a Linux client achieves 560-600 MiB/s with any rsize.
* The mtu is set to 9000 but this doesn't make a difference for the
FreeBSD client (it does make a difference for Linux).
I assume < 400 MiB/s is not the expected performance? Do you have any
advice on debugging this?
Thank you for your help,
Hannes
Hi Hannes,
thank you for the reply!
The link didn’t work .
Sorry, no clue how that copy-pasta happened. The link Michael posted is
correct:
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=277197
Can you tell us more about the file system ,
what type of disks .
4x4TiB NVME (Lexar NM790) raidz1
The server can maintain speeds over 900 MiB/s copying hundreds of
Gigabytes from one dataset to another including compression and
encryption on both ends, so I don't think the server setup is a problem.
nc manages to send data at 1100 MiB/s from the server to the client.
Details about the server , hardware details. If
you want post a copy of your dmesg to
https://dmesgd.nycbug.org/index.cgi
<https://dmesgdnycbug.org/index.cgi> that can help too .
https://dmesgd.nycbug.org/index.cgi?do=view&id=7527
If there is anything else that would help, please let me know!
Also what kinds of clients are you using ?
The FreeBSD14 client is an amd64 machine with the same network adaptor
as the server (Intel X540 T1).
I have set up a dual-boot with Devuan GNU/Linux. As reported above,
Linux achieves 600 MiB/s out of the box.
Do you have any relevant network stats or a topology/ diagram of the
shape of things ?
The client and server are connected via CAT7 cables and a NETGEAR
switch. I could look up the model later, but it can probably be ruled
out if other tools/OS achieve higher throughput?
Best regards,
Hannes
--
Dr. Hannes Hauswedell
C++ Software Engineer
https://hannes.hauswedell.net
