linux-nfs.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Alkis Georgopoulos <alkisg@gmail.com>
To: linux-nfs@vger.kernel.org
Subject: rsize,wsize=1M causes severe lags in 10/100 Mbps, what sets those defaults?
Date: Thu, 19 Sep 2019 10:29:40 +0300	[thread overview]
Message-ID: <80353d78-e3d9-0ee2-64a4-cd2f22272fbe@gmail.com> (raw)

Hi, in any recent distribution that I tried, the default NFS wsize/rsize 
was 1 MB.

On 10/100 Mbps networks, this causes severe lags, timeouts, and dmesg 
fills with messages like:

 > [  316.404250] nfs: server 192.168.1.112 not responding, still trying
 > [  316.759512] nfs: server 192.168.1.112 OK

Forcing wsize/rsize to 32K makes all the problems disappear and NFS 
access more snappy, without sacrificing any speed at least up to gigabit 
networks that I tested with.

I would like to request that the defaults be changed to 32K.
But I didn't find out where these defaults come from, where to file the 
issue and my test case / benchmarks to support it.

I've initially reported it at the klibc nfsmount program that I was 
using, but this is just using the NFS defaults, which are the ones that 
should be amended. So initial test case / benchmarks there:
https://lists.zytor.com/archives/klibc/2019-September/004234.html

Please Cc me as I'm not in the list.

Thank you,
Alkis Georgopoulos

             reply	other threads:[~2019-09-19  7:29 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-19  7:29 Alkis Georgopoulos [this message]
2019-09-19 15:08 ` rsize,wsize=1M causes severe lags in 10/100 Mbps, what sets those defaults? Trond Myklebust
2019-09-19 15:58   ` rsize,wsize=1M causes severe lags in 10/100 Mbps Alkis Georgopoulos
2019-09-19 16:11     ` Trond Myklebust
2019-09-19 19:21       ` Alkis Georgopoulos
2019-09-19 19:51         ` Trond Myklebust
2019-09-19 19:57           ` Alkis Georgopoulos
2019-09-19 20:05             ` Trond Myklebust
2019-09-19 20:20               ` Alkis Georgopoulos
2019-09-19 20:40                 ` Trond Myklebust
2019-09-19 21:19                   ` Daniel Forrest
2019-09-19 21:42                     ` Trond Myklebust
2019-09-19 22:16                       ` Daniel Forrest
2019-09-20  9:25                         ` Alkis Georgopoulos
2019-09-20  9:48                           ` Alkis Georgopoulos
2019-09-20 10:04                             ` Alkis Georgopoulos
2019-09-21  7:52                               ` Alkis Georgopoulos
2019-09-21  7:59                                 ` Alkis Georgopoulos
2019-09-21 11:02                                   ` Alkis Georgopoulos

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=80353d78-e3d9-0ee2-64a4-cd2f22272fbe@gmail.com \
    --to=alkisg@gmail.com \
    --cc=linux-nfs@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).