Date: Mon, 17 Mar 2014 21:26:23 -0400 (EDT) From: Rick Macklem <rmacklem@uoguelph.ca> To: FreeBSD Filesystems <freebsd-fs@freebsd.org> Cc: Alexander Motin <mav@freebsd.org> Subject: review/test: NFS patch to use pagesize mbuf clusters Message-ID: <570922189.23999456.1395105983047.JavaMail.root@uoguelph.ca> In-Reply-To: <1351117550.23999435.1395105975009.JavaMail.root@uoguelph.ca>
next in thread | previous in thread | raw e-mail | index | archive | help
------=_Part_23999454_1976975027.1395105983045
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit
Hi,
Several of the TSO capable network interfaces have a limit of
32 mbufs in the transmit mbuf chain (the drivers call these transmit
segments, which I admit I find confusing).
For a 64K read/readdir reply or 64K write request, NFS passes
a list of 34 mbufs down to TCP. TCP will split the list, since
it is slightly more than 64K bytes, but that split will normally
be a copy by reference of the last mbuf cluster. As such, normally
the network interface will get a list of 34 mbufs.
For TSO enabled interfaces that are limited to 32 mbufs in the
list, the usual workaround in the driver is to copy { real copy,
not copy by reference } the list to 32 mbuf clusters via m_defrag().
(A few drivers use m_collapse() which is less likely to succeed.)
As a workaround to this problem, the attached patch modifies NFS
to use larger pagesize clusters, so that the 64K RPC message is
in 18 mbufs (assuming a 4K pagesize).
Testing on my slow hardware which does not have TSO capability
shows it to be performance neutral, but I believe avoiding the
overhead of copying via m_defrag() { and possible failures
resulting in the message never being transmitted } makes this
patch worth doing.
As such, I'd like to request review and/or testing of this patch
by anyone who can do so.
Thanks in advance for your help, rick
ps: If you don't get the attachment, just email and I'll
send you a copy.
------=_Part_23999454_1976975027.1395105983045
Content-Type: text/x-patch; name=4kmcl.patch
Content-Disposition: attachment; filename=4kmcl.patch
Content-Transfer-Encoding: base64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------=_Part_23999454_1976975027.1395105983045--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?570922189.23999456.1395105983047.JavaMail.root>