Date: Wed, 11 Mar 2015 16:51:15 -0400 From: Brett Wynkoop <freebsd-arm@wynn.com> To: "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org> Subject: BeagleBone slow inbound net I/O Message-ID: <20150311165115.32327c5a@ivory.wynn.com>
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Greeting-
So I am finding that network reads from my nfs server are timing out on
the BeagleBone. I am having no similar issues with other nfs clients
on my network.
In an attempt to eliminate NFS as a possible reason for slowness of
transferring the ports tree into the system I am now transferring by
piping tar through nc. This is after I had a failure with rsync
inbound on the same data. The transfer is going VERY slow. Many times
slower than my transfers out of the BB to my 10.1 server.
Have I managed to find a network driver issue? Any ideas how to gather
more information to help get to the bottom of things?
Netstat seems to provide nothing useful:
[wynkoop@beaglebone ~]$ netstat -i
Name Mtu Network Address Ipkts Ierrs Idrop Opkts Oerrs Coll
cpsw0 1500 <Link#1> 00:18:31:8c:a5:22 0 0 0 0 0 0
cpsw0 - 199.89.147.0 beaglebone 1117 - - 511 - -
lo0 16384 <Link#2> 36 0 0 36 0 0
lo0 - localhost ::1 0 - - 0 - -
lo0 - fe80::1%lo0 fe80::1%lo0 0 - - 0 - -
lo0 - your-net localhost 36 - - 36 - -
[wynkoop@beaglebone ~]$
I do not believe the transfer is limited by disk i/o because
zpool iostat 5 shows inferior speed as compared to when I did the copy from
the sd card to the usb stick.
[wynkoop@beaglebone ~]$ zpool iostat 5
capacity operations bandwidth
pool alloc free read write read write
---------- ----- ----- ----- ----- ----- -----
bbexport 283M 14.1G 0 0 787 1.15K
bbexport 283M 14.1G 0 5 0 28.1K
bbexport 283M 14.1G 0 0 0 0
bbexport 283M 14.1G 0 0 0 0
bbexport 283M 14.1G 0 5 0 28.2K
bbexport 283M 14.1G 0 0 0 0
bbexport 283M 14.1G 0 0 0 0
bbexport 283M 14.1G 0 6 0 29.6K
bbexport 283M 14.1G 0 0 0 0
bbexport 283M 14.1G 0 0 0 0
bbexport 283M 14.1G 0 5 0 29.5K
bbexport 283M 14.1G 0 0 0 0
-Brett
--
wynkoop@wynn.com http://prd4.wynn.com/wynkoop/pgp-keys.txt
917-642-6925
929-272-0000
If cowardly and dishonorable men sometimes shoot unarmed men with army
pistols or guns, the evil must be prevented by the penitentiary and
gallows, and not by a general deprivation of a constitutional privilege.
-Honorable J. A. Williams, Circuit Judge -
Wilson v. State, 33 Ark. 557, 34 Am. Rep. 52 (1878).
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