Date: Fri, 13 Mar 2015 08:52:37 -0400 From: Tom Pusateri <pusateri@bangj.com> To: Paul Mather <paul@gromit.dlib.vt.edu> Cc: "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org>, Bernd Walter <ticso@cicely7.cicely.de> Subject: Re: BeagleBone slow inbound net I/O Message-ID: <BA350D9F-42D6-4C6E-9535-507098FE73E8@bangj.com> In-Reply-To: <E5292790-BAE2-41BC-BC76-A31C3C7ED76B@gromit.dlib.vt.edu> References: <20150311165115.32327c5a@ivory.wynn.com> <20150312133433.GB28385@cicely7.cicely.de> <20150312232641.4365263d@ivory.wynn.com> <E5292790-BAE2-41BC-BC76-A31C3C7ED76B@gromit.dlib.vt.edu>
next in thread | previous in thread | raw e-mail | index | archive | help
--Apple-Mail=_0BC6C9EC-6A10-49F8-B933-10BB1F383E63 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii > On Mar 13, 2015, at 8:34 AM, Paul Mather <paul@gromit.dlib.vt.edu> = wrote: >=20 > On Mar 12, 2015, at 11:26 PM, Brett Wynkoop <freebsd-arm@wynn.com> = wrote: >=20 >> Greeting- >>=20 >> It is confirmed, the net I/O is much slower than reading from the SD >> card. Here is another run of tar - pipe - tar, but this time the >> source is the sd card and the destination is still the USB zfs. >=20 >=20 > The Beaglebone uses a USB NIC so any I/O to/from SD card will be = competing for resources and potentially slowing things down. >=20 > Have you tried outputting to /dev/null to get a more accurate sense of = how performant the network I/O alone is? Alternatively, how about using = something like benchmarks/netperf? benchmarks/iperf is a good one too. It will figure out the maximum = bandwidth you can sustain. It's available on Linux and Mac OSX too for = the other end of the test. # run this on one side of the connection and it will start listening as = a server: % iperf -s # on the client side, pick an IP address on the server % iperf -c <ip address of server> There's a pretty nice article here about other features of iperf too: = http://crok-linkblog.homelinux.com/links-cisco/how-to-use-iperf-properly-a= dditions-to-the-tcp-throughput-post/ Tom --Apple-Mail=_0BC6C9EC-6A10-49F8-B933-10BB1F383E63 Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP using GPGMail -----BEGIN PGP SIGNATURE----- Comment: GPGTools - http://gpgtools.org iQEcBAEBAgAGBQJVAt2VAAoJEPk0GMVmUuYM/fUH/RCGFwhAQftuxgM/M5XTts/G GkDatDMmiUtE7g2K9hWj5sXdl6SduDglnseDEYF/iIgzttah9FqvkWuA8BO1mi5L tlJzfXKv/M3Wcmjxj4Kug/duDJUdTUaiXU1U6DPVgeI7FLy4C+sEoKsXkZ7M0fXi V+QEQI1xeOY3iXJ2MAPrwuyv8GqhmG1TvhJp925A1I5esXbtn4gIczKhQA+MS8Q1 OovRMO6ov3BO+SgsRpdo91e6Ox5ZHfgrjL+dt1I9T3er3TLzSbqFh85vw3g9Tbo8 DDpGMYsR5HJ9Ji9d5rA5jfusSByaYLLfEwL+CyG8vQJK/5dPQKA5uRUbkE3IKYg= =8aFb -----END PGP SIGNATURE----- --Apple-Mail=_0BC6C9EC-6A10-49F8-B933-10BB1F383E63--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?BA350D9F-42D6-4C6E-9535-507098FE73E8>