NDT-DEV email list created

[Richard Carlson <>]

Aaron et.al.

The whole point of NDT is to gather the kernel data to answer questions 
like this.  So, what did the kernel collect?  Look at the server's log 
file and see what it says.  Tell the server to run with the ndttrace and 
snaplog options turned on.  You'll get a packet level trace you can run 
through something like wireshark and a 5msec report of every Web100 
variable for the 10 sec S2C test.

You don't need to guess why the performance sucks, just ask TCP what the 
hell it was doing!

Rich

PS: this is exactly why just reporting throughput speeds is the wrong 
thing to do.  You want to report WHY the test spit out those numbers. 
The Web100 kernel gives you some glimpse into that process.  Use it!

On 04/06/2015 01:58 PM, Aaron Brown wrote:
> Does anyone have a good explanation for these horrible performance
> results? Is it really just that flash is unpredictably awful on every
> platform but windows?
>
> Cheers,
> Aaron
>
> > Begin forwarded message:
> >
> > *Date: *April 6, 2015 at 11:48:09 AM EDT
> > *From: *Jeremy Palmer 
> > <
> > <mailto:>>
> > *To: *Kenneth D Miller II 
> > <
> >  
> > <mailto:>>,
> > Aaron Brown 
> > <
> >  
> > <mailto:>>
> > *Cc: 
> > *<
> >  
> > <mailto:>>
> > *Subject: **Re: Final(?) Release Candidate for NDT 3.7.0*
> >
> > I see the same issue with lower speeds when using Flash compared to
> > Java when running to your test host. In my case tho, I was seeing much
> > lower upload speeds with Flash compared to Java. Here were my results
> > (Windows 7, Java 8u31, Flash 17.0.0.134, FFox 37.0).
> >
> > Flash: 1.7Mb/s UP, 29.5Mb/s DOWN
> > Java: 10.1Mb/s UP, 29.7Mb/s DOWN
> >
> > I ran multiple tests and each time results were similar to the above.
> > Jeremy Palmer
> > Senior Network Engineer
> > ViaWest, Inc.
> > Office: 720.891.1045
> > Fax: 303-874-5236
> > http://www.viawest.com
> > On 4/6/2015 9:29 AM, Kenneth D Miller II wrote:
> > > Hi Aaron,
> > >
> > > Comments:
> > >  - It seems like the flash version in Safari and Firefox is limited
> > > in OSX.  Maybe its me, you can test my server from
> > > http://128.118.46.248:7123/.  I just did a rpm -Uvh to the 2 URLs
> > > below and rebooted this test server.
> > >  - Chrome threw a warning about Flash and Upload was less the Safari
> > > and Firefox
> > >
> > > Here is some testing I did.
> > >
> > > From OSX:
> > > Safari Java:
> > > Up: 903.31mb/s
> > > Down: 941.33mb/s
> > >
> > > Safari Flash:
> > > Up: 832.42mb/s
> > > Down: 30.51mb/s
> > >
> > >
> > > Firefox Java:
> > > Up: 877.66 mb/s
> > > Down: 941.41mb/s
> > >
> > > Firefox Flash:
> > > Up: 809.62mb/s
> > > Down: 30.55mb/s
> > >
> > >
> > > Chrome Java:
> > > Up: 721.76 mb/s
> > > 941.38 mb/s
> > >
> > > Chrome Flash:
> > > Warning: Using the flash client in Chrome may provide less accurate
> > > results
> > > Up: 499.03 mb/s
> > > Down: 919.25 mb/s
> > >
> > >
> > > I have been downloading the ndt client for some time onto my laptop
> > > and run it from the CLI.  I scp /usr/ndt/Tcpbw100.jar to a directory,
> > > create a sub-directory called lib and download json-simple-1.1.1.jar.
> > >  Then I run
> > > sudo java -jar Tcpbw100.jar t248.npidev.psu.edu
> > > <http://t248.npidev.psu.edu> 3001
> > > and get the following java GUI results:
> > >
> > > Network Diagnostic Tool Client v3.7.0-rc1
> > > Click START to start the test
> > > ** Starting test 1 of 1 **
> > > Connecting to 't248.npidev.psu.edu <http://t248.npidev.psu.edu>'
> > > [t248.npidev.psu.edu/128.118.46.248
> > > <http://t248.npidev.psu.edu/128.118.46.248>] to run test
> > > Connected to: t248.npidev.psu.edu <http://t248.npidev.psu.edu>--
> > > Using IPv4 address
> > > WARNING: NDT server has different version number (3.7.0-rc3)
> > > Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done.
> > > Checking for firewalls . . . . . . . . . . . . . . . . . . . Done.
> > > running 10s outbound test (client-to-server [C2S]) . . . . . 858.44Mb/s
> > > running 10s inbound test (server-to-client [S2C]) . . . . . . 941.33Mb/s
> > > Sending META information . . . . . . . . . . . . . . . . . . . Done.
> > > The slowest link in the end-to-end path is a 1.0 Gbps Gigabit
> > > Ethernet subnet
> > > Click START to re-test
> > >
> > >
> > > Here are the CLI results and output:
> > > DHCP-128-118-46-198:Downloads kdm193$ sudo java -jar Tcpbw100.jar
> > > t248.npidev.psu.edu <http://t248.npidev.psu.edu> 3001
> > > Password:
> > > wait flag received = 0
> > > Server version: 3.7.0-rc3-Web100
> > > WARNING: NDT server has different version number (3.7.0-rc3-Web100)
> > > 57778772 bytes 84026.57262315943 kb/s 5.501 secs
> > > Sending '84026.57262315943' back to server
> > > calling in2Socket.getLocalAddress()
> > > SFW: port=42563
> > > SFW: testTime=1
> > > SFW: oport=63435
> > > java.net.ConnectException: Connection refused
> > > at java.net.PlainSocketImpl.socketConnect(Native Method)
> > > at
> > > java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:345)
> > > at
> > > java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
> > > at
> > > java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
> > > at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
> > > Simple firewall test: Improper message
> > > at java.net.Socket.connect(Socket.java:589)
> > > at edu.internet2.ndt.Tcpbw100.test_sfw(Tcpbw100.java:1653)
> > > at edu.internet2.ndt.Tcpbw100.dottcp(Tcpbw100.java:2801)
> > > at edu.internet2.ndt.Tcpbw100$TestWorker.run(Tcpbw100.java:615)
> > > at java.lang.Thread.run(Thread.java:745)
> > > ******Send buffer size =8192
> > > SocketException while writing to serverjava.net.SocketException:
> > > Socket closed
> > > 10005.0 millisec test completed,65536,16414
> > > 860136.2550724638 kb/s outbound
> > > 1178075136 bytes 941330.5121853775 kb/s 10.012 secs
> > > Sending '941330.5121853775' back to server
> > > USERAGENT null
> > > Calling InetAddress.getLocalHost() twice
> > >
> > >
> > >
> > >
> > > Thanks,
> > > Ken
> > >
> > > Network Systems Engineer
> > > Network Development Engineering, TNS, ITS
> > > Penn State University
> > > My Calendar Free/Busy -
> > > https://ucs.psu.edu/home//Calendar.html
> > > Chair Internet2 Performance Working Group
> > > SuperComputing SCinet Measurement Team Member
> > >
> > >
> > >
> > >
> > >
> > >
> > > ------------------------------------------------------------------------
> > >
> > >     *From: *"Aaron Brown" 
> > > <>
> > >     *To: 
> > > *
> > >     *Sent: *Friday, April 3, 2015 3:07:23 PM
> > >     *Subject: *Final(?) Release Candidate for NDT 3.7.0
> > >
> > >     Hi All,
> > >
> > >     We have the, hopefully, final release candidate for a new NDT
> > >     release. This release candidate includes a number of fixes and
> > >     changes since -rc1.
> > >
> > >     Among other things, version 3.7.0 will include:
> > >       - A java client that works with Java 8
> > >       - A flash-based client
> > >       - A new web GUI
> > >       - Support for using Apache instead of ‘fakewww'
> > >
> > >     This is a beta-test version, and is not recommended for general
> > >     use yet. However, we're hoping that, with some testing in the
> > >     community, this can be improved quickly and a production release
> > >     can happen relatively soon. We're especially interested in
> > >     feedback on how easy it is to use the various new tools, and
> > >     features.
> > >
> > >     Tarball:
> > >     
> > > http://ndb1.internet2.edu/~aaron/ndt-3.7.0-4.el6.x86_64/ndt-3.7.0-rc3.tar.gz
> > >     
> > > <http://ndb1.internet2.edu/%7Eaaron/ndt-3.7.0-4.el6.x86_64/ndt-3.7.0-rc3.tar.gz>
> > >
> > >
> > >     RH6/x86:
> > >
> > >     
> > > http://ndb1.internet2.edu/~aaron/ndt-3.7.0-4.el6.x86_64/ndt-client-3.7.0-4.el6.i686.rpm
> > >     
> > > <http://ndb1.internet2.edu/%7Eaaron/ndt-3.7.0-4.el6.x86_64/ndt-client-3.7.0-4.el6.i686.rpm>
> > >     
> > > http://ndb1.internet2.edu/~aaron/ndt-3.7.0-4.el6.x86_64/ndt-server-3.7.0-4.el6.i686.rpm
> > >     
> > > <http://ndb1.internet2.edu/%7Eaaron/ndt-3.7.0-4.el6.x86_64/ndt-server-3.7.0-4.el6.i686.rpm>
> > >     
> > > http://ndb1.internet2.edu/~aaron/ndt-3.7.0-4.el6.x86_64/ndt-server-apache-3.7.0-4.el6.i686.rpm
> > >     
> > > <http://ndb1.internet2.edu/%7Eaaron/ndt-3.7.0-4.el6.x86_64/ndt-server-apache-3.7.0-4.el6.i686.rpm>
> > >  (only
> > >     needed to use Apache instead of fakewww)
> > >
> > >     RH6/x86-64:
> > >     
> > > http://ndb1.internet2.edu/~aaron/ndt-3.7.0-4.el6.x86_64/ndt-client-3.7.0-4.el6.x86_64.rpm
> > >     
> > > <http://ndb1.internet2.edu/%7Eaaron/ndt-3.7.0-4.el6.x86_64/ndt-client-3.7.0-4.el6.x86_64.rpm>
> > >     
> > > http://ndb1.internet2.edu/~aaron/ndt-3.7.0-4.el6.x86_64/ndt-server-3.7.0-4.el6.x86_64.rpm
> > >     
> > > <http://ndb1.internet2.edu/%7Eaaron/ndt-3.7.0-4.el6.x86_64/ndt-server-3.7.0-4.el6.x86_64.rpm>
> > >     
> > > http://ndb1.internet2.edu/~aaron/ndt-3.7.0-4.el6.x86_64/ndt-server-apache-3.7.0-4.el6.x86_64.rpm
> > >     
> > > <http://ndb1.internet2.edu/%7Eaaron/ndt-3.7.0-4.el6.x86_64/ndt-server-apache-3.7.0-4.el6.x86_64.rpm>
> > >  (only
> > >     needed to use Apache instead of fakewww)
> > >
> > >     SRPM:
> > >     
> > > http://ndb1.internet2.edu/~aaron/ndt-3.7.0-4.el6.x86_64/ndt-3.7.0-4.el6.src.rpm
> > >     
> > > <http://ndb1.internet2.edu/%7Eaaron/ndt-3.7.0-4.el6.x86_64/ndt-3.7.0-4.el6.src.rpm>
> > >
> > >
> > >     Cheers,
> > >     Aaron