ndt-users list created

[Clayton Keller <>]

chet wrote:
> Clayton, time taken was 3 minutes to complete the 10s inbound test (server
> to client) portion on your server
> Mine does not finish at all
> Once the changes are made to the web100srv.c file does the program need
> compiling again or does the file that was edited work right away
>
> Martyn
>
> ----- Original Message ----- 
> From: "Clayton Keller" <>
> To: 
> <>
> Sent: Thursday, October 13, 2005 9:11 PM
> Subject: Re: Slow Inbound Tests
>
>
>
> > Clayton Keller wrote:
> >
> > > Richard Carlson wrote:
> > >
> > >
> > > > Hi Clayton;
> > > >
> > > > This is a bug in the web100srv code.  I forgot to shutdown the control
> > > > socket at the end of the test.  If there are multiple clients then the
> > > > final results are sent in a LIFO manner, so the first client needs to
> > > > wait until all subsequent clients are done before the results are
> > > > returned.
> > > >
> > > > I'll issue a patched version soon.  In the mean time you can patch
> > > > your version by hand by adding the line "shutdown(ctlsockfd,
> > > > SHUT_RDWR);" to the web100srv.c file (on line 1126).
> > > >
> > > > Let me know if that fixes things.
> > > >
> > > > Rich
> > > >
> > > >
> > > > ---------------------------------------------------------------
> > > > Original code:
> > > >        if (admin_view == 1) {
> > > >            totalcnt = calculate(SumRTT, CountRTT, CongestionSignals,
> > > > PktsOut, DupAcksIn, AckPktsIn,
> > > >                        CurrentMSS, SndLimTimeRwin, SndLimTimeCwnd,
> > > > SndLimTimeSender,
> > > >                        MaxRwinRcvd, CurrentCwnd, Sndbuf,
> > > > DataBytesOut, mismatch, bad_cable,
> > > >                        (int)bwout, (int)bwin, c2sdata, s2cack, 1,
> > > > debug);
> > > >            gen_html((int)bwout, (int)bwin, MinRTT, PktsRetrans,
> > > > Timeouts,
> > > >                        Sndbuf, MaxRwinRcvd, CurrentCwnd, mismatch,
> > > > bad_cable, totalcnt,
> > > >                        debug);
> > > >        }
> > > >
> > > >        /* printf("Saved data to log file\n"); */
> > > >
> > > >        /* exit(0); */
> > > > }
> > > >
> > > > main(argc, argv)
> > > >
> > > > ----------------------------------------------------------
> > > > Modified code
> > > >        if (admin_view == 1) {
> > > >            totalcnt = calculate(SumRTT, CountRTT, CongestionSignals,
> > > > PktsOut, DupAcksIn, AckPktsIn,
> > > >                        CurrentMSS, SndLimTimeRwin, SndLimTimeCwnd,
> > > > SndLimTimeSender,
> > > >                        MaxRwinRcvd, CurrentCwnd, Sndbuf,
> > > > DataBytesOut, mismatch, bad_cable,
> > > >                        (int)bwout, (int)bwin, c2sdata, s2cack, 1,
> > > > debug);
> > > >            gen_html((int)bwout, (int)bwin, MinRTT, PktsRetrans,
> > > > Timeouts,
> > > >                        Sndbuf, MaxRwinRcvd, CurrentCwnd, mismatch,
> > > > bad_cable, totalcnt,
> > > >                        debug);
> > > >        }
> > > >        shutdown(ctlsockfd, SHUT_RDWR);
> > > >        /* printf("Saved data to log file\n"); */
> > > >
> > > >        /* exit(0); */
> > > > }
> > > >
> > > > main(argc, argv)
> > > >
> > > >
> > > >
> > > >
> > > > At 01:54 PM 10/12/2005, Clayton Keller wrote:
> > > >
> > > >
> > > > > I wanted to address this to the list. I believe there was a similar
> > > > > post a week or so back but I wanted to address this clean.
> > > > >
> > > > > I currently have web100srv running from /etc/init.d/ndt with the
> > > > > following:
> > > > >
> > > > > /usr/local/sbin/web100srv -a -m -l /var/log/web100/web100srv.log
> > > > >
> > > > > The system is running on Fedora Core 4 using a patached 2.6.13 kernel
> > > > > from kernel.org.
> > > > >
> > > > > The server itself is also sitting behind a PIX firewall.
> > > > >
> > > > > We have noticed that the Outbound Test will run rather quickly, but
> > > > > when the Inbound, server to client, test is ran it can take upwards
> > > > > of several minutes to complete, many times as much as 4 minutes.
> > > > > There are other times where from the end user's point-of-view it
> > > > > appears the test never completes although you can see results for the
> > > > > test appear in the web100.log file. The test though will continue to
> > > > > sit on the unning 10s inbound test (server to client) . . . . . .
> > > > > portion of the test, and many users are beginning to just close out
> > > > > the window.
> > > > >
> > > > > At this point I am looking for general issues that I can look into
> > > > > and possibly run debug against as far as these tests are concerned.
> > > > >
> > > > > Clayton Keller
> > > >
> > > >
> > > >
> > > > ------------------------------------
> > > >
> > > >
> > > >
> > > > Richard A. Carlson                              e-mail:
> > > >
> > > > Network Engineer                                phone:  (734) 352-7043
> > > > Internet2                                       fax:    (734) 913-4255
> > > > 1000 Oakbrook Dr; Suite 300
> > > > Ann Arbor,  MI  48104
> > >
> > > Thanks Richard,
> > >
> > > I've got a test box I will apply and test to, then look at applying this
> > > to the live box and get some good "in the field testing". I'll let you
> > > know how things go.
> > >
> > > Clay
> >
> > Rich,
> >
> > It appears that there is still a long delay in the amount of time it
> > takes to complete the Inbound test (several minutes from my own personal
> > attempts). Could we be looking at network issues on my end. At time I do
> > see the following message returned as well:
> >
> > "Information: Other network traffic is congesting the link"
> >
> > If you would like to try it out for yourself and see if you can recreate
> > this delay, the test is available at:
> >
> > http://speedtest.ruraltel.net:7123/
> >
> > I'd be grateful for any other info I can get, as far as things to look
> > at and run debug against.
> >
> > Clay

I added the change - did a make clean - make - make install. If I need 
to modify my approach, please let me know.

Clay