Re: Incorrect Throughput Summaries in UDP?
it is in the autoconf setup already. we need to figure out why it doesn't
work on that version of linux. see config.h, approx line 48 (search for
int64).
On Thu, Feb 27, 2003 at 03:53:23PM -0600, Kevin Gibbs wrote:
> Actually I was thinking the same thing as I was typing the response.
> However I do not know autoconf at all, so I am not sure when I will change
> that. I also want to add a --disable-threads and --disable-ipv6 arguements
> to the configure script but also do not know how to do that. Is there
> anything else that needs to be changed/added to the configure script that
> anyone can think of? If I mess with it, might as well get as much done as
> possible.
>
> Kevin
>
> On Thu, 27 Feb 2003, Hans Blom wrote:
>
> > It would be nice if that "long long" check could be incoporated in the
> > autoconfigure. Now it always has to be changed manulally. Or are there
> > problems connected with the autoconfigure of the "unsigned long long".
> >
> > Hans
> >
> > On Thu, Feb 27, 2003 at 01:56:30PM -0600, Kevin Gibbs wrote:
> > > For I assume you mean redhat 7.2 since I know of no versions for "linux"
> > > other than perhaps kernel versions. It should be automatic. You have not
> > > updated or are not using an old headers.h are you? When the configure
> > > script is running does it say you have a int64_t available? if not does it
> > > say that you have a long long available and then later that its size is
> > > 8? If you do not have a int64_t but a long long of size 8 then you can
> > > change the headers.h to use long long instead of trying to use int64_t.
> > > The change needs to be made at the very bottom of headers.h where it
> > > defines maxsize_t. Just define it to long long.
> > >
> > > Kevin
> > >
> > > On Thu, 27 Feb 2003, Yee-Ting Li wrote:
> > >
> > > > On Thu, 27 Feb 2003, Kevin Gibbs wrote:
> > > >
> > > > > What operating system are you using? It would appear that iperf did not
> > > > > find a 64bit integer to use as the total amount of traffic. As such you
> > > > > overflowed your 32bit integer at 4GB.
> > > >
> > > > linux 7.2 - i compiled from source - is there a compile flag i should set?
> > > >
> > > > Thanks,
> > > >
> > > > Yee.
> > > >
> > > > >
> > > > > Kevin
> > > > >
> > > > > On Thu, 27 Feb 2003, Yee-Ting Li wrote:
> > > > >
> > > > > > Hello,
> > > > > >
> > > > > > We're trying to do some iperf tests through an uncongested network using UDP
> > > > > > streams, reporting the rate every 2 seconds for 1 minute. We're using iperf
> > > > > > 1.6.5 with pthreads and we get some strange reporting of the summary result:
> > > > > >
> > > > > >
> > > > > > ------------------------------------------------------------
> > > > > > Server listening on UDP port 5010
> > > > > > Receiving 1472 byte datagrams
> > > > > > UDP buffer size: 2097152 Byte (WARNING: requested 1048576 Byte)
> > > > > > ------------------------------------------------------------
> > > > > > [ 3] local xxx.xxx.xxx.xxx port 5010 connected with
> > > > > > xxx.xxx.xxx.xxx port 32769
> > > > > > [ ID] Interval Transfer Bandwidth Jitter Lost/Total
> > > > > > Datagrams
> > > > > > [ 3] 0.0- 2.0 sec 204248832 Bytes 816993694 bits/sec 0.015 ms
> > > > > > 41676/180432 (23%)
> > > > > ...
> > > > > > [ 3] 58.0-60.0 sec 197239168 Bytes 788955489 bits/sec 0.012 ms
> > > > > > 47441/181435 (26%)
> > > > > > [ 3] 0.0-60.0 sec 1559126656 Bytes 207849079 bits/sec 0.012 ms
> > > > > > 1466661/5443627 (27%)
> > > > > > [ 3] 0.0-60.0 sec 2 datagrams received out-of-order
> > > > > >
> > > > > >
> > > > > >
> > > > > > As you can see, the summary rate is much smaller than that reported by the
> > > > > > regular intervals; also, the total number of bytes transfered is about a third
> > > > > > less than the accumulated count.
> > > > > >
> > > > > > We repeated the test a few times and the report is similar in all tests.
> > > > > >
> > > > > >
> > > > > > Any comments/suggestions appreciated!
> > > > > >
> > > > > > Yee.
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > > >
> > > >
> > >
> >
--
Jon Dugan | Senior Network Engineer, NCSA Network Research
jdugan --at-- ncsa.uiuc.edu | 269 CAB, 605 E Springfield, Champaign, IL 61820
217-244-7715 | http://www.ncsa.uiuc.edu/~jdugan/