On Monday 14 March 2005 18:21, Stephen Hemminger wrote:
> On Mon, 14 Mar 2005 17:45:06 +0100
>
> Bernd Schubert <bernd.schubert@xxxxxxxxxxxxxxxxxxxxx> wrote:
> > Hi,
> >
> > until one hour ago I thought this bug affects only 3com 3c509B cards. Now
> > we go on switching more and more systems from 2.4.X to 2.6.X and it seems
> > that many cards work much slower with 2.6.X
> >
> > with 2.4.27:
> > =========
> > bernd@pc-brenn bernd>nttcp -T hamilton2
> > Bytes Real s CPU s Real-MBit/s CPU-MBit/s Calls Real-C/s
> > CPU-C/s l 8388608 0.72 0.02 92.7710 3355.4432 2048
> > 2831.15 102400.0 1 8388608 0.73 0.04 92.0581 1864.3941
> > 5783 7932.96 160661.2
> >
> > with 2.6.11.3:
> > ==========
> >
> > bernd@pc-brenn bernd>nttcp -T hamilton2
> > Bytes Real s CPU s Real-MBit/s CPU-MBit/s Calls Real-C/s
> > CPU-C/s l 8388608 3.29 3.28 20.3957 20.4569 2048
> > 622.43 624.3 1 8388608 3.29 0.04 20.3923 1637.0411
> > 6143 1866.67 149851.2
>
> What type is the other host (hamilton2) and what is the round trip delay?
> Is it on the same local network?
Yes of course, hamilton2 is on our local network. And of course, this is
completely independet of hamilton2, it can be reproduced with any local
system (as long as this system has full network speed, of course ;) ).
Round trip delay, e.g. the ping time?
Hmm, interesting!
2.4.27:
=====
bernd@wigner bernd>ping hamilton2
PING hamilton2.pci.uni-heidelberg.de (129.206.21.202): 56 data bytes
64 bytes from 129.206.21.202: icmp_seq=0 ttl=64 time=0.1 ms
64 bytes from 129.206.21.202: icmp_seq=1 ttl=64 time=0.1 ms
64 bytes from 129.206.21.202: icmp_seq=2 ttl=64 time=0.1 ms
64 bytes from 129.206.21.202: icmp_seq=3 ttl=64 time=0.1 ms
64 bytes from 129.206.21.202: icmp_seq=4 ttl=64 time=0.1 ms
64 bytes from 129.206.21.202: icmp_seq=5 ttl=64 time=0.1 ms
2.6.11.3
======
bernd@wigner bernd>ping hamilton2
PING hamilton2.pci.uni-heidelberg.de (129.206.21.202): 56 data bytes
64 bytes from 129.206.21.202: icmp_seq=0 ttl=64 time=0.9 ms
64 bytes from 129.206.21.202: icmp_seq=1 ttl=64 time=0.4 ms
64 bytes from 129.206.21.202: icmp_seq=2 ttl=64 time=0.5 ms
64 bytes from 129.206.21.202: icmp_seq=3 ttl=64 time=0.4 ms
64 bytes from 129.206.21.202: icmp_seq=4 ttl=64 time=0.4 ms
64 bytes from 129.206.21.202: icmp_seq=5 ttl=64 time=0.4 ms
Thanks,
Bernd
--
Bernd Schubert
Physikalisch Chemisches Institut / Theoretische Chemie
Universität Heidelberg
INF 229
69120 Heidelberg
e-mail: bernd.schubert@xxxxxxxxxxxxxxxxxxxxx
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