[Beowulf] Re: Cheap SDR IB

Jeff Blasius jeff.blasius at yale.edu
Wed Jan 30 13:24:57 PST 2008

On Jan 30, 2008 4:05 PM, David Mathog <mathog at caltech.edu> wrote:
> Joe Landman <landman at scalableinformatics.com> wrote:
> > Gilad Shainer wrote:
> >
> > >> IB for gaming?  I have one ratio: 1e-1/3e-6.  that's human
> > >> reaction time versus IB latency.
> > >>
> > >
> > > Oh yes... I guess you did not play for a long time. Did you? Talk
> > > with someone who suffer from lagging and you will get the story, even
> > > When he has a great video card. It's the network and the CPU overhead
> > > that are the cause of this issue
> >
> > Er... ah ... yeah.  Milliseconds is typical in FPS games.  hundreds of
> > ms are bad.  Hundreds of microseconds aren't ... ok, depends upon your
> > FPS, I am sure the military folks have *really* fun ones which require
> > that sort of latency.
> Many FPS games are still keyboard driven, and the scan rate on the
> keyboard is likely only on the order of 10Hz.  Gaming mice scan position
> a lot faster though, last I looked they were closing in on 10000 data
> points per second. Even so, human reaction time is now, and probably
> will be forever, at the .1 second level, so even if that gaming mouse
> could record 1000 button presses a second, no gamer is ever going to be
> able to push that button at anywhere near that rate.
> IB would be massive overkill for gaming, 100 (or even 10) baseT should
> work just fine unless the network is hideously congested, in which case
> the game is probably going to become unplayable due to dropped UDP packets.

Yes, but put "Gaming" in front of any device name and it'll sell.
Gaming mice are a good example. This is another
The $300 NIC.

> Regards,
> David Mathog
> mathog at caltech.edu
> Manager, Sequence Analysis Facility, Biology Division, Caltech
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Jeff Blasius / jeff.blasius at yale.edu
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High Performance Computing (HPC)
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