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The Tuesday 2007-04-10 at 17:27 +0200, Roger Oberholtzer wrote:
> > > report data overruns. I also see missing characters in GPS data read
> > > over the serial port at this time.
> >
> > Surprising... :-O
>
> I get the point. But I do not think I have reached any resource limits
> when this happens. I know that is hard to judge. And I could be very
> wrong.
Yep. But it is indeed surprising that this could happen with current
hardware. I wasn't even aware that it could happen. You see, if a plain
8086 could cope (barely) at 115000, a pentium should not even cough.
It might be worth a bugzilla report...
Another idea. There are some settings in the kernel about how fast is the
task switcher clock and how interruptible are some tasks, and real time
settings. Playing with that could help. I have found that some times, when
a task is busy (mozilla!) the response to the keyboard is sluggish, might
be related to your problem. I have been playing a little with those
settings, but I'm not learned enough on linux kernels to recommend
anything conclusive.
> > If hardware handshaking is impossible, revert to software handshake (much
> > slower, chars have to be sent back)
>
> But the software handshake must require that the driver is getting
> called in time, no?
Exactly; in your case it wouldn't be much use, or none at all. Mmmm...
- --
Cheers,
Carlos E. R.
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