As far as I can tell, this is unrelated to newbus as the same actions would trigger this problem before and after newbus.
I have been seeing this problem for many months (maybe years - but I've only recently identified a set of actions to reproduce it every time). The wierd thing is that I can download heaps of stuff all at the same time (at 48000 baud) and get over 5.5 K/s without a silo overflow BUT as soon as I run MAME, the serial port is stuffed and requires a reboot to do the smallest amount of traffic. NOTE: This occurs AFTER I exit MAME or while I keep it running!!!! Very strange. And its not just on this hardware. I'd just like someone to try to reproduce this. I realise that downloading a MAME ROM is problematic but surely someone out there owns an old space invaders machine or something similar. Poul-Henning Kamp wrote: > > Bruce said, in his own quite way, that somebody had broken fast > interrupts as part of newbus, and that is the end of that story. > > Poul-Henning > > In message <22229.926181...@zippy.cdrom.com>, "Jordan K. Hubbard" writes: > >> I mailed a simple way to reproduce the serious brokeness of the > >> serial port driver on my system and no one responds. > >> > >> What does this mean ? > > > >It means that nobody is probably willing to go bring up a MAME > >environment just to test this. You need to isolate it to a more > >minimal test case if you want people to jump on what could be a local > >problem (some serial hardware is better behaved than others) or a > >misbehaving X server (which is masking interrupts for too long; see > >mailing list archives on this topic). The more complex your > >reproduction case, in other words, the less likely it is that anyone > >will respond to it. > > > >If you can say "here's a small stand-alone C program which hogs things > >to the extent that the serial driver seriously overruns its buffers" > >then it's likely that someone will be at least motivated to compile, > >run and try it. If it involves running some esoteric application > >which requires downloading data of questionable legality on top of it, > >it's far less likely that anyone will even bother to look. > > > >- Jordan > > > > > >To Unsubscribe: send mail to majord...@freebsd.org > >with "unsubscribe freebsd-current" in the body of the message > > > > -- > Poul-Henning Kamp FreeBSD coreteam member > p...@freebsd.org "Real hackers run -current on their laptop." > FreeBSD -- It will take a long time before progress goes too far! > > To Unsubscribe: send mail to majord...@freebsd.org > with "unsubscribe freebsd-current" in the body of the message -- /=======================================================================\ | Work: matthew.th...@dsto.defence.gov.au | Home: thy...@camtech.net.au | \=======================================================================/ "If it is true that our Universe has a zero net value for all conserved quantities, then it may simply be a fluctuation of the vacuum of some larger space in which our Universe is imbedded. In answer to the question of why it happened, I offer the modest proposal that our Universe is simply one of those things which happen from time to time." E. P. Tryon from "Nature" Vol.246 Dec.14, 1973 To Unsubscribe: send mail to majord...@freebsd.org with "unsubscribe freebsd-current" in the body of the message
