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Re: [rtl] Maximum RT-FIFO size and lost data on RT_interrupt
I think the isa bus is limited to a 1MBps the isa bus.
I'd use a PCI parallel adapter (www.lavalink.com) if its a regular rack
mount box anyways, as appose to a single board job.
On Tue, 14 Jul 1998, Adolf Ahmad MS wrote:
> Dear Kai,
>
> Thank you for your good answer.
> But, I used P120 And ISA bus can reach 2 MBps.
>
> Sincerely yours,
>
>
>
> <adolf@ratelindo.co.id>
> OMC Switching Div
> Wisma Bakrie Lt. 5,
> Jl. HR. Rasuna Said Kav B1
> Jakarta
> Telp. 9101112 ext. 411
>
> > ----------
> > From: Kai Mueller[SMTP:mueller@leo.ifr.ing.tu-bs.de]
> > Sent: Tuesday, July 14, 1998 3:38 PM
> > To: Adolf Ahmad MS
> > Cc: rtl@rtlinux.cs.nmt.edu
> > Subject: Re: [rtl] Maximum RT-FIFO size and lost data on
> > RT_interrupt
> >
> > On Tue, Jul 14, 1998 at 09:16:58AM +0700, Adolf Ahmad MS wrote:
> > > Dear All,
> > >
> > > I have one experience on implementation RT-Linux by employing
> > Interrupt
> > > Request 7 on EPP/LPT port, and one FIFO with size 8192 bytes. But,
> > some
> > > times there are many data lost, it seem caused by n-th interrupt can
> > not
> > > process by CPU , some times on 200th IRQ, 240th IRQ, 600th IRQ, etc
> > .
> > > For information, the data stream speed is 40 kbytes/s and running on
> > > Pentium 120.
> > >
> > > * Why many interrupt are lost on my program RT-Linux ?
> > > * How many bytes the maximum FIFO on RT-Linux ?
> > >
> > >
> > >
> > > I don't know what is wrong in my code.
> >
> > I would assume that nothing is wrong with your code.
> > If you have a data rate of 40KBytes/s and every byte
> > causes an interrupt than you have propably reached the
> > limit of performance on your system.
> >
> > Kai
> >
> > --
> > Kai P. Mueller
> > Control Department (Regelungstechnik) | Phone [+49] (531) 391-3835
> > Technical University Braunschweig | Fax [+49] (531) 391-5194
> > D-38092 Braunschweig | Email
> > mueller@ifr.ing.tu-bs.de
> >
> --- [rtl] ---
> For more information on Real-Time Linux see:
> http://www.rtlinux.org/
>
--- [rtl] ---
For more information on Real-Time Linux see:
http://www.rtlinux.org/