lkml.org 
[lkml]   [1999]   [Apr]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    SubjectRe: A/D converter
    Date
    From
    > On Tue, Apr 20, 1999 at 01:13:40PM -0400, Richard B. Johnson wrote:
    > > There is, furthermore, no reason to do so. The fact that the original
    > > inquiry was about an ADC that "ran" at 70 kHz, means nothing about
    > > the speed at which it was expected to interrupt. In fact, the
    > > maximum rate at which you can interrupt Linux, and record that an
    > > interrupt occurred in your ISR (nothing else), is almost, but not
    > > quite, 50 kHz on a dual pentium running 400 MHz with a 100 Mhz main
    > > bus. I have a device-driver module which does little more than measure
    > > these kinds of things if you are interested.

    A Pentium-100 SBC, on a passive-ISA backplane can do about 140k
    interrupts per seconds.

    The case where I tested this, I had to do a few ISA IOs to acknowledge
    the interrupt, so the interrupt routine was NOT completely empty.

    This was autumn '96. I think the machine runs 2.0.18.

    Roger.

    --
    ** R.E.Wolff@BitWizard.nl ** http://www.BitWizard.nl/ ** +31-15-2137555 **
    *-- BitWizard writes Linux device drivers for any device you may have! --*
    ------ Microsoft SELLS you Windows, Linux GIVES you the whole house ------


    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.rutgers.edu
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2005-03-22 13:51    [W:0.019 / U:29.412 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site