On Sat, 6 Feb 1999, Paolo Mantegazza wrote:
> I can assure you that period variations above give substantially the
> same results you get if you measure the jitter using a scope, at almost
> no cost, so that you can keep it during actual operation to monitor if
> you are loosing interrupts of whatever else.
This is exactly how I measured the jitter affecting the scheduling
time of a periodic, real-time task under RT-Linux. I was testing
a 386sx 20Mhz on a PC104 board, and to perform the measurement
I added a PC104 module featuring two Intel 8254 counters.
The results agree very well with those obtained using a digital oscilloscope.
ciao, Ciro
--
Ciro Cattuto e-mail: [EMAIL PROTECTED]
[EMAIL PROTECTED]
University of Perugia - Physics Department [EMAIL PROTECTED]
INFN - VIRGO Project voice: +39 075 585 3060
PLUTO Linux Users Group fax: +39 075 44666
--- [rtl] ---
To unsubscribe:
echo "unsubscribe rtl" | mail [EMAIL PROTECTED] OR
echo "unsubscribe rtl <Your_email>" | mail [EMAIL PROTECTED]
----
For more information on Real-Time Linux see:
http://www.rtlinux.org/~rtlinux/
