Re: accuracy of pthread_make_periodic_np and clock_nanosleep
Der Herr Hofrat <[email protected]>
| Newsgroups | gmane.linux.real-time.rtlinux.general |
|---|---|
| Message-ID | <[email protected]> |
> I recently installed rtlinux-3.2-pre2.tar.bz2 on my RedHat 9.0 system using
> kernel 2.4.20 from kernel.org. Installation was strait forward.
> I am specially interested in accurately (~10 us) execute some operations in
> exact intervalls.
> The hello.c test in the examples is doing something like this. I executed
> it, but got quite bad results on my HP Proliant server with Pentium4 2.8 GHz.
> In 99% of the cases it is very accurate, 11 to 12 us behing the given
> target. But sometimes I get up to 400 us delays/inaccuracies.
that sounds far off - both the "good" values of 11 to 12 and obviously the 400
do you have any details on the hardware ?
Is that box on the net by any chance - I would be interested in giving it a
look if posible.
hofrat
ps.: for all that could not attend in Singapur at the workshop
the proceedings are on-line at:
ftp://www.realtimelinuxfoundation.org/pub/events/rtlws-2004
_______________________________________________
Rtl mailing list
[email protected]
http://www2.fsmlabs.com/mailman/listinfo/rtl