greg wrote:
Hi folks,
I'm looking for a timer resolution lower than 1 ms (and monotonic clock
rate) destined to be used with some network code running on x86
platforms. Would you please provide me with informations about how to
get/implement this.
AFAIK, there's a "high resultion timer" patch hanging around, but
there's not much informations with regard to portability (specific
hardware requirements ?), scalability, integration with RT patches.
I understand the POSIX 1003.1b Clocks and Timers system calls are not
fully available within the linux kernel (and libc ?), am I right on that ?
On the HRT web site (see signature) there is a CVS repository. In there
is a special version for the RT kernel. As to porting it to other
archs, have a look at the include/linux/hrtimer.h file. It has (or
should have) all you need to know. Please pass back any port you do.
One more question : I believe Ingo's preemption patch run
timers/interrupt handlers within kernel threads, how should I assign
specific priority to address my goals without compromising system
stability ?
Carefully :)
--
George Anzinger george@mvista.com
HRT (High-res-timers): http://sourceforge.net/projects/high-res-timers/
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