POSIX High Resolution Timers in LinuxPPC 2.4

[Egan]

 > Hi Tim,
 > 
 > On Friday 16 December 2005 23:34, Martin, Tim wrote:
 > > Could someone give me a brief history lesson on POSIX high resolution
 > > timers (e.g. timer_create() function) implemented in the Linux kernel on
 > > the PowerPC 405 architecture?  Specifically:
 > >
 > > Confirm they are in the mainline 2.6 kernel now (e.g. kernel.org)?
 > >
 > > Were they ever a part of the "mainline" 2.4 linuxppc kernel (e.g
 > > ppc.bkbits.net)?
 > >
 > > If no, were they ever available as a patch? The stuff at
 > > sourceforge.net/projects/high-res-timers stops at 2.4.20 and looks like it
 > > was only ever working for i386, not ppc.
 > 
 > I asked a related question a while back, and got no answer (yet).
 > I did find this though, which you might have overlooked:
 > http://prdownloads.sourceforge.net/high-res-timers/ppc-hrt-2.6.10.patch?download
 > 
 > I am equally puzzled about whether this has made it into mainstream, is about 
 > to, or never will. I don't even know if it actually works.
 > 
 > Greetings,
 > 
 > -- 
 > 
 > David Jander
 > Protonic Holland.
 > 

High resolution timer support has been rewritten for 2.6 by Thomas Gleixner
with help from Ingo Molnar and others and is available at:
http://tglx.de/hrtimers.html.  It is also integrated into Ingo's
realtime-preempt patch at: http://people.redhat.com/mingo/realtime-preempt/.
It is not available in the mainline kernel yet.  Currently only X86 is
supported, PPC and other architectures are reported to be in progress.  If you
monitor the LKML you will see a lot of discussion/development in this area
right now.

Regards,
Tony