* john stultz <[EMAIL PROTECTED]> wrote: > On Wed, 2007-01-24 at 10:41 +0100, John wrote: > > I'm using the POSIX timers API. My platform is x86 running Linux > > 2.6.18.6 patched with the high-resolution timer subsystem. > > > > http://www.tglx.de/hrtimers.html
> > My process is the only SCHED_FIFO process on the system. There are > > no user-space processes with a higher priority. AFAICT, only a > > kernel thread could keep the CPU away from my app. > > > > Is there a periodic kernel thread that runs every 2 seconds, cannot > > be preempted, and runs for over 50 µs?? > > This sounds like a BIOS SMI issue. Can you reproduce this behavior on > different hardware? note that only the -hrt patchset is used - not the full -rt patchset - so 50 usecs delays (and more) are quite possible and common. My question would be: does the same problem occur with the full -rt patchset and PREEMPT_RT? (see http://rt.wiki.kernel.org for details) Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
