Mika Penttilä wrote:
>
> Just out of curiosity, how does the "sharing the local APIC timer" work
> with the SMP local APIC timer scheme. Hopefully not disable periodic
> timer tick on that cpu totally...?
>
> --Mika
Hi Mike,
Here is how I wire into the timer interrupt:
inline void smp_local_timer_interrupt(struct pt_regs * regs)
{
int cpu = smp_processor_id();
if (!run_posix_timers((void *)regs))
return;
... the original code continues.
I keep an in kernel Posix style timer queued for each cpu at
HZ frequency. If this timer has expired run_posix_timers returns
true and the normal local timer processing is done.
The code is not perfect yet. I don't honour changes in the
profiling multiplier.
Jim Houston - Concurrent Computer Corp.
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This archive was generated by hypermail 2b29 : Sat Dec 07 2002 - 22:00:30 EST