Hello,
we have follow situation
u64 lrtdrv_time_of_irq_ns ;
void worker_task()
{
while(1)
{
rtdm_task_sleep_abs(lrtdrv_time_of_irq_ns + 950000ull,
RTDM_TIMERMODE_ABSOLUTE);
do_something();
}
}
_kernel_rtdm_irq_handler()
{
lrtdrv_time_of_irq_ns = rtdm_clock_read_monotonic();
}
the _kernel_irq_callback() is called every 1ms.
we will , that the worker_task begin 50us before next irq
But sometime, the worker task start ~50us after irq. Why ?
Sometime we call xntbase_adjust_time to sync external RTC with internal
clocks.
can this be a problem ?
Hardware & Software
X86 SMP Dual celeron
Linux Kernel 3.10.0
Xenomai 2.6.3
Regards
Johann
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