Daniel Simon wrote:
> Hi all,
>
> I'm doing some tests with the native skins. The attached program uses
> an alarm to trigger a periodic task and measures the sampling latency.
>
> Initial latencies are in the range of tens of millisecs. and then
> decrease slowly to the range of microsecs:
>
> rt_timer_set_mode(TM_ONESHOT) started
> alarm started with period 1000000000 ns
> increment 1124642266 absjitter 124642266
> increment 937743828 absjitter 62256172
> increment 1031095424 absjitter 31095424
> increment 984466651 absjitter 15533349
> increment 1007758686 absjitter 7758686
> increment 996126407 absjitter 3873593
> increment 1001934707 absjitter 1934707
> increment 999039749 absjitter 960251
> increment 1000477139 absjitter 477139
> increment 999759707 absjitter 240293
> increment 1000119631 absjitter 119631
> increment 999938964 absjitter 61036
> increment 1000029816 absjitter 29816
> increment 999985508 absjitter 14492
> increment 1000004750 absjitter 4750
> increment 999998882 absjitter 1118
> increment 1000000946 absjitter 946
> increment 999998780 absjitter 1220
> increment 1000001951 absjitter 1951
> increment 999999514 absjitter 486
> increment 999998746 absjitter 1254
> [...]
>
> What may be wrong?
Are you still running a kernel with ACPI_PROCESSOR ?
--
Gilles Chanteperdrix.
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