A Dimarts 25 Setembre 2007 16:09, Jan Kiszka va escriure:
> Hi,
>
> to make it short has anyone or could anyone try latest SVN over kernel
> 2.6.20 (i-pipe for 2.6.22 is instable) _without_ LAPIC?
I'm running a 2.6.22 kernel patched with xenomai trunk (last week) and booting
with noapic in the grub.
In the test, I got:
running: ./run -- -sh -T 120 -t0 # latency
*
*
* Type ^C to stop this application.
*
*
== Sampling period: 100 us
== Test mode: periodic user-mode task
== All results in microseconds
warming up...
RTT| 00:00:01 (periodic user-mode task, 100 us period, priority 99)
RTH|-----lat min|-----lat avg|-----lat max|-overrun|----lat best|---lat worst
RTD| -16.738| -16.613| -14.489| 0| -16.738| -14.489
RTD| -16.726| -16.602| -9.150| 0| -16.738| -9.150
RTD| -16.738| -16.587| -10.463| 0| -16.738| -9.150
RTD| -16.731| -16.602| -11.780| 0| -16.738| -9.150
RTD| -16.731| -16.605| -13.943| 0| -16.738| -9.150
RTD| -16.733| -16.586| -10.669| 0| -16.738| -9.150
RTD| -16.732| -16.604| -13.736| 0| -16.738| -9.150
RTD| -16.740| -16.603| -10.243| 0| -16.740| -9.150
RTD| -16.732| -16.585| -10.725| 0| -16.740| -9.150
RTD| -16.727| -16.601| -13.796| 0| -16.740| -9.150
RTD| -16.726| -16.603| -13.741| 0| -16.740| -9.150
> It works for me,
> but exposes milliseconds of latencies. Same setup with LAPIC enabled is
> fine and obviously stable. Before digging into this (time is short
> anyway), I would like to exclude problems of my notebook hardware.
I cannot run it with lapic because the system hung.
Regards,
Leo
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