realtime-preempt-2.6.12-final-V0.7.51-11 glitches [2]

[Rui Nuno Capela]

> Hi all,
>
> These are one of my latest consolidated results while using (my)
> jack_test4.2 suite, against a couple of 2.6.12 kernels patched for
> PREEMPT_RT, on my P4@xxxxxx/UP laptop.
>
> See anything funny?
>
> As it seems, the kernel latency performance is in some unfortunate
> regression, and I'm experiencing this unsatisfactory behavior ever since
> the latest RT-V0.7.50-xx patch series.
>
>   ------------------------------ ------------- -------------
>                                  RT-V0.7.51-11 RT-V0.7.49-01
>   ------------------------------ ------------- -------------
>   Total seconds ran . . . . . . :      900           900
>   Number of clients . . . . . . :       14            14
>   Ports per client  . . . . . . :        4             4
>   Frames per buffer . . . . . . :       64            64
>   Number of runs  . . . . . . . :        1             1
>   ------------------------------ ------------- -------------
>   Failure Rate  . . . . . . . . :   (    0.0 )    (    0.0)  /hour
>   XRUN Rate . . . . . . . . . . :      373.3           0.0   /hour
>   Delay Rate (>spare time)  . . :      220.0           0.0   /hour
>   Delay Rate (>1000 usecs)  . . :        0.0           0.0   /hour
>   Delay Maximum . . . . . . . . :     7853           295     usecs
>   Cycle Maximum . . . . . . . . :      852           943     usecs
>   Average DSP Load. . . . . . . :       41.8          44.4   %
>   Average CPU System Load . . . :        6.8          16.3   %
>   Average CPU User Load . . . . :       28.8          30.1   %
>   Average CPU Nice Load . . . . :        0.0           0.0   %
>   Average CPU I/O Wait Load . . :        0.0           0.1   %
>   Average CPU IRQ Load  . . . . :        0.0           0.0   %
>   Average CPU Soft-IRQ Load . . :        0.0           0.0   %
>   Average Interrupt Rate  . . . :     1679.3        1680.4   /sec
>   Average Context-Switch Rate . :    12508.6       14463.2   /sec
>   ------------------------------ ------------- -------------
>
> JFYI respective kernel configs are also attached.
>

Sorry, my last post failed on packing those configs away. Here it goes
again, hopefully.

Cheers.
-- 
rncbc aka Rui Nuno Capela
rncbc@xxxxxxxxx

Attachment: config-2.6.12-RT-V0.7.49-01.0.gz
Description: application/gzip-compressed

Attachment: config-2.6.12-RT-V0.7.51-11.0.gz
Description: application/gzip-compressed