Re: [Xenomai-help] adeos patch 2.6.28.9-x86-2.2-07 feedback

[Philippe Gerum <rpm@xenomai.org>]

On Thu, 2009-04-23 at 11:20 +0200, vikesh rambaran wrote:
> Hi
> 
> Thanx for the updated patch. Some feedback ...
> 
> I tested it with Xenomai 2.4.7 under Ubuntu 8.04.2  on three different
> platforms 
> (AMD Athlon Desktop, Intel Core 2 Desktop, Intel Core Duo Laptop)
> 
> Typical system lockups when in the gnome desktop do NOT occur
> anymore ! Great :)
> 
> Initial observations when compared to Xenomai 2.4.5 with
> adeos-ipipe-2.6.24-x86-2.0-07.patch.  :
> 
> 1. Latency test shows a slight increase of about 5 to 10 % on the
> Intel platforms. 
> (Still need to do the comparison on the AMD platform). This translates
> to less than 5 uS 
> so it's ok for our case.
> 
> 2. On the Intel Core 2 Desktop, our application has a much more
> significant max scheduling jitter
> of about 125 uS (compared with < 60uS for Xenomia 2.4.5). This
> 'increased jitter' does not
> show up on the other two platforms. Still trying to trace this one.

Time for an I-pipe tracer log, with latency -f. I guess this
pathological jitter should trigger with standard tests as well; if it
does not, well, there might be other regression spots in the APIs.

.config would help as well. TIA,

>  Already played around with 
> different ACPI and SMI settings, but no joy (:
> 
> 
> Keep well
> Vicki
> 
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-- 
Philippe.