Subject: RE: SDL-News: question
From: Kjeld Christensen (DXD) (Kjeld.F.Christensen#dxd.ericsson.se)
Date: Wed Oct 13 1999 - 08:11:00 GMT
The originator of this message is responsible for its content.
-----From "Kjeld Christensen (DXD)" <Kjeld.F.Christensen#dxd.ericsson.se> to sdlnews -----
Interesting subject You are working with.
I am in the process of integrating an SDT ligth integrated kernel against our platform. While doing this I had some experiences regarding efficiency.
I found that context switch between the SDT kernel, and my OS is very expensive. A real serious issue here is the clock system. The SDT kernel will require to check the time at least once per transition.
This also means that communicating between processes in the SDL system is faster than communicating between two processes outside the system! (The light kernel is implemented as one OS process, thus we have no context switch)
I also experimented with using different optimizer levels while compiling both the system, and the Kernel. But I was not able to detect any difference!
--------------------------- With Regards ------------------------
Kjeld Flarup (Christensen) Ericsson Diax A/S
Faelledvej 17, DK-7600 Struer, Phone +45 97 86 94 10, Fax +45 97 85 44 22
-----------------------------------| A small but great part of Ericsson |
> -----Original Message-----
> From: haihai#263.net [mailto:haihai#263.net]
> Sent: 13. oktober 1999 13:15
> To: sdlnews#sdl-forum.org
> Subject: SDL-news: question
> The originator of this message is responsible for its content.
> -----From haihai#263.net to sdlnews -----
> Hi,SDL experts.I have some questions to ask you.
> I want to promote the efficiency of the C code generated by SDT,
> so I want to do some optimization work on SDT.what should I do?
> Can I do some work on SDL source diagram level or code
> generation phase
> or integration with OS phase?
> If you know ,would you please tell me ,thank you!
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> -----End text from haihai#263.net to sdlnews -----
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-----End text from "Kjeld Christensen (DXD)" <Kjeld.F.Christensen#dxd.ericsson.se> to sdlnews -----
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