RE: [ECOS] Suitability of eCos

["Pamulapati, Indrasena (CTS)" <pindrase at chn dot cognizant dot com>]

	Hi,
	What u say is right. As we decrease the tick duration the efficiency
of the OS comes down because of the overhead involved in processing the
tick. 
	But my application requires tick duration as low as a
100microseconds. I need to address such low time resolutions.

	And yes, the choice of eCos for most of us will be because it is
opensource.
	But dont we need to consider the suitability of a particular OS for
the application we are building for maximum efficiency?
	I feel there should be some parameters of rtos's that have to be
considered with reference to the application we are building before deciding
the OS. 

> -----Original Message-----
> From: Ramana [mailto:ramanabv@danlawinc.com] 
> Sent: Tuesday, January 16, 2001 2:52 PM
> To: ecos-discuss@sources.redhat.com
> Subject: RE: [ECOS] Suitability of eCos
> 
> 
> Hi,
> 
> We are using ecos for some time now. It works quite well.
> 
> a. in general the OS tick should be about 10 ms or so and should nto be
> very fast. We did have a requirement to increase this to 1 ms. However I
> think this si about the maximum it can go.We are using 40 Mhz Power pc.
> I dotn know why any one need a very fast OS tick. The OS tick is
> basically for resolution of time and scheduling only.
> 
> b. For us the decision for ecos was quite simple. We needed open source
> platform that we can change. And the cost was also a factor.
> rgds
> ramana
> 
> 
> -----Original Message-----
> From: Pamulapati, Indrasena (CTS) [mailto:pindrase@chn.cognizant.com]
> Sent: Tuesday, January 16, 2001 2:40 PM
> To: ecos-discuss@sources.redhat.com
> Subject: [ECOS] Suitability of eCos
> 
> 
> Hello,
> 
> I am building an application that has to handle very high data rates in
> the
> range of a couple of tens of Million bits/sec and handle data frames of
> durations as low as a millisecond.
> This will require me to have OS clock as high as 10000 ticks/sec. The
> whole
> thing is going to run in an embedded system with a real time operating
> system.
> The problem I am facing is,
> 
> 1. How do I decide which real time operating system I have to choose. 
> 
> 2. I want to know the kind of applications for which eCos is most
> suitable
> for.
>     As most of u are building appications for various real time systems
> there would have been some features of eCos that made it
> particularly suitable for ur applications. Can u guys explain what
> prompted
> u to choose eCos as the rtos for ur applications.
> 
> Can u direct me to some resourses on the net that will help me in
> deciding
> the rtos that will be most suitable for applications of my kind.
> 
> bye,
> Indrasena
> 
> 	
> 
> 
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