[ECOS] ecos == slow ??

[Gary Thomas]

On Wed, 2002-03-27 at 01:54, wangwei wrote:
> 
> I have same opinion as you.
> Last year , I had try the nanox  based in ecos on a  arm7500 board , at 56M hz frequency.
> But I 'm very dessapointted for the result.It's too slow.
> It's even slower than the Xfree86  for  linux running in the same board.
>  

You can't possibly compare these!  XFree86 has been around for almost 10 years and is extremely 
optimized and tuned and gets very good performance on even the slowest/dumbest/simplest hardware.  
nanoX shares none of that heritage and its performance is often less than stellar.  The main 
advantage nanoX has over XFree86 is one of size, and the fact that it runs easily on a number 
of embedded systems, including eCos.  XFree86 requires Linux.

As for the original question about eCos' performance, I'd have to say that there is something else 
going on with the JVM environment that's contributing to the slowness.  It could even be something 
as simple as the device is trying to start up networking in a non-networked environment (or 
something related) and the eCos program is waiting (i.e. timing out) for DHCP to _not_ happen.  I 
think that Stijn and Tom need to do a little more investigating to find out what's going on.

> 
> ----- Original Message ----- 
> From: "Stijn Symons" <stijn.symons@acunia.com>
> To: "ecos-discuss" <ecos-discuss@sources.redhat.com>
> Sent: Tuesday, March 26, 2002 10:39 PM
> Subject: [ECOS] ecos == slow ??
> 
> 
> > Hi all,
> > 
> > Is eCos slow or our are we missing something here? Were porting a Java
> > Virtual Machine to eCos, but it's much slower than running it on
> > embedded linux in it's original code.  The VM starts in about 5 seconds
> > on Linux where the ecos port only starts after about 5 minutes (no joke,
> > we timed it).
> > 
> > We ported it by mapping al the primitives that the VM uses (mutexes,
> > threads, queue, the whole bunch) to ecos, so there aren't many layers in
> > it.
> > 
> > any comments? Our target is a Compaq IPAQ pocket pc.
> > 
> > kind regards,
> > 
> > Stijn and Tom
> > 
> > 
> > -- 
> > Before posting, please read the FAQ: http://sources.redhat.com/fom/ecos
> > and search the list archive: http://sources.redhat.com/ml/ecos-discuss
> > 
> > 



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