Re: [Pnet-developers] re: [DotGNU] Memory usage on an embedded system

[Simon Posnjak]

V sre, 20.10.2004 ob 16:19 je Gopal V napisal(a):
> Hi,
> 
> I've fixed the build issues with the kernel-fp pnetlib
> builds , so that the latest CVS builds with a minimal
> but usable build.
> 
> See http://t3.dotgnu.info/code/mem.png for a memory
> profile of ilrun in kernel-fp *without* a GC for 
> evenodd.exe from pnet/samples .
> 
> I had to make a few changes to the thin-locks to make
> it work. I move the GetObjectLockWordPtr out of the 
> locked code to prevent a dead lock. (tum: is that
> correct ?).
> 
> A stripped ilrun is now 451k and gzip compresses
> that to around 200k (should fit on flash nicely).
> Now I am going to proceed porting pnet to uClibc to
> see if it goes any lower :)

Hm, the problem is not the size of the ilrun, but the memory 
it takes while running. When I run full blown ilrun with hello.exe
example i get this reading (doing ps axu evry 0.8 s):

13723         root       4616   R   ./ilrun -L /var/libs/ hello.exe
13723         root       4728   R   ./ilrun -L /var/libs/ hello.exe
13723         root       5064   R   ./ilrun -L /var/libs/ hello.exe
13723         root       5304   R   ./ilrun -L /var/libs/ hello.exe
13723         root       5600   R   ./ilrun -L /var/libs/ hello.exe
13723         root       5904   R   ./ilrun -L /var/libs/ hello.exe
13723         root       6264   R   ./ilrun -L /var/libs/ hello.exe
13723         root       6456   R   ./ilrun -L /var/libs/ hello.exe

And when I use the kernel-fp I get:

25140         root       4296   R   ./ilrun -L /var/libs/ hello.exe
25140         root       4408   R   ./ilrun -L /var/libs/ hello.exe
25140         root       4720   R   ./ilrun -L /var/libs/ hello.exe
25140         root       4984   R   ./ilrun -L /var/libs/ hello.exe
25140         root       5304   R   ./ilrun -L /var/libs/ hello.exe
25140         root       5656   R   ./ilrun -L /var/libs/ hello.exe
25140         root       5984   R   ./ilrun -L /var/libs/ hello.exe
25140         root       5384   R   ./ilrun -L /var/libs/ hello.exe

1 MB better but still way to much, for such a simple example. It looks
to me as the whole library is always loaded. Is there a way to *force*
the loading of only the needed tokens.

                Regard Simon