heap memory usage in L4 drops/oskit task

Bert van Leeuwen bert.vanleeuwen at gmail.com
Tue Jul 26 15:43:41 CEST 2005

Thanks, that seems to give a likely sounding figure. Just to be sure,
all new/delete/malloc/free in my program will contribute to that
figure, right? I'm getting what I thought was a mem leak, since after
a time calling new throws an exception, but it still seems to happen
and the mem figure doesn't indicate a mem leak taking place... Is
there any other reason that new would throw an exception? Perhaps heap
fragmentation or something like that?

On 7/26/05, Christian Helmuth <ch12 at os.inf.tu-dresden.de> wrote:
> Hi,
> On Tue, Jul 26, 2005 at 11:11:03AM +0200, Bert van Leeuwen wrote:
> > How can I check how much heap space is left (or used) in my
> > drops/oskit program? Normally (in linux/gnu) I would use getrusage,
> > which also returns a number of other useful statistics, but this
> > function doesn't seem to exist in drops/oskit...
> In "MODE = l4env" you could use one of:
>   #include <oskit/lmm.h>
>   extern lmm_t malloc_lmm;
>   unsigned int free_memory = lmm_avail(&malloc_lmm, 0);
>   lmm_dump(&malloc_lmm);
>   lmm_stats(&malloc_lmm);
> --
> Christian Helmuth
> TU Dresden, Dept. of CS
> Operating Systems Group
> http://os.inf.tu-dresden.de/~ch12
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