Hi Martijn, thanks for the hint.
I did manage to test your hunch, it does look like you are right:
setting 'ulimit -s 1024' I now get allocations of about 1M.
The threads seem to correspond to the i/o devices that are detected at
app launch.
Thanks again, cheers
Miguel
On 12/21/2010 09:47 AM, Martijn Wijns wrote:
Hi Miguel,
The 8mb blocks are most likely thread stacks. I was wondering about the
same thing yesterday. You can try to lower the thread stack space or try
to lower the number of running threads. Depending on whether overcommit
is enabled the actual memory usage will be lower, though.
Best regards,
Martijn Wijns
On 21-12-2010 13:36, miguel sofer wrote:
I am doing firsts tests with DFB, and am a bit worried about memory
consumption. I am pretty sure this is PEBKAC, and would appreciate a
couple of hints as to how to do things better.
I am doing my first explorations on a netbook running Ubuntu Lucid
Lynx. I am using directfb from the repositories.
Running pmap on the tutorial at
http://directfb.org/docs/DirectFB_Tutorials/simple.html
I see
...
00ed6000 80K r-x-- /usr/lib/libdirect-1.2.so.0.8.0
00eea000 4K r---- /usr/lib/libdirect-1.2.so.0.8.0
00eeb000 4K rw--- /usr/lib/libdirect-1.2.so.0.8.0
08048000 4K r-x-- /tmp/a.out
08049000 4K r---- /tmp/a.out
0804a000 4K rw--- /tmp/a.out
09a01000 132K rw--- [ anon ]
b0670000 4K ----- [ anon ]
b0671000 8192K rw--- [ anon ]
b0e71000 4K ----- [ anon ]
b0e72000 8192K rw--- [ anon ]
b1672000 4K ----- [ anon ]
b1673000 8192K rw--- [ anon ]
b1e73000 4K ----- [ anon ]
b1e74000 8192K rw--- [ anon ]
b6e7d000 2400K rw-s- /dev/fb0
b70d5000 4K ----- [ anon ]
b70d6000 8204K rw--- [ anon ]
b78ec000 8K rw--- [ anon ]
bfca3000 84K rw--- [ stack ]
total 46184K
My question is: what are all those 8 mb blocks of r/w memory? Is it
possible to configure DFB to not use so much RAM?
We will eventually be targetting a memory constrained device, so that
40+ mb for an essentially empty app means that DFB will likely not be
usable.
Thanks
Miguel
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