CMEM Error: free: failed to free 0x40912000

PatrickRadizi

I'm writing a Gstreamer based application for DM6443.

When I try to free the contigous memory buffers allocated at startup I get the following error message

CMEM Error: free: failed to free 0x40912000.

I used BufTab_create() to allocate the buffers and BufTab_delete() to free them. I get one error message for each buffer (I only call BufTab_delete() once)

My application (video decoder)is running fine to begin with, so the allocation of the buffers has obviously succeeded, it's when I try to shut things down it goes wrong.

I'm using Linux 2.6.27. Not sure which version cmem is, but it's the one distributed with DVSDK 2.00.00.15

Any ideas what could be wrong ?

over 16 years ago

0 Juan Gonzales over 16 years ago

TI__Mastermind 37340 points

Normally when we see Memory_free() fail its because of a corrupted. Note that you can use 'cat /proc/cmem' to see which buffers are allocated where.

Also, where did you get the dvsdk 2.00.00.15 you are referring to above? I do not recognize the version number which leads me to believe this may be one of our beta kernels specific to the DM365 platforms.

0 Bernie Thompson TI over 16 years ago

TI__Mastermind 41665 points

Juan is right that this is early adopter software, though it is still applicable to the DM6443 (the DM365 only releases are DVSDK 2.10.xx.xx). The current version is 2.00.00.18 and can be found here, it may be worth trying this out instead in the case that one of the bug fixes between 15 and 18 is causing the issue though this is a bit of a long shot as even the 18 release is considered early adopter and is still being developed.

0 PatrickRadizi over 16 years ago in reply to Juan Gonzales

Prodigy 40 points

I found the problem.

FIrst i saw

CMEMK Error: FREE: Not a registered user of physical buffer 0x87c1c000

in /var/log/messages

then I read the following document, http://wiki.davincidsp.com/index.php/CMEM_Overview, where it says that the memory must be allocated and freed by the same thread. This is not the case in my application, neither will it be easy to accomplish since Gstreamer uses a lot of threads.

The document mentions that this will be fixed in CMEM version 2.24.01. Is this version available yet?

Ps, the DVSDK I mentioned above was given to me directly by TI

0 Gunjan over 16 years ago in reply to PatrickRadizi

TI__Expert 7415 points

Patrik,

The LinuxUtils 2.24.01 (also includes CMEM) release is available internally but hasn't been made available externally. It should be, in about a week's time.

Thanks,
Gunjan.