RTOS/AM5728: IPC example Heap Memory question

sureshbabu mck

Part Number: AM5728

Tool/software: TI-RTOS

Hello

I am using Big Data IPC example code as a reference to implement our own IPC Interfaces. There is a module called HeapMem from Linux side, which is similar to HeapMemMP module. My question is

Can use HeapMemMP_open call on DSP side for the heap memory created by call HeapMem_create on Linux side? Example doesn't allocate heap memory on DSP side, it only uses the same memory allocated and shared by ARM linux side, modifies content and sends it back. But we have allocation requirement. The same applies to Free to, we have to free the allocated ARM/linux memory from DSP side.

To summarize, whether HeapMem on ARM/Linux side is compatible with HeapMemMP DSP/BIOS calls?

Regards,

Suresh

over 8 years ago

0 Biser Gatchev-XID over 8 years ago

TI__Guru**** 393215 points

The software team have been notified. They will respond here.

0 Rex Chang over 8 years ago in reply to Biser Gatchev-XID

TI__Guru 50170 points

Hi, Sureshbabu,

No, it is not compatible with HeapMemMP. Unlike HeapMemMP which can be shared among DSPs, HeapMem does not cross ARM/DSP boundary. DSP can't free it, but need to notify ARM and let ARM free it.

Rex

0 sureshbabu mck over 8 years ago in reply to Rex Chang

Prodigy 110 points

Hi Rex,
Thanks a lot for quick update. It really helped me in avoiding doing wrong implementation and testing.
Regards,
Suresh Babu

0 sureshbabu mck over 8 years ago in reply to Rex Chang

Prodigy 110 points

Hi Rex,
Both Shared region (SharedRegion (BIOS)) and heap memory (HeapMemMP (BIOS)) can be only used in BIOS environment. I hope it won't be efficient to request memory allocation to ARM/Linux for DSP/BIOS by posting another message (house keeping).
Is there any other better example I can explore for my below requirement:
ARM/Linux
DSP/BIOS
Size of data - 2048 bytes (Max)

Message Que is configured for 512 bytes with HeapBuf. Can I change this configuration to (2048 + header of 32 bytes) and use? Is there any limitation in transport (ti.sdo.ipc.interfaces.IMessageQTransport ) for SIZE?
Regards,
Suresh

0 Rex Chang over 8 years ago in reply to sureshbabu mck

TI__Guru 50170 points

Hi, Suresh,

We don't have example that memory allocated by Linux but released by DSP if that's what you are asking.

For MessageQ size, please refer to the discussion in this e2e thread, e2e.ti.com/.../2050679

Rex

Processors

Processors forum

RTOS/AM5728: IPC example Heap Memory question