ARM DSP Communication Performance Problem

Aquiles Lacruz

Other Parts Discussed in Thread: OMAP-L137

Hello,

I'm making an application that needs to read, and process data on the DSP and send it every 16usec to the GPP. On the max performance needed I need to transmit 4 messages of 4KB each from the DSP to the GPP as well as another message that is of about 1KB on another queue. On this test it fails as the GPP can't get the data and store it fast enough (it works with 2 messages of 4KB). I was using queues for the communication, but I was wondering if maybe using RingIOs would get me a faster reading time on the GPP, or maybe it could improve the performance.

I would appreciate any thoughts on this, for I'm thinking about testing the Ring, but I have to make several modifications, speaking of which, should I make separate POOL for the queues and the Rings?

Thanks in advance for any help,

~ Aquiles Lacruz

over 13 years ago

0 dabuan over 13 years ago

TI__Genius 14545 points

Aquiles,

OMAP-L137 has 256 KB of Shared RAM accessible by both the DSP and the ARM (GPP). If you use this shared RAM, you can simply pass the pointers between the DSP and GPP to read from the same memory locations. This way you don't have to worry about transferring data.

0 dabuan over 13 years ago in reply to dabuan

TI__Genius 14545 points

Sorry 128 KB - not 256

0 Aquiles Lacruz over 13 years ago in reply to dabuan

Intellectual 385 points

Hi Drew!

I already did something of the sort using the PROC_read and PROC_write routines. It helped me achieve the amount of data I needed to exchange between the processors.

Thanks,

~ Aquiles

Processors

Processors forum

ARM DSP Communication Performance Problem