AM2432: WARNING: RPMessage_send:265: [IPC RPMSG] Message send to remote core 1 @ 7 end point failed due to lack of space in vring !!!

Teja Poorna

Part Number: AM2432

Hello TI,

I am using the IPC communication between the R5 and M4 core in the AM2432 SoC.

In between the messages, I receive the following warning

WARNING: RPMessage_send:265: [IPC RPMSG] Message send to remote core 1 @ 7 end point failed due to lack of space in vring !!!

Here is the scenario:

RP Message No of buffers = 8

RP Message Buffer size(Bytes) = 128

R5 linker -> Shared memory segment IPC_VRING_MEM: ORIGIN = 0x701D8000, LENGTH = 0x0000C000

M4 linker-> Shared memory segment IPC_VRING_MEM: ORIGIN = 0x701D8000, LENGTH = 0x0000C000

If any solutions, please let me know.

Thanks & Regards

Teja

over 2 years ago

0 Kowshik Gudimetla over 2 years ago

TI__Genius 15435 points

Hi Teja,

How fast are you trying to send the messages? The warning basically comes up when there are multiple concurrent messages coming in a tight loop and the SW is not able to process all those fast the queues gets filled up and the incoming messages are simply discarded with this warning.

Can I know what is the timeout you are passing during rpmsg_send?

Thanks

0 Teja Poorna over 2 years ago in reply to Kowshik Gudimetla

Prodigy 115 points

Hi Kowshik,

The timeout is set to 20000 ticks on both IPC send and receive cores.

Thanks

teja

0 Kowshik Gudimetla over 2 years ago in reply to Teja Poorna

TI__Genius 15435 points

Hi,

Can you change it to SystemP_Forever as passed in the rpmsg examples and try again please?

Thanks

0 Teja Poorna over 2 years ago in reply to Kowshik Gudimetla

Prodigy 115 points

Hi,

Yes, I changed the timeout to SystemP_Wait_Forever as you mentioned. But still no success.

Thanks

0 Kowshik Gudimetla over 2 years ago in reply to Teja Poorna

TI__Genius 15435 points

Hi Teja,

In that case the only final thought I get in my mind is to increase the number of buffers to more than 8 and try. This will create more space for the incoming messages and the software shouldn't throw this warning.

Thanks

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AM2432: WARNING: RPMessage_send:265: [IPC RPMSG] Message send to remote core 1 @ 7 end point failed due to lack of space in vring !!!