S32E2 IPCF latency timings between M33 and R52

[PrabhanjanKopp]

I am working with S32E2 and configuring the IPCF framework and here is my setup

• Device: S32E288
• IPCF transport: Shared Memory + MRU notification
• Communication: M33 ↔ R52
• IPCF channel type: Managed channel
• 1 IPCF channel configured
• Interrupt mode (not polling)
• Ping/Pong RTT test implemented

Communication is functioning correctly in both directions.

I use STM to measure the timing ticks between the 2 cores.

Measurement flow:

R52:

timestamp

send PING

M33:

receive PING

immediately send PONG from RX callback

R52:

receive PONG

compute RTT

The values computed for a STM running on 24Mhz are close to 200us RTT(Round trip time). My transport overhead is about 30us but the transfer itself takes up bulk of the time. I have tried various things like increasing MRU IRQ notification but has not improved the timings. Having optimisation in code from -o0 to -o1 helped but -o2 didnt make any difference. The payload itself is 16 bytes.

Questions:
1. what is expected IPCF latency for managed /unmanaged channels.

2. can we acheive a low double digit latency?

If you need any more details, please reply back.