topic Re: S32E2 IPCF latency timings between M33 and R52 in S32Z/E

S32E2 IPCF latency timings between M33 and R52

PrabhanjanKopp — Fri, 11 Sep 2026 14:01:04 GMT

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.

Re: S32E2 IPCF latency timings between M33 and R52

Joey_z — Mon, 14 Sep 2026 02:57:37 GMT

Hi,PrabhanjanKopp

Thank you for contacting us.

For your testing scenario, you can try to refer to GreenVIP. The Loop Time is about 20-30us.(S32ZE_GreenVIP_1.x.1/doc/UG_S32ZE_GreenVIP.pdf)

If you have other issue, you can contact us at any time.

Joey

Re: S32E2 IPCF latency timings between M33 and R52

PrabhanjanKopp — Tue, 15 Sep 2026 04:53:02 GMT

Hi Joey,

Thank you for your reply. I am using S32 DS for setting up my cores and was wondering is GreenVIP is any different? Also , it will be most helpful to get the document link(or the doc itself) that you referring in your message. Is there a reference project that I can compare my settings against? I suspect there might be some configuration mismatch.

Thanks,

Prabhanjan

Re: S32E2 IPCF latency timings between M33 and R52

Joey_z — Tue, 15 Sep 2026 06:16:27 GMT

Hi,Prabhanjan

Thank you for your reply.

The link of GreenVIP download as the following:

S32E2 Safe and Secure High-Performance Real-Time Processors with Actuation Support | NXP Semiconductors

Automotive Software Package Manager | NXP Semiconductors

The EB tresos IDE is used for the GreenVIP, both S32DS and EB tresos can be used to develop applications for S32E. Hope this information can help you; you can contact us at any time if you still have question about this.

Joey

Re: S32E2 IPCF latency timings between M33 and R52

PrabhanjanKopp — Sat, 19 Sep 2026 14:14:44 GMT

Thank you for that. I found that I can get the timings down when I switch to unmanaged channel. It is close to 60us . Will see if I can get it further down.

Re: S32E2 IPCF latency timings between M33 and R52

Joey_z — Mon, 21 Sep 2026 02:00:42 GMT

Hi,PrabhanjanKopp

Thank you for your reply and information.

For the 60us result, was it tested by your customer program or by our Greenvip?

Joey