I also observed psa_connect() call time is now ~6000 cycles (previously ~3400 cycles in TF-M v1.1).

Regards,
Brian

From: Quach, Brian via TF-M <tf-m@lists.trustedfirmware.org>
Sent: Wednesday, April 26, 2023 12:56 PM
To: tf-m@lists.trustedfirmware.org
Subject: [EXTERNAL] [TF-M] psa_call performance

Hi,

Using isolation level 1 and IPC secure partition, I noticed psa_call() overhead for TFM v1.7 is significantly worse for than v1.1.   Is this expected?

Assuming 1 invec and 0 outvec for the PSA call….

TF-M version	Psa_call() round trip cycles
v1.1	4038
v1.7	6051

Regards,

Brian Quach

SimpleLink MCU

Texas Instruments Inc.