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.