Hi, I have a doubt about the correct priority that tee-supplicant should have in the system.

In detail, we have 2 user-space applications (user-pkcs11-0, user-pkcs11-1) that use the same PKCS11 services from OPTEE-OS (access to RPDB partition for private key). For project reason we use the following nice priority values:

user-pkcs11-0, nice=-5 user-pkcs11-1, nice=-10 .... tee-supplcant, nice=0 ... a lot of other services with nice=0 ...

Unfortunately, in some strange case when CPU is overload (booting).... appear a strange problem in user-pkcs11-1: occasionally the time for the certificate's signature check explode to 400ms.

Due to the problem to replicate this defect, I have try to investigate in theory if could be verify a starvation/race-condition between tee-supplicant and user-pkcs11-1 or other-services. In this scenario, what is the correct priority value that tee-supplicant should have?

I suspect that we should change the priority of tee-supplcant = user-pkcs11-1 = -10 Is it make sense for you, or maybe better to search the problem from an other side :-) ?

Thanks in advance for your attention

BR Matteo Facchinetti