Do we have PB VALUE and PB REFERENCE in RFC'SN or BAPI'S

HI ABAPers,
greetings to all,
I HAVE A DOUBT REGARDING RFC'S concept.
Do  we have PASS BY VALUE and PASS BY REFERENCE (OR) CALL BY VALUE and CALL BY REFERENCE in RFC'S or BAPI'S.
IF SO HOW DO THEY WORK.
please provide information about this PBR and PBV.

Hi
The OID´s do return values which is good.
But I´ve not been able to verify that this is inline with the acutal CPU load as shown via the GUI (Administration-Diagnostics-CPU utilisation)
Someone (thread in support community) pointed out that these values are number of packets sent to the CPU rather than the load of CPU?
CPU utilization for 5 seconds
.1.3.6.1.4.1.9.6.1.101.1.7.0
CPU utilization for 1 minutes
.1.3.6.1.4.1.9.6.1.101.1.8.0
CPU utilization for 5 minutes
.1.3.6.1.4.1.9.6.1.101.1.9.0
Can someone challenge that or verify the correctness of that statement?
Thank you for you input here.

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