GNURadio app overflow with hackrf

[Thabet GHARBI]

Hello,

I'm running a GNURadio app on my laptop with HackRF.

My sampling rate is 13.5MHz.

I have permanently overflow.

How can I check if it's due to:

- ADC overflow of HackRF hardware ?

- My laptop which is maybe not powerful enough ? (VirtualMachine: Ubuntu 18.04, 2 cores allocated i7 @3GHz, 4GB RAM allocated)

- GNURadio framework limitation?

Best Regards,