SPP_data_write performance in bluetopia stonestreet

Hi Stonestreet support,

It is not the first time I explain you my goals in my project:

I need to transmit over 25 packets per second , and each packet size is over 1024 bytes.

I'm working at 25MHZ with  microcontroller MSP430F5438A .

I configured the HCI baudrate at 460800 bps.

The problem is sometime I have buffer overruns in my circular buffer because "SPP_Data_Write" function seems to take time.

1) Do you have some testbenches over this function ? Can you tell me how many time it take to perform this operation. Is this function is blocking ( I don't think ) ?

2) Can you help/advise me to calculate the SPP buffer (I configured the buffers at 300 bytes), parameters, and all sort of configuration functions.

3) Do you know exactly what is the effective size I send to HCI controller, when SPP buffer size is 300 bytes , 512 bytes and 1024 bytes.

Thanks

Mikael