liquid-dsp lagging performance than gnuradio

[Mas313]

Hi,
In the gmskframesync example, when k=208, m=4 , BT=0.4 and sampling rate of 2 Msps used the gmskframesync_create_set() function does not invoke call back instead application crashes with core dumped.
I have used same values with GNUradio GMSK modulator for AIS , where data rate of 9600 bps is used as described in the following project https://github.com/Mictronics/ais-simulator
What i have found that number of samples are quite high with 2 Msps but then how gnuradio managing it and sending it through SDR. Same is received correctly at the other end through other machine running gnuradio with same parameteres and SDR.
Any ideas or configuration missing

Thanks