RTOS/OMAP-L138: How does DSP thread switch, and what principle it depend on in TI-RTOS?

Part Number:OMAP-L138

Tool/software:TI-RTOS

Hi,

I created two threads in DSP and MessageQ in ARM which printed info from just one thread. I found that it allways run only one thread with no switch. 

How can I figure out this?

Software: TI-RTOS-4.1, xdctools_3_32_01_22_core

thank you,

Luxiye