rtdx bandwith - found on ti faq

Problem:
What bandwidth rates can standard JTAG RTDX achieve?

Solution:
The maximum bandwidth possible for standard JTAG RTDX varies greatly based on several different factors. The primary factors include:
----The RTDX implementation method used for the target processor: this varies from a relatively inefficient polled interface (used in the C54x), to one that is interrupt-driven (used on the C6201). Data rates range between approximately 8 and 11 KB/second for the C54x. In a polling implementation these rates are affected by what the CPU is doing, since maximum rates are only accomplished if the CPU polls the status as soon as the channel becomes available. For the C6000 rates have been achieved of up to 20-50 KB/second.
----The silicon emulation capabilities available on that target processor: this varies from polling mechanisms to DMA to other implementations.