about SDIO wifi SDIO Layer Perf evaluate

Hi,list,i was reading forlin patch in linaro about mmc sdio function single irq,i am in a SDIO wifi project,i want to evaluate SDIO wifi throught in sdio layer,if Customer guess SDIO speed isnt ok ,they can use my programm to test and evaluate,such as RX only,TX only,ECHO(Host Send data-SDIO Function Side Sdio controller back data -Host Receive) or others,my idea use a module to test. but thread lantency can not guarantee,hope list give me idea,i should use tasklet or some good way or idea to test.

B.R Tommy