/* let throttle the communication for taskD if its parent is SD_DONE */
/* the bandwidth is 1.25e8, the data size is 1e7, and we want to throttle
* the bandwidth by a factor 2. the rate is then 1.25e8/(2*1e7)=6.25
/* let throttle the communication for taskD if its parent is SD_DONE */
/* the bandwidth is 1.25e8, the data size is 1e7, and we want to throttle
* the bandwidth by a factor 2. the rate is then 1.25e8/(2*1e7)=6.25