add balanced stride workload.
add balanced stride workload.

This workload can make cache hits very low.

icoming/FlashX,silky/FlashGraph,zheng-da/FlashX,icoming/FlashX,icoming/FlashX,zheng-da/FlashX,flashxio/FlashX,flashxio/FlashX,flashxio/FlashX,flashxio/FlashX,icoming/FlashGraph,zheng-da/FlashX,icoming/FlashX,silky/FlashGraph,icoming/FlashX,icoming/FlashGraph,flashxio/FlashX,zheng-da/FlashX,icoming/FlashGraph,flashxio/FlashX,silky/FlashGraph,zheng-da/FlashX,icoming/FlashGraph,icoming/FlashGraph,silky/FlashGraph,silky/FlashGraph