print number of accesses in workload stat.
print number of accesses in workload stat.

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