[Matrix]: don't check if #threads is 2^i.
[Matrix]: don't check if #threads is 2^i.

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