[Matrix]: write SpMM result to disks in the test.
[Matrix]: write SpMM result to disks in the test.

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