Method get_free_mem

src/core/include/megbrain/comp_node.h:636–636

        virtual size_t get_max_used_memory() { return 0; }
        virtual size_t get_max_block_size_available() { return 0; }
        virtual size_t get_free_mem() { return get_mem_status_bytes().second; }
        virtual void reset_max_reserved_memory() {}
        virtual void reset_max_used_memory() {}
#endif