SCIF. SCIF provides a mechanism for inter-node communication within a single platform, where a node is an Intel® MIC Architecture based PCIe card or an.

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SCIF

SCIF provides a mechanism for inter-node communication within a single platform, where a node is an Intel® MIC Architecture based PCIe card or an Intel® Xeon® processor-based host processor complex. The SCIF driver provides a reliable connection- based messaging layer, as well as functionality which abstracts RMA operations.

Connection-based Messaging Layer(similar to TCP) scif_epd_t scif_open(void); int scif_bind(scif_epd_t epd, uint16_t pn); int scif_listen(scif_epd_t epd, int backlog); int scif_connect(scif_epd_t epd, struct scif_portID* dst); int scif_accept (scif_epd_t epd, struct scif_portID* peer, scif_epd_t* newepd, int flags); int scif_close (scif_epd_t epd);

SCIF Manual P.12

Memory Registration Designed for RMA Mechanism by which a process exposes ranges of its address space for controlled access by a process on a remote node. Memory must be registered before it can be mapped to the address space of another process or be the source or target of an RMA transfer.

Memory Registration Each connected endpoint has a registered address space off_t scif_register(scif_epd_t epd, void* addr, size_t len, off_t offset, int prot_flags, int map_flags); int scif_unregister(scif_epd_t epd, off_t offset, size_t len);

Memory Registration-mmap Like system call mmap map a fd to virtual address space void* scif_mmap(void* addr, size_t len, int prot_flags, int map_flags, scif_epd_t epd, off_t offset); int scif_munmap (void* addr, size_t len);

Memory Registration-RMA int scif_readfrom(scif_epd_t epd, off_t loffset, size_t len, off_t roffset, int rma_flags); int scif_writeto(scif_epd_t epd, off_t loffset, size_t len, off_t roffset, int rma_flags); int scif_vreadfrom(scif_epd_t epd, void* addr, size_t len, off_t offset, int rma_flags); int scif_vwriteto(scif_epd_t epd, void* addr, size_t len, off_t offset, int rma_flags);

RMA Synchronization int scif_fence_mark(scif_epd_t epd, int flags, int* mark); int scif_fence_wait(scif_epd_t epd, int mark); int scif_fence_signal(scif_epd_t epd, off_t loff, uint64_t lval, off_t roff, uint64_t rval, int flags);