When Poll Is Better than Interrupt | USENIX

Jisoo Yang, Dave B. Minturn, and Frank Hady, Intel Corporation In a traditional block I/O path, the operating system completes virtually all I/Os asynchronously via interrupts. However, performing storage I/O with ultra-low latency devices using next-generation non-volatile memory, it can be shown that polling for the completion — hence wasting clock cycles during the I/O — delivers higher perform