Intel I/OAT is actually a set of technologies that each contributes to increased performance.
The features of Intel I/OAT enhance data acceleration across the computing platform.
- Intel® QuickData Technology enables data copy by the chipset instead of the CPU, to move data more efficiently through the server and provide fast, scalable, and reliable throughput.
- Direct Cache Access (DCA) allows a capable I/O device, such as a network controller, to place data directly into CPU cache, reducing cache misses and improving application response times.
- Extended Message Signaled Interrupts (MSI-X) distributes I/O interrupts to multiple CPUs and cores, for higher efficiency, better CPU utilization, and higher application performance.
- Receive Side Coalescing (RSC) aggregates packets from the same TCP/IP flow into one larger packet, reducing per-packet processing costs for faster TCP/IP processing.
- Low latency interrupts tune interrupt interval times depending on the latency sensitivity of the data, using criteria such as port number or packet size, for higher processing efficiency.
Intel® DSA replaces the Intel® QuickData Technology.
- White Paper
- Intel® I/O Acceleration Technology
- Reexamining Direct Cache Access to Optimize I/O Intensive Applications for Multi hundred-gigabit Networks
- Using Intel IOAT DMA
- Accelerating Network Receive Processing
- Efficient Asynchronous Memory Copy Operations on Multi-Core Systems and I/OAT