Recommended latency Tuning

Tuning Parameter	How?
MTU size to maximum supported by Network	Leave at default
interrupt moderation	disable: ethtool-C RX-usecs-IRQ 0
TCP/IP checksum offload	Leave at default
TCP segmentation offload	Leave at default
TCP large receive offload	disable using sysfs: Echo 0>/sys/class/NET/ethx/device/LRO
TCP protocol tuning	Leave at default, but changing does not impact latency.
receive side scaling	application dependent
interrupt affinity & irqbalance service	stop IRQ balance service: /sbin/service irqbalance stop interrupt affinity application dependent
Buffer Allocation Method	Leave at default
PCI Express Lane configuration	ensure current speed (not the supported speed) reads back as "X8 and 5 Gb/s" or "X8 and unknown"
CPU speed service (cpuspeed)	disable: /sbin/service cpuspeed stop
memory bandwidth	ensure memory utilizes all memory channels on system motherboard
intel quickdata (Intel chipsets only)	enable in bios and install driver: modprobe ioatdma