low latency kernel resources

Processor and thread affinity
http://www.kernel.org/doc/man-pages/online/pages/man2/sched_setaffinity.2.html
http://www.kernel.org/doc/man-pages/online/pages/man3/pthread_attr_setaffinity_np.3.html

Scheduler priority and RT scheduling
http://www.kernel.org/doc/man-pages/online/pages/man2/sched_setscheduler.2.html
http://www.kernel.org/doc/man-pages/online/pages/man2/sched_get_priority_max.2.html
http://www.kernel.org/doc/man-pages/online/pages/man2/getrlimit.2.html

Memory page locking
http://www.kernel.org/doc/man-pages/online/pages/man2/mlock.2.html
http://www.kernel.org/doc/man-pages/online/pages/man7/cpuset.7.html

IRQ interrupt coalesscing and IRQ masking
http://www.kernel.org/doc/htmldocs/genericirq/

NUMA aware memory allocation resources
http://www.kernel.org/doc/man-pages/online/pages/man7/numa.7.html
http://www.kernel.org/doc/man-pages/online/pages/man2/set_mempolicy.2.html
http://linux.die.net/man/8/numactl
http://en.wikipedia.org/wiki/Non-Uniform_Memory_Access
http://www.kernel.org/doc/man-pages/online/pages/man7/cpuset.7.html