Realtime provides a deterministic response to actions
in the operating system. That means that the same action will take
the exact same amount of time every time, which is important in
mission-critical operations such as high-speed trading, medical and
military use cases.
The Linux 3.0 kernel was first released in July 2011. Red Hat's
policy on its flagship Red Hat Enterprise Linux (RHEL) is to not
rebase the kernel inside of an enterprise release cycle, to
maintain application and hardware certification. With MRG, Che
noted that Red Hat is not changing any of the APIs when the
platform gets a new kernel.
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