Automotive Linux Summit & Open Source Summit Japan 2018

The system call is the gateway to the kernel. The kernel provides services
to applications via system calls, like a library provides services via
library calls.

System call performance is important for many workloads, and especially
for bragging rights.

In this presentation, Nicholas will introduce system calls, explain how the
Power ISA system call instruction works, and how the Linux/powerpc code
work. Nicholas will then talk about some performance analysis and
improvements he has been working on for Linux/powerpc syscalls,
culminating with an implementation of the new system call instruction
introduced in the IBM POWER9 processor.