The life of a keystroke
a slow system call gives the CPU away, and an interrupt brings the process back
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Memory of A
PID 4200 · getc.c
The CPU
one core · one mode bit
I/O devices
they can interrupt the CPU
Memory of B
PID 4300 · spin.c
The code
two programs and the kernel
The kernel's queues
who may run · who waits · what was typed
The terminal