Latency ?

Generally speaking, it is a time interval between the stimulation and response

In computer science, it is the duration between the receipt of an event and the moment when it is handled

• e.g.:
• The duration between the reception time of an interrupt and the time a thread waiting for that interrupt is run
• The duration between a timer expiration and the time a thread waiting for that timer is run
• The duration between the receipt of a network packet and the time a thread waiting for that packet is run

Time

Event

Event handling

Scheduling

Application thread

Latency

Event handling

Kernel space

User space

Context

switch