The Speed of Time
Brendan Gregg
SEPTEMBER 25, 2021
This server is spending about a third of its CPU cycles just checking the time! As a Xen guest, this profile was gathered using perf(1) and the kernel's software cpu-clock soft interrupts, not the hardware NMI. Colleagues/Internet I love using [Linux performance tools]. 30.14% in the middle of the flame graph.
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