The Speed of Time
Brendan Gregg
SEPTEMBER 25, 2021
Was there some other program consuming CPU, like a misbehaving Ubuntu service that wasn't in CentOS? As a Xen guest, this profile was gathered using perf(1) and the kernel's software cpu-clock soft interrupts, not the hardware NMI. CLI tools The Cassandra systems were EC2 virtual machine (Xen) instances. But I'm not completely sure.
Let's personalize your content