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When running Virtual Machine(KVM) in host, I find that the value of host cpu usage is different between falcon agent and top cmd. Actually, falcon agent use nux package to calculate cpu usage. https://github.com/open-falcon-archive/agent/blob/master/funcs/cpustat.go#L19
In Linux Kernel, User time is already include Guest cpu time. So when read cpu info from /proc/stat, we should not add guest time once more.
User
Guest
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/kernel/sched/cputime.c#n138
Have already make a PR in nux. If merged, I think we need to update this agent.
nux
toolkits/nux#18
The text was updated successfully, but these errors were encountered:
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When running Virtual Machine(KVM) in host, I find that the value of host cpu usage is different between falcon agent and top cmd. Actually, falcon agent use nux package to calculate cpu usage.
https://github.com/open-falcon-archive/agent/blob/master/funcs/cpustat.go#L19
In Linux Kernel,
Usertime is already includeGuestcpu time. So when read cpu info from /proc/stat, we should not add guest time once more.https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/kernel/sched/cputime.c#n138
Have already make a PR in
nux. If merged, I think we need to update this agent.toolkits/nux#18
The text was updated successfully, but these errors were encountered: