Hello, On 10/19/2018 11:25 PM, LinAdmin wrote: > On 19.10.2018 20:12, Uwe Kleine-König wrote: >> Hello, >> >> On 10/19/2018 04:39 PM, LinAdmin wrote: >>> When the system is idle, one CPU is always busy at least 50% >>> with a kworker thread which IMHO does not perform any useful >>> work. When idle, the kernel 4.9.y built exclusively for >>> Marvell has both CPU’s at below 1% load. >> How do you diagnose that? I have an Turris Omnia here which is powered >> by an Armada385, too. I just logged into it, the load average is below >> 0.1 and according to htop the CPUs run at < 1%. >> >> Best regards >> Uwe >> > Using top or htop show that cpu load. Please do the following as root: echo 1 > /sys/kernel/debug/tracing/events/workqueue/enabled and then after some time extract (and report) the output of cat /sys/kernel/debug/tracing/trace . Best regards Uwe
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