Re: Random abnormal high CPU sys usage related to timer

[Vegard Nossum]

On 26 August 2016 at 19:10, Mac Lin <mkl0301@xxxxxxxxx> wrote:
> We were having issue with our userspace application which
> __sometimes__ result in high CPU sys usage at each execution. The high
> sys CPU usage persist until the application is killed.
[...]
> Googling found one issue that seems related, but no further action.

Was it this one? https://lkml.org/lkml/2016/8/23/360

If so you may try to revert commit ff9a9b4c4334 ("sched, time: Switch
VIRT_CPU_ACCOUNTING_GEN to jiffy granularity") to see if it helps.


Vegard