On 26 August 2016 at 19:10, Mac Lin <[email protected]> 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
