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Groups > linux.kernel > #1471001
| From | Vegard Nossum <vegard.nossum@gmail.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: Random abnormal high CPU sys usage related to timer |
| Date | 2016-08-26 23:30 +0200 |
| Message-ID | <sawRj-3Y5-7@gated-at.bofh.it> (permalink) |
| References | <sasXo-1xo-11@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 26 August 2016 at 19:10, Mac Lin <mkl0301@gmail.com> 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
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Random abnormal high CPU sys usage related to timer Mac Lin <mkl0301@gmail.com> - 2016-08-26 19:20 +0200
Re: Random abnormal high CPU sys usage related to timer Vegard Nossum <vegard.nossum@gmail.com> - 2016-08-26 23:30 +0200
Re: Random abnormal high CPU sys usage related to timer Mac Lin <mkl0301@gmail.com> - 2016-08-27 17:20 +0200
Re: Random abnormal high CPU sys usage related to timer Thomas Gleixner <tglx@linutronix.de> - 2016-08-29 12:50 +0200
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