Re: [linux-sunxi] [BUG report] kworker issue for mailline kernel >= 4.12

2018-01-03 Thread Sebastien Lucas
Le mercredi 3 janvier 2018 18:00:01 UTC+1, Vincent Legoll a écrit : > > > root@minus:~# zcat /proc/config.gz | grep SUN4I_GPADC > > CONFIG_MFD_SUN4I_GPADC=m > > CONFIG_SUN4I_GPADC=m > > Are the modules loaded ? > > -- > Vincent Legoll > Yes : root@minus:~# lsmod | grep gpadc sun4i_gpadc_iio

Re: [linux-sunxi] [BUG report] kworker issue for mailline kernel >= 4.12

2018-01-03 Thread Vincent Legoll
Hello, >> Do you have SUN4I_GPADC enabled? AFAIK its interrupt handler busy >> loops, which might be what you are seeing. > It seems so : > > root@minus:~# zcat /proc/config.gz | grep SUN4I_GPADC > CONFIG_MFD_SUN4I_GPADC=m > CONFIG_SUN4I_GPADC=m Are the modules loaded ? -- Vincent Legoll -- Y

Re: [linux-sunxi] [BUG report] kworker issue for mailline kernel >= 4.12

2018-01-03 Thread Sebastien Lucas
Le mercredi 3 janvier 2018 06:58:00 UTC+1, Chen-Yu Tsai a écrit : > > > Do you have SUN4I_GPADC enabled? AFAIK its interrupt handler busy > loops, which might be what you are seeing. > > ChenYu > It seems so : root@minus:~# zcat /proc/config.gz | grep SUN4I_GPADC CONFIG_MFD_SUN4I_GPADC=m CONFI

Re: [linux-sunxi] [BUG report] kworker issue for mailline kernel >= 4.12

2018-01-02 Thread Chen-Yu Tsai
On Thu, Dec 28, 2017 at 10:36 AM, Kai wrote: > Hardware: cubieboard2 & cubietruck > OS: archlinux with mainline kernel 4.12.x/4.13.x/4.14.x > SoC: A20 > > Issue desc: performance sensitive apps run stuttered comparing to they > behave on 4.11.x, top shows "kworker" always kills 6~13% CPU time. > P

[linux-sunxi] [BUG report] kworker issue for mailline kernel >= 4.12

2017-12-28 Thread Kai
Hardware: cubieboard2 & cubietruck OS: archlinux with mainline kernel 4.12.x/4.13.x/4.14.x SoC: A20 Issue desc: performance sensitive apps run stuttered comparing to they behave on 4.11.x, top shows "kworker" always kills 6~13% CPU time. Prior to 4.12.0, "kworker" never stays more than 0.1%. I s