On 2017-03-08 17:41, Dan Zach wrote: > On Wednesday, 8 March 2017 11:48:54 UTC+2, J. Kiszka wrote: >> On 2017-03-03 17:19, Dan Zach wrote: >>> On Friday, 3 March 2017 17:38:27 UTC+2, J. Kiszka wrote: >>>> On 2017-03-03 16:32, Dan Zach wrote: >>>>> Any observations on the timer list? >>>>> >>>> >>>> Nothing obvious. The only difference is virt vs. phys timer registers, >>>> but those shouldn't make a difference. I will have to reproduce the >>>> setup locally. My TK1 is currently out of reach, but the behaviour >>>> should be ARMv7-generic. >>>> >>>> Could you share your non-root RT kernel config? >>>> >>>> Jan >>>> >>>> -- >>>> Siemens AG, Corporate Technology, CT RDA ITP SES-DE >>>> Corporate Competence Center Embedded Linux >>> >>> Please find attached >>> >> >> I was able to reproduce on a Banana Pi, but I didn't debug the root >> cause yet. Workaround: try to enable CONFIG_ARM_LPAE in the non-root >> cell kernel config. >> >> Jan >> >> -- >> Siemens AG, Corporate Technology, CT RDA ITP SES-DE >> Corporate Competence Center Embedded Linux > > Tried with CONFIG_ARM_LPAE on in the non-root linux. The minimal time is > still around 40 uS, when the root cell is stressed, worse case is 700us >
...but the cp15 exits are gone? We are seeing a different issue regarding the latencies then. Tried ftrace already? Jan -- Siemens AG, Corporate Technology, CT RDA ITP SES-DE Corporate Competence Center Embedded Linux -- You received this message because you are subscribed to the Google Groups "Jailhouse" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
