Il giorno venerdì 3 marzo 2017 17:19:17 UTC+1, Dan Zach ha scritto: > 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
My measurements of jitter in a bare-metal cell on a TegraX1 spans between 5us to 20 with a mean value around 11-12 us. Moreover the minimum inter-arrival time between two interrupts to be handled is around ~50us. It seems to me a really high value... Could be tied to a too low value for the clock frequency? Actually if I execute: sudo cat /sys/devices/system/cpu/cpu3/cpufreq/scaling_cur_freq before enabling jailhose I get the following value 1734000 I don't know what does it means (1,7 Ghz in Khz? Weird..) but actually is the highest value you get executing: sudo cat /sys/devices/system/cpu/cpu3/cpufreq/scaling_available_frequencies Regards, Errico Guidieri -- 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.
