allen_key

First of all, thanks @balbes150 . I'm running your modified armbian(Armbian_5.60_Aml-s9xxx_Ubuntu_bionic_default_4.18.7_20180922.img) on my S905D box with dtb file meson-gxl-s905d-p230.dtb. Everything works perfect, but I found there's 2 process kworker/0:1+events_power_efficient and irq/40-0.200808 keep occupy 14% of 1 cpu core, and result load average stay at 2.00 after system boot. May I know if you have any trouble shooting guildline for this issue? I google these 2 processes, but didn't find any useful info. Thanks in advance. Attached is the interrupts info, please kindly let me know if need more info. Thanks. root@N1:/proc# cat interrupts CPU0 CPU1 CPU2 CPU3 1: 0 0 0 0 GICv2 25 Level vgic 3: 8482421 75815 14769 21210 GICv2 30 Level arch_timer 4: 0 0 0 0 GICv2 27 Level kvm guest timer 6: 0 0 0 0 GICv2 169 Level arm-pmu 7: 0 0 0 0 GICv2 170 Level arm-pmu 8: 0 0 0 0 GICv2 185 Level arm-pmu 9: 0 0 0 0 GICv2 186 Level arm-pmu 10: 5 0 0 0 GICv2 105 Edge c1108680.adc 11: 0 0 0 0 GICv2 231 Edge c8100100.cec 12: 9 0 0 0 GICv2 225 Edge ttyAML0 13: 0 0 0 0 GICv2 228 Edge c8100580.ir 14: 0 0 0 0 GICv2 76 Edge vdec 15: 0 0 0 0 GICv2 64 Edge esparserirq 17: 11 0 0 0 GICv2 241 Edge platform_mhu_link 18: 235 0 0 0 GICv2 242 Edge platform_mhu_link 19: 0 0 0 5838 GICv2 40 Edge eth0 20: 218636 61257 0 0 GICv2 248 Edge d0070000.mmc 21: 0 0 0 0 GICv2 249 Edge d0072000.mmc 22: 4403 2151 0 0 GICv2 250 Edge d0074000.mmc 34: 49326 0 0 0 GICv2 35 Edge meson 35: 0 0 0 0 GICv2 89 Edge dw_hdmi_top_irq, c883a000.hdmi-tx 36: 0 0 0 0 GICv2 62 Level xhci-hcd:usb1 40: 235776 0 0 0 meson-gpio-irqchip 29 Level 0.2009087f:00 IPI0: 5809 65965 76143 107392 Rescheduling interrupts IPI1: 679 937 1083 868 Function call interrupts IPI2: 0 0 0 0 CPU stop interrupts IPI3: 0 0 0 0 CPU stop (for crash dump) interrupts IPI4: 0 0 0 0 Timer broadcast interrupts IPI5: 4732 170 56 70 IRQ work interrupts IPI6: 0 0 0 0 CPU wake-up interrupts

Thanks, @5kft @Igor . I have successfully switched to dev kernel(4.18). It looks everything is working like 4.17.

Hello igor, I've run apt upgrade today. It seems you have downgrade the kernel for opi zero plus to 4.14. Meanwhile the 1.3v regulator overlay was removed. May I know how can I use the 1.3v regulator overlay on kernel 4.14 to boost my cpu frequency to 1296Mhz? Sincerely thanks.

I have done a simple openssl benchmark for Allwinner H5 @ 816Mhz vs 1296MHz. Just for all your information, I saw huge performance improvement @ 1296MHz. Command: openssl speed -elapsed -evp aes-128-cbc Thanks, 5kft bring us such useful information again.

Thanks, Igor. But interesting, after applied 1.3v regulator overlay, the cpu frequency could be read correctly on kernel 4.17. It looks the modern kernel can only handle CPU frequency with voltage regulator. BTW, will the 1.3v regulator overlay still exist if you roll back to kernel 4.14? Thanks.

Thanks, 5kft. I tried this MOSFET (https://detail.tmall.com/item.htm?id=42054287753&spm=a1z09.2.0.0.1d862e8dqfVd64&_u=kkr253ef31) with latest nightly release (Armbian_5.59.180815_Orangepizeroplus_Ubuntu_bionic_next_4.17.14). After applied "gpio-regulator-1.3v & cpu-clock-1.3GHz" overlays, my opi zero plus has been successfully actived 1296Mhz frequency. But if I boot my opi with default overlay(kernel 4.17.14), armbianmonitor shows "----" at cpu frequesncy column, dont know why.