kaiomatico

Hi all,
 
   I wrote to amlogic mailing list and I got the tips to build a kernel with DVFS enabled on OdroidC1.
I redid some tests using sbc-bench:
Original Odroid Ubuntu 16.04 with 3.10 kernel (1824MHz): http://ix.io/1zdB Armbian 5.74 with 5.0.0-rc5 kernel (1200MHz NO DVFS): http://ix.io/1ApT Armbian 5.75 with 5.0.0-rc5 kernel (1536MHz DVFS): http://ix.io/1APH Original 3.10 kernel has a big big margin on tinymembench (about twice as fast as 5.0.0-rc5 with DVFS); 3.10 is 50% faster in OpenSSL and both kernels are tie on 7-zip (a bit faster 5.0.0-rc5).
Attached the kernel-config I used to build kernel as reference and dmesg.
 
*Ciao
Piero
linux-5.0.0-rc5-dmesg.txt
linux-odroidc1-next.config

Yes... it should but it is not :)
Here is my dmesg from 5.0-rc5
[ 0.000000] Booting Linux on physical CPU 0x200 [ 0.000000] Linux version 5.0.0-rc5-odroidc1 (root@ubuntu-bionic) (gcc version 7.2.1 20171011 (Linaro GCC 7.2-2017.11)) #5.74 SMP Thu Feb 7 12:00:17 UTC 2019 [ 0.000000] CPU: ARMv7 Processor [410fc051] revision 1 (ARMv7), cr=10c5387d [ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache [ 0.000000] OF: fdt: Machine model: Hardkernel ODROID-C1 [ 0.000000] Memory policy: Data cache writealloc [ 0.000000] efi: Getting EFI parameters from FDT: [ 0.000000] efi: UEFI not found. [ 0.000000] cma: Reserved 64 MiB at 0x3c000000 [ 0.000000] On node 0 totalpages: 261632 [ 0.000000] Normal zone: 1724 pages used for memmap [ 0.000000] Normal zone: 0 pages reserved [ 0.000000] Normal zone: 196096 pages, LIFO batch:63 [ 0.000000] HighMem zone: 65536 pages, LIFO batch:15 [ 0.000000] random: get_random_bytes called from start_kernel+0x7c/0x468 with crng_init=0 [ 0.000000] percpu: Embedded 17 pages/cpu @(ptrval) s40460 r8192 d20980 u69632 [ 0.000000] pcpu-alloc: s40460 r8192 d20980 u69632 alloc=17*4096 [ 0.000000] pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3 [ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 259908 [ 0.000000] Kernel command line: root=UUID=dd21bb52-5ccf-4482-9d23-0b5d2655c174 rootwait rw console=ttyAML0,115200n8 rootfstype=ext4 loglevel=3 no_console_suspend consoleblank=0 vdaccfg=0xa000 logo=osd1,loaded,0x7900000,720p,full dmfc=3 cvbsmode=576cvbs hdmimode=1080p m_bpp=32 vout=hdmi disableuhs disablehpd=true monitor_onoff=false max_freq=1536 usbhid.quirks=0x0eef:0x0005:0x0004 [ 0.000000] Dentry cache hash table entries: 131072 (order: 7, 524288 bytes) [ 0.000000] Inode-cache hash table entries: 65536 (order: 6, 262144 bytes) [ 0.000000] Memory: 949052K/1046528K available (11264K kernel code, 1022K rwdata, 2996K rodata, 1024K init, 323K bss, 31940K reserved, 65536K cma-reserved, 196608K highmem) [ 0.000000] Virtual kernel memory layout: vector : 0xffff0000 - 0xffff1000 ( 4 kB) fixmap : 0xffc00000 - 0xfff00000 (3072 kB) vmalloc : 0xf0800000 - 0xff800000 ( 240 MB) lowmem : 0xc0000000 - 0xf0000000 ( 768 MB) pkmap : 0xbfe00000 - 0xc0000000 ( 2 MB) modules : 0xbf000000 - 0xbfe00000 ( 14 MB) .text : 0x(ptrval) - 0x(ptrval) (12256 kB) .init : 0x(ptrval) - 0x(ptrval) (1024 kB) .data : 0x(ptrval) - 0x(ptrval) (1023 kB) .bss : 0x(ptrval) - 0x(ptrval) ( 324 kB) [ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1 [ 0.000000] rcu: Hierarchical RCU implementation. [ 0.000000] rcu: RCU event tracing is enabled. [ 0.000000] rcu: RCU restricting CPUs from NR_CPUS=16 to nr_cpu_ids=4. [ 0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies. [ 0.000000] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=4 [ 0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16 [ 0.000000] irq_meson_gpio: 119 to 8 gpio interrupt mux initialized [ 0.000000] L2C: DT/platform modifies aux control register: 0x02060000 -> 0x02460000 [ 0.000000] L2C-310 erratum 769419 enabled [ 0.000000] L2C-310 ID prefetch enabled, offset 1 lines [ 0.000000] L2C-310 dynamic clock gating enabled, standby mode enabled [ 0.000000] L2C-310 cache controller enabled, 8 ways, 512 kB [ 0.000000] L2C-310: CACHE_ID 0x4100a0c9, AUX_CTRL 0x36460000 [ 0.000014] sched_clock: 32 bits at 1000kHz, resolution 1000ns, wraps every 2147483647500ns [ 0.000029] clocksource: timer: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 1911260446275 ns [ 0.000062] Switching to timer-based delay loop, resolution 1000ns [ 0.000607] Console: colour dummy device 80x30 [ 0.000641] Calibrating delay loop (skipped), value calculated using timer frequency.. 2.00 BogoMIPS (lpj=10000) [ 0.000651] pid_max: default: 32768 minimum: 301 [ 0.000790] Mount-cache hash table entries: 2048 (order: 1, 8192 bytes) [ 0.000800] Mountpoint-cache hash table entries: 2048 (order: 1, 8192 bytes) [ 0.001519] CPU: Testing write buffer coherency: ok [ 0.001822] CPU0: thread -1, cpu 0, socket 2, mpidr 80000200 [ 0.002542] Setting up static identity map for 0x300000 - 0x300060 [ 0.002672] rcu: Hierarchical SRCU implementation. [ 0.003565] EFI services will not be available. [ 0.003770] smp: Bringing up secondary CPUs ... [ 0.004353] CPU1: thread -1, cpu 1, socket 2, mpidr 80000201 [ 0.005030] CPU2: thread -1, cpu 2, socket 2, mpidr 80000202 [ 0.005674] CPU3: thread -1, cpu 3, socket 2, mpidr 80000203 [ 0.005767] smp: Brought up 1 node, 4 CPUs [ 0.005775] SMP: Total of 4 processors activated (8.00 BogoMIPS). [ 0.005778] CPU: All CPU(s) started in SVC mode. [ 0.006631] devtmpfs: initialized [ 0.011211] VFP support v0.3: implementor 41 architecture 2 part 30 variant 5 rev 1 [ 0.011404] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns [ 0.011419] futex hash table entries: 1024 (order: 4, 65536 bytes) [ 0.014525] xor: measuring software checksum speed [ 0.110240] arm4regs : 1002.800 MB/sec [ 0.210239] 8regs : 847.200 MB/sec [ 0.310234] 32regs : 928.000 MB/sec [ 0.410236] neon : 832.800 MB/sec [ 0.410242] xor: using function: arm4regs (1002.800 MB/sec) [ 0.410302] pinctrl core: initialized pinctrl subsystem [ 0.410967] DMI not present or invalid. [ 0.411350] NET: Registered protocol family 16 [ 0.415730] DMA: preallocated 2048 KiB pool for atomic coherent allocations [ 0.416941] cpuidle: using governor menu [ 0.417711] No ATAGs? [ 0.417819] hw-breakpoint: found 2 (+1 reserved) breakpoint and 1 watchpoint registers. [ 0.417824] hw-breakpoint: maximum watchpoint size is 4 bytes. [ 0.418362] Serial: AMBA PL011 UART driver [ 0.600304] raid6: neonx8 gen() 375 MB/s [ 0.770244] raid6: neonx8 xor() 365 MB/s [ 0.940275] raid6: neonx4 gen() 574 MB/s [ 1.110283] raid6: neonx4 xor() 531 MB/s [ 1.280337] raid6: neonx2 gen() 554 MB/s [ 1.450272] raid6: neonx2 xor() 546 MB/s [ 1.620368] raid6: neonx1 gen() 388 MB/s [ 1.790228] raid6: neonx1 xor() 420 MB/s [ 1.960429] raid6: int32x8 gen() 155 MB/s [ 2.130363] raid6: int32x8 xor() 109 MB/s [ 2.300404] raid6: int32x4 gen() 160 MB/s [ 2.470287] raid6: int32x4 xor() 125 MB/s [ 2.640524] raid6: int32x2 gen() 153 MB/s [ 2.810400] raid6: int32x2 xor() 152 MB/s [ 2.980354] raid6: int32x1 gen() 143 MB/s [ 3.150329] raid6: int32x1 xor() 141 MB/s [ 3.150334] raid6: using algorithm neonx4 gen() 574 MB/s [ 3.150338] raid6: .... xor() 531 MB/s, rmw enabled [ 3.150341] raid6: using neon recovery algorithm [ 3.151850] VCC1V8: supplied by P5V0 [ 3.152121] VCC3V3: supplied by P5V0 [ 3.152368] DDR_VDDC: supplied by P5V0 [ 3.152614] VDD_RTC: supplied by VCC3V3 [ 3.154615] vgaarb: loaded [ 3.155294] SCSI subsystem initialized [ 3.155483] libata version 3.00 loaded. [ 3.155694] usbcore: registered new interface driver usbfs [ 3.155734] usbcore: registered new interface driver hub [ 3.155802] usbcore: registered new device driver usb [ 3.156156] pps_core: LinuxPPS API ver. 1 registered [ 3.156161] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it> [ 3.156179] PTP clock support registered [ 3.156302] EDAC MC: Ver: 3.0.0 [ 3.158216] clocksource: Switched to clocksource timer [ 3.641608] NET: Registered protocol family 2 [ 3.642273] tcp_listen_portaddr_hash hash table entries: 512 (order: 0, 6144 bytes) [ 3.642300] TCP established hash table entries: 8192 (order: 3, 32768 bytes) [ 3.642382] TCP bind hash table entries: 8192 (order: 4, 65536 bytes) [ 3.642484] TCP: Hash tables configured (established 8192 bind 8192) [ 3.642596] UDP hash table entries: 512 (order: 2, 16384 bytes) [ 3.642638] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes) [ 3.642819] NET: Registered protocol family 1 [ 3.643342] RPC: Registered named UNIX socket transport module. [ 3.643347] RPC: Registered udp transport module. [ 3.643350] RPC: Registered tcp transport module. [ 3.643353] RPC: Registered tcp NFSv4.1 backchannel transport module. [ 3.643362] PCI: CLS 0 bytes, default 64 [ 3.643719] Trying to unpack rootfs image as initramfs... [ 3.846064] Freeing initrd memory: 3836K [ 3.847576] hw perfevents: enabled with armv7_cortex_a5 PMU driver, 3 counters available [ 3.848836] Initialise system trusted keyrings [ 3.849040] workingset: timestamp_bits=14 max_order=18 bucket_order=4 [ 3.856030] squashfs: version 4.0 (2009/01/31) Phillip Lougher [ 3.856639] NFS: Registering the id_resolver key type [ 3.856662] Key type id_resolver registered [ 3.856665] Key type id_legacy registered [ 3.856703] ntfs: driver 2.1.32 [Flags: R/O]. [ 3.857138] SGI XFS with ACLs, security attributes, realtime, no debug enabled [ 3.958098] Key type asymmetric registered [ 3.958105] Asymmetric key parser 'x509' registered [ 3.958170] bounce: pool size: 64 pages [ 3.958328] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 247) [ 3.958523] io scheduler mq-deadline registered [ 3.958528] io scheduler kyber registered [ 3.961584] GPIO line 417 (usb-hub-reset) hogged as output/high [ 3.964017] soc soc0: Amlogic Meson8b (S805) RevA (1b - 0:B72) detected [ 3.964645] pwm-regulator regulator-vcck: Failed to get PWM: -517 [ 4.012372] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled [ 4.014184] c81004c0.serial: ttyAML0 at MMIO 0xc81004c0 (irq = 25, base_baud = 9960937) is a meson_uart [ 4.014243] printk: console [ttyAML0] enabled [ 4.014690] STMicroelectronics ASC driver initialized [ 4.025977] brd: module loaded [ 4.033940] loop: module loaded [ 4.036753] libphy: Fixed MDIO Bus: probed [ 4.037757] CAN device driver interface [ 4.038350] e1000e: Intel(R) PRO/1000 Network Driver - 3.2.6-k [ 4.038354] e1000e: Copyright(c) 1999 - 2015 Intel Corporation. [ 4.038401] igb: Intel(R) Gigabit Ethernet Network Driver - version 5.4.0-k [ 4.038405] igb: Copyright (c) 2007-2014 Intel Corporation. [ 4.039510] meson8b-dwmac c9410000.ethernet: PTP uses main clock [ 4.040026] meson8b-dwmac c9410000.ethernet: User ID: 0x10, Synopsys ID: 0x37 [ 4.040036] meson8b-dwmac c9410000.ethernet: DWMAC1000 [ 4.040044] meson8b-dwmac c9410000.ethernet: DMA HW capability register supported [ 4.040049] meson8b-dwmac c9410000.ethernet: RX Checksum Offload Engine supported [ 4.040056] meson8b-dwmac c9410000.ethernet: COE Type 2 [ 4.040061] meson8b-dwmac c9410000.ethernet: TX Checksum insertion supported [ 4.040066] meson8b-dwmac c9410000.ethernet: Wake-Up On Lan supported [ 4.040103] meson8b-dwmac c9410000.ethernet: Normal descriptors [ 4.040109] meson8b-dwmac c9410000.ethernet: Ring mode enabled [ 4.040115] meson8b-dwmac c9410000.ethernet: Enable RX Mitigation via HW Watchdog Timer [ 4.118257] libphy: stmmac: probed [ 4.123586] pegasus: v0.9.3 (2013/04/25), Pegasus/Pegasus II USB Ethernet driver [ 4.123647] usbcore: registered new interface driver pegasus [ 4.123689] usbcore: registered new interface driver asix [ 4.123718] usbcore: registered new interface driver ax88179_178a [ 4.123747] usbcore: registered new interface driver cdc_ether [ 4.123784] usbcore: registered new interface driver smsc75xx [ 4.123823] usbcore: registered new interface driver smsc95xx [ 4.123858] usbcore: registered new interface driver net1080 [ 4.123889] usbcore: registered new interface driver cdc_subset [ 4.123917] usbcore: registered new interface driver zaurus [ 4.123962] usbcore: registered new interface driver cdc_ncm [ 4.125107] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver [ 4.125112] ehci-pci: EHCI PCI platform driver [ 4.125144] ehci-platform: EHCI generic platform driver [ 4.125277] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver [ 4.125296] ohci-pci: OHCI PCI platform driver [ 4.125333] ohci-platform: OHCI generic platform driver [ 4.125795] usbcore: registered new interface driver usb-storage [ 4.127650] i2c /dev entries driver [ 4.129521] meson_wdt c1109900.watchdog: Watchdog enabled (timeout=8 sec, nowayout=0) [ 4.130899] sdhci: Secure Digital Host Controller Interface driver [ 4.130902] sdhci: Copyright(c) Pierre Ossman [ 4.132484] sdhci-pltfm: SDHCI platform and OF driver helper [ 4.133046] ledtrig-cpu: registered to indicate activity on CPUs [ 4.133405] usbcore: registered new interface driver usbhid [ 4.133409] usbhid: USB HID core driver [ 4.133993] meson-saradc c1108680.adc: Linked as a consumer to regulator.2 [ 4.135469] Initializing XFRM netlink socket [ 4.136063] NET: Registered protocol family 10 [ 4.137078] Segment Routing with IPv6 [ 4.137148] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver [ 4.137700] NET: Registered protocol family 17 [ 4.137745] bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this. [ 4.137749] can: controller area network core (rev 20170425 abi 9) [ 4.137803] NET: Registered protocol family 29 [ 4.137808] can: raw protocol (rev 20170425) [ 4.137813] can: broadcast manager protocol (rev 20170425 t) [ 4.137821] can: netlink gateway (rev 20170425) max_hops=1 [ 4.138094] Key type dns_resolver registered [ 4.138840] ThumbEE CPU extension supported. [ 4.138851] Registering SWP/SWPB emulation handler [ 4.139407] Loading compiled-in X.509 certificates [ 4.141103] Btrfs loaded, crc32c=crc32c-generic [ 4.149904] TFLASH_VDD: supplied by VCC3V3 [ 4.151111] pwm-regulator regulator-vcck: Failed to get PWM: -517 [ 4.151897] dwc2 c90c0000.usb: c90c0000.usb supply vusb_d not found, using dummy regulator [ 4.151957] dwc2 c90c0000.usb: Linked as a consumer to regulator.0 [ 4.151970] dwc2 c90c0000.usb: c90c0000.usb supply vusb_a not found, using dummy regulator [ 4.218242] dwc2 c90c0000.usb: dwc2_check_params: Invalid parameter lpm=1 [ 4.218252] dwc2 c90c0000.usb: dwc2_check_params: Invalid parameter lpm_clock_gating=1 [ 4.218259] dwc2 c90c0000.usb: dwc2_check_params: Invalid parameter besl=1 [ 4.218265] dwc2 c90c0000.usb: dwc2_check_params: Invalid parameter hird_threshold_en=1 [ 4.219137] dwc2 c90c0000.usb: DWC OTG Controller [ 4.219164] dwc2 c90c0000.usb: new USB bus registered, assigned bus number 1 [ 4.219200] dwc2 c90c0000.usb: irq 26, io mem 0xc90c0000 [ 4.219970] hub 1-0:1.0: USB hub found [ 4.220014] hub 1-0:1.0: 1 port detected [ 4.220942] iio_hwmon: probe of iio-hwmon failed with error -22 [ 4.222965] platform c1108c20.mmc:slot@1: Linked as a consumer to regulator.6 [ 4.223020] platform c1108c20.mmc:slot@1: Linked as a consumer to regulator.7 [ 4.223389] platform c1108c20.mmc:slot@1: Got CD GPIO [ 4.250037] pwm-regulator regulator-vcck: Failed to get PWM: -517 [ 4.251015] pwm-regulator regulator-vcck: Failed to get PWM: -517 [ 4.251783] hctosys: unable to open rtc device (rtc0) [ 4.252143] DDR_VDDC: disabling [ 4.252150] VDD_RTC: disabling [ 4.252156] TF_IO: disabling [ 4.254639] Freeing unused kernel memory: 1024K [ 4.298364] Run /init as init process [ 4.349905] random: systemd-udevd: uninitialized urandom read (16 bytes read) [ 4.350506] random: systemd-udevd: uninitialized urandom read (16 bytes read) [ 4.350638] random: systemd-udevd: uninitialized urandom read (16 bytes read) [ 4.388515] mmc0: new SDHC card at address aaaa [ 4.389066] mmcblk0: mmc0:aaaa SU04G 3.69 GiB [ 4.406149] mmcblk0: p1 [ 4.407459] pwm-regulator regulator-vcck: Failed to get PWM: -517 [ 4.658265] usb 1-1: new high-speed USB device number 2 using dwc2 [ 4.690779] random: fast init done [ 4.910645] hub 1-1:1.0: USB hub found [ 4.911000] hub 1-1:1.0: 4 ports detected [ 4.914089] pwm-regulator regulator-vcck: Failed to get PWM: -517 [ 5.971471] EXT4-fs (mmcblk0p1): mounted filesystem with writeback data mode. Opts: (null) [ 7.272782] systemd[1]: System time before build time, advancing clock. [ 7.369496] systemd[1]: systemd 232 running in system mode. (+PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD +IDN) [ 7.369956] systemd[1]: Detected architecture arm. [ 7.399578] systemd[1]: Set hostname to <odroidc1>. [ 8.104481] systemd[1]: Started Dispatch Password Requests to Console Directory Watch. [ 8.128603] systemd[1]: Listening on udev Control Socket. [ 8.158514] systemd[1]: Listening on fsck to fsckd communication Socket. [ 8.188599] systemd[1]: Started Forward Password Requests to Wall Directory Watch. [ 8.218386] systemd[1]: Reached target Encrypted Volumes. [ 8.248517] systemd[1]: Listening on /dev/initctl Compatibility Named Pipe. [ 8.278533] systemd[1]: Listening on Journal Socket (/dev/log). [ 8.609781] EXT4-fs (mmcblk0p1): re-mounted. Opts: commit=600,errors=remount-ro [ 9.444376] systemd-journald[232]: Received request to flush runtime journal from PID 1 [ 10.915382] zram: Added device: zram0 [ 10.917932] zram: Added device: zram1 [ 10.926077] zram: Added device: zram2 [ 10.927684] zram: Added device: zram3 [ 10.934391] zram: Added device: zram4 [ 10.940187] zram: Added device: zram5 [ 11.117781] zram1: detected capacity change from 0 to 130490368 [ 11.548328] Adding 127428k swap on /dev/zram1. Priority:5 extents:1 across:127428k SS [ 11.551168] zram2: detected capacity change from 0 to 130490368 [ 11.587999] Adding 127428k swap on /dev/zram2. Priority:5 extents:1 across:127428k SS [ 11.591152] zram3: detected capacity change from 0 to 130490368 [ 11.625298] Adding 127428k swap on /dev/zram3. Priority:5 extents:1 across:127428k SS [ 11.627638] zram4: detected capacity change from 0 to 130490368 [ 11.660850] Adding 127428k swap on /dev/zram4. Priority:5 extents:1 across:127428k SS [ 11.864681] zram0: detected capacity change from 0 to 52428800 [ 12.148292] EXT4-fs (zram0): mounted filesystem without journal. Opts: discard [ 13.309435] random: crng init done [ 13.309443] random: 7 urandom warning(s) missed due to ratelimiting [ 18.295575] EXT4-fs (mmcblk0p1): resizing filesystem from 262144 to 915840 blocks [ 30.168316] EXT4-fs (mmcblk0p1): resized to 524288 blocks [ 50.280574] EXT4-fs (mmcblk0p1): resized filesystem to 915840 [ 51.816789] systemd[1]: apt-daily-upgrade.timer: Adding 35min 38.019240s random time. [ 59.181309] meson8b-dwmac c9410000.ethernet eth0: device MAC address 66:f6:65:b7:f3:96 [ 59.183411] RTL8211F Gigabit Ethernet stmmac-0:00: attached PHY driver [RTL8211F Gigabit Ethernet] (mii_bus:phy_addr=stmmac-0:00, irq=40) [ 59.185656] meson8b-dwmac c9410000.ethernet eth0: No Safety Features support found [ 59.185671] meson8b-dwmac c9410000.ethernet eth0: PTP not supported by HW [ 59.187502] meson8b-dwmac c9410000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx [ 59.187545] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready [ 86.337718] systemd[1]: apt-daily-upgrade.timer: Adding 42min 38.210741s random time. [ 87.430720] systemd[1]: apt-daily-upgrade.timer: Adding 6min 35.818165s random time. [ 94.593128] systemd[1]: apt-daily-upgrade.timer: Adding 44min 58.400343s random time. I'm going to write to amlogic kernel mailing list to get more info on this issue.
 
*Ciao
Piero

Make a copy with appropriate name ... you will get many new options in the kernel compilation time and your new "dev" kernel will be saved in output/config ... once it's done and if it makes any results, you can sent it upstream, placed over old one in config/kernel/ which currently does not exists.
 
well, just do some study here https://docs.armbian.com/Developer-Guide_Build-Preparation/

https://github.com/armbian/build/pull/1246