rufik

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About rufik

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  1. rufik

    OrangePi PC CPU Frequency

    And check storage performance with all those settings now. You can run it using armbianmonitor with some switch (can't remember which one). My statement is based on some tkaiser's forum writing, and he's rather proven to not spread bs (he just did such tests AFAIK).
  2. rufik

    OrangePi PC CPU Frequency

    Note that anything lower than 480 MHz will trash your storage performance probably. And power saving is also minimal. Consider using 480 as min freq.
  3. Anybody know a way to reset board (OPI PC) immediatly not going through shutdown process? I'm already logged in (ssh session). I've overwritten SD card by mistake, whole fs has gone, and I cant perform reboot or shutdown command (not found) :/
  4. rufik

    systemd 100% CPU on OrangePi One

    Check your cpufreq config for bad entry 408 mhz instead of 480 mhz.
  5. Because everything lower than 480 trashes SD card performance, as@tkaiser wrote a few times.
  6. I'm just getting error starting watchdog service on OPI2 Ubuntu Bionic 4.14.70 like Cannot open /dev/watchdog (errno = 16 = 'Device or resource busy'). rufik@farmer:~$ sudo systemctl status watchdog ● watchdog.service - watchdog daemon Loaded: loaded (/lib/systemd/system/watchdog.service; enabled; vendor preset: enabled) Active: active (running) since Thu 2018-10-11 10:52:08 CEST; 15s ago Process: 17410 ExecStopPost=/bin/sh -c [ $run_wd_keepalive != 1 ] || false (code=exited, status=1/FAILURE) Process: 17436 ExecStart=/bin/sh -c [ $run_watchdog != 1 ] || exec /usr/sbin/watchdog $watchdog_options (code=exited, status=0/SUCCESS) Process: 17433 ExecStartPre=/bin/sh -c [ -z "${watchdog_module}" ] || [ "${watchdog_module}" = "none" ] || /sbin/modprobe $watchdog_module (code=exited, status= Main PID: 17438 (watchdog) CGroup: /system.slice/watchdog.service └─17438 /usr/sbin/watchdog Oct 11 10:52:08 farmer watchdog[17438]: starting daemon (5.14): Oct 11 10:52:08 farmer watchdog[17438]: int=3s realtime=yes sync=no soft=no mla=0 mem=0 Oct 11 10:52:08 farmer watchdog[17438]: ping: no machine to check Oct 11 10:52:08 farmer watchdog[17438]: file: no file to check Oct 11 10:52:08 farmer watchdog[17438]: pidfile: no server process to check Oct 11 10:52:08 farmer watchdog[17438]: interface: no interface to check Oct 11 10:52:08 farmer watchdog[17438]: temperature: no sensors to check Oct 11 10:52:08 farmer watchdog[17438]: test=none(0) repair=none(0) alive=/dev/watchdog heartbeat=none to=root no_act=no force=no Oct 11 10:52:08 farmer watchdog[17438]: cannot open /dev/watchdog (errno = 16 = 'Device or resource busy') Oct 11 10:52:08 farmer systemd[1]: Started watchdog daemon. But /dev/watchdog seems not to be opened: rufik@farmer:~$ sudo fuser -v /dev/watchdog rufik@farmer:~$ sudo lsof /dev/watchdog I have disabled wd_keepalive deamon - is it really required to run? Or just excludes with watchdog daemon?
  7. rufik

    change commit setting when using hdd?

    What commit interval do you advise for kernel 4.14.y using btrfs? Default (5 sec) or just armbian's default 600 sec? I've just migrated to Transcend TS32GMTS400S SSD + USB UASP adapter (ASM1351) via nand-sata-install option...
  8. rufik

    OPi Zero does not get an IP address

    Since I got rid of network manager (configured in old good way) my SBC connection is rock solid. Network Manager is not reliable somehow...
  9. I've already checked - firewall is disabled all the time, because OPI PC is inside my LAN. Nmap show open ports 22, 8123 (HomeAssistant), 3306 (MySQL) and so on. But every service accepts TCP connection and does not respond at all, terminating connection after some timeout. Sshd accepts connection, asks for password and hangs...until timeout. Ping works So it looks like some OS internal problem, maybe with memory and spawning processes/threads? That's why I'd like to try out watchdog.
  10. My OPI PC (mainline kernel) just freezes from time to time, it respond to ping but I cannot ssh into it (waiting forever for session then disconnects), services does not respond also. It looks like some OOM or similar problems, I cannot check it via serial console because it's remote location. So I thought that watchdog would be nice there, just to reset board in such cases.
  11. How is your watchdog doing? Does it work reliable over the time?
  12. I've just played with compilation a little bit and 4.18.y is selected when BRANCH="dev" is set. But script does not take KERNELTAG or KERNELBRANCH variables into account when set up in config-default.conf. Let's play with 4.18.7 kernel a little bit...:)
  13. I saw bionic image for download, so I thought I would build my customized image for OPI PC based on Ubuntu Bionic and 4.18.y kernel, so I have some questions: 1. Is Bionic fully stable/supported for OPI PC? 2. Is kernel 4.18.y supported? Is it sufficient to set KERNELTAG="v4.18.7" to build it? Or I just has to stick with 4.17.y?
  14. rufik

    EMMC vs SSD - durability and speed

    So SSD with SMART + JMS578 adapter is going to be the best choice. I could use it with OPI PC right now and easily migrate to USB 3.0 when needed. What about splitting rootfs into read-only SD card and all data & logs into SSD? It should give me long life of SD card and fast storage capabilites...does it make sense? Is anyone already using such setup or?
  15. rufik

    EMMC vs SSD - durability and speed

    Anyone made random IO benchmarks comparing USB 2.0 and 3.0 adapter? Maybe these 100-200 SQL queries per minute does not require supa-speed? I don't think I need native M.2 slot that costs me $110. I'd like to stick with $50 tag price...