hatahata

hi all . i got a old pandaboard only $20 by auction . i expirienced RS232C conection to install freebsd & arch (fail to install openbsd ) . RS232C is impressive to me . i guess that the armbian developers usually use rs232c . is it right ? if you have some interrest , please see http://akita-arm.blogspot.jp/2016/08/pandaboard-openbsd.html . two green palates is the thing on which we use kitchin knife on . it is easylly cut by scissors and holed out by electric drill and cheap only $1 . ------ thanks

i find a page about heat sink of parallela ( http://www.rs-online.com/designspark/electronics/jpn/blog/content-1032). this also has lateral sid fan .

hi all . when sysbench --test=cpu --cpu-max-prime=200000 run --num-threads=8 case 1) fan from upper , CPU temperature is 85 ~ 86 degree case 2) fan from lateral side , CPU temperature is 75 ~ 76 degree lateral is much better without fan Fri Jul 22 11:42:19 JST 2016 58 start lateral side fun Fri Jul 22 11:47:39 JST 2016 41

i try partially. 1) # date ; dd if=/dev/zero of=/ma1/k-test bs=1M count=1K && sync ; date Thu Jul 21 04:32:26 JST 2016 1024+0 records in 1024+0 records out 1073741824 bytes (1.1 GB) copied, 37.0172 s, 29.0 MB/s Thu Jul 21 04:33:08 JST 2016 hard disk is old IDE . 2) iperf -s ------------------------------------------------------------ Server listening on TCP port 5001 TCP window size: 85.3 KByte (default) ------------------------------------------------------------ I only use 5mm thickness heat conducting material and alminium cap only . then Thu Jul 21 04:46:25 JST 2016 temperature -> 60 total used free shared buffers cached Mem: 872328 821296 51032 17908 21068 626484 when using plus active cooling by cooleng fan for raspberry pi Thu Jul 21 05:03:42 JST 2016 42 total used free shared buffers cached Mem: 872328 823560 48768 17908 23628 626752 i think 8 core is like a 8 cylinder engine . so it is harder to controll than 2 cylinder engine . but more and more expirience is piled up , someday breakthrough occur , i believe ---- regards

i imagine banana pi 2 core -> 25 degree odroid-c2 4 core -> 55 degree nano pi M3 8 core ->85 degree then arm 16 core , 115 degree only imagination in fact odroid's 8 core ($79) has active cooling . --- regards ps: nano pi M3 has 3 problems 1) temperature : tkaiser solved 2) cannot use swap 3) cannot see youtube

date ; sysbench --test=cpu --cpu-max-prime=20000 run --num-threads=8 ;date Fri Jul 8 15:24:54 JST 2016 sysbench 0.4.12: multi-threaded system evaluation benchmark Running the test with following options: Number of threads: 8 Doing CPU performance benchmark Threads started! Done. Maximum prime number checked in CPU test: 20000 Test execution summary: total time: 57.0156s total number of events: 10000 total time taken by event execution: 455.8727 per-request statistics: min: 45.43ms avg: 45.59ms max: 77.53ms approx. 95 percentile: 45.67ms Threads fairness: events (avg/stddev): 1250.0000/0.87 execution time (avg/stddev): 56.9841/0.02 Fri Jul 8 15:25:51 JST 2016 and while sysbench --test=cpu --cpu-max-prime=200000 run --num-threads=8 , Fri Jul 8 15:32:58 JST 2016 87 fa@NanoPi3:~$ date ; cat /sys/class/hwmon/hwmon0/device/temp_label Fri Jul 8 15:33:03 JST 2016 87 fa@NanoPi3:~$ date ; cat /sys/class/hwmon/hwmon0/device/temp_label Fri Jul 8 15:33:06 JST 2016 88 fa@NanoPi3:~$ date ; cat /sys/class/hwmon/hwmon0/device/temp_label Fri Jul 8 15:33:09 JST 2016 85 fa@NanoPi3:~$ date ; cat /sys/class/hwmon/hwmon0/device/temp_label Fri Jul 8 15:33:14 JST 2016 88 fa@NanoPi3:~$ date ; cat /sys/class/hwmon/hwmon0/device/temp_label Fri Jul 8 15:33:18 JST 2016 87 fa@NanoPi3:~$ date ; cat /sys/class/hwmon/hwmon0/device/temp_label Fri Jul 8 15:33:23 JST 2016 88 fa@NanoPi3:~$ date ; cat /sys/class/hwmon/hwmon0/device/temp_label Fri Jul 8 15:33:25 JST 2016 85 fa@NanoPi3:~$ date ; cat /sys/class/hwmon/hwmon0/device/temp_label Fri Jul 8 15:33:35 JST 2016 86 fa@NanoPi3:~$ date ; cat /sys/class/hwmon/hwmon0/device/temp_label max is 88 . thanks for advice of detectiing Nano pi M3's CPU temperature !

of course in japan , 10 yen coin ( about $0.1) is made by copper and is the cheapest material. the best is silver coin . are there coins made by copper in USA ? and acryl plate is easily holed out with metal drill . alminium cap presses coins against heat sink and so fixes coins and heat sink . i use

i am suprising your vast knowlege . i only follow 'Install Cross Compiler' of http://wiki.friendlyarm.com/wiki/index.php/NanoPi_M3#Boot_NanoPi_M3_from_SD_Card i use 64bit CPU and 64bit debiandog . i finally underastand that nano pi M3 is 64bit hardware but the present OS is 32 bit . surely nano pi M3 becomes hot and hot and suddenly reboot . so i made the device which misses heat . now there is no rebooting . Because it doesn't work easily, it's fascinating. Because there is mystery, a detective story is read. Because there is a mountain, it's climbed. so i think . --- regards http://akita-8core.blogspot.jp/2016/06/nano-pi-m3.html

this morning , i try to boot nano pi M3 by rebuilded uIimage . nano pi M3 can boot , but swapon /SWAP swapon: /SWAP: swapon failed: Function not implemented --- regards

about nano pi M3 cross compile is possible on debiandog64 (perhaps intel 64bit and debian etc 64bit) see -> http://akita-8core.blogspot.jp/2016/06/nano-pi-m3.html so diff .config .config-ori 53c53 < CONFIG_SWAP=y --- > # CONFIG_SWAP is not set 96d95 < # CONFIG_CGROUP_MEM_RES_CTLR_SWAP is not set 1801,1802c1800 < CONFIG_THERMAL=y < CONFIG_THERMAL_HWMON=y --- > # CONFIG_THERMAL is not set may show CPU temperature , but only posibility . --- regards

i bought nano pi M3 . uname -ar Linux NanoPi3 3.4.39-s5p6818 #2 SMP PREEMPT Fri May 20 15:51:46 HKT 2016 armv7l GNU/Linux and cat /etc/apt/sources.list deb http://ftp.cn.debian.org/debianjessie main non-free contrib deb-src http://ftp.cn.debian.org/debianjessie main non-free contrib but CPU is very hot . but i can not mesure its temperature . (lm-sensors is not OK) usually armbian could make its temperature lower , this was done in case of orange pi PC . http://wiki.friendlyarm.com/wiki/index.php/NanoPi_M3is a page of nano pi M3 ----- regards

i install armbian into banana pi M1 . cat .asoundrc-X pcm.!default { type hw card 2 } ctl.!default { type hw card 2 } and get sound from TV namely HDMI . then i attach HDMI cable to sharp TV . $ aplay -l **** List of PLAYBACK Hardware Devices **** card 0: sunxicodec [sunxi-CODEC], device 0: M1 PCM [sunxi PCM] Subdevices: 1/1 Subdevice #0: subdevice #0 card 1: sunxisndhdmi [sunxi-sndhdmi], device 0: SUNXI-HDMIAUDIO sndhdmi-0 [sunxi HDMI PCM] Subdevices: 1/1 Subdevice #0: subdevice #0 ~$ cat .asoundrc pcm.!default { type hw card 1 } ctl.!default { type hw card 1 } from sharp TV , i cannot get sound from TV, i get it only from audio out . i cannot understand . ---- regards

hi all . i think sd card is much shorter life time and restricted size ( 64G ~ 128G and big size is too expensive ). so as server , i like to use hard disk as root . for this purpose , nand-sata-install.sh is excellent ( but too complex for me to understand ) . i use nand-sata-install.sh on odroid-c2 armbian . and on working armbian , i run next script . ( the timing to attach sdb is about 10~15 second later after armbian booting ) . sda1 is cloned to sdb1 . clone-rsync-2-HDD-delete.bat ntpd -s date echo '--------------------' umount /mb1 mount /dev/sdb1 /mb1 df echo '--------------------' read X echo $X cd /mb1 mkdir -p bin etc home lib opt root sbin selinux srv usr var for x in /bin /etc /home /lib /opt /root /sbin /selinux /srv /usr /var do rsync -avHx --delete $x/ /mb1$x/ done cd /mb1 mkdir -p boot dev media mnt proc run sys tmp it works for me . --- detail is at http://odroid-akita.blogspot.jp/2016/04/odoroid-c2.html

i give up benchmark . at odroid-c2(armbian and over internet ) date ; ./pi.bat ; date 2016å¹´ 6月 7æ—¥ ç«æ›œæ—¥ 05:15:29 JST 3.14159265359 2016å¹´ 6月 7æ—¥ ç«æ›œæ—¥ 05:16:06 JST 37 sec at Intel® Celeron® CPU 540 @ 1.86GHz (kali linux) $ date ; ./pi.bat ; date 2016å¹´ 6月 7æ—¥ ç«æ›œæ—¥ 05:16:17 JST 3.14159265359 2016å¹´ 6月 7æ—¥ ç«æ›œæ—¥ 05:16:28 JST 11 sec here cat pi.bat #!/usr/bin/env python def f(x): return 4 / ( 1.0 + x**2 ) n = 10000000 sum = 0 step = 1.0 / n for i in range(0, n): x = ( i + 0.5 ) * step sum += f(x) pi = sum * step print pi i get pi information at http://netbuffalo.doorblog.jp/archives/4783572.html i tried arch linux on odroid-c2 , but almost all aur fails . and in openbsd , source(ports) is common to all architecture . .this is suprising .

i tried sysbench . sysbench --test=cpu run the result is dmesg | grep CPU0 CPU0: Intel® Celeron® CPU 540 @ 1.86GHz (fam: 06, model: 16, stepping: 01) Threads started! Done. Maximum prime number checked in CPU test: 10000 Test execution summary: total time: 23.2413s total number of events: 10000 total time taken by event execution: 23.2258 per-request statistics: min: 2.20ms avg: 2.32ms max: 10.99ms approx. 95 percentile: 2.39ms Threads fairness: events (avg/stddev): 10000.0000/0.00 execution time (avg/stddev): 23.2258/0.00 odoroid-c2 over internet Threads started! Done. Maximum prime number checked in CPU test: 10000 Test execution summary: total time: 9.6456s total number of events: 10000 total time taken by event execution: 9.6433 per-request statistics: min: 0.96ms avg: 0.96ms max: 1.42ms approx. 95 percentile: 0.97ms Threads fairness: events (avg/stddev): 10000.0000/0.00 execution time (avg/stddev): 9.6433/0.00 odroid-c2 is much faster than Celeron® 1.86GHz