Please what is the safe temperature of CPU?? I have CPU in powersave mode and temperature is about 50C :-(
--The question was not inline with the other thread so i move it to a new thread-- In my signature you will find a link for "Thermal Testing" which will give you great details on what the i.MX6 can be expected to do from a temp stand point. That said, if your core temp is at 50C that aligns with a CPU with at least 2 full cores worth of workload, def not what it should be at if idle. Can you confirm the image version you are using? Provide the command you are using to get the core temp? Provide an output of the 'top' command or maybe just " top -i "
Code: top - 01:27:23 up 27 min, 1 user, load average: 0.16, 0.13, 0.08 Tasks: 85 total, 1 running, 84 sleeping, 0 stopped, 0 zombie Cpu(s): 0.0%us, 0.2%sy, 0.0%ni, 99.8%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 896632k total, 158472k used, 738160k free, 5168k buffers Swap: 0k total, 0k used, 0k free, 80852k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 11 root 20 0 0 0 0 S 0 0.0 0:00.63 kworker/u:1 1399 root 20 0 0 0 0 S 0 0.0 0:01.56 mmcqd/0 3405 root 20 0 0 0 0 S 0 0.0 0:00.49 kworker/u:2 3487 ubuntu 20 0 2284 992 744 R 0 0.1 0:00.08 top 1 root 20 0 3060 1416 952 S 0 0.2 0:02.03 init 2 root 20 0 0 0 0 S 0 0.0 0:00.00 kthreadd 3 root 20 0 0 0 0 S 0 0.0 0:00.10 ksoftirqd/0 4 root 20 0 0 0 0 S 0 0.0 0:01.79 kworker/0:0 5 root 20 0 0 0 0 S 0 0.0 0:00.17 kworker/u:0 6 root RT 0 0 0 0 S 0 0.0 0:00.00 migration/0 7 root RT 0 0 0 0 S 0 0.0 0:00.00 migration/1 8 root 20 0 0 0 0 S 0 0.0 0:00.00 kworker/1:0 9 root 20 0 0 0 0 S 0 0.0 0:00.03 ksoftirqd/1 10 root 0 -20 0 0 0 S 0 0.0 0:00.00 khelper 396 root 20 0 0 0 0 S 0 0.0 0:00.00 sync_supers 398 root 20 0 0 0 0 S 0 0.0 0:00.00 bdi-default 400 root 0 -20 0 0 0 S 0 0.0 0:00.00 kblockd Code: cat /sys/devices/virtual/thermal/thermal_zone0/temp LINARO 11 Board is on the desk not in any box :-(
hmm well there is def no load on the board and that is the same command i use to pull core temp.. Do you have a dual core or a quad core board? All of my testing was based on a quad core so everything that follows, i can only said for a quad core Based on the testing i did your Core temp should be just under 40C.. Its not harmful to be at 50, under full load it can get to over 60. I dont think you are at risk for burning out the core but it is very curious. Do you have the board sitting on anything warm? external hard drive, laptop anything like that? i found things like that caused the core temp be a bit higher (albeit not that much higher). If you are concerned you can try and put in a support request with UDOO they may be able to provide more specific testing direction, but like i said i dont think your at risk for burning it out, but it does seem high to be idle. I never had anyone provide an contradictory info to my testing but its possible my results are lower than average (i only have 1 board to work with). and i never tested the Dual core board cause i dont have one
I have DUAL CORE After 10min Code: fulload() { dd if=/dev/zero of=/dev/null & }; fulload; read; temp. is 66 C Board is on the desk.
yea i starting to think that might have been it.. that temp is probably fine but i dont have one to draw direct comparison. The dual core has a much smaller heatsink 66C at 50% load (results of that command) is probably ok, you may get over 70C with 100% load, but again i cant validate any of it because i dont have one. In general i would say as long as you are not breaching 80C you should be fine, but im def not the final authority on this as i haev never actually tested the dual core board.
But this core have a operation temperature from -20C to 100C This means that 100-110 it should be good or not ???
i havent pulled the datasheet but if you did, then yea that sounds right.. What i meant really was that if you start getting over 80C then you might need to check into it more.. i wasn't implying it was 'bad' If you have something saying its save to 100C then you are probably fine... To get back to your original question and point thought... i dont have the data on what the dual core board should run at for idle, 50% or 100% loads so i cant say yours is running hot or not. What i can say though is that at this point it is not running 'too hot' and there is no cause for alarm. Without having a dual core board myself i dont think i can provide much more reliable feedback
freescale i.MX 6Dual family Consumer (-20C to +105C), up to 1.2 GHz Industrial (-40C to +105C), up to 800 MHz Automotive (-40C to +125C), AEC-Q100, up to 1 GHz
sorry for duallite 21 x 21 0.8 mm BGA Consumer (0C to +95C -20C to +105C or -20C to +105C), up to 1 GHz Industrial (-40C to +105C), up to 800 MHz Automotive (-40C to +125C)
