methodology for minimizing MonitorMode cpu impact

[jaskcon]

Thomas,
In an effort to minimize the cpu impact associated with foreground monitoring, I've ported the relevant armbianmonitor bash functions to c/c++ (/usr/bin/acm). Have a look and let me know what you think
Thanks and regards,
./j

Note: file error handling has yet to be added, so I'll cross my hand-fingers that you don't hit a seg.fault right out of the gate....(ha^4)

[ThomasKaiser]

I tried to build it but failed. And since I know that other devs aren't exactly happy about an ever growing armbianmonitor script now also needing external tools that need to be packaged I think the best place would be to discuss this over at https://forum.armbian.com/forum/4-development/ first.

But I've to admit that I really like your approach since monitoring that changes the system's behaviour is a bad thing in general (and at least that's what happens with armbianmonitor with too frequent updates now)

[chwe17]

gcc -lm -o acm acm.c and it will compile

Note: file error handling has yet to be added, so I'll cross my hand-fingers that you don't hit a seg.fault right out of the gate....(ha^4)

happens when you call it without sudo

opi@orangepizero:~$ sudo ./acm

cpu statistics monitor_______________________________________________________________________________________________________________________

  hostname: orangepizero

  linux version: 4.14.65-sunxi
  cpu model:  ARMv7 Processor rev 5 (v7l)
  freq.union.cores: 0 1 2 3 
   | min.freq: 240000 
   | max.freq: 1200000
   | freq.gov: ondemand


  ['/'+<ENTER>: flip display mode (fixed-line/scrolling)]
  ['z'+<ENTER>: reset all counters]
  ['q'+<ENTER> || <CTRL-c>: exit cpu statistics monitor

  display interval:  0.100


___________________  |cpu.stats_____________________________________________________________________________________________________________     
                     |
                     |   core.freq       cpu.temp      load.average
Ʃ.int     time       |    0 - 3          °C |°F       1m   5m   15m     idle     cpu      ưcpu      sys     user     nice     ioio     irqs     

17.34     17:43:11       240 MHz       43.3  110.0    0.00 0.02 0.00    1.00     0.00     0.01     0.00     0.00     0.00     0.00     0.00      
/
17.37     17:43:12       240 MHz       43.3  110.0    0.00 0.02 0.00    1.00     0.00     0.01     0.00     0.00     0.00     0.00     0.00     
17.47     17:43:12       240 MHz       43.3  110.0    0.00 0.02 0.00    1.00     0.00     0.01     0.00     0.00     0.00     0.00     0.00     
17.57     17:43:12       240 MHz       43.3  110.0    0.00 0.02 0.00    0.98     0.02     0.01     0.02     0.00     0.00     0.00     0.00     
17.67     17:43:12       240 MHz       43.3  110.0    0.00 0.02 0.00    1.00     0.00     0.01     0.00     0.00     0.00     0.00     0.00     
17.77     17:43:12       240 MHz       43.3  110.0    0.00 0.02 0.00    1.00     0.00     0.01     0.00     0.00     0.00     0.00     0.00     
17.87     17:43:12       240 MHz       43.3  110.0    0.00 0.02 0.00    1.00     0.00     0.01     0.00     0.00     0.00     0.00     0.00     

I know the PR is outdated, but at least you can have a look now..

[lanefu]

@jaskcon is this meant to integrate with armbian monitor or replace?

[lanefu]

@ThomasKaiser @chwe17

Any thoughts on this PR?