Display a rolling graph of Task CPU usage inside an ESP32
- any Arduino program with wifi, just include the taskman.h, call taskman_setup() in the setup(), and it will serve a graph at port 81 of your ip as below with 100 seconds of 1 second averages of all the tasks above 2% utilization on your esp32
- with 2 cores on the esp32-s (on the ai thinker esp32-cam), the percentages will add to 200%
- it records 100 seconds inside the esp32, but only sends 1-second updates to the graph.
- you can hit refresh to get the full 100 seconds and get rid of any wifi delays on a 1 second update, such as that wobble if the sinewave of fake load below
- also below the moving graph is a snapshot of your tasks, priority, heap highwater mark
- the cpu_monitor runs at prio 7 on core 0 (with wifi and arduino housekeeping), then the web server is prio 5, and wifi 23, so tasks above prio 7 can interfere with data collection if they don't let cpu_monitor run
https://www.reddit.com/r/esp32/comments/1oeq3v6/whats_happening_inside_my_esp32/
- download the .ino and the .h
- edit your ssid and password into the .ino file
- install on esp32
- goto your ip address with port 81, like 192.168.1.111:81
- then add your own code, and delete the lines that produce the fake load on core 0, core 1, and inside the loop
Your own code needs wifi, and these two lines:
#include "taskman.h" // <--- the important bit
void setup(){
taskman_setup(); // <--- the important bit
}
And then access the taskmanager display with 192.168.1.111:81 Your ip address, and PORT 81
Good stuff not added yet
- killing tasks
- changing priorities
The endpoints are below - the esp32 keeps track of 100 points, and will deliver that entire series for every task that every exceeded 2% of its core, or for the current data you can just get the last second snapshot of every 2% plus task. The data collector only runs once per second, so 2 fetchs in a second will give you the same data.
http://192.168.1.111:81/dataInfo
{ "CPU_Monitor": { "core": 0, "prio": 7, "stackHW": 620, "state": 0 }, "IDLE1": { "core": 1, "prio": 0, "stackHW": 572, "state": 1 }, "IDLE0": { "core": 0, "prio": 0, "stackHW": 464, "state": 1 } ... etc ... "Tmr Svc": { "core": 2147483647, "prio": 1, "stackHW": 3608, "state": 2 } }
http://192.168.1.111:81/dataCurrent
{
"loopTask": 3.1,
"IDLE1": 96.6,
"IDLE0": 97.8,
"BusyTask1": 0,
"BusyTask0": 0,
"httpd": 0.3,
"wifi": 1.4
}
http://192.168.1.111:81/data
{
"loopTask": [3.1, 3.1, 3.1, 3.1, 3.1, 3.1, 2.6, 1.8, 1.8, 2.3, 3.1, 3.1, 3.1, 3.1, 3.1, 3.1, 2.9, 2.7, 2.7, 2.7, 2.7, 2.7, 2.7, 2.9, 3.1, 3.1, 3.1, 3.1, 3.1, 3.1, 3.1, 3.1, 3.1, 3.1, 3.1, 3.1, 3.1, 2.9, 2.7, 2.7, 2.7, 2.3, 1.8, 1.8, 1.8, 1.8, 2.5, 3.1, 3.1, 3.1, 3.1, 3.1, 3.1, 3.1, 3.1, 3.1, 3.1, 3.1, 3.1, 3.1, 3.1, 2.9, 2.7, 2.7, 2.7, 2.3, 2.6, 3.1, 3.1, 3.1, 3.1, 2.3, 2.6, 3.1, 3.1, 3.1, 3.1, 3, 3.1, 2.3, 1.8, 1.8, 2.3, 2.7, 2.7, 2.7, 2.9, 3.1, 3.1, 3.1, 3.1, 3.1, 3.1, 3.1, 3.1, 3.1, 3.1, 3.1, 3.1, 3.1],
"IDLE1": [96.9, 96.9, 96.9, 96.5, 96.9, 96.9, 58.7, 2.4, 2.3, 40.9, 96.9, 96.9, 96.9, 96.9, 96.9, 96.9, 61, 13.1, 13.5, 13.5, 13.5, 13.5, 13.5, 50.9, 96.9, 96.9, 96.9, 96.9, 96.9, 96.9, 96.9, 96.9, 96.9, 96.9, 96.9, 96.9, 96.6, 56, 13.1, 13.2, 13.2, 8.9, 2.3, 2.6, 2.4, 2.4, 51.9, 96.9, 96.9, 96.9, 96.9, 96.9, 96.9, 96.9, 96.9, 96.9, 96.9, 96.9, 96.9, 96.9, 96.9, 49.8, 13.2, 13.2, 13.2, 8.1, 56.7, 96.9, 96.5, 96.3, 96.6, 41.3, 57.9, 96.3, 96.6, 96.6, 96.1, 93.4, 96.6, 39.3, 2.7, 2.4, 8.6, 13.1, 13.2, 13.1, 65.9, 96.6, 96.6, 96.6, 96.6, 96.6, 96.6, 96.6, 96.6, 96.6, 96.6, 96.6, 96.6, 96.6],
... etc ...
"wifi": [1.8, 1.6, 1.4, 2.8, 1.8, 1.2, 1.3, 1.4, 1.4, 1.5, 1.3, 1.2, 1.4, 1.7, 2.4, 1.9, 1.7, 1.4, 1.2, 1.9, 1.7, 1.5, 1.8, 1.3, 1.2, 1.3, 1.3, 1.5, 1.6, 1.7, 1.4, 1.2, 1.1, 1.4, 1.1, 1, 1.8, 1.1, 0.9, 1.4, 1.1, 1.1, 1.5, 1.1, 1.1, 1.3, 1.1, 1.2, 1.2, 1.6, 1.4, 1.2, 1.3, 1.4, 1.2, 1.3, 1.3, 1.1, 1, 1.1, 1.3, 1.1, 0.9, 1.4, 1.1, 1.2, 1.2, 1.1, 1.7, 2.1, 1.8, 1.6, 1.8, 2.1, 1.7, 1.8, 2.2, 1.4, 1.9, 2.4, 1.9, 2, 1.8, 1.6, 1.7, 1.8, 1.7, 1.7, 2, 2.5, 2, 1.6, 1.9, 2, 1.6, 1.5, 1.7, 1.6, 2.5, 3]
}