Public bug reported:
I am using Linux Mint 21.3, with gnome-system-monitor 42.0 (gnome-
system-monitor/jammy,jammy,now 42.0-1 amd64 [installed]). I have a
laptop with `12th Gen Intel(R) Core(TM) i5-12500H` CPU.
For power-saving reason, I parked some of the cores when the laptop is
on battery.
```
CPU(s): 16
On-line CPU(s) list: 0,2,4,6,8,10
Off-line CPU(s) list: 1,3,5,7,9,11-15
```
When running `stress`, `glances` shows that the 6 active cores are all
fully in use:
```
Ajax-Laptop (Linux Mint 21.3 64bit / Linux 6.8.0-45-generic) Uptime: 11:54:44
CPU - 100.0% MEM - 26.0% SWAP - 0.0% LOAD 6-core
CPU [100.0%] user 99.3% total 15.2G total 7.63G 1 min: 5.41
MEM [ 26.0%] system 0.7% used 3.97G used 0 5 min: 1.96
SWAP [ 0.0%] iowait 0.0% free 11.3G free 7.63G 15 min: 1.33
NETWORK Rx/s Tx/s TASKS 405 (1152 thr), 13 run, 238 slp, 154 oth
lo 768b 768b
wlo1 888b 1Kb CPU% MEM% PID USER THR NI S
>59.3 0.0 10363 ajax 1 0 R stress -c
DefaultGateway 8ms 55.0 0.0 10359 ajax 1 0 R stress -c
53.3 0.0 10356 ajax 1 0 R stress -c
DISK I/O R/s W/s 51.4 0.0 10361 ajax 1 0 R stress -c
nvme0n1 0 59K 50.9 0.0 10365 ajax 1 0 R stress -c
nvme0n1p1 0 0 47.4 0.0 10366 ajax 1 0 R stress -c
nvme0n1p2 0 0 45.7 0.0 10364 ajax 1 0 R stress -c
nvme0n1p3 0 59K 44.3 0.0 10355 ajax 1 0 R stress -c
43.8 0.0 10360 ajax 1 0 R stress -c
FILE SYS Used Total 43.6 0.0 10358 ajax 1 0 R stress -c
/ 278G 930G 43.1 0.0 10357 ajax 1 0 R stress -c
SENSORS High CPU user mode
2024-10-05 11:23:40 CST7C 2024-10-05 11:23:12 (ongoing) - CPU_TOTAL (100.0)
```
However, the gnome system monitor thinks only `CPU1` is active, `CPU2-6`
are idle with 0% usage in resources panel. After some debugging, it
seems that gnome-system-monitor recognizes the active CPU count, but if
one CPU is parked, all subsequent CPU usage is reported as 0.
For example, if I only park cpu1, then gnome-system-monitor can only
recognize cpu0 usage (CPU1 on the panel); but if I park cpu15, usage of
cpu0-14 is displayed correctly.
** Affects: gnome-system-monitor (Ubuntu)
Importance: Undecided
Status: New
--
You received this bug notification because you are a member of Ubuntu
Desktop Bugs, which is subscribed to gnome-system-monitor in Ubuntu.
https://bugs.launchpad.net/bugs/2083729
Title:
Gnome system monitor reports incorrect CPU usage when a CPU is parked
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