amanusk
commented
5 years ago s-tui is actually using psutil to gather (most of) the information, including frequency, so there shouldn't be a big difference psutil, in turn, reads this information from /proc/cpuinfo (most of the time, unless it is unavailable), so that to shouldn't differ too much. Difference could be the result of timing, the reported frequency can change slightly between measurements.
Also, how s-tui handles systems with more than one CPU?
psutil has an option to report average CPU usage. It basically takes the sum of all reported CPU cores and divides by the number of cores. This is what s-tui uses in 0.8.3.
In version 1.0, which is currently in beta, there is a separate graph for each core. You can try it by running from source.
jirka-h
Step 1: Describe your environment
Step 2: Describe the problem:
Observed Results:
Wrong CPU frequency readings:
Please compare /proc/cpuinfo, Python's psutil output and "s-tui -t" ouput:
$./cpu_freq.py ; grep -i Mhz /proc/cpuinfo ; s-tui -t scpufreq(current=2700.0278749999998, min=400.0, max=4200.0) cpu MHz : 2700.046 cpu MHz : 2699.998 cpu MHz : 2700.007 cpu MHz : 2700.000 cpu MHz : 2700.027 cpu MHz : 2699.999 cpu MHz : 2700.002 cpu MHz : 2700.010
Top Freq: 4200 MHz, Cur Freq: 2500.0 MHz, Perf Lost: 0 (N/A) run sudo, Max Temp: 67.0 C, Cur Temp: 67.0 C, Utilization: 62.5 %, Max Power: 17.0 W, Cur Power: 16.5 W, Fan: 3940.0 RPM,
s-tui -t reports 2500.0 MHz, which is a completely different value from what /proc/cpuinfo and Python's psutil report.
Could you please check why we have this discrepancy?
Also, how s-tui handles systems with more than one CPU? My laptop has 4 cores. (8 CPUs with hyperthreading enabled). Each CPU can run at a different frequency.
For the reference, here is the Python's psutil script: $more ./cpu_freq.py
!/usr/bin/env python2
import psutil print(psutil.cpu_freq())
[1] https://ark.intel.com/content/www/us/en/ark/products/124968/intel-core-i7-8650u-processor-8m-cache-up-to-4-20-ghz.html