Performance issue with psusensor / dbus-sensors
peterlundgren at google.com
Sat Feb 15 09:14:59 AEDT 2020
We're running into some occasional and hard to reproduce performance issues
with sensors on the entity-manager/dbus-sensors/intel-ipmi-oem software
stack. I don't have much concrete to say on the subject, but I want to put
a feeler out to see if anyone else has seen similar issues. Here's what we
think so far:
Complaints range from IPMI sensor reads being slower than normal to sensors
Josh got access to one machine in a bad state and observed this:
1. All the I2C buses were working normally. i2cdetect ran successfully
on each bus.
2. hwmon was working fine. He wrote a shell script to read all of the
*_input sysfs files and could read every sensor in the system in 3 seconds.
3. psusensor was running.
4. busctl --no-pager monitor | grep -i PropertiesChanged shows no
traffic. On a healthy system, it shows many updates per second. No obvious
error messages in journalctl --no-pager -f.
5. Restarting psusensor alleviates the problem.
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