You are here: Home / Projects / OSADL QA Farm Real-time / Latency plots / 
2023-01-29 - 07:40

x86 Intel Core i3-8145UE @2200 MHz, Linux 5.10.27-rt36 (Profile)

Latency plot of system in rack #e, slot #5
Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Command line: cyclictest -l100000000 -m -Sp99 -i200 -h400 -q
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rackeslot5.osadl.org (updated Sun Jan 29, 2023 00:44:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
29778993127,4cyclictest0-21swapper/223:55:302
29777993128,2cyclictest7109-21idleruntime-cro20:40:011
29779993028,1cyclictest6924-21apt-key22:30:003
29779993028,1cyclictest0-21swapper/321:50:183
2977999300,29cyclictest21184-21diskmemload23:31:263
2977999300,29cyclictest14607-21cron21:35:003
2977999300,1cyclictest21184-21diskmemload23:40:233
2977999300,1cyclictest0-21swapper/321:45:273
2977899300,29cyclictest21184-21diskmemload23:06:582
2977899300,29cyclictest21184-21diskmemload22:02:092
2977899300,29cyclictest21184-21diskmemload21:50:322
2977899300,1cyclictest561-21dbus-daemon19:25:002
29777993029,1cyclictest211rcuc/122:40:011
29777993028,1cyclictest0-21swapper/123:15:201
2977799300,29cyclictest21184-21diskmemload22:30:261
2977799300,29cyclictest21184-21diskmemload21:12:031
2977799300,29cyclictest0-21swapper/123:27:191
2977799300,29cyclictest0-21swapper/122:53:231
2977799300,29cyclictest0-21swapper/121:20:261
2977799300,1cyclictest211rcuc/121:50:261
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional