You are here: Home / Projects / OSADL QA Farm Real-time / Latency plots / 
2022-10-03 - 14:22

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 Mon Oct 03, 2022 00:44:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
660499310,30cyclictest6161-21/usr/sbin/munin23:19:533
660499310,30cyclictest544-21dbus-daemon20:20:013
660499310,30cyclictest3186-21awk20:10:003
6603993128,0cyclictest0-21swapper/222:53:112
660399310,30cyclictest296-21systemd-journal20:25:002
6601993129,1cyclictest15376-21ntp_states21:24:540
660199310,30cyclictest0-21swapper/023:29:080
6604993028,1cyclictest0-21swapper/322:05:003
660499300,29cyclictest615-21diskmemload22:15:583
660499300,29cyclictest12315-21munin-run23:24:593
660499300,29cyclictest0-21swapper/319:49:493
660499300,1cyclictest615-21diskmemload23:48:083
660499300,1cyclictest615-21diskmemload23:44:483
6603993028,2cyclictest0-21swapper/221:52:572
660399301,0cyclictest0-21swapper/223:23:252
660399300,29cyclictest615-21diskmemload23:55:212
660399300,29cyclictest615-21diskmemload23:46:372
660399300,29cyclictest31394-21apt-get23:44:472
660399300,29cyclictest11023-21munin-run21:20:002
660399300,29cyclictest0-21swapper/221:36:312
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional