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2024-09-17 - 01:36

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #7

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
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 50 highest latencies:
System rackcslot7s.osadl.org (updated Mon Sep 16, 2024 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
296144524350,30sleep126-21ksoftirqd/107:05:321
296189021100,12sleep02961889-21grep07:10:010
2961775210560,37sleep20-21swapper/207:09:402
296174428756,24sleep30-21swapper/307:09:173
30776262720,5sleep20-21swapper/212:35:162
30776262720,5sleep20-21swapper/212:35:152
162399720,10rtkit-daemon1775-21gvfs-afc-volume07:58:320
2961949996622,12cyclictest438-20systemd-journal12:21:223
2961949996424,11cyclictest3013291-21apt-get09:35:043
162399630,10rtkit-daemon1622-21rtkit-daemon11:15:441
2961949996221,13cyclictest3064384-21seq11:59:363
162399620,9rtkit-daemon1622-21rtkit-daemon10:36:301
162399620,9rtkit-daemon1622-21rtkit-daemon07:50:310
2961949996128,29cyclictest1753-21gnome-shell09:56:083
2961949996120,11cyclictest3003296-21sshd09:05:213
2961949996120,11cyclictest2978121-21wc07:55:023
2961946996021,11cyclictest2988912-21expr08:25:182
162399600,9rtkit-daemon1622-21rtkit-daemon09:48:450
2961949995925,12cyclictest3059146-21systemd-udevd11:44:283
2961949995817,11cyclictest3016167-21sed09:40:213
2961949995815,11cyclictest2992102-21acpi08:35:123
2961939995818,18cyclictest3007423-21which09:15:260
162399580,9rtkit-daemon1622-21rtkit-daemon12:01:520
2961949995719,7cyclictest2985251-21cpuspeed08:15:153
2961949995719,11cyclictest2997826-21latency08:50:213
2961946995726,26cyclictest34-21ksoftirqd/210:24:212
162399570,9rtkit-daemon1622-21rtkit-daemon12:16:151
30272042560,5sleep2331rcuc/210:12:122
30093292560,20sleep126-21ksoftirqd/109:20:311
29904892560,8chrt1753-21gnome-shell08:30:132
29904892560,8chrt1753-21gnome-shell08:30:132
296194999565,20cyclictest2978412-21cpuspeed_turbos07:55:143
296194999562,27cyclictest1753-21gnome-shell08:20:033
2961949995621,11cyclictest3035407-21interrupts10:35:213
2961949995619,10cyclictest3066043-21sed12:00:313
2961949995618,11cyclictest438-20systemd-journal09:25:003
2961949995615,11cyclictest2991186-21proc_pri08:30:273
2961949995615,11cyclictest2991186-21proc_pri08:30:263
2961949995612,13cyclictest438-20systemd-journal10:41:213
2961949995521,9cyclictest42-21ksoftirqd/312:14:233
2961949995521,9cyclictest1753-21gnome-shell09:50:143
2961949995520,7cyclictest1069-21runrttasks08:57:553
2961949995520,7cyclictest1069-21runrttasks08:57:553
2961949995519,9cyclictest2975367-21grep07:45:223
2961949995517,11cyclictest3030455-21cat10:20:313
2961949995516,12cyclictest3006070-21sshd09:11:223
2961949995514,12cyclictest3032241-21cut10:25:263
296194999551,24cyclictest3049691-21cat11:15:293
2961949995511,16cyclictest1753-21gnome-shell09:00:553
2961949995510,15cyclictest1753-21gnome-shell09:25:113
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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