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2025-10-13 - 14:08

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #8

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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  Congatec
Click here to display the system's profile data.
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 rackeslot8s.osadl.org (updated Mon Oct 13, 2025 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
318157299752748,3cyclictest3502473-21kworker/1:0+events23:46:251
318157299746742,3cyclictest3502473-21kworker/1:0+events23:50:431
318157899742738,3cyclictest3340251-21kworker/3:0+events21:42:323
318157299742738,3cyclictest4181241-21kworker/1:0+events19:19:161
318157299742738,3cyclictest3502473-21kworker/1:0+events23:56:571
318157899741736,4cyclictest1083465-21kworker/3:1+events20:20:223
318157899733729,3cyclictest1083465-21kworker/3:1+events21:03:413
318157899733727,5cyclictest1083465-21kworker/3:1+events19:30:233
318157899733726,6cyclictest1083465-21kworker/3:1+events19:55:233
318157899730726,3cyclictest3564695-21kworker/3:2+events00:28:253
318157899730726,3cyclictest3471469-21kworker/3:0+events23:28:583
318157899729724,4cyclictest3365196-21turbostat21:39:563
318157899729722,6cyclictest1083465-21kworker/3:1+events21:12:423
318157899727724,2cyclictest3340251-21kworker/3:0+events21:19:193
318157899726717,7cyclictest1083465-21kworker/3:1+events21:05:203
318157899726717,7cyclictest1083465-21kworker/3:1+events21:05:203
318157899725720,4cyclictest3352774-21turbostat21:29:563
318157899724718,5cyclictest1083465-21kworker/3:1+events20:34:173
318156999724720,3cyclictest3402579-21kworker/0:2+events22:30:210
318157899723718,4cyclictest3539792-21turbostat23:59:553
318157899723718,4cyclictest1083465-21kworker/3:1+events19:50:223
318157899722716,5cyclictest1083465-21kworker/3:1+events20:45:213
318157899721717,3cyclictest3471469-21kworker/3:0+events23:14:503
318157899721717,3cyclictest3471469-21kworker/3:0+events23:14:493
318157899720714,5cyclictest3471469-21kworker/3:0+events23:30:223
318157899719716,2cyclictest3308910-21turbostat20:54:563
318157899719714,4cyclictest3258854-21turbostat20:14:563
318157899717713,3cyclictest3564695-21kworker/3:2+events00:19:203
318157899716710,5cyclictest3227743-21turbostat19:49:553
318157899713706,6cyclictest1083465-21kworker/3:1+events20:35:223
318157899712707,4cyclictest3490059-21turbostat23:19:553
318157899712707,4cyclictest3340251-21kworker/3:0+events21:20:213
318157899712706,5cyclictest3340251-21kworker/3:0+events21:55:213
318157899712706,5cyclictest1083465-21kworker/3:1+events19:22:323
318157899711709,1cyclictest3471469-21kworker/3:0+events00:04:533
318157899708704,3cyclictest1083465-21kworker/3:1+events19:36:173
318157899707705,1cyclictest3471469-21kworker/3:0+events00:13:133
318157899705702,2cyclictest1083465-21kworker/3:1+events20:56:273
318157899705701,3cyclictest3471469-21kworker/3:0+events23:24:443
318157899705700,4cyclictest3252644-21turbostat20:09:553
318157899704697,6cyclictest3446628-21turbostat22:44:543
318156999703700,2cyclictest3452843-21turbostat22:49:550
318157899702697,4cyclictest3471469-21kworker/3:0+events23:40:213
318157899702696,5cyclictest1083465-21kworker/3:1+events20:15:233
318157899700698,1cyclictest3396168-21kworker/3:2+events22:14:523
318157899700695,4cyclictest3340251-21kworker/3:0+events21:45:223
318157899699695,3cyclictest3564695-21kworker/3:2+events00:39:093
318157899699694,4cyclictest3340251-21kworker/3:0+events22:00:533
318157899699694,4cyclictest1083465-21kworker/3:1+events20:00:223
318157899699693,5cyclictest3396168-21kworker/3:2+events22:20:203
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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