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2026-06-04 - 02:15

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #4

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 here to display the system's profile data or here to proceed to next system.
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 100 highest latencies:
System rack0slot4s.osadl.org (updated Thu Jun 04, 2026 00:46:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
13345692389368,14sleep60-21swapper/619:06:2412
13324492374355,12sleep10-21swapper/119:05:151
13313722367328,13sleep100-21swapper/1019:05:082
13313732365324,12sleep110-21swapper/1119:05:093
13348382361319,14sleep80-21swapper/819:09:2314
13346422361322,13sleep130-21swapper/1319:07:195
13346822360340,13sleep140-21swapper/1419:07:536
13347152358339,12sleep20-21swapper/219:08:138
13347822350329,14sleep70-21swapper/719:08:5013
13347102350330,13sleep150-21swapper/1519:08:107
13348342349329,13sleep40-21swapper/419:09:1910
13345682348328,13sleep50-21swapper/519:06:2211
13345472348329,12sleep30-21swapper/319:06:059
13345282346326,13sleep90-21swapper/919:05:5515
13313742346327,13sleep120-21swapper/1219:05:094
13346482345324,14sleep00-21swapper/019:07:230
1335363994036,3cyclictest1490697-21kworker/u32:2+flush-259:023:11:108
133536399366,29cyclictest1383172-21kworker/u32:2+events_unbound21:23:028
133536399366,29cyclictest1383172-21kworker/u32:2+events_unbound21:23:028
1335363993430,2cyclictest1573057-21kworker/u32:5+flush-259:023:51:008
133536399330,31cyclictest782-21systemd-journal00:14:148
133536399330,30cyclictest1365370-21ntpq20:00:148
133536399330,0cyclictest0-21swapper/221:14:268
133535799330,30cyclictest0-21swapper/023:47:480
133538299320,0cyclictest0-21swapper/800:15:1514
1335363993229,2cyclictest1594151-21ssh23:41:288
1335363993227,3cyclictest1421994-21kworker/u32:4+events_unbound22:07:088
133536399321,30cyclictest1361009-21kworker/u32:3+flush-259:020:10:118
133536399320,29cyclictest1548699-21ssh23:05:468
133536399320,29cyclictest1516571-21ssh22:40:528
133536399320,29cyclictest0-21swapper/223:57:438
133536399320,29cyclictest0-21swapper/223:45:328
133536399320,29cyclictest0-21swapper/223:30:008
133536399320,29cyclictest0-21swapper/223:25:268
133536399320,29cyclictest0-21swapper/223:21:008
133536399320,29cyclictest0-21swapper/223:17:428
133536399320,29cyclictest0-21swapper/223:01:128
133536399320,29cyclictest0-21swapper/222:58:348
133536399320,29cyclictest0-21swapper/222:51:188
133536399320,29cyclictest0-21swapper/222:46:568
133536399320,29cyclictest0-21swapper/222:37:548
133536399320,29cyclictest0-21swapper/222:30:388
133536399320,29cyclictest0-21swapper/222:21:008
133536399320,29cyclictest0-21swapper/222:15:588
133536399320,29cyclictest0-21swapper/222:11:148
133536399320,29cyclictest0-21swapper/222:00:408
133536399320,29cyclictest0-21swapper/221:50:498
133536399320,29cyclictest0-21swapper/221:49:488
133536399320,29cyclictest0-21swapper/221:44:068
133536399320,29cyclictest0-21swapper/221:39:188
133536399320,29cyclictest0-21swapper/221:16:588
133536399320,29cyclictest0-21swapper/221:08:238
133536399320,29cyclictest0-21swapper/221:03:148
133536399320,29cyclictest0-21swapper/220:55:328
133536399320,29cyclictest0-21swapper/220:54:248
133536399320,29cyclictest0-21swapper/220:47:028
133536399320,29cyclictest0-21swapper/220:39:348
133536399320,29cyclictest0-21swapper/220:25:428
133536399320,29cyclictest0-21swapper/220:20:478
133536399320,29cyclictest0-21swapper/220:16:348
133536399320,29cyclictest0-21swapper/219:58:048
133536399320,29cyclictest0-21swapper/219:45:168
133536399320,29cyclictest0-21swapper/219:40:308
133536399320,29cyclictest0-21swapper/219:35:208
133536399320,29cyclictest0-21swapper/219:30:308
133536399320,29cyclictest0-21swapper/219:23:448
133536399320,29cyclictest0-21swapper/219:11:448
133536399320,29cyclictest0-21swapper/200:36:088
133536399320,29cyclictest0-21swapper/200:36:088
133536399320,29cyclictest0-21swapper/200:31:478
133536399320,29cyclictest0-21swapper/200:31:468
133536399320,29cyclictest0-21swapper/200:25:368
133536399320,29cyclictest0-21swapper/200:25:368
133536399320,29cyclictest0-21swapper/200:16:088
133535799320,31cyclictest0-21swapper/020:36:130
133535799320,30cyclictest0-21swapper/021:05:260
133535799320,29cyclictest0-21swapper/023:50:140
133539799310,30cyclictest0-21swapper/1323:10:145
133539799310,30cyclictest0-21swapper/1322:49:205
133539799310,30cyclictest0-21swapper/1319:35:125
1335390993129,2cyclictest1774-21snmpd19:15:213
1335390993128,3cyclictest1774-21snmpd22:30:533
133538499310,30cyclictest0-21swapper/920:30:0815
133538499310,30cyclictest0-21swapper/919:50:1015
1335376993130,1cyclictest1391148-21ethtool20:50:1112
133537699310,30cyclictest0-21swapper/622:50:5312
1335372993129,2cyclictest0-21swapper/523:37:3311
133537299310,30cyclictest0-21swapper/521:01:3111
133536699310,30cyclictest0-21swapper/321:46:009
133536699310,30cyclictest0-21swapper/320:31:079
133536399310,28cyclictest0-21swapper/222:25:068
133536399310,28cyclictest0-21swapper/221:59:328
133536399310,28cyclictest0-21swapper/221:31:048
133536399310,28cyclictest0-21swapper/221:29:488
133536399310,28cyclictest0-21swapper/221:29:488
133536399310,28cyclictest0-21swapper/220:30:548
133536399310,28cyclictest0-21swapper/220:05:268
133536399310,28cyclictest0-21swapper/219:51:528
133536399310,28cyclictest0-21swapper/219:28:248
133536399310,28cyclictest0-21swapper/219:15:188
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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