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2026-06-19 - 13:13

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 Fri Jun 19, 2026 00:46:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
26847862389368,14sleep60-21swapper/619:08:0412
26846862372341,25sleep120-21swapper/1219:06:504
26849222368360,5sleep150-21swapper/1519:09:507
26846942366359,5sleep30-21swapper/319:06:589
26847412363342,14sleep50-21swapper/519:07:3111
26847112358337,14sleep00-21swapper/019:07:100
26848802353312,33sleep140-21swapper/1419:09:176
26846952353333,13sleep40-21swapper/419:06:5810
26848132352314,13sleep90-21swapper/919:08:2315
26846682347327,13sleep110-21swapper/1119:06:343
26847312346326,13sleep10-21swapper/119:07:271
26814262346324,14sleep70-21swapper/719:05:0813
26847132344323,14sleep20-21swapper/219:07:128
26846842344324,13sleep100-21swapper/1019:06:482
26848372343323,13sleep80-21swapper/819:08:3814
26849032338318,13sleep130-21swapper/1319:09:325
304451121100,0sleep80-21swapper/800:30:1114
268537799446,13cyclictest0-21swapper/1420:29:456
268537799446,13cyclictest0-21swapper/1420:29:456
268537799415,11cyclictest0-21swapper/1421:02:436
2685377994016,0cyclictest0-21swapper/1420:18:466
2685365993837,1cyclictest2996011-21kworker/u32:5+events_unbound00:30:182
268534999380,30cyclictest211rcu_preempt22:39:5311
2685349993535,0cyclictest0-21swapper/519:58:4811
2685349993528,4cyclictest0-21swapper/520:57:2911
268537799340,9cyclictest0-21swapper/1423:03:316
2685349993434,0cyclictest0-21swapper/500:35:0211
2685349993434,0cyclictest0-21swapper/500:23:1911
2685375993329,3cyclictest1774-21snmpd21:15:015
268536599330,30cyclictest0-21swapper/1019:10:142
2685352993330,3cyclictest1774-21snmpd00:39:0112
268534999335,28cyclictest0-21swapper/521:21:3711
2685349993333,0cyclictest0-21swapper/523:36:3811
2685349993333,0cyclictest0-21swapper/521:10:0311
2685349993333,0cyclictest0-21swapper/520:53:5811
2685349993333,0cyclictest0-21swapper/520:12:1511
268537799327,14cyclictest0-21swapper/1419:45:496
268535899320,29cyclictest0-21swapper/819:10:1514
2685352993226,6cyclictest1774-21snmpd21:52:1612
2685349993232,0cyclictest2676251-21kworker/5:0-events19:33:2511
2685349993232,0cyclictest0-21swapper/522:59:5811
2685349993232,0cyclictest0-21swapper/522:32:4311
2685349993232,0cyclictest0-21swapper/520:15:5211
2685345993229,3cyclictest1774-21snmpd20:10:0710
2685345993229,2cyclictest2865877-21mii-tool22:10:1510
2685377993130,1cyclictest0-21swapper/1423:28:516
2685377993130,1cyclictest0-21swapper/1423:28:516
268537599310,30cyclictest0-21swapper/1323:57:325
268537599310,30cyclictest0-21swapper/1322:20:165
2685371993130,1cyclictest0-21swapper/1221:47:464
268537199310,30cyclictest0-21swapper/1223:20:154
268537199310,30cyclictest0-21swapper/1223:20:154
268537199310,30cyclictest0-21swapper/1221:40:054
2685367993130,1cyclictest1774-21snmpd21:42:113
2685365993130,1cyclictest2997756-21kworker/10:2+events00:16:192
268536599310,30cyclictest0-21swapper/1020:51:052
2685361993129,1cyclictest1774-21snmpd22:33:4715
268535899310,30cyclictest0-21swapper/819:19:0914
2685352993127,4cyclictest1774-21snmpd00:08:2612
268535299310,30cyclictest0-21swapper/622:42:2912
268535299310,30cyclictest0-21swapper/600:10:1412
2685349993131,0cyclictest0-21swapper/519:16:3611
2685345993128,3cyclictest1774-21snmpd20:17:0010
268534099310,30cyclictest0-21swapper/222:27:178
268537799300,29cyclictest0-21swapper/1400:20:496
268537799300,1cyclictest0-21swapper/1422:45:326
2685375993029,1cyclictest1774-21snmpd19:42:215
2685375993027,3cyclictest0-21swapper/1321:50:015
2685365993029,1cyclictest2949388-21ethtool23:15:152
2685365993029,1cyclictest2666703-21kworker/10:1+events22:10:472
2685365993029,1cyclictest1774-21snmpd23:30:402
2685365993029,1cyclictest1774-21snmpd23:30:392
2685365993029,1cyclictest1774-21snmpd23:20:492
2685365993029,1cyclictest1774-21snmpd23:20:482
2685365993029,1cyclictest1774-21snmpd19:38:422
268536599300,29cyclictest0-21swapper/1000:05:042
2685361993029,1cyclictest2987870-21mii-tool23:45:1515
2685361993029,1cyclictest1774-21snmpd22:43:0215
2685361993029,1cyclictest1774-21snmpd00:24:4415
2685361993029,1cyclictest0-21swapper/923:11:2415
268536199300,1cyclictest0-21swapper/923:50:1615
2685358993029,1cyclictest0-21swapper/821:03:5714
268535899300,30cyclictest0-21swapper/821:34:4914
268535899300,1cyclictest0-21swapper/823:51:4814
2685355993029,1cyclictest1774-21snmpd21:13:0313
268535299300,1cyclictest0-21swapper/619:17:2112
2685349993029,1cyclictest3029306-21kworker/u32:0+events_unbound00:25:1711
2685349993029,1cyclictest1774-21snmpd21:49:5811
268534999300,30cyclictest0-21swapper/500:19:3511
2685345993029,1cyclictest1774-21snmpd22:42:0910
2685345993029,1cyclictest1774-21snmpd22:01:1710
2685340993029,1cyclictest0-21swapper/222:14:318
268534099300,30cyclictest0-21swapper/221:41:258
268534099300,0cyclictest0-21swapper/222:00:418
2685335993029,1cyclictest2994280-21mii-tool23:50:151
2685332993029,1cyclictest1774-21snmpd23:05:260
268533299300,30cyclictest0-21swapper/000:05:560
268533299300,1cyclictest0-21swapper/020:38:150
268533299300,1cyclictest0-21swapper/019:21:570
2685381992928,1cyclictest2865894-21ethtool22:10:157
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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