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2026-03-26 - 10:10

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #6

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 rack0slot6s.osadl.org (updated Thu Mar 26, 2026 00:46:04)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
39082322233214,12sleep160-21swapper/1619:07:588
39082322233214,12sleep160-21swapper/1619:07:588
39079622233213,12sleep70-21swapper/719:05:4917
39079622233213,12sleep70-21swapper/719:05:4917
39082822230210,13sleep30-21swapper/319:08:2613
39082822230210,13sleep30-21swapper/319:08:2513
39080392225206,12sleep40-21swapper/419:06:2714
39080392225206,12sleep40-21swapper/419:06:2614
39080522223203,13sleep130-21swapper/1319:06:365
39080522223203,13sleep130-21swapper/1319:06:355
39082272221202,12sleep140-21swapper/1419:07:566
39082272221202,12sleep140-21swapper/1419:07:566
39048972219200,12sleep00-21swapper/019:05:010
39048972219200,12sleep00-21swapper/019:05:010
39082412218198,12sleep10-21swapper/119:08:031
39082412218198,12sleep10-21swapper/119:08:031
39079842217197,12sleep190-21swapper/1919:06:0211
39079842217197,12sleep190-21swapper/1919:06:0111
39082912212190,14sleep80-21swapper/819:08:3018
39082912212190,14sleep80-21swapper/819:08:3018
39084322209190,12sleep50-21swapper/519:09:4815
39084322209190,12sleep50-21swapper/519:09:4815
39083142209191,11sleep20-21swapper/219:08:4512
39083142209191,11sleep20-21swapper/219:08:4512
39082962209190,12sleep110-21swapper/1119:08:343
39082962209190,12sleep110-21swapper/1119:08:343
39080142200181,12sleep100-21swapper/1019:06:132
39080142200181,12sleep100-21swapper/1019:06:122
39081422114106,5sleep180-21swapper/1819:07:2110
39081422114106,5sleep180-21swapper/1819:07:2010
39081212109101,5sleep60-21swapper/619:07:0816
39081212109101,5sleep60-21swapper/619:07:0816
390794128161,13sleep170-21swapper/1719:05:399
390794128161,13sleep170-21swapper/1719:05:399
390846227859,12sleep150-21swapper/1519:09:587
390846227859,12sleep150-21swapper/1519:09:587
390797127455,12sleep120-21swapper/1219:05:554
390797127455,12sleep120-21swapper/1219:05:544
390801326848,12sleep90-21swapper/919:06:1219
390801326848,12sleep90-21swapper/919:06:1119
3909008995928,30cyclictest0-21swapper/619:24:5416
3909018995828,30cyclictest0-21swapper/919:24:5319
3909002995532,22cyclictest1606166-21gmain23:17:5714
3909018995323,1cyclictest0-21swapper/921:07:1819
3909044995252,0cyclictest0-21swapper/1723:27:349
3908988995248,2cyclictest3336626-21cosmic-comp23:52:060
3908988995151,0cyclictest0-21swapper/023:32:450
218999500,0ntpd0-21swapper/521:46:5815
3908988994926,1cyclictest16-21ksoftirqd/022:26:190
3909044994824,0cyclictest0-21swapper/1719:14:479
3909044994824,0cyclictest0-21swapper/1719:14:469
3909022994828,16cyclictest472370-21CPU2
3909012994848,0cyclictest0-21swapper/723:27:3517
3909050994614,29cyclictest39722751kworker/u80:4+i91520:51:0011
3909044994623,22cyclictest0-21swapper/1722:23:279
3909044994623,22cyclictest0-21swapper/1722:23:269
3909018994611,28cyclictest0-21swapper/920:51:1619
3909012994628,18cyclictest0-21swapper/723:32:4517
3909047994524,21cyclictest0-21swapper/1800:14:5010
3909047994515,27cyclictest39034461kworker/u80:2+i91519:27:5910
3909026994543,1cyclictest0-21swapper/1122:53:413
3909018994514,29cyclictest1031irq_work/920:01:1219
3909012994544,0cyclictest0-21swapper/700:28:0317
3909012994521,0cyclictest0-21swapper/719:14:4717
3909012994521,0cyclictest0-21swapper/719:14:4617
3908988994518,5cyclictest16-21ksoftirqd/000:19:580
3909047994414,29cyclictest1861irq_work/1820:53:4710
3909042994411,27cyclictest0-21swapper/1600:12:468
3909022994413,26cyclictest3345156-21firefox20:13:102
3909008994411,26cyclictest0-21swapper/620:25:3716
390900599442,41cyclictest0-21swapper/520:39:1115
3909002994442,1cyclictest0-21swapper/423:10:3114
3909050994313,29cyclictest1951irq_work/1922:15:2311
3909050994313,29cyclictest1951irq_work/1922:15:2311
3909042994315,27cyclictest41145701kworker/u80:2+i91523:48:468
3909042994315,26cyclictest0-21swapper/1621:16:178
3909037994311,26cyclictest0-21swapper/1519:35:467
3909034994312,27cyclictest40478021kworker/u80:1+i91500:12:316
3909032994310,26cyclictest0-21swapper/1319:46:145
3909028994314,28cyclictest1321irq_work/1223:26:244
3909028994314,26cyclictest1321irq_work/1222:08:444
3909028994313,28cyclictest4041258-21kworker/u80:3+i91521:52:244
3909026994324,0cyclictest0-21swapper/1121:52:193
3909022994310,26cyclictest0-21swapper/1019:45:132
3909018994314,28cyclictest1031irq_work/920:44:2619
3909018994312,29cyclictest1031irq_work/923:48:3519
3909018994312,29cyclictest1031irq_work/919:56:3019
3909018994311,29cyclictest39303781kworker/u80:5+i91519:35:3419
3909016994314,28cyclictest41012401kworker/u80:0+i91523:12:5918
3908998994339,3cyclictest53-21ksoftirqd/322:10:0513
390899299432,16cyclictest341ktimers/119:11:501
390899299432,16cyclictest341ktimers/119:11:491
3908988994317,25cyclictest0-21swapper/022:45:150
3909050994214,28cyclictest1951irq_work/1900:37:3911
390904799429,27cyclictest0-21swapper/1823:33:0310
3909044994227,11cyclictest472370-21CPU9
3909044994214,27cyclictest1771irq_work/1723:01:009
3909044994214,27cyclictest1771irq_work/1700:34:189
3909042994210,26cyclictest0-21swapper/1619:10:538
3909042994210,26cyclictest0-21swapper/1619:10:528
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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