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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 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 792 highest latencies:
System rackcslot7s.osadl.org (updated Fri Jan 23, 2026 00:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
278078822790,9sleep32780785-21sh19:10:013
278007822240,19sleep00-21swapper/019:05:230
284624021070,7sleep10-21swapper/122:15:031
197399990,5rtkit-daemon0-21swapper/223:21:502
197399940,8rtkit-daemon1972-21rtkit-daemon21:04:003
28568972920,4sleep20-21swapper/222:45:012
197399850,9rtkit-daemon1972-21rtkit-daemon20:08:563
197399840,9rtkit-daemon1972-21rtkit-daemon20:27:493
197399840,8rtkit-daemon1972-21rtkit-daemon20:38:293
197399830,9rtkit-daemon1972-21rtkit-daemon20:56:073
197399830,9rtkit-daemon1972-21rtkit-daemon20:41:423
197399830,9rtkit-daemon1972-21rtkit-daemon19:56:373
197399830,8rtkit-daemon1972-21rtkit-daemon20:51:213
197399830,6rtkit-daemon1972-21rtkit-daemon00:26:433
28042712820,5sleep10-21swapper/120:15:141
28042712820,5sleep10-21swapper/120:15:141
197399820,8rtkit-daemon1972-21rtkit-daemon20:15:523
197399820,8rtkit-daemon1972-21rtkit-daemon20:15:523
197399780,4rtkit-daemon0-21swapper/319:52:212
27993512760,5sleep30-21swapper/320:00:153
278091899752,10cyclictest2069-21gnome-shell20:58:591
278091699742,16cyclictest2069-21gnome-shell19:18:590
2780918997215,37cyclictest2807725-21latency_hist20:25:001
2780918997215,37cyclictest2807725-21latency_hist20:25:001
278044026647,13sleep10-21swapper/119:05:411
278092199642,6cyclictest4497-21PK-Backend23:12:582
2780918996240,19cyclictest58750irq/126-i91520:53:581
2780916996240,19cyclictest0-21swapper/020:08:580
278064426140,13sleep20-21swapper/219:08:202
278091699602,16cyclictest2069-21gnome-shell23:24:580
278092199592,53cyclictest2069-21gnome-shell22:28:592
278092199592,53cyclictest2069-21gnome-shell22:28:592
278091899591,53cyclictest2802086-21seq20:08:491
278091699592,52cyclictest2069-21gnome-shell20:04:580
278092199582,14cyclictest2069-21gnome-shell21:42:592
278091899582,51cyclictest2069-21gnome-shell23:22:581
278091899582,51cyclictest2069-21gnome-shell20:12:591
2780918995820,33cyclictest438-20systemd-journal23:38:381
278091699582,52cyclictest2069-21gnome-shell00:17:580
278091699581,53cyclictest2069-21gnome-shell19:12:590
278091699581,53cyclictest2069-21gnome-shell19:12:580
278091899572,51cyclictest2069-21gnome-shell00:23:591
28716692560,5sleep2331rcuc/223:25:192
2780924995633,18cyclictest2069-21gnome-shell22:59:583
2780918995626,26cyclictest2069-21gnome-shell23:25:591
278091899562,49cyclictest2793700-21cat19:45:021
2780918995617,34cyclictest2873934-21cat23:30:271
2780916995639,13cyclictest2069-21gnome-shell21:34:590
278091699562,49cyclictest2069-21gnome-shell21:18:590
2780916995620,31cyclictest2846161-21find22:15:020
2780916995612,22cyclictest28554552cpuspeed_turbos22:40:120
2780924995522,13cyclictest141rcu_preempt20:21:593
2780924995522,13cyclictest141rcu_preempt20:21:593
278092199552,49cyclictest2069-21gnome-shell22:17:582
278092199552,49cyclictest2069-21gnome-shell00:03:592
278092199552,12cyclictest2069-21gnome-shell21:46:592
278091899555,46cyclictest231irq_work/119:37:591
2780918995514,36cyclictest2894461-21needreboot00:30:251
278091699552,48cyclictest2069-21gnome-shell23:30:580
2780924995438,12cyclictest2069-21gnome-shell00:07:593
278092199542,17cyclictest2895005-21taskset00:31:582
278091899545,45cyclictest231irq_work/123:41:591
2780918995442,9cyclictest26-21ksoftirqd/121:56:591
278091899542,9cyclictest2069-21gnome-shell23:18:581
278091899542,47cyclictest2069-21gnome-shell19:11:591
278091899542,47cyclictest2069-21gnome-shell19:11:591
2780918995414,36cyclictest2799628-21cat20:00:221
2780918995414,35cyclictest2783165-21wc19:15:061
278091699542,48cyclictest2069-21gnome-shell20:53:590
278091699542,10cyclictest2069-21gnome-shell23:47:590
2780916995415,34cyclictest2792341-21expr19:40:130
278091699541,12cyclictest2818117-21kworker/0:021:06:590
2780921995338,11cyclictest2069-21gnome-shell21:36:582
2780921995338,11cyclictest2069-21gnome-shell21:36:582
278092199532,10cyclictest2069-21gnome-shell22:37:582
278092199532,10cyclictest2069-21gnome-shell22:34:592
278091899536,42cyclictest2813130-21/usr/sbin/munin20:40:321
278091899534,46cyclictest231irq_work/120:35:591
278091899534,46cyclictest231irq_work/119:59:581
278091899534,45cyclictest231irq_work/120:26:591
2780918995343,7cyclictest26-21ksoftirqd/121:17:581
2780918995343,7cyclictest26-21ksoftirqd/119:22:591
278091899532,46cyclictest2867430-21cut23:15:031
2780918995320,29cyclictest2830229-21latency_hist21:30:021
2780918995320,29cyclictest2794021-21cstates19:45:141
2780918995320,28cyclictest2841807-21switchtime22:00:301
2780918995320,28cyclictest2841807-21switchtime22:00:291
2780918995315,33cyclictest2878397-21expr23:45:121
2780918995313,35cyclictest2815011-21cpuspeed_turbos20:45:131
2780916995338,11cyclictest2069-21gnome-shell00:25:580
278091699532,10cyclictest2069-21gnome-shell19:50:590
278092499522,46cyclictest2069-21gnome-shell00:12:593
278092199522,8cyclictest1054-21snmpd23:16:592
278092199522,10cyclictest2069-21gnome-shell22:24:582
278092199522,10cyclictest2069-21gnome-shell00:08:582
2780918995238,11cyclictest26-21ksoftirqd/100:35:581
278091899522,8cyclictest231irq_work/100:27:591
278091899522,46cyclictest231irq_work/122:50:581
278091899522,46cyclictest231irq_work/122:43:591
278091899522,46cyclictest231irq_work/122:05:591
2780918995213,10cyclictest2824935-21seq21:13:531
278091699522,46cyclictest2807479-40lsb_release20:22:590
278091699522,46cyclictest2807479-40lsb_release20:22:580
197399520,8rtkit-daemon1972-21rtkit-daemon20:27:422
278092499512,45cyclictest2069-21gnome-shell21:44:593
278092499512,45cyclictest2069-21gnome-shell21:37:593
278092499512,45cyclictest2069-21gnome-shell21:37:593
278092199512,6cyclictest0-21swapper/221:16:592
2780918995141,7cyclictest26-21ksoftirqd/122:46:581
2780918995141,7cyclictest26-21ksoftirqd/119:32:591
278091899513,45cyclictest231irq_work/120:31:591
2780918995119,29cyclictest1137-21runrttasks23:58:251
2780918995115,31cyclictest2787732-21switchtime19:25:271
2780916995140,7cyclictest2069-21gnome-shell22:09:580
2780916995134,13cyclictest2069-21gnome-shell19:49:590
278091699512,8cyclictest0-21swapper/023:50:580
278091699512,7cyclictest0-21swapper/020:25:580
278091699512,46cyclictest2784610-21kworker/0:220:31:590
278091699512,46cyclictest0-21swapper/023:41:590
2780916995119,28cyclictest2829185-21basename21:25:210
2780916995118,28cyclictest2802745-21expr20:10:160
2780916995118,28cyclictest2790853-21cut19:35:200
2780916995116,30cyclictest2859295-21cut22:50:210
2780916995115,31cyclictest2785622-21cut19:20:210
2780916995114,26cyclictest2863333-21cat23:00:320
278091899503,43cyclictest231irq_work/121:23:591
278091899502,44cyclictest231irq_work/122:21:581
2780918995016,30cyclictest2832450-21cstates21:35:151
2780918995016,30cyclictest2832450-21cstates21:35:141
278091699508,37cyclictest1975-21dbus-daemon23:59:590
278091699503,43cyclictest2895407-21sort00:35:020
2780916995028,16cyclictest2069-21gnome-shell22:02:590
2780916995028,16cyclictest2069-21gnome-shell22:02:590
278091699502,45cyclictest0-21swapper/023:38:590
278091699502,45cyclictest0-21swapper/019:59:590
278091699502,44cyclictest4497-21PK-Backend00:20:580
278091699502,44cyclictest0-21swapper/023:29:580
278091699502,44cyclictest0-21swapper/020:42:590
2780916995015,30cyclictest2839707-21wc21:55:220
2780916995014,31cyclictest2837700-21expr21:50:130
2780916995013,32cyclictest2834990-21grep21:40:290
2780924994936,9cyclictest2069-21gnome-shell22:32:583
278092499491,15cyclictest2891796-21sh00:25:003
278092199497,37cyclictest2069-21gnome-shell21:52:592
278092199497,37cyclictest2069-21gnome-shell21:10:582
2780918994938,8cyclictest26-21ksoftirqd/121:46:591
2780918994916,29cyclictest4497-21PK-Backend22:32:211
2780918994916,29cyclictest4497-21PK-Backend21:41:501
2780916994941,5cyclictest0-21swapper/021:13:590
278091699493,41cyclictest2812132-21taskset20:35:250
278091699492,44cyclictest0-21swapper/023:18:590
278091699492,44cyclictest0-21swapper/020:15:590
278091699492,44cyclictest0-21swapper/020:15:590
278091699492,44cyclictest0-21swapper/019:29:590
2780916994916,29cyclictest2850462-21missed_timers22:25:220
2780916994916,29cyclictest2850462-21missed_timers22:25:210
2780924994836,8cyclictest2069-21gnome-shell19:53:593
278092199489,34cyclictest2069-21gnome-shell22:57:592
278092199486,37cyclictest2069-21gnome-shell21:55:582
278091899484,39cyclictest2890294-21latency_hist00:20:021
2780918994839,6cyclictest231irq_work/121:30:591
278091899481,6cyclictest4497-21PK-Backend22:29:581
278091899481,6cyclictest4497-21PK-Backend22:29:581
278091899481,43cyclictest4497-21PK-Backend21:08:591
2780918994814,29cyclictest1137-21runrttasks23:50:071
2780918994812,33cyclictest2886592-21cron00:10:001
2780916994840,5cyclictest0-21swapper/022:46:590
2780916994837,7cyclictest2780908-21cyclictest21:39:590
2780916994837,7cyclictest2780908-21cyclictest21:39:590
278091699482,6cyclictest0-21swapper/000:37:590
278091699482,44cyclictest0-21swapper/020:57:580
2780916994817,26cyclictest2852186-21cat22:30:220
278092499477,35cyclictest2069-21gnome-shell22:29:593
278092499477,35cyclictest2069-21gnome-shell22:29:593
278092499472,5cyclictest4497-21PK-Backend19:44:593
278092499472,43cyclictest0-21swapper/321:50:583
278092499471,42cyclictest4497-21PK-Backend23:52:593
278092499471,42cyclictest4497-21PK-Backend00:16:593
278092199477,35cyclictest2069-21gnome-shell21:08:582
2780921994740,5cyclictest0-21swapper/219:31:592
278092199472,5cyclictest0-21swapper/220:00:592
278092199472,5cyclictest0-21swapper/219:19:582
278092199472,42cyclictest0-21swapper/222:48:582
278091899472,17cyclictest2854878-40lsb_release22:38:011
2780918994716,28cyclictest4497-21PK-Backend22:13:541
2780918994714,29cyclictest4497-21PK-Backend23:02:401
278091699479,12cyclictest438-20systemd-journal21:23:370
2780916994739,5cyclictest4497-21PK-Backend22:16:590
2780916994736,7cyclictest2069-21gnome-shell21:00:590
2780916994714,29cyclictest2867241-21latency_hist23:15:020
2780916994714,28cyclictest2837161-21latency_hist21:50:010
28024462460,8chrt4497-21PK-Backend20:10:123
2780924994622,12cyclictest42-21ksoftirqd/300:38:373
278092499461,42cyclictest4497-21PK-Backend21:59:593
278092499461,41cyclictest4497-21PK-Backend00:31:583
2780921994640,4cyclictest0-21swapper/200:15:592
2780921994636,7cyclictest2069-21gnome-shell23:05:582
278092199462,5cyclictest0-21swapper/222:08:592
278092199462,5cyclictest0-21swapper/222:01:592
278092199462,5cyclictest0-21swapper/222:01:582
278092199462,41cyclictest0-21swapper/223:00:592
278092199462,41cyclictest0-21swapper/219:27:592
278092199461,5cyclictest4497-21PK-Backend00:11:582
2780916994615,27cyclictest2886662-21latency_hist00:10:020
28052722450,5chrt0-21swapper/220:15:302
28052722450,5chrt0-21swapper/220:15:302
2780924994537,5cyclictest4497-21PK-Backend21:33:583
278092499452,41cyclictest0-21swapper/323:33:583
278092499451,41cyclictest4497-21PK-Backend23:26:583
278092499451,41cyclictest4497-21PK-Backend23:17:593
278092499451,11cyclictest42-21ksoftirqd/319:10:593
278092499451,11cyclictest42-21ksoftirqd/319:10:583
2780921994538,4cyclictest0-21swapper/221:24:592
278092199452,41cyclictest0-21swapper/200:20:592
2780921994522,19cyclictest2807484-40lsb_release20:23:002
2780921994522,19cyclictest2807484-40lsb_release20:23:002
278091899458,32cyclictest0-21swapper/121:50:291
2780918994538,4cyclictest4497-21PK-Backend21:00:591
2780918994537,5cyclictest0-21swapper/123:06:591
2780918994511,7cyclictest2887417-21latency00:10:201
2780916994538,4cyclictest0-21swapper/022:59:580
2780916994513,28cyclictest2789656-21uptime19:30:290
2780924994437,4cyclictest4497-21PK-Backend21:46:583
278092499442,40cyclictest0-21swapper/322:53:593
2780921994438,4cyclictest0-21swapper/200:27:582
2780921994437,4cyclictest4497-21PK-Backend23:35:582
2780921994431,8cyclictest2826816-21kworker/2:222:54:592
2780921994420,6cyclictest141rcu_preempt19:10:582
2780921994420,6cyclictest141rcu_preempt19:10:582
2780918994435,6cyclictest231irq_work/119:53:581
2780916994436,5cyclictest0-21swapper/020:47:590
2780924994337,4cyclictest0-21swapper/322:37:583
2780924994330,8cyclictest2069-21gnome-shell23:12:593
2780921994336,4cyclictest0-21swapper/221:32:582
2780921994316,22cyclictest438-20systemd-journal22:14:552
2780918994334,6cyclictest231irq_work/100:01:591
2780916994313,26cyclictest2887079-21cstates00:10:140
28433682420,8chrt4497-21PK-Backend22:05:263
2780924994235,4cyclictest4497-21PK-Backend23:45:593
2780924994235,4cyclictest4497-21PK-Backend23:44:593
2780924994231,7cyclictest2069-21gnome-shell23:01:583
278092199429,6cyclictest141rcu_preempt20:45:002
2780921994222,17cyclictest2785640-21wc19:20:212
2780918994235,4cyclictest4497-21PK-Backend22:57:591
2780916994229,8cyclictest2848867-21ntp_states22:20:250
2780924994129,8cyclictest2069-21gnome-shell21:11:593
2780924994117,6cyclictest0-21swapper/323:55:583
2780924994116,6cyclictest141rcu_preempt22:00:593
2780924994116,6cyclictest141rcu_preempt22:00:593
278092499411,10cyclictest2848097-21cat22:20:113
2780921994130,6cyclictest34-21ksoftirqd/223:40:432
2780921994122,15cyclictest2873247-21expr23:30:132
2780916994116,22cyclictest4497-21PK-Backend23:05:410
278091699411,11cyclictest2855104-21systemctl22:40:010
278092199403,4cyclictest141rcu_preempt23:55:592
2780921994030,5cyclictest34-21ksoftirqd/200:38:302
278091699402,12cyclictest438-20systemd-journal00:05:000
2780924993933,4cyclictest0-21swapper/321:16:593
278092499392,7cyclictest2884872-21munin-run00:05:003
2780924993924,10cyclictest2069-21gnome-shell23:08:583
2780924993923,11cyclictest438-20systemd-journal22:45:393
2780924993916,6cyclictest0-21swapper/323:24:593
278092499389,5cyclictest141rcu_preempt19:30:563
2780924993822,12cyclictest2823358-21kworker/3:122:14:583
2780924993819,5cyclictest4497-21PK-Backend19:20:003
278092499381,31cyclictest1054-21snmpd19:24:593
278092199386,18cyclictest2802447-21basename20:10:132
278092199381,5cyclictest141rcu_preempt20:56:492
2780924993722,11cyclictest1-21systemd19:50:013
2780921993720,13cyclictest2878904-21awk23:45:232
278092199371,17cyclictest4497-21PK-Backend19:55:212
197399370,25rtkit-daemon4497-21PK-Backend19:40:052
2780924993625,7cyclictest2822737-21cat21:05:293
278092499362,21cyclictest2846718-21diskstats22:15:163
2780924993622,11cyclictest42-21ksoftirqd/321:20:143
2780924993621,11cyclictest2816331-21cron20:50:003
2780924993614,6cyclictest141rcu_preempt21:25:263
2780921993630,4cyclictest0-21swapper/220:35:582
2780921993629,4cyclictest4497-21PK-Backend21:27:592
2780921993624,7cyclictest438-20systemd-journal20:10:012
2780921993620,6cyclictest34-21ksoftirqd/223:55:022
2780921993620,12cyclictest2815013-21tr20:45:142
197399360,24rtkit-daemon0-21swapper/219:45:372
278092499354,19cyclictest42-21ksoftirqd/323:35:253
2780921993529,4cyclictest0-21swapper/221:03:592
2780921993518,13cyclictest34-21ksoftirqd/220:30:142
197399350,23rtkit-daemon0-21swapper/219:37:092
278092499345,14cyclictest141rcu_preempt19:35:583
278092499338,12cyclictest141rcu_preempt19:25:173
2780924993326,4cyclictest4497-21PK-Backend22:43:593
278092199332,14cyclictest2817392-21which20:50:242
278092499321,4cyclictest4497-21PK-Backend20:31:263
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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