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2026-03-09 - 22:56

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, 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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  Intel
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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack1slot6s.osadl.org (updated Mon Mar 09, 2026 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
522921140,4sleep35228-21df08:59:033
440021020,7sleep34399-21sed09:44:173
28560999544,44cyclictest2015-21gltestperf05:59:131
28560999541,47cyclictest31096-21gltestperf08:49:071
2856099954,26cyclictest27884-21cpuspeed_turbos11:08:541
2856099944,29cyclictest0-21swapper/110:18:571
28562999223,41cyclictest0-21swapper/209:39:392
28560999126,14cyclictest0-21swapper/108:28:491
28560999126,14cyclictest0-21swapper/108:28:491
2856099874,24cyclictest0-21swapper/107:55:391
28560998629,10cyclictest29107-21gltestperf09:34:061
28560998524,8cyclictest121850irq/46-eth010:54:151
2856099813,26cyclictest0-21swapper/109:26:091
2856099794,28cyclictest0-21swapper/107:59:021
2856099784,31cyclictest0-21swapper/110:24:251
2856099756,36cyclictest25249-21iostat11:04:031
2856099744,15cyclictest0-21swapper/108:34:001
2856099734,24cyclictest0-21swapper/110:33:481
2856099734,24cyclictest0-21swapper/110:33:481
28562997223,31cyclictest13785-21ssh09:59:062
2760427210,50sleep00-21swapper/005:44:170
28562997121,35cyclictest4952-21kworker/u8:110:14:042
317622700,5sleep3361ktimersoftd/311:14:013
317622700,5sleep3361ktimersoftd/311:14:013
28562997024,40cyclictest1247-21lldpd09:49:142
28562997017,31cyclictest19425-21ntpq09:19:132
28562996923,40cyclictest14917-21cat08:24:192
28562996923,40cyclictest14917-21cat08:24:192
28562996920,35cyclictest0-21swapper/208:02:132
28562996913,51cyclictest0-21swapper/208:50:522
2856299685,35cyclictest20332-21ssh10:57:522
28562996821,41cyclictest24207-21aten_r1power_cu11:03:522
28562996813,48cyclictest0-21swapper/209:34:572
28562996724,16cyclictest1419-21runrttasks06:24:082
28562996721,40cyclictest20719-21strings10:09:092
28562996721,40cyclictest17207-21latency10:04:092
28562996714,47cyclictest0-21swapper/210:19:062
28562996714,47cyclictest0-21swapper/208:57:122
28562996619,40cyclictest21707-21cat08:34:202
28562996617,44cyclictest0-21swapper/210:29:062
28562996617,43cyclictest1419-21runrttasks09:25:442
28562996617,33cyclictest0-21swapper/209:18:472
28562996614,34cyclictest27538-21basename06:54:032
28562996523,36cyclictest24716-21latency_hist07:53:502
28562996522,11cyclictest6007-21ssh08:59:152
28562996515,43cyclictest0-21swapper/210:42:152
28562996510,49cyclictest0-21swapper/210:35:352
28562996510,49cyclictest0-21swapper/210:35:352
2855599654,30cyclictest0-21swapper/008:04:390
248599650,5rtkit-daemon2484-21rtkit-daemon07:25:212
2856299649,49cyclictest0-21swapper/209:06:092
28562996427,12cyclictest12534-21ssh09:09:102
28562996427,12cyclictest12534-21ssh09:09:102
28562996421,37cyclictest12809-21sed07:29:102
28562996417,40cyclictest0-21swapper/208:10:002
28562996416,42cyclictest0-21swapper/208:14:072
28562996318,39cyclictest1419-21runrttasks11:09:492
28562996317,41cyclictest0-21swapper/208:06:572
28562996317,32cyclictest18572-21grep08:29:212
2856299627,49cyclictest0-21swapper/208:39:092
28562996217,40cyclictest0-21swapper/207:09:002
28562996215,31cyclictest0-21swapper/210:24:052
28562996213,32cyclictest0-21swapper/210:49:032
2855599624,41cyclictest0-21swapper/008:29:520
303812614,13sleep30-21swapper/305:49:263
2856299619,46cyclictest0-21swapper/207:58:292
28562996119,27cyclictest23628-21ssh11:02:372
28562996117,29cyclictest0-21swapper/210:44:162
28562996114,34cyclictest0-21swapper/208:19:102
28562996114,30cyclictest26111-21munin-node09:29:132
2855599614,29cyclictest0-21swapper/010:29:130
28555996122,21cyclictest1609-21wc11:18:420
28555996122,21cyclictest1609-21wc11:18:420
28562996036,18cyclictest1419-21runrttasks06:06:342
28562996018,19cyclictest1419-21runrttasks11:14:062
28562996018,19cyclictest1419-21runrttasks11:14:062
28562996018,14cyclictest0-21swapper/208:47:342
28562996013,30cyclictest0-21swapper/209:44:042
2855599604,39cyclictest0-21swapper/010:36:320
2855599604,39cyclictest0-21swapper/010:36:320
2855599604,34cyclictest0-21swapper/008:53:470
28555996019,24cyclictest1419-21runrttasks09:21:010
28562995917,22cyclictest9498-21tail09:53:582
28562995913,28cyclictest0-21swapper/207:03:522
28562995913,28cyclictest0-21swapper/207:03:522
261732593,48sleep00-21swapper/006:49:160
28562995815,38cyclictest0-21swapper/207:18:522
28562995812,39cyclictest20141-21systemd-cgroups06:38:522
305772573,48sleep00-21swapper/009:36:090
28563995741,10cyclictest2008-21gltestperf05:59:133
28562995716,36cyclictest0-21swapper/207:48:502
28562995716,36cyclictest0-21swapper/207:48:502
28562995713,37cyclictest0-21swapper/206:49:062
2856099573,13cyclictest0-21swapper/110:53:101
2855599575,30cyclictest0-21swapper/008:28:490
2855599575,30cyclictest0-21swapper/008:28:490
2855599574,36cyclictest0-21swapper/009:27:140
28555995716,24cyclictest25792-21grep07:54:080
28562995611,40cyclictest0-21swapper/205:59:042
2856099566,11cyclictest0-21swapper/109:07:551
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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