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2025-12-16 - 20:21

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 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 rackcslot7s.osadl.org (updated Tue Dec 16, 2025 12:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
22523462900,7sleep14497-21PK-Backend11:40:021
22380032900,5sleep34497-21PK-Backend11:00:003
197399780,10rtkit-daemon2746-21gmain09:30:221
2156119997741,9cyclictest13-21ksoftirqd/008:40:540
215449127751,16sleep10-21swapper/107:05:091
197399770,62rtkit-daemon0-21swapper/207:09:012
2156119997623,50cyclictest161rcuc/008:35:580
215612699726,15cyclictest923-21dbus-daemon08:35:032
215612699675,40cyclictest2250333-21systemd-udevd11:33:562
215457026743,16sleep30-21swapper/307:05:113
215583926545,14sleep00-21swapper/007:08:260
22697062640,24sleep126-21ksoftirqd/112:25:301
22697062640,24sleep126-21ksoftirqd/112:25:301
2156129996433,16cyclictest42-21ksoftirqd/309:05:583
2156126996451,9cyclictest2069-21gnome-shell11:55:592
2156126996310,29cyclictest2069-21gnome-shell08:53:082
2156126996310,29cyclictest2069-21gnome-shell08:53:082
2156126996151,6cyclictest2069-21gnome-shell12:33:582
22127832600,13sleep1261ksoftirqd/109:45:251
2156126996050,6cyclictest2069-21gnome-shell08:41:582
215611999602,54cyclictest2069-21gnome-shell10:33:590
215611999602,54cyclictest2069-21gnome-shell10:33:590
215611999602,15cyclictest2069-21gnome-shell09:46:580
215612699597,10cyclictest2246283-21users11:20:312
2156123995938,16cyclictest2069-21gnome-shell09:25:581
215611999592,16cyclictest2193950-40lsb_release08:52:580
215611999592,16cyclictest2193950-40lsb_release08:52:580
215612999582,15cyclictest2069-21gnome-shell12:38:593
2156126995748,6cyclictest2069-21gnome-shell10:57:592
2156123995727,6cyclictest141rcu_preempt09:23:581
2156123995725,5cyclictest141rcu_preempt11:14:591
215611999579,45cyclictest2069-21gnome-shell09:24:580
215611999571,52cyclictest2069-21gnome-shell11:37:590
215611999571,52cyclictest2069-21gnome-shell09:09:580
215612999562,50cyclictest2069-21gnome-shell10:53:593
215612999562,50cyclictest2069-21gnome-shell10:53:593
215612699564,11cyclictest2179098-21systemd-run08:15:002
2156123995626,6cyclictest141rcu_preempt09:18:581
215612699557,15cyclictest2179594-21cstates08:15:152
215612699556,20cyclictest2217131-21date10:00:022
215612699554,24cyclictest0-21swapper/210:30:032
215612699554,24cyclictest0-21swapper/210:30:032
2156126995514,15cyclictest2234173-21taskset10:45:302
215611999552,11cyclictest2250141-40lsb_release11:31:590
2156123995426,6cyclictest141rcu_preempt09:35:581
215612399542,10cyclictest2069-21gnome-shell07:32:581
215611999542,48cyclictest2069-21gnome-shell09:19:580
215611999542,10cyclictest2069-21gnome-shell08:16:580
215612999532,41cyclictest4497-21PK-Backend09:32:583
215612699539,18cyclictest2165315-21sed07:35:022
215612699538,21cyclictest2160664-21idleruntime07:20:182
215612699538,21cyclictest2160664-21idleruntime07:20:182
215612699537,18cyclictest2238558-21expr11:00:132
215612699536,24cyclictest2177424-21latency_hist08:10:022
215612699536,24cyclictest2177424-21latency_hist08:10:022
215612699536,18cyclictest2240339-21expr11:05:152
215612699534,21cyclictest2259910-21cstates12:00:142
215612699532,10cyclictest2069-21gnome-shell12:13:592
215612699532,10cyclictest2069-21gnome-shell12:07:582
2156123995325,5cyclictest141rcu_preempt08:00:581
215612399532,47cyclictest2069-21gnome-shell07:47:581
215612399532,10cyclictest2069-21gnome-shell07:44:581
215611999532,41cyclictest2069-21gnome-shell10:42:590
215611999532,10cyclictest2069-21gnome-shell10:26:590
2156119995311,28cyclictest141rcu_preempt09:54:580
215612999522,46cyclictest2069-21gnome-shell12:27:593
215612999522,46cyclictest2069-21gnome-shell12:27:593
215612999521,10cyclictest2069-21gnome-shell11:26:593
215612699527,18cyclictest2256340-21cat11:50:152
215612699526,22cyclictest1-21systemd10:30:022
215612699526,17cyclictest2244939-21munin-run11:20:002
215612699526,17cyclictest2244939-21munin-run11:20:002
215612699525,25cyclictest0-21swapper/208:55:272
215612699524,30cyclictest2247533-21cat11:25:232
215612399522,45cyclictest2069-21gnome-shell09:53:581
2156119995245,5cyclictest2156112-21cyclictest09:28:580
215611999522,9cyclictest2069-21gnome-shell09:30:580
22529532510,5sleep0161rcuc/011:40:210
2156129995144,5cyclictest4497-21PK-Backend08:36:583
215612699517,18cyclictest2069-21gnome-shell08:47:082
215612699517,16cyclictest2242603-21sensors11:10:262
215612699516,27cyclictest2201391-21munin-run09:15:002
215612699516,18cyclictest2172734-21cat07:55:142
2156123995144,4cyclictest4497-21PK-Backend12:19:591
215612399512,5cyclictest0-21swapper/110:29:591
215612399512,45cyclictest2069-21gnome-shell07:22:581
215612399512,45cyclictest2069-21gnome-shell07:22:581
215611999515,43cyclictest0-21swapper/012:03:590
2156119995139,8cyclictest2069-21gnome-shell07:52:580
2156119995137,10cyclictest2069-21gnome-shell07:20:580
2156119995137,10cyclictest2069-21gnome-shell07:20:580
215611999512,45cyclictest2069-21gnome-shell10:14:590
215611999512,45cyclictest2069-21gnome-shell08:02:580
215612699506,16cyclictest1-21systemd10:10:002
215612399502,45cyclictest231irq_work/108:07:581
215612399502,45cyclictest231irq_work/108:07:581
215611999507,38cyclictest2069-21gnome-shell07:38:580
215611999501,45cyclictest2069-21gnome-shell11:14:590
215612699497,16cyclictest2273750-21apt-config12:40:022
215612699495,20cyclictest2174786-21cat08:00:222
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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