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2026-04-09 - 15:06

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #3

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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackeslot3s.osadl.org (updated Thu Apr 09, 2026 00:45:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
20156839912448,9cyclictest37-21ksoftirqd/322:40:013
2015666991103,3cyclictest131rcu_preempt21:45:020
2015666991103,3cyclictest131rcu_preempt21:45:020
20156669910417,11cyclictest2076043-21cat23:15:020
2015666999628,13cyclictest2042615-21ssh21:57:380
2015666999628,13cyclictest2042615-21ssh21:57:370
2015678998656,20cyclictest30-21ksoftirqd/221:10:022
2015678998656,20cyclictest30-21ksoftirqd/221:10:012
2015666998428,12cyclictest2033903-21ssh21:37:260
2015666998326,13cyclictest2090849-21ssh23:49:210
2015666998227,12cyclictest2110361-21ssh00:34:230
2015666998127,17cyclictest2104196-21ssh00:20:010
2015666997827,15cyclictest2022138-21ssh21:10:090
2015666997727,10cyclictest2071954-21ssh23:05:160
2015666997726,12cyclictest2049284-21ssh22:13:070
201566699772,39cyclictest2054830-21ssh22:25:410
201566699762,38cyclictest2063357-21ssh22:45:300
2015666997535,4cyclictest16950irq/224-800000022:50:280
2015666997032,4cyclictest16950irq/224-800000022:33:370
2015666997032,4cyclictest16950irq/224-800000022:33:370
2015666997028,10cyclictest2094700-21ssh23:58:020
2015666997026,14cyclictest2111027-21ssh00:35:330
2015666996820,11cyclictest2061099-21ssh22:40:120
2015666996430,13cyclictest2041225-21ssh21:54:320
201566699641,3cyclictest131rcu_preempt23:40:000
2015666996324,10cyclictest16950irq/224-800000023:55:010
2015666996226,12cyclictest2088939-21ssh23:44:550
2015666996226,12cyclictest2088939-21ssh23:44:540
201566699614,21cyclictest16850irq/134-800000021:19:280
201566699614,21cyclictest16850irq/134-800000021:19:270
2015666996126,13cyclictest2070771-21ssh23:02:480
2015666996034,4cyclictest16950irq/224-800000021:44:540
201566699603,3cyclictest131rcu_preempt19:10:030
201566699603,3cyclictest131rcu_preempt19:10:020
2015666996028,11cyclictest2028410-21ssh21:24:590
2015666995931,13cyclictest2084496-21ssh23:34:400
2015666995931,13cyclictest2084496-21ssh23:34:400
2015683995834,15cyclictest1-21systemd00:00:003
2015678995843,7cyclictest2001902-21kworker/2:222:46:472
201568399577,32cyclictest3467602-21systemd-journal21:20:013
201568399577,32cyclictest3467602-21systemd-journal21:20:003
2015683995743,11cyclictest3467602-21systemd-journal19:55:013
2015683995731,20cyclictest275-21dbus-daemon20:10:013
2015678995748,5cyclictest2034933-21kworker/2:323:47:272
201568399562,49cyclictest3467602-21systemd-journal19:35:013
201568399558,28cyclictest2021307-21modprobe21:00:003
2015683995530,18cyclictest275-21dbus-daemon23:40:013
2015678995547,5cyclictest2034933-21kworker/2:322:17:082
2015666995541,9cyclictest16950irq/224-800000000:30:020
2015666995536,14cyclictest275-21dbus-daemon19:20:010
201567199549,10cyclictest1-21systemd20:40:011
2015671995443,8cyclictest23-21ksoftirqd/123:10:181
2015666995446,6cyclictest2015674-21latency_hist19:10:020
201566699544,32cyclictest16850irq/134-800000023:26:560
201566699542,43cyclictest0-21swapper/022:04:030
2015683995333,14cyclictest1-21systemd22:50:013
2015666995328,9cyclictest2059473-21ssh22:36:330
2015666995327,10cyclictest2030521-21ssh21:29:460
2015666995326,13cyclictest2069014-21ssh22:58:560
2015666995324,13cyclictest2098824-21ssh00:07:310
2015683995231,15cyclictest2039330-21cut21:50:023
2015683995231,15cyclictest2039330-21cut21:50:023
2015678995143,5cyclictest2034933-21kworker/2:323:10:012
2015678995143,5cyclictest2001902-21kworker/2:223:01:332
2015678995128,8cyclictest2034933-21kworker/2:323:14:562
2015671995135,11cyclictest275-21dbus-daemon22:50:011
201566699511,35cyclictest2051283-21ssh22:17:470
201568399506,32cyclictest2021595-21munin-plugin-st21:04:593
201568399501,5cyclictest131rcu_preempt00:15:023
201567899504,4cyclictest131rcu_preempt23:36:482
2015678995042,5cyclictest2001902-21kworker/2:222:02:312
2015678995042,4cyclictest2034933-21kworker/2:323:15:122
2015678995031,12cyclictest275-21dbus-daemon00:00:002
2015666995037,8cyclictest2017694-21munin-plugin-st19:50:000
2015683994931,13cyclictest3467602-21systemd-journal23:55:013
2015678994942,5cyclictest2019282-21kworker/2:021:24:052
2015678994941,5cyclictest2034933-21kworker/2:323:55:012
2015678994941,5cyclictest2001902-21kworker/2:222:05:302
2015678994940,6cyclictest2034933-21kworker/2:300:02:372
2015678994940,6cyclictest2001902-21kworker/2:221:16:022
2015678994940,6cyclictest2001902-21kworker/2:221:16:012
2015678994930,14cyclictest275-21dbus-daemon20:25:012
2015666994924,10cyclictest2046748-21ssh22:07:100
2015666994923,11cyclictest2080231-21ssh23:24:530
201568399486,7cyclictest131rcu_preempt22:10:013
201568399485,28cyclictest2078133-21modprobe23:20:003
2015683994833,12cyclictest1-21systemd00:05:013
201568399482,7cyclictest37-21ksoftirqd/319:15:013
201568399482,7cyclictest37-21ksoftirqd/319:15:013
2015683994823,17cyclictest1-21systemd22:15:013
2015678994840,5cyclictest2019282-21kworker/2:021:30:432
2015678994840,5cyclictest2001902-21kworker/2:221:42:082
2015678994840,5cyclictest2001902-21kworker/2:221:38:182
201567899482,4cyclictest131rcu_preempt22:40:022
201567199484,11cyclictest0-21swapper/123:45:011
201567199484,11cyclictest0-21swapper/123:45:011
201567199482,5cyclictest131rcu_preempt23:25:001
2015671994821,5cyclictest23-21ksoftirqd/122:01:231
2015666994838,7cyclictest12-21ksoftirqd/022:24:410
2015666994821,12cyclictest2096932-21ssh00:03:090
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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