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2026-08-20 - 11:04

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #8, 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 rack8slot6s.osadl.org (updated Thu Aug 20, 2026 00:43:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
85629910521049,3cyclictest31134-21turbostat23:54:553
85629910491046,3cyclictest2758-21turbostat00:29:553
85629910471046,1cyclictest2324-21kworker/3:2+events22:14:003
85629910361035,1cyclictest27078-21kworker/3:1+events23:23:183
85499910361035,1cyclictest22636-21kworker/0:0+events23:13:290
85629910331030,2cyclictest24657-21turbostat19:54:553
85629910321030,2cyclictest24017-21kworker/3:0+events19:44:403
85499910321031,1cyclictest3104-21kworker/0:2+events00:36:310
85499910321031,1cyclictest3104-21kworker/0:2+events00:36:310
85629910301029,1cyclictest436-21kworker/3:0+events21:17:013
85579910261025,1cyclictest4491-21kworker/2:2+events00:01:512
85629910251022,3cyclictest15550-21turbostat23:39:553
85629910251022,2cyclictest12242-21kworker/3:2+events22:37:223
85499910241022,2cyclictest10522-21kworker/0:1+events20:55:220
85539910221020,2cyclictest2692-21turbostat21:54:541
85629910211020,1cyclictest14126-21kworker/3:1+events22:03:393
85629910211019,1cyclictest17874-21kworker/3:0+events23:32:533
85579910201019,1cyclictest18335-21kworker/2:0+events23:59:452
85579910191018,1cyclictest2482-21kworker/2:0+events22:24:092
85629910181018,0cyclictest19480-21kworker/3:0+events00:13:413
85579910181017,1cyclictest11713-21kworker/2:1+events23:04:112
85629910161015,1cyclictest17874-21kworker/3:0+events23:25:223
85579910161015,1cyclictest2482-21kworker/2:0+events22:27:312
85629910141011,3cyclictest29949-21turbostat00:24:563
85499910141013,1cyclictest20461-21kworker/0:2+events20:24:000
85629910101009,1cyclictest20707-21kworker/3:0+events22:19:003
85499910081006,2cyclictest3813-21kworker/0:0+events21:33:180
85629910041003,1cyclictest20561-21kworker/3:1+events19:49:513
85539910031002,1cyclictest30338-21kworker/1:0+events20:04:351
85629910021001,1cyclictest31353-21kworker/3:1+events22:30:223
8562991001999,2cyclictest436-21kworker/3:0+events21:53:293
8562991001999,2cyclictest1596-21kworker/3:2+events21:11:503
85629910011000,1cyclictest1596-21kworker/3:2+events20:11:243
8562991000999,1cyclictest14126-21kworker/3:1+events22:05:203
856299999998,1cyclictest2324-21kworker/3:2+events21:57:543
854999998997,1cyclictest10522-21kworker/0:1+events21:25:220
855399997994,1cyclictest27466-21kworker/1:1+events19:59:091
854999997996,1cyclictest16684-21kworker/0:0+events20:50:210
856299996996,0cyclictest23936-21kworker/3:1+events21:07:453
856299996995,1cyclictest12881-21kworker/3:2+events00:17:133
854999996995,1cyclictest18407-21kworker/0:1+events19:38:070
854999996995,1cyclictest11211-21kworker/0:2+events22:47:470
854999994993,1cyclictest15696-21kworker/0:1+events19:17:340
854999993993,0cyclictest3025-21kworker/0:1+events22:55:210
854999993992,1cyclictest16179-21kworker/0:0+events19:28:410
854999993992,1cyclictest16179-21kworker/0:0+events19:28:410
855799992991,1cyclictest4491-21kworker/2:2+events00:07:112
856299991989,2cyclictest18916-21turbostat20:59:543
855799991989,2cyclictest18570-21turbostat19:39:552
854999990990,0cyclictest30763-21kworker/0:0+events00:32:560
854999990989,1cyclictest3813-21kworker/0:0+events21:22:410
854999990989,1cyclictest21153-21kworker/0:1+events23:44:470
854999990989,1cyclictest10522-21kworker/0:1+events20:44:260
854999990987,3cyclictest25947-21turbostat23:49:560
856299989988,1cyclictest20561-21kworker/3:1+events20:17:243
855799989987,2cyclictest18335-21kworker/2:0+events23:06:502
856299988988,0cyclictest17874-21kworker/3:0+events23:16:073
854999988987,1cyclictest15696-21kworker/0:1+events19:10:230
854999987985,1cyclictest3104-21kworker/0:2+events00:26:260
854999985984,1cyclictest22658-21kworker/0:0+events22:50:220
856299984982,1cyclictest30683-21kworker/3:0+events20:06:143
854999983982,1cyclictest16179-21kworker/0:0+events19:23:180
854999983982,1cyclictest16179-21kworker/0:0+events19:23:180
854999983982,1cyclictest11211-21kworker/0:2+events22:44:430
854999982981,1cyclictest5234-21kworker/0:0+events20:38:390
854999982981,1cyclictest5234-21kworker/0:0+events20:26:040
854999982981,1cyclictest16362-21kworker/0:2+events19:32:140
854999982981,1cyclictest14649-21kworker/0:2+events20:46:270
854999982981,1cyclictest11211-21kworker/0:2+events21:43:410
854999978977,1cyclictest21207-21kworker/0:2+events21:01:060
854999977975,2cyclictest10522-21kworker/0:1+events20:32:550
854999975973,0cyclictest11211-21kworker/0:2+events21:36:480
854999974972,1cyclictest11211-21kworker/0:2+events21:49:130
854999973971,2cyclictest10352-21turbostat23:34:550
854999973970,3cyclictest28682-21turbostat20:04:550
856299961959,2cyclictest14289-21turbostat21:34:543
856299959957,2cyclictest7114-21turbostat22:29:553
854999933931,2cyclictest30702-21turbostat20:09:540
854999932930,2cyclictest20581-21turbostat19:44:550
855399916914,2cyclictest21357-21turbostat21:04:541
854999908905,3cyclictest14373-21turbostat00:09:560
856299900898,2cyclictest5930-21turbostat22:59:553
855799899897,2cyclictest12327-21turbostat22:34:552
855799878875,3cyclictest29890-21turbostat21:49:552
856299874873,1cyclictest13157-21turbostat00:39:563
856299874873,1cyclictest13157-21turbostat00:39:563
856299856854,2cyclictest16342-21turbostat23:09:553
856299692691,1cyclictest29890-21turbostat21:49:543
854999676675,1cyclictest17507-21turbostat22:39:550
856299671669,2cyclictest14373-21turbostat00:09:553
856299658657,1cyclictest21357-21turbostat21:04:543
854999628624,2cyclictest30623-21turbostat21:19:540
856299609606,3cyclictest18570-21turbostat19:39:553
854999604600,4cyclictest16342-21turbostat23:09:560
856299600597,3cyclictest21535-21turbostat23:14:553
855399597595,2cyclictest24657-21turbostat19:54:551
855799594591,3cyclictest5930-21turbostat22:59:552
854999568567,1cyclictest15550-21turbostat23:39:550
854999557556,1cyclictest29949-21turbostat00:24:560
856299553551,2cyclictest25947-21turbostat23:49:553
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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