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2026-08-27 - 05:31

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, 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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack5slot3s.osadl.org (updated Thu Aug 27, 2026 00:44:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
151742243166,25sleep20-21swapper/219:06:342
151742243166,25sleep20-21swapper/219:06:342
152602231162,56sleep00-21swapper/019:07:410
152602231162,56sleep00-21swapper/019:07:410
151002227156,22sleep10-21swapper/119:05:361
151002227156,22sleep10-21swapper/119:05:361
153312201166,23sleep30-21swapper/319:08:363
153312201166,23sleep30-21swapper/319:08:363
2057721270,4sleep11553099cyclictest20:30:241
15535999385,3cyclictest0-21swapper/200:37:182
240282520,3sleep224031-21idleruntime-cro21:55:012
15535995046,3cyclictest0-21swapper/220:33:582
284412480,3sleep3401ktimersoftd/322:05:023
235662470,4sleep341-21ksoftirqd/320:40:023
210212460,1sleep20-21swapper/219:20:102
15541994027,3cyclictest0-21swapper/319:33:033
1554199401,31cyclictest0-21swapper/323:58:593
15541993824,8cyclictest0-21swapper/300:23:273
15541993623,8cyclictest0-21swapper/319:48:273
1554199361,19cyclictest4237-21diskmemload23:28:273
15541993526,7cyclictest0-21swapper/319:56:353
15541993520,3cyclictest0-21swapper/320:27:033
1554199351,27cyclictest0-21swapper/322:17:593
1554199351,15cyclictest0-21swapper/321:45:233
1553599351,27cyclictest0-21swapper/221:44:132
1552499359,12cyclictest8647-21idleruntime-cro21:20:010
1552499354,15cyclictest22452-21munin-run23:05:010
15524993510,12cyclictest25601-21munin-run20:45:010
15541993426,3cyclictest0-21swapper/320:07:393
1553599344,3cyclictest87650irq/129-enp1s0-23:05:182
1554199331,14cyclictest0-21swapper/323:41:153
1553599332,7cyclictest24088-40dnf19:25:252
1552499338,11cyclictest14619-21awk20:20:010
1552499337,13cyclictest18058-21awk22:55:010
86342320,2sleep18637-21latency_hist21:20:011
1554199321,23cyclictest0-21swapper/322:49:513
1554199321,19cyclictest0-21swapper/320:23:513
1554199321,18cyclictest4237-21diskmemload00:26:033
1554199321,14cyclictest0-21swapper/323:37:313
1554199321,14cyclictest0-21swapper/322:10:513
1553599321,14cyclictest0-21swapper/222:48:132
15541993118,3cyclictest0-21swapper/322:37:513
15541993118,3cyclictest0-21swapper/322:37:513
1553599311,19cyclictest0-21swapper/220:20:252
1553599311,14cyclictest0-21swapper/219:49:012
1553599311,13cyclictest0-21swapper/220:11:172
1553599310,24cyclictest0-21swapper/223:00:172
1553599310,13cyclictest0-21swapper/223:54:412
15541993018,3cyclictest0-21swapper/323:54:353
15541993018,3cyclictest0-21swapper/319:52:553
15541993018,2cyclictest659-21kworker/u8:219:26:353
15541993017,3cyclictest0-21swapper/321:10:473
15541993015,8cyclictest0-21swapper/300:07:393
1554199301,17cyclictest4237-21diskmemload21:58:153
1554199301,13cyclictest23765-21cpuspeed_turbos20:40:113
1554199301,13cyclictest0-21swapper/322:07:033
1554199301,12cyclictest0-21swapper/323:19:193
1553599301,13cyclictest26568-21ntp_states00:25:212
1553599301,12cyclictest0-21swapper/219:40:292
15535993010,2cyclictest87650irq/129-enp1s0-23:55:192
15541992918,3cyclictest0-21swapper/322:51:273
15541992917,3cyclictest0-21swapper/322:43:033
1554199291,18cyclictest0-21swapper/321:34:433
1554199291,13cyclictest0-21swapper/321:50:273
1554199291,12cyclictest0-21swapper/323:31:153
1553599291,20cyclictest0-21swapper/219:10:432
1553599291,13cyclictest0-21swapper/223:29:132
1553599291,13cyclictest0-21swapper/221:45:412
1553599290,17cyclictest0-21swapper/219:17:012
15541992812,6cyclictest0-21swapper/320:52:313
1554199281,13cyclictest0-21swapper/323:02:353
1554199281,13cyclictest0-21swapper/321:29:313
1554199281,12cyclictest0-21swapper/321:42:113
1554199281,12cyclictest0-21swapper/300:01:353
1554199281,11cyclictest0-21swapper/322:56:473
15535992812,3cyclictest11517-21date22:40:012
15535992812,3cyclictest11517-21date22:40:012
1553599281,14cyclictest0-21swapper/220:58:332
1553599281,14cyclictest0-21swapper/220:02:452
15535992811,3cyclictest1978-21df19:50:132
1553599281,13cyclictest0-21swapper/222:13:052
1553599281,13cyclictest0-21swapper/220:51:132
1553599281,13cyclictest0-21swapper/200:33:012
1553599281,12cyclictest10200-21grep21:20:252
1553599281,12cyclictest0-21swapper/221:57:412
1553599281,11cyclictest0-21swapper/222:07:392
140412280,4sleep29-21rcu_preempt21:30:212
15541992722,3cyclictest0-21swapper/319:20:433
15541992716,3cyclictest0-21swapper/321:24:193
15541992716,3cyclictest0-21swapper/320:16:353
15541992714,8cyclictest0-21swapper/320:49:113
15541992714,3cyclictest0-21swapper/320:55:313
1554199271,18cyclictest0-21swapper/320:12:353
1554199271,12cyclictest0-21swapper/323:05:473
1553599271,12cyclictest7472-21awk21:15:172
1553599271,12cyclictest0-21swapper/220:49:012
1553599271,11cyclictest0-21swapper/221:02:012
1553599271,11cyclictest0-21swapper/219:33:052
1554199268,2cyclictest0-21swapper/321:37:273
1554199261,11cyclictest0-21swapper/319:41:113
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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