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2025-12-10 - 02:45

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 Wed Dec 10, 2025 00:44:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
291412240164,24sleep30-21swapper/319:09:293
288392232161,58sleep00-21swapper/019:05:370
289422231163,54sleep10-21swapper/119:06:541
290712228155,23sleep20-21swapper/219:08:362
2178021500,4sleep22928599cyclictest22:30:202
13042560,3sleep32928999cyclictest21:45:123
313162520,1sleep10-21swapper/120:25:181
30112510,1sleep00-21swapper/019:20:170
101782460,1sleep30-21swapper/319:35:273
294512420,2sleep129456-21pmu-power00:00:221
246062420,3sleep30-21swapper/323:50:173
29272993511,11cyclictest20845-21awk22:30:010
2928599331,22cyclictest3459-21kworker/2:200:10:282
2927299335,13cyclictest25241-21munin-run22:40:010
29285993219,3cyclictest18843-21kworker/2:020:19:372
2928599321,26cyclictest18843-21kworker/2:021:49:522
2928599320,26cyclictest3459-21kworker/2:223:16:572
2927299328,11cyclictest21780-21awk20:05:000
2927299328,11cyclictest0-21swapper/022:00:010
2927299327,12cyclictest29007-21perf21:35:010
2927299323,13cyclictest21467-21munin-run23:45:010
8382310,2sleep20-21swapper/220:30:122
2928599312,20cyclictest3459-21kworker/2:223:22:152
2928599301,27cyclictest3459-21kworker/2:200:22:042
2928599301,20cyclictest18843-21kworker/2:021:42:002
2928599299,3cyclictest18843-21kworker/2:020:38:492
2928599291,19cyclictest3459-21kworker/2:200:31:432
2928599291,18cyclictest3459-21kworker/2:221:51:082
29272992911,15cyclictest29648-21awk22:50:010
262242290,5sleep02927299cyclictest22:40:170
2928599281,22cyclictest3459-21kworker/2:223:33:062
2928599281,12cyclictest3459-21kworker/2:223:35:462
2928599271,11cyclictest3459-21kworker/2:223:45:552
2928599270,11cyclictest18843-21kworker/2:021:33:522
2928999261,10cyclictest41-21ksoftirqd/320:14:373
29285992616,3cyclictest18843-21kworker/2:020:22:032
29285992616,3cyclictest18843-21kworker/2:020:22:032
29285992611,3cyclictest18843-21kworker/2:020:06:512
2928599261,11cyclictest18843-21kworker/2:021:16:342
2927899261,16cyclictest14634-21snmpd23:54:001
2927899260,11cyclictest0-21swapper/121:18:191
2927299262,12cyclictest25870-21munin-run23:55:010
2927299262,11cyclictest21066-21/usr/sbin/munin22:30:160
2927299261,11cyclictest32061-21/usr/sbin/munin22:55:230
2927299261,10cyclictest9426-21/usr/sbin/munin20:50:230
2928999252,11cyclictest0-21swapper/322:21:193
2928999251,6cyclictest18864-21/usr/sbin/munin22:25:173
2928999251,6cyclictest0-21swapper/322:35:293
2928999251,12cyclictest0-21swapper/323:40:123
2928599251,18cyclictest3459-21kworker/2:223:59:122
2928599251,13cyclictest3459-21kworker/2:222:00:222
29285992511,3cyclictest3459-21kworker/2:200:15:202
2928599251,10cyclictest3459-21kworker/2:223:04:032
2928599251,10cyclictest3459-21kworker/2:222:52:072
29285992510,3cyclictest3459-21kworker/2:223:40:382
2927899251,16cyclictest409-21irqstats22:55:201
29278992511,12cyclictest26688-21kworker/u8:021:37:111
2927899250,20cyclictest0-21swapper/122:21:051
2927299252,11cyclictest32727-21/usr/sbin/munin00:10:270
2927299252,10cyclictest1898-21/usr/sbin/munin23:00:230
2927299251,11cyclictest7858-21/usr/sbin/munin22:00:210
29289992417,4cyclictest25440-21head21:25:193
29289992417,4cyclictest25440-21head21:25:193
2928999241,5cyclictest0-21swapper/322:10:183
2928999240,11cyclictest0-21swapper/320:55:213
2928599248,3cyclictest18843-21kworker/2:019:45:212
2928599241,11cyclictest3459-21kworker/2:222:42:582
29285992410,8cyclictest18843-21kworker/2:020:10:332
29285992410,2cyclictest3459-21kworker/2:222:57:402
2927899242,3cyclictest24754-21perl20:10:191
2927899241,7cyclictest2898-21df00:15:131
29278992413,3cyclictest6144-21ls23:10:021
2927899241,20cyclictest19550-21crond20:00:011
2927299242,10cyclictest29476-21/usr/sbin/munin19:10:130
2927299241,4cyclictest0-21swapper/000:31:560
2928999236,5cyclictest0-21swapper/300:02:513
2928999231,6cyclictest0-21swapper/323:25:193
2928999231,6cyclictest0-21swapper/322:51:343
2928999231,4cyclictest21771-21timerandwakeup21:15:263
2928599239,8cyclictest86850irq/129-enp1s0-22:19:392
2928599232,11cyclictest3459-21kworker/2:222:24:582
2928599231,7cyclictest0-21swapper/222:25:532
2928599231,10cyclictest3459-21kworker/2:221:59:242
29285992310,3cyclictest3459-21kworker/2:200:05:142
29285992310,2cyclictest3459-21kworker/2:223:14:052
2927899232,3cyclictest18106-21irqstats23:35:191
2927899231,9cyclictest28572-21memory22:45:191
2927899231,7cyclictest0-21swapper/123:59:501
29278992313,3cyclictest18363-21cut21:10:141
2927899231,16cyclictest31252-21sshd19:12:421
2927899231,14cyclictest28998-21munin-run21:35:011
2927299238,5cyclictest0-21swapper/000:05:270
2927299233,3cyclictest86750irq/128-enp1s0-21:46:470
2927299231,10cyclictest14463-21/usr/sbin/munin22:15:190
5352221,2sleep0537-21acpi20:30:110
2928999224,9cyclictest12049-21ntpq19:40:203
2928999221,6cyclictest0-21swapper/322:50:013
2928999221,6cyclictest0-21swapper/300:30:553
2928999221,3cyclictest86550irq/126-enp1s0-21:35:013
2928999221,14cyclictest39-21rcuc/323:12:413
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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