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2026-08-21 - 03:16

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 Fri Aug 21, 2026 00:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
25572235163,24sleep20-21swapper/219:07:282
24112234164,57sleep30-21swapper/319:05:363
24962204167,25sleep10-21swapper/119:06:431
25702203166,25sleep00-21swapper/019:07:380
2068921670,4sleep0282899cyclictest21:00:190
2557321360,4sleep3284899cyclictest21:10:253
540821300,1sleep30-21swapper/321:40:153
2844996157,3cyclictest0-21swapper/222:37:222
2844996157,3cyclictest0-21swapper/222:37:222
216782580,4sleep011-21rcuc/022:15:230
76332550,2sleep20-21swapper/221:45:152
166352530,5sleep1283799cyclictest22:05:171
224132470,3sleep20-21swapper/219:50:222
128272470,3sleep212829-21gltestperf23:10:152
284499416,4cyclictest3465-21sort20:20:242
2844993813,3cyclictest25099-21users19:55:262
36192370,3sleep13623-21latency21:35:191
2848993711,3cyclictest26949-21/usr/sbin/munin22:30:143
282899378,13cyclictest1710-21awk00:00:010
2828993712,10cyclictest1523-21df_inode22:45:150
284899361,33cyclictest0-21swapper/321:47:033
2844993633,2cyclictest0-21swapper/222:53:362
284499362,7cyclictest0-21swapper/221:21:592
284499361,4cyclictest30240-21diskstats23:50:152
284499361,13cyclictest0-21swapper/222:44:312
284499361,12cyclictest0-21swapper/223:03:472
284499351,3cyclictest4718-21sshd21:39:562
284499351,3cyclictest12050irq/123-ahci[0000:30:022
284499351,16cyclictest0-21swapper/221:08:512
284499351,13cyclictest0-21swapper/223:31:232
283799352,2cyclictest23905-21diskmemload23:58:131
282899358,13cyclictest808-21snmpd20:25:020
2848993423,3cyclictest0-21swapper/321:29:233
2848993412,3cyclictest7179-21sendmail_mailst19:15:243
2848993411,3cyclictest9977-21cut23:05:023
2848993411,3cyclictest16017-21hwlatdetect20:50:163
284499349,3cyclictest0-21swapper/219:36:312
284499341,6cyclictest0-21swapper/223:21:512
2844993411,3cyclictest0-21swapper/221:03:432
284499341,13cyclictest0-21swapper/220:19:152
2844993411,3cyclictest0-21swapper/220:14:192
2844993411,3cyclictest0-21swapper/220:14:192
284499341,12cyclictest0-21swapper/220:09:512
2828993415,10cyclictest24305-40dnf22:22:230
284899333,8cyclictest12580-40dnf00:23:253
284899331,6cyclictest0-21swapper/322:24:083
284899331,4cyclictest0-21swapper/300:30:573
284899331,28cyclictest47092sleep319:11:193
284899330,15cyclictest0-21swapper/320:39:393
284499339,3cyclictest0-21swapper/220:29:152
284499338,3cyclictest0-21swapper/221:57:312
284499333,3cyclictest87350irq/126-enp1s0-21:30:352
2844993313,3cyclictest29663-21grep23:50:012
2844993313,3cyclictest29663-21grep23:50:012
284499331,13cyclictest0-21swapper/219:23:152
284499331,12cyclictest0-21swapper/223:27:552
284499331,12cyclictest0-21swapper/223:07:552
2844993310,3cyclictest0-21swapper/220:46:312
282899336,8cyclictest14824-21ntp_states22:00:220
2828993312,6cyclictest5118-21cat19:15:010
284899321,6cyclictest0-21swapper/321:33:303
2848993211,3cyclictest6578-21sort22:55:193
284899321,11cyclictest0-21swapper/300:09:313
284499329,3cyclictest0-21swapper/223:40:272
284499329,3cyclictest0-21swapper/220:31:512
284499329,3cyclictest0-21swapper/200:08:072
284499321,6cyclictest0-21swapper/223:57:522
284499321,6cyclictest0-21swapper/222:31:052
284499321,6cyclictest0-21swapper/222:20:322
284499321,6cyclictest0-21swapper/221:43:112
284499321,5cyclictest1923-21/usr/sbin/munin00:00:222
284499321,5cyclictest0-21swapper/222:49:302
284499321,13cyclictest0-21swapper/223:39:592
284499321,13cyclictest0-21swapper/219:17:352
284499321,11cyclictest0-21swapper/221:27:472
284499321,10cyclictest0-21swapper/219:30:312
2844993210,3cyclictest0-21swapper/200:34:392
282899327,18cyclictest87350irq/126-enp1s0-23:45:170
282899327,18cyclictest87350irq/126-enp1s0-23:45:170
284899313,9cyclictest30247-40dnf21:21:593
284899312,4cyclictest20414-21cpu22:15:113
284899312,13cyclictest495-21jbd2/dm-0-819:40:273
284899311,9cyclictest15093-21turbostat.cron20:49:563
284899311,6cyclictest0-21swapper/319:25:233
284899311,13cyclictest0-21swapper/323:38:473
284899311,12cyclictest0-21swapper/323:19:313
284899311,12cyclictest0-21swapper/322:36:513
284899311,12cyclictest0-21swapper/322:36:513
284899311,11cyclictest0-21swapper/321:59:553
284899311,11cyclictest0-21swapper/300:39:353
284499319,3cyclictest0-21swapper/220:38:432
284499318,3cyclictest0-21swapper/222:09:352
284499317,3cyclictest0-21swapper/219:43:192
284499314,3cyclictest87650irq/129-enp1s0-23:15:232
284499311,5cyclictest0-21swapper/221:14:162
284499311,13cyclictest0-21swapper/200:39:512
282899318,8cyclictest4321-21ls00:05:150
2828993110,11cyclictest23280-21crond19:55:010
284899301,9cyclictest0-21swapper/319:59:103
2848993017,3cyclictest0-21swapper/323:53:433
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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