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2026-08-11 - 14:28

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #7

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 rack7slot7s.osadl.org (updated Tue Aug 11, 2026 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2446129481,8sleep00-21swapper/019:05:250
2485329367,8sleep20-21swapper/219:05:352
2511428963,8sleep30-21swapper/319:08:583
2515228568,13sleep10-21swapper/119:09:281
183082300,0chrt18309-21diskmemload00:22:512
2528699270,26cyclictest0-21swapper/022:55:300
2529399250,4cyclictest0-21swapper/222:25:442
2529699230,2cyclictest0-21swapper/321:31:013
25293992317,5cyclictest32-21ksoftirqd/223:40:012
2529399230,2cyclictest0-21swapper/222:34:292
2529399230,23cyclictest0-21swapper/222:19:282
2529399230,17cyclictest0-21swapper/222:02:042
107122230,0sleep10-21swapper/122:41:081
2529399220,22cyclictest0-21swapper/222:38:432
2529399220,22cyclictest0-21swapper/222:12:312
2528699220,21cyclictest0-21swapper/022:22:430
25296992117,3cyclictest39-21ksoftirqd/322:55:003
2528699210,20cyclictest0-21swapper/000:03:500
2529399200,20cyclictest0-21swapper/223:46:362
25296991915,3cyclictest8163-21seq21:22:413
2529199190,3cyclictest0-21swapper/122:09:511
5222180,0sleep20-21swapper/221:37:262
25293991817,1cyclictest0-21swapper/222:45:172
2529399180,17cyclictest0-21swapper/200:34:082
2529199181,1cyclictest18342-21diskmemload23:50:021
2529199180,18cyclictest5075-21kworker/1:222:24:421
2528699180,3cyclictest0-21swapper/022:48:490
2528699180,17cyclictest0-21swapper/000:25:470
2529699174,12cyclictest19313-21taskset22:27:203
25296991713,3cyclictest16732-21ssh23:05:003
2529399170,17cyclictest0-21swapper/223:56:442
2529199171,14cyclictest3641-21/usr/sbin/munin23:55:241
2528699170,1cyclictest0-21swapper/023:00:370
2529699163,13cyclictest0-21swapper/321:40:293
25296991612,2cyclictest12315-21ssh21:25:163
2529399160,1cyclictest0-21swapper/220:40:142
2529199163,6cyclictest0-21swapper/100:08:001
2528699163,7cyclictest26739-21munin-run21:15:000
2529699151,14cyclictest0-21swapper/323:18:553
2529699151,14cyclictest0-21swapper/323:18:553
2529699151,12cyclictest0-21swapper/300:05:583
2529399152,10cyclictest2353-21kworker/u8:100:12:012
25293991511,3cyclictest14877-21wc21:00:182
2529399150,12cyclictest0-21swapper/200:36:342
25291991515,0cyclictest0-21swapper/123:49:031
25291991511,2cyclictest0-21swapper/121:11:541
2529199150,14cyclictest0-21swapper/123:15:411
2529199150,14cyclictest0-21swapper/123:15:411
2528699157,7cyclictest18360-21perf21:10:000
2528699154,5cyclictest16915-21idleruntime-cro20:00:000
2528699152,7cyclictest29110-21perf20:25:000
2529699143,3cyclictest225-21systemd-journal21:55:003
2529699142,2cyclictest141rcu_preempt00:31:363
25296991410,4cyclictest90052sleep322:20:513
2529699140,13cyclictest0-21swapper/322:47:383
2529399149,1cyclictest12868-21grep00:20:002
2529399145,1cyclictest0-21swapper/222:05:122
2529399142,1cyclictest141rcu_preempt21:32:112
25293991410,3cyclictest8954-21wc19:40:262
2529399140,14cyclictest0-21swapper/221:56:282
2529199142,5cyclictest2251-21sshd21:38:441
2529199141,2cyclictest0-21swapper/122:35:061
2529199140,14cyclictest0-21swapper/122:29:121
2529199140,14cyclictest0-21swapper/100:18:581
2528699147,3cyclictest7188-21readlink19:40:000
2528699147,3cyclictest7188-21readlink19:40:000
25286991410,3cyclictest3340-21grep20:35:270
2529699139,3cyclictest17015-21head21:05:183
2529699139,2cyclictest1862-21cut20:35:143
2529699138,3cyclictest29087-21idleruntime-cro20:25:003
2529699131,10cyclictest0-21swapper/321:00:133
25296991310,2cyclictest4135-21wc23:35:213
25296991310,2cyclictest1073-21sh22:55:153
2529699130,13cyclictest0-21swapper/300:38:163
2529399139,3cyclictest25785-21tr19:10:142
2529399136,6cyclictest19372-21cstates21:10:152
2529399134,3cyclictest225-21systemd-journal20:02:012
2529399134,3cyclictest225-21systemd-journal00:06:592
2529399131,6cyclictest12712-21df_abs00:00:182
2529399131,3cyclictest141rcu_preempt20:10:012
25293991310,2cyclictest31064-21grep19:20:182
25293991310,2cyclictest2401-21uniq23:15:192
25293991310,2cyclictest2401-21uniq23:15:192
2529399130,2cyclictest0-21swapper/221:47:182
2529399130,13cyclictest0-21swapper/221:53:222
2529399130,13cyclictest0-21swapper/221:19:472
2529399130,12cyclictest0-21swapper/223:07:172
2529199139,3cyclictest23556-21cat20:10:261
2529199139,3cyclictest1093-21cron23:15:001
2529199135,6cyclictest26613-21/usr/sbin/munin23:30:231
2529199132,10cyclictest38150irq/131-snd_hda19:15:151
25291991310,2cyclictest9331-21tr20:50:151
25291991310,2cyclictest7763-21wc20:45:211
25291991310,2cyclictest29691-21tr21:55:131
25291991310,2cyclictest25977-21head22:50:241
25291991310,2cyclictest13470-21ssh21:25:261
25291991310,1cyclictest6133-21wc22:20:001
2529199130,12cyclictest0-21swapper/122:46:041
2528699139,4cyclictest21078-21sh22:09:370
2528699139,3cyclictest24845-21tr22:50:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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