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2026-08-25 - 16:44

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, 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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  Intel
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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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack1slot6s.osadl.org (updated Tue Aug 25, 2026 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
223489910310,69cyclictest0-21swapper/208:17:042
2194991020,5rtkit-daemon2193-21rtkit-daemon08:51:450
238962970,7sleep1201ktimersoftd/110:26:381
2234899974,25cyclictest0-21swapper/210:11:562
22348999719,12cyclictest0-21swapper/208:48:142
2234899954,27cyclictest0-21swapper/207:37:332
2234899954,26cyclictest0-21swapper/210:55:512
219499950,4rtkit-daemon2193-21rtkit-daemon10:32:113
219499950,4rtkit-daemon2193-21rtkit-daemon10:32:113
22348999419,12cyclictest0-21swapper/210:02:372
2234899933,26cyclictest5868-21munin-node09:57:102
2234899933,26cyclictest0-21swapper/209:32:152
2234899925,26cyclictest0-21swapper/210:38:422
2234899924,25cyclictest0-21swapper/210:32:152
2234899924,25cyclictest0-21swapper/210:32:152
2234899923,24cyclictest23476-21munin-node09:37:102
2234899917,22cyclictest15077-21diskmemload08:52:032
2234899914,27cyclictest0-21swapper/209:17:062
22348999128,55cyclictest0-21swapper/210:17:002
2234899904,27cyclictest0-21swapper/206:02:012
2234899904,26cyclictest0-21swapper/210:29:502
2234899904,26cyclictest0-21swapper/209:51:202
2234899904,25cyclictest0-21swapper/210:42:592
22348999022,11cyclictest0-21swapper/211:06:552
2234899894,25cyclictest0-21swapper/209:16:412
2234899894,25cyclictest0-21swapper/209:16:412
2234899894,25cyclictest0-21swapper/207:52:142
2234899894,24cyclictest0-21swapper/210:09:402
2234899885,26cyclictest0-21swapper/209:02:052
2234899884,27cyclictest0-21swapper/208:31:502
2234899884,25cyclictest0-21swapper/209:07:302
2234899884,24cyclictest0-21swapper/209:24:342
2234899884,22cyclictest21825-21ssh10:22:002
2234899883,23cyclictest32478-21ssh09:01:392
2234899875,25cyclictest0-21swapper/208:29:362
2234899874,24cyclictest0-21swapper/211:01:432
2234899874,24cyclictest0-21swapper/207:57:312
2234899873,76cyclictest350-21fschecks_count08:12:002
22348998717,12cyclictest0-21swapper/210:56:542
2234899867,13cyclictest0-21swapper/208:22:022
2234899864,74cyclictest0-21swapper/206:47:122
2234899864,26cyclictest0-21swapper/208:42:072
2234899864,26cyclictest0-21swapper/206:17:212
2234899864,24cyclictest0-21swapper/211:14:142
2234899864,24cyclictest0-21swapper/211:14:142
2234899863,28cyclictest0-21swapper/206:32:142
22348998619,12cyclictest0-21swapper/205:47:142
22348998619,12cyclictest0-21swapper/205:47:142
22348998618,12cyclictest0-21swapper/207:49:332
2234899855,26cyclictest0-21swapper/208:05:232
2234899854,72cyclictest0-21swapper/207:17:162
2234899854,26cyclictest0-21swapper/209:43:172
2234899853,22cyclictest0-21swapper/210:46:562
22348998517,13cyclictest0-21swapper/208:08:152
22348998516,11cyclictest0-21swapper/209:51:532
22348998516,11cyclictest0-21swapper/209:51:532
2234899844,27cyclictest0-21swapper/206:59:512
2234899844,24cyclictest0-21swapper/208:39:452
2234899843,74cyclictest0-21swapper/207:11:452
22348998420,13cyclictest0-21swapper/206:10:362
2234899834,26cyclictest0-21swapper/209:31:292
2234899834,25cyclictest0-21swapper/205:56:592
2234899814,13cyclictest0-21swapper/206:52:042
2234899804,69cyclictest0-21swapper/207:11:552
2234899804,69cyclictest0-21swapper/207:11:552
2234899804,68cyclictest0-21swapper/207:35:332
2234899804,23cyclictest6471-21fschecks_time07:27:032
2234899804,12cyclictest0-21swapper/206:22:052
22348998023,49cyclictest0-21swapper/206:12:012
22348998018,14cyclictest0-21swapper/205:52:032
219499760,23rtkit-daemon0-21swapper/110:57:330
219499760,23rtkit-daemon0-21swapper/110:30:340
2234899754,22cyclictest0-21swapper/207:42:202
2234899754,16cyclictest0-21swapper/207:02:132
2234899744,13cyclictest0-21swapper/207:21:562
22348997418,10cyclictest1227-21runrttasks06:42:172
2234899734,29cyclictest0-21swapper/206:30:482
2234899734,29cyclictest0-21swapper/206:30:482
22348997022,8cyclictest15384-21netstat06:37:112
30042694,12sleep00-21swapper/009:04:540
2234099694,13cyclictest0-21swapper/009:28:350
211812689,49sleep30-21swapper/305:42:083
219499660,6rtkit-daemon2193-21rtkit-daemon06:53:423
219499650,22rtkit-daemon0-21swapper/110:30:413
2234999648,44cyclictest0-21swapper/310:16:383
22346996446,12cyclictest0-21swapper/108:56:531
22340996316,9cyclictest27114-21awk05:56:480
163392634,13sleep10-21swapper/109:25:351
22346996243,12cyclictest0-21swapper/106:06:471
22346996240,17cyclictest0-21swapper/110:50:011
2234099625,14cyclictest0-21swapper/005:47:210
2234099625,14cyclictest0-21swapper/005:47:210
22340996221,23cyclictest0-21swapper/011:12:230
22340996221,23cyclictest0-21swapper/011:12:230
22346996143,12cyclictest0-21swapper/108:01:571
2234099615,13cyclictest0-21swapper/009:45:490
2234099614,13cyclictest23217-21tr07:57:090
2234099614,13cyclictest0-21swapper/008:42:050
2234099614,13cyclictest0-21swapper/008:34:290
2234099614,12cyclictest1227-21runrttasks10:00:510
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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