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2026-04-24 - 15:58

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, 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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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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack3slot6s.osadl.org (updated Fri Apr 24, 2026 12:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
28557211497,12sleep10-21swapper/107:07:481
284322113102,6sleep00-21swapper/007:06:120
28512210897,6sleep30-21swapper/307:07:143
28583210579,6sleep20-21swapper/207:08:092
227762530,1sleep00-21swapper/012:09:350
284452240,1sleep0101ktimersoftd/012:15:130
318432220,1sleep30-21swapper/308:35:163
2875899221,19cyclictest13855-21ssh12:00:103
2875899220,20cyclictest0-21swapper/307:10:113
2875699220,20cyclictest0-21swapper/112:10:111
68722210,1sleep1221ktimersoftd/108:55:011
260892210,0sleep30-21swapper/309:23:123
130472210,1sleep3381ktimersoftd/312:32:383
2875899200,18cyclictest0-21swapper/308:25:103
2875799190,17cyclictest0-21swapper/212:30:102
2875699191,2cyclictest12784-21diskmemload10:35:121
2875899181,15cyclictest0-21swapper/308:50:013
2875799180,7cyclictest0-21swapper/208:03:592
2875699180,16cyclictest0-21swapper/108:25:111
28755991814,2cyclictest0-21swapper/012:30:110
140672180,1sleep30-21swapper/307:50:493
116522180,1sleep10-21swapper/110:15:171
2875899177,6cyclictest3688-21Xorg07:16:013
2875599171,3cyclictest26778-21sh11:05:170
2875799160,4cyclictest0-21swapper/208:34:592
2875699161,2cyclictest11548-21fschecks_time09:05:141
28757991511,2cyclictest0-21swapper/208:40:132
2875799150,6cyclictest0-21swapper/208:54:592
2875799150,4cyclictest0-21swapper/208:57:592
2875799150,13cyclictest0-21swapper/212:28:582
2875699150,13cyclictest0-21swapper/111:24:411
2875599150,2cyclictest0-21swapper/010:30:070
70792141,9sleep07093-21ssh10:10:230
2875899142,7cyclictest0-21swapper/309:00:013
2875899142,6cyclictest0-21swapper/311:15:003
2875799149,3cyclictest6759-21sed09:36:032
2875799142,7cyclictest0-21swapper/208:27:022
28757991411,2cyclictest0-21swapper/212:37:382
28757991411,2cyclictest0-21swapper/211:11:472
2875799141,11cyclictest8752-21apt-get11:55:062
28757991410,2cyclictest24972-21rm12:11:032
2875799140,2cyclictest0-21swapper/210:33:072
2875799140,2cyclictest0-21swapper/210:20:172
2875799140,2cyclictest0-21swapper/208:35:122
2875799140,12cyclictest17239-21runrttasks09:14:282
2875799140,12cyclictest0-21swapper/209:56:272
2875799140,12cyclictest0-21swapper/209:48:112
2875699149,3cyclictest27136-21ssh11:05:201
2875699149,3cyclictest13150-21tr11:25:121
2875699149,3cyclictest0-21swapper/110:46:431
2875699142,6cyclictest0-21swapper/110:55:011
2875699142,2cyclictest0-21swapper/109:55:331
28756991411,2cyclictest0-21swapper/112:04:151
2875699140,3cyclictest0-21swapper/109:18:501
2875699140,2cyclictest12784-21diskmemload12:39:141
2875699140,2cyclictest0-21swapper/110:14:591
2875699140,12cyclictest0-21swapper/112:20:281
2875699140,12cyclictest0-21swapper/111:35:041
2875699140,12cyclictest0-21swapper/110:21:161
2875699140,12cyclictest0-21swapper/109:10:071
28755991411,2cyclictest12784-21diskmemload10:02:160
2875599140,12cyclictest27111-21ssh11:40:120
2875599140,12cyclictest0-21swapper/009:20:380
54772130,2sleep10-21swapper/112:25:131
32322130,1sleep20-21swapper/210:06:252
2875899132,6cyclictest0-21swapper/310:20:003
2875899132,6cyclictest0-21swapper/309:44:593
2875899131,10cyclictest0-21swapper/309:30:113
28758991310,2cyclictest0-21swapper/307:55:173
2875899130,3cyclictest10695-21latency_hist07:45:003
2875799139,2cyclictest0-21swapper/211:41:172
28757991310,2cyclictest0-21swapper/212:20:072
28757991310,2cyclictest0-21swapper/212:05:572
28757991310,2cyclictest0-21swapper/211:39:232
28757991310,2cyclictest0-21swapper/211:25:022
28757991310,2cyclictest0-21swapper/211:05:522
28757991310,2cyclictest0-21swapper/210:52:422
28757991310,2cyclictest0-21swapper/210:46:122
28757991310,2cyclictest0-21swapper/210:43:082
28757991310,2cyclictest0-21swapper/209:21:022
28757991310,2cyclictest0-21swapper/209:05:112
28757991310,2cyclictest0-21swapper/208:20:142
2875799130,4cyclictest0-21swapper/208:47:592
2875799130,4cyclictest0-21swapper/208:14:592
2875799130,4cyclictest0-21swapper/207:59:582
2875799130,12cyclictest0-21swapper/210:38:082
2875799130,12cyclictest0-21swapper/210:15:082
2875799130,12cyclictest0-21swapper/210:01:482
2875799130,12cyclictest0-21swapper/209:29:572
2875699132,6cyclictest0-21swapper/108:45:011
2875699132,6cyclictest0-21swapper/108:15:001
2875699132,6cyclictest0-21swapper/108:10:011
28756991310,2cyclictest12784-21diskmemload10:51:561
28756991310,2cyclictest0-21swapper/111:56:401
28756991310,2cyclictest0-21swapper/111:51:451
28756991310,2cyclictest0-21swapper/111:32:111
28756991310,2cyclictest0-21swapper/111:32:101
28756991310,2cyclictest0-21swapper/111:15:291
28756991310,2cyclictest0-21swapper/110:42:071
28756991310,2cyclictest0-21swapper/110:33:171
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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