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2026-04-13 - 05:08

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #4

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 rack0slot4s.osadl.org (updated Mon Apr 13, 2026 00:46:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4224142367325,14sleep80-21swapper/819:09:2114
4224002367328,13sleep140-21swapper/1419:09:116
4223112367331,12sleep50-21swapper/519:07:5711
4222072360351,6sleep150-21swapper/1519:06:487
4223302359339,13sleep70-21swapper/719:08:1613
4222492358339,13sleep100-21swapper/1019:07:152
4223472356337,13sleep30-21swapper/319:08:289
4223982355347,5sleep120-21swapper/1219:09:084
4189542354335,12sleep110-21swapper/1119:05:063
4224342353333,13sleep90-21swapper/919:09:3915
4224442352332,13sleep10-21swapper/119:09:471
4222332352332,13sleep00-21swapper/019:07:050
4222832351330,14sleep20-21swapper/219:07:398
4224192350331,13sleep130-21swapper/1319:09:255
4223502350330,13sleep60-21swapper/619:08:3112
4224472348328,13sleep40-21swapper/419:09:4910
422978994140,1cyclictest0-21swapper/1419:10:156
42297899360,23cyclictest0-21swapper/1420:43:016
422951993535,0cyclictest0-21swapper/520:15:1411
42296699330,30cyclictest0-21swapper/1023:55:152
422954993329,1cyclictest451189-21mii-tool19:40:1312
42295499330,30cyclictest0-21swapper/622:30:1512
422951993333,0cyclictest0-21swapper/523:26:4711
422943993332,1cyclictest618452-21kworker/u32:0+events_unbound22:20:248
422937993333,0cyclictest0-21swapper/019:10:140
42297099320,29cyclictest0-21swapper/1120:55:153
422951993232,0cyclictest0-21swapper/500:09:3211
42297899310,30cyclictest0-21swapper/1422:43:026
42297899310,30cyclictest0-21swapper/1421:19:276
42297899310,30cyclictest0-21swapper/1420:15:126
422972993130,1cyclictest1774-21snmpd00:30:544
422972993130,1cyclictest0-21swapper/1220:19:474
42297099310,30cyclictest0-21swapper/1119:57:283
422966993130,1cyclictest667072-21kworker/10:0+events23:04:212
422966993130,1cyclictest1774-21snmpd20:39:482
422966993130,1cyclictest1774-21snmpd00:16:152
422966993129,1cyclictest705630-21kworker/10:0+events00:39:372
422966993129,1cyclictest705630-21kworker/10:0+events00:26:152
422966993129,1cyclictest705630-21kworker/10:0+events00:08:132
422966993129,1cyclictest659660-21kworker/10:1+events23:27:082
422966993129,1cyclictest641436-21kworker/10:2+events22:44:252
422966993129,1cyclictest365269-21kworker/10:1+events21:46:382
422966993129,1cyclictest365269-21kworker/10:1+events21:46:382
422966993129,1cyclictest365269-21kworker/10:1+events21:18:242
422966993129,1cyclictest365269-21kworker/10:1+events21:14:362
422966993129,1cyclictest0-21swapper/1022:25:562
42296099310,31cyclictest0-21swapper/819:28:1014
42295899310,2cyclictest796214-21updatedb00:39:0413
422954993130,1cyclictest1774-21snmpd20:44:1212
42295499310,30cyclictest0-21swapper/622:36:4512
42294599310,30cyclictest0-21swapper/300:14:179
42293999310,30cyclictest0-21swapper/123:39:251
42293999310,30cyclictest0-21swapper/121:36:511
42293999310,30cyclictest0-21swapper/121:03:011
42293799310,30cyclictest0-21swapper/021:42:220
42293799310,30cyclictest0-21swapper/021:42:220
42298199300,30cyclictest750757-21ssh00:02:117
42298199300,1cyclictest0-21swapper/1522:30:157
422978993029,1cyclictest1774-21snmpd22:52:066
422978993029,1cyclictest1774-21snmpd20:09:306
42297899300,30cyclictest0-21swapper/1422:19:326
422975993029,1cyclictest0-21swapper/1320:14:575
42297599300,30cyclictest0-21swapper/1320:01:075
42297599300,1cyclictest0-21swapper/1321:54:115
42297599300,1cyclictest0-21swapper/1321:54:115
422972993029,1cyclictest1774-21snmpd23:34:344
422972993029,1cyclictest1774-21snmpd20:25:534
422972993029,1cyclictest1774-21snmpd19:45:354
42297299300,1cyclictest0-21swapper/1221:30:304
42297099300,29cyclictest0-21swapper/1121:03:213
42297099300,1cyclictest0-21swapper/1123:26:343
42297099300,1cyclictest0-21swapper/1121:06:583
42297099300,1cyclictest0-21swapper/1119:17:133
422966993030,0cyclictest705630-21kworker/10:0+events23:47:032
422966993030,0cyclictest705630-21kworker/10:0+events00:13:322
422966993030,0cyclictest365269-21kworker/10:1+events20:29:442
422966993030,0cyclictest365269-21kworker/10:1+events20:24:312
422966993029,1cyclictest705630-21kworker/10:0+events00:21:272
422966993029,1cyclictest705630-21kworker/10:0+events00:00:422
422966993029,1cyclictest589297-21kworker/10:0+events22:15:072
422966993029,1cyclictest589297-21kworker/10:0+events22:10:252
422966993029,1cyclictest589297-21kworker/10:0+events22:03:292
422966993029,1cyclictest365269-21kworker/10:1+events21:35:312
422966993029,1cyclictest365269-21kworker/10:1+events21:27:072
422966993029,1cyclictest365269-21kworker/10:1+events19:40:242
422966993028,1cyclictest705630-21kworker/10:0+events00:31:292
422964993029,1cyclictest1774-21snmpd21:03:0615
42296499300,1cyclictest0-21swapper/920:32:5015
422960993029,1cyclictest1774-21snmpd21:03:4014
422960993029,1cyclictest1774-21snmpd19:16:2214
422960993029,1cyclictest0-21swapper/819:39:2514
422958993029,1cyclictest1774-21snmpd22:12:4913
42295899300,1cyclictest0-21swapper/723:50:3813
42295899300,1cyclictest0-21swapper/720:54:3013
422954993029,1cyclictest424936-21ethtool19:10:1512
422954993029,1cyclictest1774-21snmpd22:42:5412
42295499300,29cyclictest0-21swapper/620:08:3012
42295499300,1cyclictest0-21swapper/622:58:2112
42295499300,1cyclictest0-21swapper/600:10:4812
422951993030,0cyclictest0-21swapper/523:06:4511
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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